Abstract

A power receiver device includes a receiver coil including a first coil and a second coil different in power receiving period when performing wireless power transfer. The first coil is longer in power receiving period than the second coil. The resonant circuit unit (150) includes the first resonant capacitor (141) connected to the first coil, a second resonant capacitor (142) connected to the second coil, and a heat dissipation structure in which a heat dissipation performance of the first resonant capacitor (141) is higher than a heat dissipation performance of the second resonant capacitor (142).

IPC Classes  ?

• B60L 53/122 - Circuits or methods for driving the primary coil, i.e. supplying electric power to the coil
• H01F 38/14 - Inductive couplings
• H02J 50/00 - Circuit arrangements or systems for wireless supply or distribution of electric power
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type

Abstract

A power transmitter (20) includes a power-transmitter control unit (70) and power-transmitter communication coils (40a to 40d). A power receiver (100) includes a power-receiver communication coil (170) and a power-receiver control unit (230). The power-transmitter communication coils (40a to 40d) are arranged such that at least a part of each receivable range is different. The power-receiver control unit divides vehicle-side information into multiple pieces, includes each piece in separate communication frames, and transmits the communication frames via the power-receiver communication coil at different timings. The power-transmitter control unit receives the communication frames via the power-transmitter communication coils, respectively, receives the vehicle-side information from the received communication frames, and controls energization of a power transmitter coil (22) based on the vehicle-side information. Accordingly, necessary information can be transmitted.

IPC Classes  ?

• B60L 53/12 - Inductive energy transfer
• B60L 53/126 - Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils

Abstract

In a wireless power transfer system, a power transmitter coil is provided at a travel path, and wireless power transfer is performed between the power transmitter coil at the travel path and an in-vehicle power receiver coil (102) when a vehicle (400) travels on the travel path. Two or more power receiver coils (power receivers 100) can be mounted on the vehicle. An ECU (430) includes a recognition unit that recognizes power receiving capability information indicating a power receiving capability of the vehicle by the power receiver coil mounted on the vehicle, and a power receiving control unit that performs power receiving control based on the power receiving capability information recognized by the recognition unit.

IPC Classes  ?

• B60L 53/12 - Inductive energy transfer
• B60L 53/122 - Circuits or methods for driving the primary coil, i.e. supplying electric power to the coil
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/66 - Data transfer between charging stations and vehicles

Abstract

A wireless power transfer system includes a power transmitter having a power transmitter coil provided at a travel path, and a power receiver (100) mounted on a vehicle (400) and including a power receiver coil (102) that performs wireless power transfer with the power transmitter coil. A motor (412) can be driven by power received by the power receiver, and the vehicle can travel by driving the motor. An ECU (430) includes an acquisition unit that acquires power receiving amount information indicating a power receiving amount per unit time received by the power receiver in the vehicle, and a travel control unit that executes control related to vehicle travel based on the power receiving amount information acquired by the acquisition unit.

IPC Classes  ?

• B60L 9/00 - Electric propulsion with power supply external to the vehicle
• B60L 53/12 - Inductive energy transfer
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/66 - Data transfer between charging stations and vehicles

Abstract

The power transmitter (20) includes a power transmitter coil (22), and wirelessly supplies power from the power transmitter coil to a power receiver coil (102) included in a power receiver (100) of a vehicle. The power transmitter includes a power-transmitter control unit (70) that controls energization of the power transmitter coil, and a power-transmitter communication coil (40). The power receiver includes a power-receiver communication coil (170) for wireless communication with the power-transmitter communication coil, and a power-receiver control unit (230) that controls energization of the power-receiver communication coil. The power-receiver control unit modulates a generated vehicle-side signal and supplies it to the power-receiver communication coil. The power-transmitter control unit determines whether there is a power supply request based on the demodulated signal of the output signal from the power-transmitter communication coil 40, and energizes the power transmitter coil when it is determined that there is a power supply request.

IPC Classes  ?

• B60L 53/12 - Inductive energy transfer
• B60L 53/122 - Circuits or methods for driving the primary coil, i.e. supplying electric power to the coil
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/126 - Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• B60L 53/66 - Data transfer between charging stations and vehicles
• B60L 53/67 - Controlling two or more charging stations

Abstract

A power-receiver control unit (230) encodes a requested power into a bit sequence such that a relatively smaller value is dominant and a relatively larger value is recessive in each value of the bit sequence, and includes the encoded requested power in a specific signal. The power-receiver control unit supplies the specific signal including a power supply request signal and the requested power to a power-receiver communication coil (170). A power-transmitter control unit (70) determines whether there is a power supply request based on an output signal of a power-transmitter communication coil (40), and decodes the encoded requested power. On condition that the power-transmitter control unit determines that there is a power supply request, the power-transmitter control unit energizes a power transmitter coil (22) so that power supplied from the power transmitter coil to a power receiver coil (102) becomes the decoded requested power.

IPC Classes  ?

• B60L 53/12 - Inductive energy transfer
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/66 - Data transfer between charging stations and vehicles
• H04L 27/02 - Amplitude-modulated carrier systems, e.g. using on/off keyingSingle sideband or vestigial sideband modulation

Abstract

A power-transmitter control unit (70) energizes a power transmitter coil (22) when determining that there is a power supply request based on an output signal of a power-transmitter communication coil (40), and stop energization of the power transmitter coil when determining that there is no power supply request. A power-receiver control unit (230) supplies a stop request signal to a power-receiver communication coil (170), when determining that a start condition is satisfied. The stop request signal is a signal requesting a stop of power supply from the power transmitter coil to a power receiver coil (102). The power-transmitter control unit stops energization of the power transmitter coil, when determining that the stop request signal has been input based on the output signal of the power-transmitter communication coil.

IPC Classes  ?

• B60L 9/00 - Electric propulsion with power supply external to the vehicle
• B60L 53/12 - Inductive energy transfer
• B60L 53/30 - Constructional details of charging stations
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/66 - Data transfer between charging stations and vehicles

Abstract

A power-transmitter control unit (70) calculates an intensity of a power supply request signal based on an output signal of a power-transmitter communication coil (40). The power-transmitter control unit stops energization of a power transmitter coil (22) when determining that the calculated intensity is lower than a determination threshold. The power-transmitter control unit energizes the power transmitter coil when determining that the calculated intensity is higher than the determination threshold. The power-transmitter control unit prevents energization of the power transmitter coil when determining that the calculated intensity is higher than a detection threshold that is higher than the determination threshold, even though a target vehicle corresponding to the intensity higher than the detection threshold is present near the power transmitter coil that is a target of energization control by the power-transmitter control unit.

IPC Classes  ?

• B60L 9/00 - Electric propulsion with power supply external to the vehicle
• B60L 53/12 - Inductive energy transfer
• B60L 53/30 - Constructional details of charging stations
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/66 - Data transfer between charging stations and vehicles

Abstract

A power-receiver control unit (230) of a power receiver (100) performs a search mode to temporarily stop supply of a power supply request signal to a power-receiver communication coil (170) when supplying the power supply request signal to the power-receiver communication coil (170). The power-receiver control unit (230) transmits, to a power transmitter (20), a lowering instruction signal of power supply from a power-transmitter coil (22) to a power-receiver coil (102), when determining that an electric current flows in the power-receiver coil (102) during performing the search mode.

IPC Classes  ?

• B60L 9/00 - Electric propulsion with power supply external to the vehicle
• B60L 53/12 - Inductive energy transfer
• B60L 53/30 - Constructional details of charging stations
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/66 - Data transfer between charging stations and vehicles

Abstract

A wireless power supply system acquires transmitted power associated with vehicle ID information of a target vehicle of power supply, and　received power associated with the vehicle ID information of the target vehicle of power supply, and　determines whether the acquired transmitted power and the acquired received power in the vehicle identified by the same ID information are in a same level. A power-transmitter control unit (70) of the wireless power supply system (a) acquires the vehicle ID information of the target vehicle in which the transmitted power and the received power are not in the same level, and (b) stops energization to a power-transmitter coil (22) based on the acquired information even in case of determining that there is a power supply request of the target vehicle.

IPC Classes  ?

• B60L 9/00 - Electric propulsion with power supply external to the vehicle
• B60L 53/12 - Inductive energy transfer
• B60L 53/30 - Constructional details of charging stations
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/66 - Data transfer between charging stations and vehicles

Abstract

Test communication coils (401 to 404) are provided near a specific region (R10) of an inspection location of a vehicle (11), which receive radio waves from a power receiver side communication coil (170) and convert the radio waves into an electric signal.　 At the inspection location, a test control device (405) is provided, which inputs an electric signal from the test communication coils (401 to 404).　 When the vehicle (11) is parked in the specific region (R10), the test control device (405) wirelessly transmits radio waves from the power receiver side communication coil (170), receives the radio waves through the test communication coils (401 to 404), and diagnoses a transmission function of a power receiver device (100) based on an intensity of an electric signal acquired as a result of the reception.

IPC Classes  ?

• B60L 53/12 - Inductive energy transfer
• B60L 53/30 - Constructional details of charging stations
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 9/00 - Electric propulsion with power supply external to the vehicle
• B60L 53/66 - Data transfer between charging stations and vehicles

Abstract

A power-transmitter control unit (70) includes determination circuits (83A, 83B) which receive an output signal from a power-transmitter communication coil (40) and determine whether there is a power supply request based on the output signal, and a power-transmitter controller (71) which controls energization of a power transmitter coil based on determination results in order to wirelessly supply power to a power receiver coil of a vehicle. The power-transmitter controller energizes the power transmitter coil on condition that the determination results indicating that there is a power supply request are input from the determination circuits.

IPC Classes  ?

• B60L 9/00 - Electric propulsion with power supply external to the vehicle
• B60L 53/12 - Inductive energy transfer
• B60L 53/30 - Constructional details of charging stations
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/65 - Monitoring or controlling charging stations involving identification of vehicles or their battery types

Abstract

A power transmitter side control unit (70) calculates an intensity value of a power supply request signal based on an output signal of a reference communication antenna, which is a communication antenna among the power transmitter side communication coils (40), and acquires ID information of a vehicle, when it is determined that the calculated intensity value exceeds a determination threshold, energizes a power transmitter coil (22), and calculates, in association with the ID information, a determination period, which is a period from when the calculated intensity value exceeds the determination threshold to when the calculated intensity value falls below the determination threshold.　 When a target vehicle is a vehicle provided with a power receiver device (100) of which a communication function is to be diagnosed, the power transmitter side control unit (70) diagnoses the communication function of the power receiver device (100) provided in the target vehicle based on a determination period associated with ID information of the target vehicle and a determination period associated with each of multiple pieces of the ID information.

IPC Classes  ?

• B60L 9/00 - Electric propulsion with power supply external to the vehicle
• B60L 53/12 - Inductive energy transfer
• B60L 53/30 - Constructional details of charging stations
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/66 - Data transfer between charging stations and vehicles

Abstract

A power-transmitter control unit (70) calculates an intensity of a power supply request signal based on an output signal of a power-transmitter communication coil (40), and energizes a power transmitter coil (22) when determining that the calculated intensity exceeds a determination threshold. The power-transmitter control unit calculates a determination period, which is a period from when the calculated intensity exceeds the determination threshold until it falls below the determination threshold, calculates a ratio between the calculated determination period and an energization period of the power transmitter coil, and diagnoses a communication function of a power transmitter (20) based on the calculated ratio.

IPC Classes  ?

• B60L 9/00 - Electric propulsion with power supply external to the vehicle
• B60L 53/12 - Inductive energy transfer
• B60L 53/30 - Constructional details of charging stations
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/66 - Data transfer between charging stations and vehicles

Abstract

A power receiver (100) includes a power receiver coil that receives power wirelessly from a power transmitter coil of a power transmitter (20), a power-receiver communication coil (170) for performing wireless communication, a signal transmitter (240) that performs wireless communication with the power transmitter via the power-receiver communication coil, and a stabilization circuit (402) that stabilizes power delivered to the power-receiver communication coil. This allows the signal strength to be maintained at an appropriate value.

IPC Classes  ?

• B60L 53/12 - Inductive energy transfer
• B60L 53/122 - Circuits or methods for driving the primary coil, i.e. supplying electric power to the coil
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices

Abstract

A wireless power supply system includes a power transmitter device (20) including multiple power transmitter coils (22) and an in-vehicle power receiver device (100) including a power receiver coil (102).　 In the wireless power supply system, a power supply request signal to request power supply is transmitted from the power receiver device (100) to the power transmitter device (20), and upon receiving the power supply request signal, the power transmitter device (20) supplies power to the power receiver coil (102) in a wireless manner by energizing the power transmitter coil (22).　 The power receiver device (100) wirelessly transmits the power supply request signal from a power receiver side communication coil (170) to a power transmitter side communication coil (40 provided in the power transmitter device (20).　 The power receiver side control unit (230 acquires a relative parameter indicating a relative position or orientation of the power receiver side communication coil (170) with respect to the power transmitter side communication coil (40) in the vehicle, and adjusts an intensity of the power supply request signal based on the relative parameter.

IPC Classes  ?

• B60L 53/12 - Inductive energy transfer
• B60L 53/36 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles by positioning the vehicle
• B60L 53/38 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Abstract

A power transmitter side control unit (70) of a power transmitter device (20) calculates an intensity value of a power supply request signal based on an output signal of a power transmitter side communication coil (40).　 The power transmitter side control unit (70) energizes a power transmitter coil (22) on condition that it is determined that the calculated intensity value exceeds a determination threshold.　 When a driving speed of a vehicle (11) to which power is supplied in a wireless manner from the power transmitter coil (22) is low, the power transmitter side control unit (70) sets the determination threshold to be larger than when the driving speed is high.

IPC Classes  ?

• B60L 53/122 - Circuits or methods for driving the primary coil, i.e. supplying electric power to the coil
• B60L 53/66 - Data transfer between charging stations and vehicles
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Abstract

A power receiver device (100) includes a power receiver side communication coil (170), a power receiver side control unit (230) configured to control energization of the power receiver side communication coil (170) to supply a power supply request signal to a power transmitter coil (22) to the power receiver side communication coil (170), and a detector coil (401) configured to detect a magnetic field signal generated by the power receiver side communication coil (170) or a correlation value of the magnetic field signal.　 A power receiver side controller (231) of the power receiver side control unit (230) calculates a target output voltage of a power source constituting a transmitter (240) based on a detected value of the detector coil (401).　 The power receiver side controller (231) controls an output voltage of the power source to the target output voltage.

IPC Classes  ?

• B60L 53/12 - Inductive energy transfer
• B60L 53/122 - Circuits or methods for driving the primary coil, i.e. supplying electric power to the coil
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices

Abstract

A power-transmitter control unit (70) calculates an intensity of a power supply request signal based on a signal received by a power-transmitter communication coil (40), and energizes a power transmitter coil (22) on condition that the calculated intensity is determined to exceed a determination threshold. The power-transmitter control unit determines whether a vehicle that is a source of a signal received by an earlier-appearing communication coil and a vehicle that is a source of a signal received by a later-appearing communication coil are the same vehicle. The earlier-appearing communication antenna and the later-appearing communication antenna are power-transmitter communication antennas adjacent to each other in the vehicle travel direction. the power-transmitter control unit uses the received signal of the earlier appearing communication coil to control energization of a later-appearing power transmitter coil that is the power transmitter coil corresponding to the later-appearing communication coil.

IPC Classes  ?

• B60L 53/122 - Circuits or methods for driving the primary coil, i.e. supplying electric power to the coil
• B60L 53/126 - Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Abstract

In a wireless power transfer system, a power transmitter coil is provided at a travel path, and wireless power transfer is performed between the power transmitter coil at the travel path and an in-vehicle power receiver coil (102) when a vehicle (400) travels on the travel path. The vehicle includes power receivers (100) including a power receiver coil. An ECU (430) includes a determination unit that determines a power receiver to be used for the wireless power transfer among the power receivers, and a power receiving control unit that performs the wireless power transfer using the power receiver determined by the determination unit.

IPC Classes  ?

• B60L 53/12 - Inductive energy transfer
• B60L 53/122 - Circuits or methods for driving the primary coil, i.e. supplying electric power to the coil
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/66 - Data transfer between charging stations and vehicles
• B60L 58/12 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]

Abstract

The power-receiver control unit (230) supplies a stop request signal, which indicates a request to stop power supply to a power transmitter antenna, to a power-receiver communication antenna (170), when a specified stop condition, which is for requesting the power transmitter antenna (22) to stop supplying power, is satisfied. When determining that there is a power supply stop request based on the stop request signal received by the power-transmitter communication antenna (40), the power-transmitter control unit (70) stops the power supply prior to determination that there is a power supply request. The power-receiver control unit determines that a function of the power-receiver communication antenna to transmit the stop request signal or a function of the power-transmitter communication antenna to receive the stop request signal is abnormal, based on power supply that is performed even though the stop request signal is supplied to the power-receiver communication antenna.

IPC Classes  ?

• H02J 50/20 - Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Abstract

A power-receiver control unit (230) supplies and stops supplying a power supply request signal, which indicates a power supply request to a power transmitting antenna (22), to a power-receiver communication antenna (170). A power-transmitter control unit (70) causes the power transmitting antenna to perform power supply to a power receiving antenna (102) when it determines that there is a power supply request based on the power supply request signal received by a power-transmitter communication antenna (40), and stop the power supply when it determines that there is no power supply request. The power-receiver control unit can communicate with a vehicle (11) equipped with a power receiver (100), and transmit a notification signal to the vehicle based on a fact that power supply is being performed despite no power supply being requested.

IPC Classes  ?

• B60L 9/00 - Electric propulsion with power supply external to the vehicle
• B60L 53/12 - Inductive energy transfer
• B60L 53/30 - Constructional details of charging stations
• B60L 53/38 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer
• B60L 53/66 - Data transfer between charging stations and vehicles

Abstract

A power-transmitter control unit (70) energizes a power transmitter coil (22) when determining that there is a power supply request based on an output signal of a power-transmitter communication coil (40), and stop energization of the power transmitter coil when determining that there is no power supply request. The power-transmitter control unit stops energization of the power transmitter coil when determining that a stop request signal is input based on the output signal of the power-transmitter communication coil. The stop request signal is a signal requesting for stop of power supply from a power transmitter coil (22) to a power receiver coil (102). The power-receiver control unit (230) supplies the stop request signal to a power-receiver communication coil (170) when determining that a start condition is satisfied.

IPC Classes  ?

• B60L 9/00 - Electric propulsion with power supply external to the vehicle
• B60L 53/12 - Inductive energy transfer
• B60L 53/30 - Constructional details of charging stations
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/66 - Data transfer between charging stations and vehicles

Abstract

A power receiver coil (110) of a power receiver (100) includes a main power receiver coil (110a) that supplies power received from a power transmitter coil (22) to a high-voltage storage battery (300), and a sub power receiver coil (110b) that receives power from the power transmitter coil when the main power receiver coil is receiving power from the power transmitter coil. The power receiver also includes a rectifier circuit (200) capable of performing short-circuit control to short-circuit the main power receiver coil, a short-circuit control circuit (360) that controls the rectifier circuit, and a communication unit (400) that can transmit a power supply stop signal. The short-circuit control circuit performs the short-circuit control when receiving operating power only from the sub power receiver coil.

IPC Classes  ?

• H02J 7/60 -
• H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
• H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices

Abstract

A power receiver device (100) includes a power receiver side communication coil (170), a power receiver side control unit (230) configured to control energization of the power receiver side communication coil (170) to supply a power supply request signal to a power transmitter coil (22) to the power receiver side communication coil (170), and a detector coil (401) configured to detect a magnetic field signal generated by the power receiver side communication coil (170) or a correlation value of the magnetic field signal.　 The power receiver side control unit (230) determines whether an abnormality occurs in communication with the power receiver device (100) based on a detected value of the detector coil (401).

IPC Classes  ?

• B60L 9/00 - Electric propulsion with power supply external to the vehicle
• B60L 53/12 - Inductive energy transfer
• B60L 53/30 - Constructional details of charging stations
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/66 - Data transfer between charging stations and vehicles

Abstract

A power receiver device (100) includes a power receiver side communication coil (170), and a power receiver side control unit (230) configured to control energization of the power receiver side communication coil (170) to supply a power supply request signal to a power transmitter coil (22) to the power receiver side communication coil (170).　 The power receiver side control unit (230) includes a generator circuit configured to generate a high-frequency signal as a power supply request signal, a power source, an amplifier operating by being supplied with power from the power source and that is configured to amplify the high-frequency signal generated by the generator circuit and supply the amplified high-frequency signal to the power receiver side communication coil (170), and a power receiver side controller (231) configured to operate the power source to control a voltage supplied from the power source to the amplifier to a target output voltage.　 The power receiver side controller (231) determines whether an abnormality has occurred in communication of the power receiver device (100) based on power supplied from the power source to the amplifier.

IPC Classes  ?

• B60L 9/00 - Electric propulsion with power supply external to the vehicle
• B60L 53/12 - Inductive energy transfer
• B60L 53/30 - Constructional details of charging stations
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/66 - Data transfer between charging stations and vehicles

Abstract

The power transmitter (20) includes a power transmitter coil (22) provided on a road along which a vehicle travels, and wirelessly supplies power from the power transmitter coil to a power receiver coil (102) included in a power receiver (100) of a vehicle. The power transmitter includes a power-transmitter control unit (70) that controls energization of the power transmitter coil, and a power-transmitter communication coil (40) provided near the power transmitter coil. The power receiver (100) includes a power-receiver communication coil (170) for wireless communication with the power-transmitter communication coil, and supplies the power-receiver communication coil with a power supply request signal for the power transmitter coil. The power-transmitter control unit executes a diagnostic process for diagnosing a signal-receiving function of the power transmitter.

IPC Classes  ?

• B60L 9/00 - Electric propulsion with power supply external to the vehicle
• B60L 53/12 - Inductive energy transfer
• B60L 53/30 - Constructional details of charging stations
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/66 - Data transfer between charging stations and vehicles

Abstract

The wireless power transfer system includes a power receiver (100) mounted on a vehicle and a power transmitter (20). The power transmitter includes a power-transmitter control unit (70) that calculates an intensity of a power supply request signal based on a signal received by a power-transmitter communication coil (40). The power-transmitter control unit determines that an abnormality has occurred in communication of the power transmitter on condition that it determines that the calculated intensity is outside an expected intensity range.

IPC Classes  ?

• B60L 9/00 - Electric propulsion with power supply external to the vehicle
• B60L 53/12 - Inductive energy transfer
• B60L 53/30 - Constructional details of charging stations
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/66 - Data transfer between charging stations and vehicles

Abstract

The wireless power transfer system includes a power transmitter (20), a power receiver (100), and an inspection vehicle (400). The power transmitter includes a power-transmitter communication coil (40) and a power-transmitter control unit (70) that controls energization of a power transmitter coil (22) based on a power supply request signal received by the power-transmitter communication coil. The inspection vehicle includes a test communication coil (411) for wireless communication with the power-transmitter communication coil, and a transmission circuit (412) for supplying a diagnostic power supply request signal to the test communication coil. The power-transmitter control unit acquires the diagnostic power supply request signal received by the power-transmitter communication coil, and diagnoses a communication function of the power transmitter based on the acquired power supply request signal.

IPC Classes  ?

• B60L 9/00 - Electric propulsion with power supply external to the vehicle
• B60L 53/12 - Inductive energy transfer
• B60L 53/30 - Constructional details of charging stations
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/66 - Data transfer between charging stations and vehicles

Abstract

A power receiver device mounted on a vehicle includes a power receiver antenna and wirelessly supplied with power from a power transmitting antenna of the power transmitting device to the power receiver antenna. The power receiver device includes a power-receiver communication antenna, a case (101a) accommodating the power receiver antenna and the power-receiver communication antenna and to be fixed to a vehicle body (11a) of the vehicle, a sensor (91, 95) configured to detect a correlation amount, which is correlated with an external force acting on the case, and a power-receiver control unit configured to determine that abnormality occurs in the power-receiver communication antenna based on the correlation amount detected by the sensor.

IPC Classes  ?

• B60L 9/00 - Electric propulsion with power supply external to the vehicle
• B60L 53/12 - Inductive energy transfer
• B60L 53/30 - Constructional details of charging stations
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/66 - Data transfer between charging stations and vehicles

Abstract

A wireless power supply system includes a power transmitter device (20) including a power transmitter coil (22) and a power receiver device (100 including a power receiver coil (102).　 In the wireless power supply system, a power supply request signal for requesting power supply is transmitted from the power receiver device (100) to the power transmitter device (20), and upon receiving the power supply request signal, the power transmitter device (20) supplies power to the power receiver coil (102) in a wireless manner by energizing the power transmitter coil (22).　 The power receiver device (100) wirelessly transmits the power supply request signal from a power receiver side communication coil (170) to a power transmitter side communication coil (40) provided in the power transmitter device (20).　 When a traveling speed of a vehicle is low, a power receiver side control unit (230) reduces an intensity of the power supply request signal compared to when the traveling speed of the vehicle is high.

IPC Classes  ?

• B60L 53/12 - Inductive energy transfer
• B60L 53/122 - Circuits or methods for driving the primary coil, i.e. supplying electric power to the coil
• B60L 53/126 - Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Abstract

A power receiver device (100) mounted on a vehicle includes a power receiver side communication coil (170) and a power receiver side control unit 230) that supplies a power supply request signal to the power receiver side communication coil (170).　 A power transmitter device (20) includes a power transmitter side communication coil (40) and a power transmitter side control unit (70) that controls energization of a power transmitter coil (22) based on a power supply request signal received by the power transmitter side communication coil (40).　 A power transmitter side control unit (70) calculates a correction value for an intensity value of the power supply request signal and transmits the calculated correction value to the power receiver side control unit (230).　 The power receiver side control unit (230) corrects the intensity value of the power supply request signal to be supplied to the power receiver side communication coil (170) based on the received correction value.

IPC Classes  ?

• B60L 53/12 - Inductive energy transfer
• B60L 53/122 - Circuits or methods for driving the primary coil, i.e. supplying electric power to the coil
• B60L 53/36 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles by positioning the vehicle
• B60L 53/38 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Abstract

A power transmitter side control unit (70) of a power transmitter device (20) energizes a power transmitter antenna on condition that it is determined that there is a power supply request based on a power supply request signal received by a power transmitter side communication antenna (40), searches for a suitable frequency of a voltage applied to the power transmitter antenna at which an energized state of the power transmitter antenna satisfies a predetermined condition in a predetermined frequency range including a predetermined resonance frequency of a wireless power transfer system including a power transmitter antenna (22) and a power receiver antenna (102), and sets the suitable frequency to a frequency of a current flowing through the power transmitter antenna when it is determined that there is a suitable frequency, and stops energizing the power transmitter antenna when it is determined that there is no suitable frequency.　 On the other hand, the power transmitter side control unit narrows the predetermined frequency range when a traveling speed is lower than a predetermined speed based on a traveling speed signal, compared to when the traveling speed is not lower than the predetermined speed.

IPC Classes  ?

• B60L 53/122 - Circuits or methods for driving the primary coil, i.e. supplying electric power to the coil
• B60L 53/126 - Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Abstract

A power-transmitter control unit (70) of a power transmitter device (20) energizes a power transmitter coil when determining that there is power supply request based on a power supply request signal received by a power-transmitter communication antenna (40) and stops energization of the specific transmitter antenna when determining based on vehicle identification information received by a power-transmitter communication antenna that a period, during which power is continuously supplied from a specific power transmitter antenna (22) to a vehicle identified by the vehicle identification information, exceeds a determination period.

IPC Classes  ?

• B60L 53/12 - Inductive energy transfer
• B60L 53/122 - Circuits or methods for driving the primary coil, i.e. supplying electric power to the coil
• B60L 53/66 - Data transfer between charging stations and vehicles
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Abstract

A power-transmitter controller (70) of a power transmitter device (20) compares a magnitude of a current flowing through a power transmitter antenna (22) or its correlation value with a threshold, energizes a power transmitter antenna when determining that there is a power supply request based on a power supply request signal received by a power-transmitter communication antenna (40), determines whether the relative positional relationship between the power transmitter antenna and the power receiver antenna (102) is appropriate, and stops the power supply to the power transmitter antenna when determining that the relative positional relationship is not appropriate. On the other hand, the power-transmitter control unit changes, based on a traveling speed signal received by the power-transmitter communication antenna, the threshold to narrow a range of the relative positional relationship that is determined to be appropriate when the traveling speed is lower than a predetermined speed, compared with a case where the traveling speed is not lower than the predetermined speed.

IPC Classes  ?

• B60L 53/122 - Circuits or methods for driving the primary coil, i.e. supplying electric power to the coil
• B60L 53/126 - Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• B60L 53/38 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Abstract

A power-transmitter control unit (70) of a power transmitter device (20) calculates an intensity of a power supply request signal based on an output signal of a power-transmitter communication coil (40), and energizes the power transmitter coil (22) when determining that the calculated intensity exceeds a determination threshold. The power transmitter device (20) includes a detection circuit (91) that measures background noise near the power transmitter coil (22). When the measured background noise is large, the power-transmitter control unit (70) sets the determination threshold to a larger value than the determination threshold when the background noise is small. When the measured background noise is large, the power-receiver control unit (230) of the power receiver device (100) sets the intensity of the power supply request signal to be larger than the intensity when the background noise is small.

IPC Classes  ?

• B60L 53/12 - Inductive energy transfer
• B60L 53/122 - Circuits or methods for driving the primary coil, i.e. supplying electric power to the coil
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/60 - Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Abstract

A system for wireless power transfer of on-road vehicles is provided herein. The system includes a plurality of base stations; a power transmission line located beneath a surface of a road having a plurality of segments, each segment having at least one pair of coils and at least one capacitor electrically connected via a switch to the coils in the segment; and at least one vehicle having at least one power receiving segment having at least two coils, connected to at least one capacitor, wherein the at least one vehicle further includes a communication transmitter configured to transmit a power requesting signal, wherein the coils of the power transmitting segment are configured to receive the power requesting signal; and wherein each of the base stations is further configured to feed a plurality of the power transmitting segments with current at a resonance frequency, responsive to the power requesting signal.

IPC Classes  ?

• B60L 5/00 - Current-collectors for power supply lines of electrically-propelled vehicles
• B60L 53/12 - Inductive energy transfer
• B60M 1/10 - Arrangements for energising and de-energising power line sections using magnetic actuation by the passing vehicle
• B60M 3/06 - Arrangements for consuming regenerative power
• B60M 7/00 - Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway
• H01F 38/14 - Inductive couplings
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H03H 7/38 - Impedance-matching networks

Abstract

The power receiver (100) includes a rectifier circuit (200) that is provided in a high voltage region and functions as a protection circuit which shorts the power receiver coil (110) to cut off power supply from the power receiver coil, an isolated power supply (360) that is provided across the high voltage region and a low voltage region and supplies power to a drive circuit (370) of the rectifier circuit, a current sensor (340) that is provided in the low voltage region and detects a current supplied from a low-voltage storage battery (302) to the isolated power supply, and a determination unit (235) that is provided in the low voltage region and determines whether the rectifier circuit is in normal operation based on the current detected by the current sensor.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• B60L 3/04 - Cutting-off the power supply under fault conditions
• B60L 53/12 - Inductive energy transfer

Abstract

A circuitry for protecting against overvoltage event at a vehicle assembly of an electric vehicle, being in communication with a ground assembly as a part of a wireless power transfer system for electric vehicles is provided herein. The circuitry for protecting against overvoltage event includes: a radio frequency (RF) transmitter to repeatedly transmit a power request signal to the ground assembly, being a modulated signal having a unique identifier of the vehicle assembly; a detection circuitry to detect an overvoltage event, across an output of the vehicle assembly; a controlled switch to divert current off the output of the vehicle assembly, into a bypass circuitry, upon detection of the overvoltage event, wherein upon receiving an indication from the detection circuitry of overvoltage event, the RF transmitter stops transmitting the power request signal to the ground assembly.

IPC Classes  ?

• B60L 53/122 - Circuits or methods for driving the primary coil, i.e. supplying electric power to the coil
• H02J 7/64 -
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices

Abstract

Method and system for protecting against unrequested power transfer transmitted by a ground assembly towards a vehicle assembly are provided herein. The system may include a circuitry for protecting against unrequested power transfer transmitted by a ground assembly towards a vehicle assembly of a vehicle having at least one motor for electric propulsion, wherein the vehicle assembly is associated with the ground assembly as a part of a wireless power transfer system for electric vehicles, and wherein the vehicle assembly includes a resonance circuitry feeding a rectifier, wherein the circuitry for protection against unrequested power transfer may include: a de-tuning circuitry configured to selectively disable the operation of the resonance circuit; and a communication circuitry for requesting power transfer from the ground assembly, wherein the de-tuning circuitry is disabling the resonance circuitry whenever the communication circuitry does not request power transfer from the ground assembly.

IPC Classes  ?

• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only

Abstract

A vehicle assembly associated with a ground assembly as a part of a wireless power transfer system for electric vehicles having a built-in test circuitry for testing a protection mechanism against overvoltage at a vehicle assembly is provided herein. The vehicle assembly may include: circuitry for testing a protection mechanism against an overvoltage event comprising a controlled switch to divert current off the output of the vehicle assembly, into a bypass circuitry, upon detection of the overvoltage event across the output of the vehicle assembly, said circuitry for testing comprising: a voltage or current source configured to apply an electrical charge into a gate of the controlled switch at a level which is sufficient to turn the controlled switch on, so as to verify that the controlled switch and the bypass circuitry serve as a shortcut of the output of the vehicle assembly.

IPC Classes  ?

• B60L 53/12 - Inductive energy transfer
• B60L 53/62 - Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
• H02J 7/64 -
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type

Abstract

A in-vehicle power receiver (100) includes a rectifier circuit (200) that functions as a protection circuit to short-circuit a power receiver coil (110) and cut off power supply from the power receiver coil, a voltage sensor (330), and a power-receiver controller (231) that implements short-circuit control using the rectifier circuit when a detected voltage of the voltage sensor is greater than or equal to a determination threshold. The determination threshold is changeable, and the power-receiver controller decreases the determination threshold and determines whether the short-circuit control is executed normally when main switches (301H, 301L) are turned on and voltage is applied from a high-voltage storage battery (300) to the power receiver before power supply from a power transmitter coil.

IPC Classes  ?

• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• B60L 3/04 - Cutting-off the power supply under fault conditions
• B60L 53/12 - Inductive energy transfer

Abstract

A power receiver (100) includes a power-receiver communication coil (170) and a power-receiver control unit (230) that controls energization of the power-receiver communication coil (170) for supply of a power supply request signal, requesting the power transmitter coil (22) to supply power, to the power-receiver communication coil (170). The power-receiver control unit (230) executes an abnormality determination process determining whether an abnormality related to wireless power transfer has occurred, and a prevention process preventing supply of the power supply request signal to the power-receiver communication coil (170) when the abnormality related to wireless power transfer is determined to have occurred.

IPC Classes  ?

• B60L 3/00 - Electric devices on electrically-propelled vehicles for safety purposesMonitoring operating variables, e.g. speed, deceleration or energy consumption
• B60L 3/04 - Cutting-off the power supply under fault conditions
• B60L 3/12 - Recording operating variables
• B60L 5/00 - Current-collectors for power supply lines of electrically-propelled vehicles
• B60L 5/42 - Current-collectors for power supply lines of electrically-propelled vehicles for collecting current from individual contact pieces connected to the power supply line
• B60L 9/08 - Electric propulsion with power supply external to the vehicle using DC motors fed from AC supply lines
• B60L 9/28 - Electric propulsion with power supply external to the vehicle using AC induction motors fed from AC supply lines polyphase motors
• B60L 50/51 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by AC-motors
• B60L 53/12 - Inductive energy transfer
• B60L 53/122 - Circuits or methods for driving the primary coil, i.e. supplying electric power to the coil
• B60L 53/126 - Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• B60L 53/30 - Constructional details of charging stations
• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/66 - Data transfer between charging stations and vehicles
• B60L 53/68 - Off-site monitoring or control, e.g. remote control
• B60L 58/12 - Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
• H01F 38/14 - Inductive couplings
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/80 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• H02M 7/219 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
• H02M 7/48 - Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
• H04B 5/26 - Inductive coupling using coils

Abstract

A system for positioning wirelessly powered or charged electric vehicles is provided herein. The system includes: a plurality of partially overlapping coils forming a power receiver segment attached to the electric vehicle; a set of two or more coils located symmetrically on the power receiver segment and connected to respective rectifiers and digital voltmeters; a set of three or more coils located along a longitudinal centre of the power receiver segment and connected to connected to respective rectifiers and digital voltmeters; a computer processor configured to receive samples from the digital voltmeters and calculate, based on calibration data, a position of the electric vehicle relative to the powers transmitting coils located below the road, wherein the calibration data map voltage values representative of magnetic flux though the set of three coils and the set of fur coils, into longitudinal and lateral displacement of the receiver segment, respectively.

IPC Classes  ?

• B60L 53/39 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles specially adapted for charging by inductive energy transfer with position-responsive activation of primary coils
• B60L 53/122 - Circuits or methods for driving the primary coil, i.e. supplying electric power to the coil
• B60L 53/36 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles by positioning the vehicle
• B60W 60/00 - Drive control systems specially adapted for autonomous road vehicles
• H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Abstract

A system for controlling a frequency of a wireless power signal transmitted from a plurality of power transmitting segments located along a road. The system may include: a plurality of base stations located along the road, wherein each base station may include, for each one of the segments: a power converter configured to convert an alternating current at a power distribution frequency; a phase detection circuitry, configured to detect a voltage-to-current phase of the powering signal on one of the segments that has been powered; and a frequency control circuitry, configured to control the power transmission frequency of the powering signal on the segment that has been powered, based on the voltage-to-current phase, so as to reduce an absolute value of a voltage-to-current phase to a predefined level as long as the power receiving coils of the electric vehicle are passing over the power transmitting segments that has been powered.

IPC Classes  ?

• B60L 53/126 - Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• B60L 53/122 - Circuits or methods for driving the primary coil, i.e. supplying electric power to the coil
• B60L 53/30 - Constructional details of charging stations
• B60L 53/65 - Monitoring or controlling charging stations involving identification of vehicles or their battery types
• B60L 53/66 - Data transfer between charging stations and vehicles
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H02J 50/90 - Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Abstract

A system and method for tailoring a receiver of an electric vehicle configured for wireless power transfer based on electric vehicle properties. The electric vehicle includes a versatile receiver where the parameters affecting the resonance such as the height of the airgap and the size and positions of the receiver coils and other properties are all factored in for selecting optimal resonance properties, mainly L and C values. The suggested design allows for a versatile receiver accommodating a wide gamut of models of electric vehicle with minimal variance of electromechanical changes.

IPC Classes  ?

• B60L 5/00 - Current-collectors for power supply lines of electrically-propelled vehicles
• B60L 53/12 - Inductive energy transfer
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H02J 50/40 - Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
• H02J 50/70 - Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields

Abstract

A system and method for protecting against overvoltage in a vehicle assembly of an electric vehicle, wherein the vehicle assembly is in communication with a ground assembly as a part of a wireless power transfer system for electric vehicles, are provided herein. The system may include: a communication unit in the vehicle assembly configured to repeatedly transmit a power request signal to the ground assembly; a protection circuitry configured to: detect an overvoltage event across an output of the vehicle assembly; and divert current off the output of the vehicle assembly, into a by-pass circuitry, upon detection of the overvoltage event, wherein upon receiving an indication from the protection circuitry of the overvoltage event, the communication unit stops transmitting the power request signal to the ground assembly

IPC Classes  ?

• B60L 5/00 - Current-collectors for power supply lines of electrically-propelled vehicles
• B60L 53/12 - Inductive energy transfer
• B60M 1/10 - Arrangements for energising and de-energising power line sections using magnetic actuation by the passing vehicle
• B60M 3/06 - Arrangements for consuming regenerative power
• B60M 7/00 - Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway
• H01F 38/14 - Inductive couplings
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H03H 7/38 - Impedance-matching networks

Abstract

A system and method for reducing harmonics in a rectified incoming wireless power transfer signal at a receiver of an electrical vehicle are provided herein. The electrical vehicle receiver shall be equipped with a two-stage filter which shall reduce the harmonics post rectifying of the alternating current inducted at the receiver coils. Advantageously, using a specially designed capacitor, an effective reduction of the harmonics is achieved for power efficiency and electromagnetic compliance (EMC). The design is challenging due to the high amperage and frequency range of the alternating current.

IPC Classes  ?

• B60L 5/00 - Current-collectors for power supply lines of electrically-propelled vehicles
• B60L 53/12 - Inductive energy transfer
• B60M 1/10 - Arrangements for energising and de-energising power line sections using magnetic actuation by the passing vehicle
• B60M 3/06 - Arrangements for consuming regenerative power
• B60M 7/00 - Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway
• H01F 38/14 - Inductive couplings
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H03H 7/38 - Impedance-matching networks

Abstract

A method and system for metering electricity transmitted to electric vehicles over a wireless power transfer system. The system may include: an electric vehicle having an energy receiver; a management unit configured to drive electrical current to an energy transmitter withing a road section having a management communication unit; and a control center having a control unit, wherein the electric vehicle is operable to receive energy, at said the energy receiver, from the energy transmitter upon an identification of the electric vehicle, wherein the control unit is configured to measure an energy input into the at least management unit and further measure distribution of the energy input into the energy transmitter, and wherein the control center is configured to calculate an energy transmitted from the energy transmitter to the electric vehicle based on distribution of the energy input and identification of the electric vehicle.

IPC Classes  ?

• B60L 53/65 - Monitoring or controlling charging stations involving identification of vehicles or their battery types
• B60L 53/66 - Data transfer between charging stations and vehicles
• H04W 4/44 - Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]

Abstract

A system for positioning wirelessly powered or charged electrical vehicle is provided herein. The system includes: a plurality of partially overlapping coils forming a power receiver segment attached to the electrical vehicle; a set of two or more coils located symmetrically on the power receiver segment and connected to respective rectifiers and digital voltmeters; a set of three or more coils located along a longitudinal centre of the power receiver segment and connected to connected to respective rectifiers and digital voltmeters; a computer processor configured to receive samples from the digital voltmeters and calculate, based on calibration data, a position of the electrical vehicle relative to the powers transmitting coils located below the road, wherein the calibration data map voltage values representative of magnetic flux though the set of three coils and the set of fur coils, into longitudinal and lateral displacement of the receiver segment, respectively.

IPC Classes  ?

• B60L 50/53 - Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells in combination with an external power supply, e.g. from overhead contact lines
• B60L 53/36 - Means for automatic or assisted adjustment of the relative position of charging devices and vehicles by positioning the vehicle
• G05D 1/00 - Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots
• B60W 60/00 - Drive control systems specially adapted for autonomous road vehicles
• H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling

Abstract

A system for controlling a frequency of a wireless power signal transmitted from a plurality of power transmitting segments located along a road. The system may include: a plurality of base stations located along the road, wherein each base station may include, for each one of the segments: a power converter configured to convert an alternating current at a power distribution frequency; a phase detection circuitry, configured to detect a voltage-to- current phase of the powering signal on one of the segments that has been powered; and a frequency control circuitry, configured to control the power transmission frequency of the powering signal on the segment that has been powered, based on the voltage-to-current phase, so as to reduce an absolute value of a voltage-to-current phase to a predefined level as long as the power receiving coils of the electric vehicle are passing over the power transmitting segments that has been powered.

IPC Classes  ?

• B60L 53/12 - Inductive energy transfer
• B60M 1/10 - Arrangements for energising and de-energising power line sections using magnetic actuation by the passing vehicle
• B60M 7/00 - Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway

Goods & Services

A system for dynamic wireless charging of electric vehicles of various types and sizes that includes an underground coils infrastructure, a management unit under or above the ground and a receiver, which minimizes the environmental effects of using electric vehicle batteries which enables the charging of several vehicles at the same time, cooperative charging, increasing the driving range, reducing the battery size, reducing charging costs and spreading the demand for electricity from the electricity grid over time and space; a system for static wireless electric charging of electric vehicles of a variety of types and sizes for electric vehicles, which includes an underground coil infrastructure, a management unit under or above the ground and a receiver, which enables electric vehicle charging at home, at the depot, at the terminal, at airports and in ports, while the electric vehicle is driving slowly and/or in a prolonged full stop and/or while it is unloading or loading; downloadable mobile application for drivers that enables live monitoring of charging and provides smart charging insights for dynamic and static wireless charging of electric vehicles and includes a component of billing according to the nature and scope of use; downloadable mobile application for technicians to provide support and resolve faults and alerts in a dynamic and static wireless charging system for electric vehicles. Non-downloadable cloud-based charging management software, for the use of vehicle fleets and for private use, which includes a component of billing according to the nature and extent of use, and allows live monitoring of dynamic and static wireless charging of electric vehicles, fault monitoring and follow-up of the repair status and the service provided to drivers by technicians in connection with the repair and which provides smart charging insights for wireless the charging system.

Goods & Services

A system for dynamic wireless charging of electric vehicles of various types and sizes that includes an underground coils infrastructure, a management unit under or above the ground and a receiver, which minimizes the environmental effects of using electric vehicle batteries which enables the charging of several vehicles at the same time, cooperative charging, increasing the driving range, reducing the battery size, reducing charging costs and spreading the demand for electricity from the electricity grid over time and space; a system for static wireless electric charging of electric vehicles of a variety of types and sizes for electric vehicles, which includes an underground coil infrastructure, a management unit under or above the ground and a receiver, which enables electric vehicle charging at home, at the depot, at the terminal, at airports and in ports, while the electric vehicle is driving slowly and/or in a prolonged full stop and/or while it is unloading or loading; downloadable mobile application for drivers that enables live monitoring of charging and provides smart charging insights for dynamic and static wireless charging of electric vehicles and includes a component of billing according to the nature and scope of use; downloadable mobile application for technicians to provide support and resolve faults and alerts in a dynamic and static wireless charging system for electric vehicles. Non-downloadable cloud-based charging management software, for the use of vehicle fleets and for private use, which includes a component of billing according to the nature and extent of use, and allows live monitoring of dynamic and static wireless charging of electric vehicles, fault monitoring and follow-up of the repair status and the service provided to drivers by technicians in connection with the repair and which provides smart charging insights for wireless the charging system.

Goods & Services

A system comprised of hardware receiver, installed on any type of vehicle, and of hardware in the nature of a charging system management unit positioned above or underground and also including underground charging coils for the dynamic wireless charging of electric vehicles, with said system minimizing environmental effects of electric vehicle batteries use by enabling simultaneous charging of several vehicles, cooperative charging, increasing the driving range of electric vehicles, reducing the battery size required for electric vehicles, reducing charging costs, and spreading the demand for electricity from the electricity grid over time and space; A system comprised of hardware receiver, installed on any type of vehicle, and of hardware in the nature of a charging system management unit positioned above or underground and also including underground charging coils for static wireless electric charging of electric vehicles, with said system enabling electric vehicle charging at home, at a charging depot, at the terminal, at airports, and in ports, all while the electric vehicle is driving slowly or at a stop; Downloadable mobile application software for drivers that enables live monitoring of charging and provides smart charging insights for dynamic and static wireless charging of electric vehicles and manages billing information according to the nature and scope of use; Downloadable mobile application software for technicians to provide support and resolve faults and alerts in a dynamic and static wireless charging system for electric vehicles Non-downloadable cloud-based charging management software, for the use of vehicle fleets and for private use, which manages metering and billing according to the nature and extent of use and also allows live monitoring of dynamic and static wireless charging of electric vehicles, provides fault-monitoring and follow-up information regarding repair status and repair services provided to drivers by technicians, with said software also providing smart charging insights for wireless the charging system

Goods & Services

A system comprised of hardware receiver, installed on any type of vehicle, and of hardware in the nature of a charging system management unit positioned above or underground and also including underground charging coils for the dynamic wireless charging of electric vehicles, with said system minimizing environmental effects of electric vehicle batteries use by enabling simultaneous charging of several vehicles, cooperative charging, increasing the driving range of electric vehicles, reducing the battery size required for electric vehicles, reducing charging costs, and spreading the demand for electricity from the electricity grid over time and space; A system comprised of hardware receiver, installed on any type of vehicle, and of hardware in the nature of a charging system management unit positioned above or underground and also including underground charging coils for static wireless electric charging of electric vehicles, with said system enabling electric vehicle charging at home, at a charging depot, at the terminal, at airports, and in ports, all while the electric vehicle is driving slowly or at a stop; Downloadable mobile application software for drivers that enables live monitoring of charging and provides smart charging insights for dynamic and static wireless charging of electric vehicles and manages billing information according to the nature and scope of use; Downloadable mobile application software for technicians to provide support and resolve faults and alerts in a dynamic and static wireless charging system for electric vehicles Non-downloadable cloud-based charging management software, for the use of vehicle fleets and for private use, which manages metering and billing according to the nature and extent of use and also allows live monitoring of dynamic and static wireless charging of electric vehicles, provides fault-monitoring and follow-up information regarding repair status and repair services provided to drivers by technicians, with said software also providing smart charging insights for wireless the charging system

Abstract

A system for wireless power transfer of on-road vehicles is provided herein. The system includes a plurality of base stations; a power transmission line located beneath a surface of a road having a plurality of segments, each segment having at least one pair of coils and at least one capacitor electrically connected via a switch to the coils in the segment; and at least one vehicle having at least one power receiving segment having at least two coils, connected to at least one capacitor, wherein the at least one vehicle further includes a communication transmitter configured to transmit a power requesting signal, wherein the coils of the power transmitting segment are configured to receive the power requesting signal; and wherein each of the base stations is further configured to feed a plurality of the power transmitting segments with current at a resonance frequency, responsive to the power requesting signal.

IPC Classes  ?

• B60L 5/00 - Current-collectors for power supply lines of electrically-propelled vehicles
• B60L 53/12 - Inductive energy transfer
• B60M 1/10 - Arrangements for energising and de-energising power line sections using magnetic actuation by the passing vehicle
• B60M 3/06 - Arrangements for consuming regenerative power
• B60M 7/00 - Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway
• H01F 38/14 - Inductive couplings
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H03H 7/38 - Impedance-matching networks

Abstract

A system and a method for validating electric vehicles in a network are provided herein. The method may include the following steps: transmitting energy from at least one road section to at least one electric vehicle; recording a magnitude of energy received by said at least one electric vehicle and transmitting a record of said magnitude of energy received for validation; recording a magnitude of energy transmitted from said at least one road section and transmitting a record of said magnitude of energy transmitted for validation; and validating energy usage of said at least one electric vehicle by periodically comparing said magnitude of energy received with said magnitude of energy transmitted to identify at least one of: component failure; and, a potential fraud. The system implements the method in a power-over-the-air network for electric vehicles.

IPC Classes  ?

• B60L 53/66 - Data transfer between charging stations and vehicles
• B60L 53/12 - Inductive energy transfer
• B60L 53/68 - Off-site monitoring or control, e.g. remote control
• B60L 53/62 - Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
• B60L 53/65 - Monitoring or controlling charging stations involving identification of vehicles or their battery types

Abstract

A system and a method for validating electric vehicles in a network are provided herein. The method may include the following steps: transmitting energy from at least one road section to at least one electric vehicle; recording a magnitude of energy received by said at least one electric vehicle and transmitting a record of said magnitude of energy received for validation; recording a magnitude of energy transmitted from said at least one road section and transmitting a record of said magnitude of energy transmitted for validation; and validating energy usage of said at least one electric vehicle by periodically comparing said magnitude of energy received with said magnitude of energy transmitted to identify at least one of: component failure; and, a potential fraud. The system implements the method in a power-over-the-air network for electric vehicles.

IPC Classes  ?

• B60L 5/00 - Current-collectors for power supply lines of electrically-propelled vehicles
• B60M 3/06 - Arrangements for consuming regenerative power
• H03H 7/38 - Impedance-matching networks

Abstract

A system for wireless power transfer of on-road vehicles is provided herein. The system includes a plurality of base stations; a power transmission line located beneath a surface of a road having a plurality of segments, each segment having at least one pair of coils and at least one capacitor electrically connected via a switch to the coils in the segment; and at least one vehicle having at least one power receiving segment having at least two coils, connected to at least one capacitor, wherein the at least one vehicle further includes a communication transmitter configured to transmit a power requesting signal, wherein the coils of the power transmitting segment are configured to receive the power requesting signal; and wherein each of the base stations is further configured to feed a plurality of the power transmitting segments with current at a resonance frequency, responsive to the power requesting signal.

IPC Classes  ?

• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• B60L 5/00 - Current-collectors for power supply lines of electrically-propelled vehicles
• B60M 3/06 - Arrangements for consuming regenerative power
• B60L 53/12 - Inductive energy transfer
• B60M 7/00 - Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway
• H01F 38/14 - Inductive couplings
• H03H 7/38 - Impedance-matching networks

Abstract

A system for wireless power transfer of on-road vehicles is provided herein. The system includes a plurality of base stations; a power transmission line located beneath a surface of a road having a plurality of segments, each segment having at least one pair of coils and at least one capacitor electrically connected via a switch to the coils in the segment; and at least one vehicle having at least one power receiving segment having at least two coils, connected to at least one capacitor, wherein the at least one vehicle further includes a communication transmitter configured to transmit a power requesting signal, wherein the coils of the power transmitting segment are configured to receive the power requesting signal; and wherein each of the base stations is further configured to feed a plurality of the power transmitting segments with current at a resonance frequency, responsive to the power requesting signal.

IPC Classes  ?

• B60L 5/00 - Current-collectors for power supply lines of electrically-propelled vehicles
• B60M 3/02 - Feeding power to the supply lines in contact with collector on vehiclesArrangements for consuming regenerative power with means for maintaining voltage within a predetermined range
• H03H 7/38 - Impedance-matching networks

Abstract

A system for wireless power transfer of on-road vehicles is provided herein. The system includes a plurality of base stations; a power transmission line located beneath a surface of a road having a plurality of segments, each segment having at least one pair of coils and at least one capacitor electrically connected via a switch to the coils in the segment; and at least one vehicle having at least one power receiving segment having at least two coils, connected to at least one capacitor, wherein the at least one vehicle further includes a communication transmitter configured to transmit a power requesting signal, wherein the coils of the power transmitting segment are configured to receive the power requesting signal; and wherein each of the base stations is further configured to feed a plurality of the power transmitting segments with current at a resonance frequency, responsive to the power requesting signal.

IPC Classes  ?

• B60L 11/18 - using power supplied from primary cells, secondary cells, or fuel cells
• B60L 5/00 - Current-collectors for power supply lines of electrically-propelled vehicles
• B60M 3/06 - Arrangements for consuming regenerative power
• B60M 7/00 - Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway
• H02J 50/12 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
• H01F 38/14 - Inductive couplings
• H03H 7/38 - Impedance-matching networks
• B60L 53/12 - Inductive energy transfer

Abstract

A system and method for powering an electric vehicle on a road, the system comprising a generator configured to produce power, an inductive accumulator array for installation in a road configured to receive power from the generator, a receiver array of receiver coils for installation beneath a vehicle, each coil being configured to receive power from a corresponding accumulator coil installed in a road, wherein said receiver array is configured to provide excess power back to the accumulator coils, said excess power being providable to other vehicles by the accumulator array. The system further comprises a vehicle communications coil for location in a vehicle in front of the receiver array in the driving direction of the vehicle, and an accumulator communications unit configured to receive a signal from said vehicle communications coil and to operate corresponding accumulator sections to provide power to a receiver attached to the vehicle.

IPC Classes  ?

• B60L 5/00 - Current-collectors for power supply lines of electrically-propelled vehicles
• B60M 3/06 - Arrangements for consuming regenerative power
• B60M 7/00 - Power lines or rails specially adapted for electrically-propelled vehicles of special types, e.g. suspension tramway, ropeway, underground railway