A power electronics unit for driving an electric machine excited by permanent magnets and including a rotor and a stator having at least one stator winding, comprising at least one power switch designed to drive the stator winding, and an overvoltage protection device to protect the power switch from overvoltage. The overvoltage protection device comprises a phase voltage detecting device associated with the power switch as well as a short-circuit switching circuit which, when a predetermined phase voltage threshold value of the phase voltage detected by the phase voltage detection device is reached or exceeded, is adapted to be activated for short-circuiting the stator winding associated with the power switch. The short-circuit switching circuit comprises the power switch designed to drive the stator winding.
H02H 7/09 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against over-voltageEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against reduction of voltageEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against phase interruption
H02P 29/40 - Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load
H02M 1/32 - Means for protecting converters other than by automatic disconnection
H02H 7/08 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
H02H 7/122 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters
H02P 6/182 - Circuit arrangements for detecting position without separate position detecting elements using back-emf in windings
H02P 29/10 - Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors for preventing overspeed or under speed
2.
STATOR OF AN ELECTRICAL MACHINE, AND ELECTRICAL MACHINE COMPRISING SUCH A STATOR
The invention relates to a stator (100) of an electrical machine, comprising a plurality of stator teeth (110) arranged around a stator periphery which is adjacent to an air gap, every two adjacent stator teeth being separated by a stator slot (115); the stator slot comprising a slot base (150) and a side (140) of an adjacent stator tooth; said stator being ឬbᡶcharacterised in thatឬ/bᡶ a connecting region between the side of the stator tooth and the slot base has an oval-shaped slot base-inner corner curve (161, 162, 163), said slot base-inner corner curve extending concavely from the slot base towards the side of the stator tooth.
H02K 3/34 - Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
3.
ROTOR FOR AN ELECTRIC MACHINE EXCITED BY A PERMANENT MAGNET
The present invention relates to a rotor (10) for an electric machine (100) excited by a permanent magnet, comprising a plurality of permanent magnets (18), which form a plurality of rotor poles arranged around a circumference of the rotor (10) adjacent to an air gap (102) in the electric machine (100), wherein: the permanent magnets (18) are designed as permanent magnets embedded in a rotor body (16); each rotor pole comprises two permanent magnets (18) arranged in a V-shape with respect to one another; each of the two permanent magnets (18) forms one leg of the V; the two permanent magnets (18) of each rotor pole face one another at an end remote from the air gap (102) and extend away from each other at an opposite end closer to the air gap (102); and the rotor body (16) comprises at least one recess (24) opening into the air gap (102).
The present invention relates to a power electronics unit (10) for driving an electrical machine with permanent-magnet excitation and comprising a rotor and a stator which has at least one stator winding (12A, 12B, 12C), having at least one circuit breaker (30A, 32A, 30B, 32B, 30C, 32C) which is designed to drive the stator winding (12A, 12B, 12C), and an overvoltage protection device for protecting the circuit breaker (30A, 32A, 30B, 32B, 30C, 32C) against overvoltage. The overvoltage protection device has a phase voltage detection device (38A, 38B, 38C), which is associated with the circuit breaker (30A, 32A, 30B, 32B, 30C, 32C), and also a short-circuit switching device which, when a prespecified phase voltage threshold value of the phase voltage which is detected by the phase voltage detection device (38A, 38B, 38C) is reached or exceeded, can be activated for short-circuiting the stator winding (12A, 12B, 12C) which is associated with the circuit breaker (30A, 32A, 30B, 32B, 30C, 32C). The short-circuit switching device has the circuit breaker (30A, 32A, 30B, 32B, 30C, 32C) which is designed for driving the stator winding (12A, 12B, 12C).
H02H 7/122 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters
H02P 29/00 - Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
H02M 1/32 - Means for protecting converters other than by automatic disconnection
H02H 7/08 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
H02M 1/08 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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
H02M 7/797 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with 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
H02M 7/44 - Conversion of DC power input into AC power output without possibility of reversal by static converters
6.
Wheel drive unit for attachment to an aircraft running gear
Wheel drive unit for attachment to an aircraft running gear, said wheel drive unit including a drive motor or a drive motor with subsequent transmission and comprising the following features: (a) a mounting component adapted to be mounted to a supporting component of the aircraft running gear; (b) a coupling component releasably anchored to the mounting component in non-rotatable fashion; (c) the drive motor being supported by means of the coupling component such that the coupling component provides for torque support of the drive motor; (d) and a pluggable connection for connecting at least one pair of electric line sections and/or at least one pair of fluid line sections; (e) the torque output of the drive motor or of the subsequent transmission being adapted to establish a torque-transmitting connection to a wheel of the aircraft running gear when the wheel drive unit is attached to the aircraft running gear; (f) and the wheel drive unit—without the mounting component—, when the anchoring to the mounting component is released, being demountable from the aircraft running gear which also separates the two parts of the pluggable connection from each other.
A drive unit for an aircraft ground wheel associated with a brake unit for braking the ground wheel includes: a driving motor drivingly coupleable to the ground wheel; and a cooling system including at least a drive cooling unit configured to generate a drive cooling air stream for cooling the drive unit and a brake cooling unit configured to generate a brake cooling air stream by sucking in air from the brake unit. A method of controlling such drive unit in which the cooling system is driven by the driving motor of the drive unit includes: decoupling the driving motor from the ground wheel and increasing the rotational speed of the driving motor to increase the amount of generated drive cooling air, when an operating condition of the ground wheel and/or of the drive unit is switched from a propulsion mode to a non-propulsion mode.
A galvanically isolated DC/DC converter includes a first and a second side converter circuit coupled between a pair of first side DC terminals and a pair of second side DC terminals, respectively. The first side converter circuit has a first and a second switching element, each including a switch and a diode. When the DC/DC converter is in power transfer operation from the second side DC terminals to the first side DC terminals, the second side converter circuit alternates between two power transfer states. A conductive state of the diode of one of the first and second switching elements is the result of one of the two power transfer states. The first side converter circuit is controlled such that the switch of the respectively other of the first and second switching elements is closed for an adaptation interval before the one of the two power transfer states starts.
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
10.
Galvanically isolated DC/DC converter and method of controlling a galvanically isolated DC/DC converter
A galvanically isolated DC/DC converter includes at least one first side converter circuit coupled between a pair of first side DC terminals, and at least one second side converter circuit coupled between a pair of second side DC terminals. The second side converter circuit has at least a first and a second switching element, each including a switch and a diode connected in parallel. When the DC/DC converter is in power transfer operation from the pair of first side DC terminals to the pair of second side DC terminals, the diodes of the first and second switching elements are alternately in a conductive state, with each of the first and second switching elements being controlled such that a closed state of the respective switch extends beyond a transitioning of the diode of the same switching element from the conductive state to a blocking state.
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
11.
WHEEL DRIVE UNIT FOR ATTACHMENT TO AN AIRCRAFT RUNNING GEAR
Wheel drive unit for attachment to an aircraft running gear, said wheel drive unit including a drive motor (22) or a drive motor (22) with subsequent transmission (24) and comprising the following features: a mounting component (10) adapted to be mounted to a supporting component of the aircraft running gear; a coupling component (14) releasably anchored to the mounting component (10) in non-rotatable fashion; the drive motor being supported by means of the coupling component (14) such that the coupling component (14) provides for torque support of the drive motor; a pluggable connection (60) for connecting at least one pair of electric line sections and/or at least one pair of fluid line sections; the torque output of the drive motor (22) or of the subsequent transmission (24) being adapted to establish a torque-transmitting connection to a wheel (8) of the aircraft running gear when the wheel drive unit is attached to the aircraft running gear; the wheel drive unit - without the mounting component - when the anchoring to the mounting component (10) is released, being demountable from the aircraft running gear which also separates the two parts of the pluggable connection (60) from each other.
A drive unit (40) for an aircraft ground wheel (Ί 2) associated with a brake unit (30) for braking the ground wheel (12) is disclosed, the drive unit (40) comprising a driving motor (42) being drivingly coupleable to the ground wheel (12); and a cooling system including at least a drive cooling unit (52) being configured to generate a drive cooling air stream (54) for cooling the drive unit (40) and a brake cooling unit (62, 70; 72, 74) configured to generate a brake cooling air stream (64) by sucking in air from the brake unit (30). Further disclosed is a method of controlling such drive unit (40) in which the cooling system is driven by the driving motor (42) of the drive unit (40), the method comprising decoupling the driving motor (42) from the ground wheel (12) and increasing the rotational speed of the driving motor (42) to increase the amount of generated drive cooling air (54), when an operating condition of the ground wheel (12) and/or of the drive unit (40) is switched from a propulsion mode to a non-propulsion mode.
A permanent magnet excited electric machine comprises a stator part and a moving part that is movable in relation to the stator part, one of said stator and moving parts having an electric winding system in the form of a single or multiple 3 -phase system, and the other one of said stator and moving parts having permanent magnets. The permanent magnet excited electric machine is designed for a rated power in the range between 100 kW and 20 MW, and the winding system has an inductance such that the related total reactance xB during rated operation according to xB = ωΒ · LY · PB/(Z3P · Ui,B2) is at least 0.8. In said equation ωΒ is the electric angular frequency of the winding system during rated operation, LY is the phase inductance of the winding system in star connection, PB is the power of the machine during rated operation, Z3P is the number of 3-phase systems of the machine, and Ui,B is the amount of the induced conductor voltage during rated operation. The winding system is connected in the form of a delta connection, thus reducing the power loss in this type of machine.
The invention relates to a method of producing a rotor (10) of an electric machine, the rotor (10) comprising a rotor body (14) adapted to be rotated about a rotor axis (A) as well as at least one rotor component (16) to be mounted to the rotor body (14), said method comprising the steps of: arranging the rotor component (16) on the rotor body (14) and winding a wire-like structure (20) around an outer circumference (12) of the rotor body having the rotor component (16) arranged thereon so as to form a bandage (18), with the wire-like structure (20) during winding thereof being held under an adjustable bias.
H02K 15/03 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
A galvanically isolated DC/DC converter (2) comprises at least one first side converter circuit (20) coupled between a pair of first side DC terminals (10), the first side converter circuit (20) having at least a first and a second switching element (20a, 20b), with each of the first and second switching elements (20a, 20b) comprising a switch (22, 24) and a diode (23, 25) connected in parallel, and at least one second side converter circuit (40) coupled between a pair of second side DC terminals (60), wherein, when the DC/DC converter (2) is in power transfer operation from the pair of second side DC terminals (60) to the pair of first side DC terminals (10), the second side converter circuit (40) is adapted to alternate between two power transfer states, wherein a conductive state of the diode of one of the first and second switching elements (20a, 20b) is the result of one of the two power transfer states, with the first side converter circuit (20) being controlled such that the switch of the respectively other of the first and second switching elements (20a, 20b) is closed for an adaptation interval (TP) prior to a beginning of the one of the two power transfer states.
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
16.
GALVANICALLY ISOLATED DC/DC CONVERTER AND METHOD OF CONTROLLING A GALVANICALLY ISOLATED DC/DC CONVERTER
A galvanically isolated DC/DC converter (2) comprises at least one first side converter circuit (20) coupled between a pair of first side DC terminals (10), and at least one second side converter circuit (40) coupled between a pair of second side DC terminals (60), the second side converter circuit having at least a first and a second switching element (41, 45), with each of the first and second switching elements (41, 45) comprising a switch (42, 46) and a diode (44, 48) connected in parallel, wherein, when the DC/DC converter (2) is in power transfer operation from the pair of first side DC terminals (10) to the pair of second side DC terminals (60), the diodes (44, 48) of the first and second switching elements (41, 45) are alternately in a conductive state, with each of the first and second switching elements being controlled such that a closed state of the respective switch extends beyond a transitioning of the diode of the same switching element from the conductive state to a blocking state.
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
A drive unit (16) for an aircraft running gear (2) having at least a first wheel (4) and a second wheel (6) on a common wheel axis (A), wherein the drive unit (16) is drivingly coupleable to at least one of the first and second wheels (4, 6), is characterized in that the drive unit (16) comprises at least one power output assembly (122, 124) for driving at least one of the first and second wheels (4, 6), with each of the at least one power output assembly (122, 124) comprising a power transmission chain (136) selectively engageable with a sprocket element (108, 110) coupled to one of the first and second wheels (4, 6).
An electric machine comprises a rotor (200) equipped with permanent magnets (204, 206, 208, 210), and a stator (100) equipped with electromagnetic poles. The electric machine is characterized in that several adjacent electromagnetic poles respectively constitute an electromagnetic pole group in which the adjacent electromagnetic poles are spaced apart at a first electromagnetic pole spacing, that adjacent electromagnetic poles belonging to different electromagnetic pole groups are spaced apart at an electromagnetic pole spacing greater than said first electromagnetic pole spacing, that each electromagnetic pole group has an even number of electromagnetic poles, and that adjacent electromagnetic poles of an electromagnetic pole group are linked to each other so as to generate magnetic fields of opposite direction in operation.
H02K 21/16 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
A DC/AC converter (2) comprises a DC/DC conversion stage (4) with galvanic isolation and a DC/AC conversion stage (6), wherein the DC/DC conversion stage (4) comprises a pair of first side terminals (10) providing or receiving a first DC voltage, a pair of second side terminals (12) providing or receiving a second DC voltage and coupled to the DC/AC conversion stage (6), at least one first side converter circuit (20, 22) coupled between the pair of first side terminals (10), a series connection of a plurality of second side converter circuits (30, 32) coupled between the pair of second side terminals (12), and at least one transformer circuit (40, 44) coupling the plurality of second side converter circuits (30, 32) to the at least one first side converter circuit (20, 22), wherein a connection point (34) between two of the plurality of second side converter circuits is coupled to the DC/AC conversion stage (6) and forms a neutral phase point thereof.
H02M 7/797 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with 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
A method of controlling a DC/AC converter (2) comprises the steps of (a) providing a desired AC side reference value (VAmp); (b) setting a reference correction value (VAmp.corr.1); (c) calculating an AC side reference signal (VAc.set.1) as a function of the desired AC side reference value (VAmp) and the reference correction value (VAmp.corr.1); (d) obtaining an actual AC side signal (VAc.Act.1); and (e) calculating a converter control signal (MAc.1) as a function of the AC side reference signal (VAc.set.1) and the actual AC side signal (VAC,Act.1); wherein the setting of the reference correction value (VAmp.corr.1) is based on a relation of the desired AC side reference value (VAmp) and the actual AC side signal (VAc.Act.1).
H02M 7/797 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with 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
A drive system (DS) for a land craft comprises a machine system (M1, M2) for driving the land craft, the machine system comprising at least a first and a second electric machine (M1, M2) acting on a common drive shaft (S) for driving the land craft, and a control device (PE, PE1, PE2) which is adapted to control the machine system for operating in at least two rotating speed operation ranges (OR1, OR2) with different rotating speeds of the drive shaft (S). The first electric machine (Ml) is controlled to operate in both rotating speed operation ranges (OR1, OR2) to provide a first drive torque, and the second electric machine (M2) is controlled to operate in only one of the rotating speed operation ranges (OR1) to provide a second drive torque in addition to the first drive torque.
H02P 5/46 - Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
H02K 16/02 - Machines with one stator and two rotors
A drive unit (16) for an aircraft running gear (2) having at least a first wheel (4) and a second wheel (6) on a common wheel axis (A) is characterized in that the drive unit (16) is drivingly coupleable to the first and second wheels (4, 6) such that a direction of longitudinal extension (C) of the drive unit (16) is in a plane orthogonal to the common wheel axis (A).
An electric machine comprises a rotor (200) equipped with permanent magnets (204, 206, 208, 210), and a stator (100) equipped with electromagnetic poles. The electric machine is characterized in that several adjacent electromagnetic poles respectively constitute an electromagnetic pole group in which the adjacent electromagnetic poles are spaced apart at a first electromagnetic pole spacing, that adjacent electromagnetic poles belonging to different electromagnetic pole groups are spaced apart at an electromagnetic pole spacing greater than said first electromagnetic pole spacing, that each electromagnetic pole group has an even number of electromagnetic poles, and that adjacent electromagnetic poles of an electromagnetic pole group are linked to each other so as to generate magnetic fields of opposite direction in operation.
H02K 21/16 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
A method for controlling a synchronous electric machine (2) comprising a stator and a rotor encompasses the following steps: the machine (2) is operated at a deceleration moment (MP) such that a rotor speed of the machine is reduced; the rotor movement of the machine is monitored, and when a rotation in the opposite direction or a rotor speed (v) of nearly zero with a transition into a blocked mode is detected, at least one electric input variable (I; iu, iv, iw) of an electric stator system of the machine is adjusted in such a way that an effective internal moment (MB) of the machine is generated at the beginning of the blocked mode, said internal moment (MB) being smaller than the deceleration moment (MP). The electric input variable (I; iu, iv, iw) is adjusted in this way until a stable equilibrium between an external moment (MA) affecting the machine and the internal moment (MB) has been reached by moving the rotor and under the influence of said external moment (MA).
H02P 3/24 - Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an AC motor by applying DC to the motor
B60L 15/02 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train characterised by the form of the current used in the control circuit
B60L 15/20 - Methods, circuits or devices for controlling the propulsion of electrically-propelled vehicles, e.g. their traction-motor speed, to achieve a desired performanceAdaptation of control equipment on electrically-propelled vehicles for remote actuation from a stationary place, from alternative parts of the vehicle or from alternative vehicles of the same vehicle train for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
A power electronics unit for driving an electric machine excited by permanent magnets and including a rotor and a stator having at least one stator winding, comprising at least one power switch designed to drive the stator winding, and an overvoltage protection device to protect the power switch from overvoltage. The overvoltage protection device comprises a phase voltage detecting device associated with the power switch as well as a short-circuit switching circuit which, when a predetermined phase voltage threshold value of the phase voltage detected by the phase voltage detection device is reached or exceeded, is adapted to be activated for short-circuiting the stator winding associated with the power switch. The short- circuit switching circuit comprises the power switch designed to drive the stator winding.
H02H 7/08 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
H02H 7/122 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters
H02M 1/32 - Means for protecting converters other than by automatic disconnection
H02P 29/00 - Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
26.
GALVANICALLY ISOLATED DC/DC CONVERTER AND METHOD OF CONTROLLING A GALVANICALLY ISOLATED DC/DC CONVERTER
A galvanically isolated DC/DC converter (2) comprises at least one first side converter circuit (20) coupled between a pair of first side DC terminals (10), the first side converter circuit (20) having at least a first and a second switching element (20a, 20b), with each of the first and second switching elements (20a, 20b) comprising a switch (22, 24) and a diode (23, 25) connected in parallel, and at least one second side converter circuit (40) coupled between a pair of second side DC terminals (60), wherein, when the DC/DC converter (2) is in power transfer operation from the pair of second side DC terminals (60) to the pair of first side DC terminals (10), the second side converter circuit (40) is adapted to alternate between two power transfer states, wherein a conductive state of the diode of one of the first and second switching elements (20a, 20b) is the result of one of the two power transfer states, with the first side converter circuit (20) being controlled such that the switch of the respectively other of the first and second switching elements (20a, 20b) is closed for an adaptation interval (T P) prior to a beginning of the one of the two power transfer states.
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
27.
GALVANICALLY ISOLATED DC/DC CONVERTER AND METHOD OF CONTROLLING A GALVANICALLY ISOLATED DC/DC CONVERTER
A galvanically isolated DC/DC converter (2) comprises at least one first side converter circuit (20) coupled between a pair of first side DC terminals (10), and at least one second side converter circuit (40) coupled between a pair of second side DC terminals (60), the second side converter circuit having at least a first and a second switching element (41, 45), with each of the first and second switching elements (41, 45) comprising a switch (42, 46) and a diode (44, 48) connected in parallel, wherein, when the DC/DC converter (2) is in power transfer operation from the pair of first side DC terminals (10) to the pair of second side DC terminals (60), the diodes (44, 48) of the first and second switching elements (41, 45) are alternately in a conductive state, with each of the first and second switching elements being controlled such that a closed state of the respective switch extends beyond a transitioning of the diode of the same switching element from the conductive state to a blocking state.
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
28.
DC/AC CONVERTER AND METHOD OF CONTROLLING A DC/AC CONVERTER
A DC/AC converter (2) comprises a DC/DC conversion stage (4) with galvanic isolation and a DC/AC conversion stage (6), wherein the DC/DC conversion stage (4) comprises a pair of first side terminals (10) providing or receiving a first DC voltage, a pair of second side terminals (12) providing or receiving a second DC voltage and coupled to the DC/AC conversion stage (6), at least one first side converter circuit (20, 22) coupled between the pair of first side terminals (10), a series connection of a plurality of second side converter circuits (30, 32) coupled between the pair of second side terminals (12), and at least one transformer circuit (40, 44) coupling the plurality of second side converter circuits (30, 32) to the at least one first side converter circuit (20, 22), wherein a connection point (34) between two of the plurality of second side converter circuits is coupled to the DC/AC conversion stage (6) and forms a neutral phase point thereof.
H02M 7/797 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with 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
A method of controlling a DC/AC converter (2) comprises the steps of (a) providing a desired AC side reference value (VAmp); (b) setting a reference correction value (VAmp.corr.1); (c) calculating an AC side reference signal (VAc.set.1) as a function of the desired AC side reference value (VAmp) and the reference correction value (VAmp.corr.1); (d) obtaining an actual AC side signal (VAc.Act.1); and (e) calculating a converter control signal (MAc.1) as a function of the AC side reference signal (VAc.set.1) and the actual AC side signal (VAC,Act.1); wherein the setting of the reference correction value (VAmp.corr.1) is based on a relation of the desired AC side reference value (VAmp) and the actual AC side signal (VAc.Act.1).
H02M 7/797 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with 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
patents
