Abstract

A monitoring system for monitoring condition of one or more safety bearings (110) of a magnetically levitated object (107) comprises sensor equipment (101) for producing a sensor signal indicative of movement of the magnetically levitated object, a memory (102), and a data processing system (103) configured to: record, to the memory, waveform samples of the sensor signal in drop situations in which magnetic levitation of the object stops and the object falls from a magnetically levitated position onto the one or more safety bearings, and to form a condition indicator of the safety bearings based on differences between the waveform samples recorded in different ones of the drop situations. Thus, the status of the one or more safety bearings is evaluated based on comparing historical records of drop situations.

IPC Classes  ?

• F16C 32/04 - Bearings not otherwise provided for using magnetic or electric supporting means
• G01M 13/04 - Bearings

Abstract

There is provided a controller for magnetic levitation equipment comprising a plurality of current source modules for connecting to at least one power supply for direct current, DC, and said current source modules comprising current channels for actuating coils of the magnetic levitation equipment, and a controller device connected to the current source modules by a control connection for controlling switching of electric current by the current source modules to the current channels. The current source modules combine discrete components for amplifying and switching electric current to the current channels into a single package. In this way, manufacturing and maintenance of the controller is facilitated, since manufacturing and maintenance may be based on the current source modules instead of discrete components, e.g. gate drivers, IGBTs, power mosfets and diodes.

IPC Classes  ?

• F16C 32/04 - Bearings not otherwise provided for using magnetic or electric supporting means

Abstract

There is provided a controller for magnetic levitation equipment comprising a plurality of current source modules for connecting to at least one power supply for direct current, DC, and said current source modules comprising current channels for actuating coils of the magnetic levitation equipment, and a controller device connected to the current source modules by a control connection for controlling switching of electric current by the current source modules to the current channels. The current source modules combine discrete components for amplifying and switching electric current to the current channels into a single package. In this way, manufacturing and maintenance of the controller is facilitated, since manufacturing and maintenance may be based on the current source modules instead of discrete components, e.g. gate drivers, IGBTs, power mosfets and diodes.

IPC Classes  ?

• F16C 32/04 - Bearings not otherwise provided for using magnetic or electric supporting means

Abstract

A control system for controlling a magnetic suspension system includes sensors configured to produce position signals indicative of a position of an object to be magnetically levitated, and a controller configured to control, in accordance with the position signals, electric currents supplied to magnetic actuators of the magnetic suspension system to magnetically levitate the object. The control system includes a computing system configured to maintain and update a computational model of the magnetic suspension system based on identification runs where identification run signals are supplied to the magnetic actuators of the magnetic suspension system and responses to the identification run signals are detected from the sensors and/or the magnetic actuators. The computing system is configured to compare quantities related to the computational model to quantities related to the magnetic suspension system to reveal deviations from the expected operational conditions of the magnetic suspension system.

IPC Classes  ?

• F16C 32/04 - Bearings not otherwise provided for using magnetic or electric supporting means

Abstract

A monitoring system for monitoring condition of one or more safety bearings (110) of a magnetically levitated object (107) comprises sensor equipment (101 ) for producing a sensor signal indicative of movement of the magnetically levitated object, a memory (102), and a data processing system (103) configured to: record, to the memory, waveform samples of the sensor signal in drop situations in which magnetic levitation of the object stops and the object falls from a magnetically levitated position onto the one or more safety bearings, and to form a condition indicator of the safety bearings based on differences between the waveform samples recorded in different ones of the drop situations. Thus, the status of the one or more safety bearings is evaluated based on comparing historical records of drop situations.

IPC Classes  ?

• F16C 32/04 - Bearings not otherwise provided for using magnetic or electric supporting means
• F16C 39/02 - Relieving load on bearings using mechanical means

Abstract

There is provided a controller for magnetic levitation equipment comprising a plurality of current source modules for connecting to at least one power supply for direct current, DC, and said current source modules comprising current channels for actuating coils of the magnetic levitation equipment, and a controller device connected to the current source modules by a control connection for controlling switching of electric current by the current source modules to the current channels. The current source modules combine discrete components for amplifying and switching electric current to the current channels into a single package. In this way, manufacturing and maintenance of the controller is facilitated, since manufacturing and maintenance may be based on the current source modules instead of discrete components, e.g. gate drivers, IGBTs, power mosfets and diodes.

IPC Classes  ?

• F16C 32/04 - Bearings not otherwise provided for using magnetic or electric supporting means

Abstract

A control system for controlling a magnetic suspension system includes controllers each being configured to control one or more of magnetic actuators magnetically levitating an object. One of the controllers is configured to operate as a master controller and other one or ones of the controllers are configured to operate as one or more slave controllers. The master controller is communicatively connected with one or more digital data transfer links to the one or more slave controllers and configured to control operation of the one or more slave controllers. The control system makes it possible to implement a centralized control with separate controllers, and thereby without a need for a controller having a high number of controller current sources.

IPC Classes  ?

• H02K 7/09 - Structural association with bearings with magnetic bearings
• F16C 32/04 - Bearings not otherwise provided for using magnetic or electric supporting means
• H01F 7/20 - ElectromagnetsActuators including electromagnets without armatures

Abstract

A magnetic actuator for a magnetic suspension system includes a core section having an annular yoke and radially directed teeth joining the yoke. The magnetic actuator includes coils surrounding the teeth and a mechanical structure having a first section and a second section. The first section is attached to the yoke and conducts magnetic flux axially. The second section joins the first section and conducts the magnetic flux radially in a direction opposite to a direction of the magnetic flux in the teeth. The magnetic actuator includes a mechanical safety bearing that is between the second section and the teeth. Thus, the safety bearing is in a room surrounded by a magnetic flux circulation path. Therefore, the safety bearing does not increase an axial length of the magnetic suspension system.

IPC Classes  ?

• H01F 7/20 - ElectromagnetsActuators including electromagnets without armatures

Abstract

A control system for controlling a magnetic suspension system comprises sensors (101) configured to produce position signals indicative of a position of an object (102) to be magnetically levitated, and a controller (103) configured to control, in accordance with the position signals, electric currents supplied to magnetic actuators of the magnetic suspension system to magnetically levitate the object. The control system comprises a computing system (104) configured to maintain and update a computational model of the magnetic suspension system based on identification runs where identification run signals are supplied to the magnetic actuators of the magnetic suspension system and responses to the identification run signals are detected from the sensors and/or the magnetic actuators. The computing system is configured to compare quantities related to the computational model to quantities related to the magnetic suspension system to reveal deviations from the expected operational conditions of the magnetic suspension system.

IPC Classes  ?

• F16C 32/04 - Bearings not otherwise provided for using magnetic or electric supporting means

Abstract

There is provided a controller for magnetic levitation equipment comprising a plurality of current source modules for connecting to at least one power supply for direct current, DC,and said current source modules comprising current channels for actuating coils of the magnetic levitation equipment, and a controller device connected to the current source modules by a control connection for controlling switching of electric current by the currentsource modules to the current channels. The current source modules combine discrete components for amplifying and switching electric current to the current channels into a single package. In this way, manufacturing and maintenance of the controller is facilitated,since manufacturing and maintenance may be based on the current source modules instead of discrete components, e.g. gate drivers, IGBTs, power mosfets and diodes.

IPC Classes  ?

• F16C 32/04 - Bearings not otherwise provided for using magnetic or electric supporting means

Abstract

A control system for controlling a magnetic suspension system comprises controllers (101, 102) each being configured to control one or more of magnetic actuators (108-111) magnetically levitating an object (113). One of the controllers is configured to operate as a master controller and other one or ones of the controllers are configured to operate as one or more slave controllers. The master controller is communicatively connected with one or more digital data transfer links (104) to the one or more slave controllers and configured to control operation of the one or more slave controllers. The control system makes it possible to implement a centralized control with separate controllers, and thereby without a need for a controller having a high number of controller current sources.

IPC Classes  ?

• F16C 32/04 - Bearings not otherwise provided for using magnetic or electric supporting means

Abstract

A magnetic actuator for a magnetic suspension system comprises a core section (101) having an annular yoke (102) and radially directed teeth (103) joining the yoke. The magnetic actuator comprises coils (104) surrounding the teeth and a mechanical structure having a first section (105) and a second section (106). The first section is attached to the yoke and conducts magnetic flux axially. The second section joins the first section and conducts the magnetic flux radially in a direction opposite to a direction of the magnetic flux in the teeth. The magnetic actuator comprises a mechanical safety bearing (107) that is between the second section and the teeth. Thus, the safety bearing is in a room surrounded by a magnetic flux circulation path. Therefore, the safety bearing does not increase an axial length of the magnetic suspension system.

IPC Classes  ?

• F16C 32/04 - Bearings not otherwise provided for using magnetic or electric supporting means
• F16C 39/02 - Relieving load on bearings using mechanical means
• H02K 7/09 - Structural association with bearings with magnetic bearings

Goods & Services

Electronic control units, not for vehicles.

Abstract

A rotor assembly for an axial magnetic bearing includes a shaft portion and a disc attached to the shaft portion. The disc includes a conical surface on a portion reaching radially from the aperture of the disc a distance away from the aperture. A fastening mechanism includes an aperture for the shaft portion so that the fastening mechanism includes a conical surface matching the conical surface of the disc. The fastening mechanism and the shaft portion are shaped to enable the fastening mechanism to be tightened axially against the conical surface of the disc so as to arrange the conical surface of the fastening mechanism to press the conical surface of the disc towards the center line of the shaft portion. Thus, the fastening mechanism acts against the centrifugal force and keeps the disc centric placed.

IPC Classes  ?

• H02K 7/09 - Structural association with bearings with magnetic bearings
• F16C 32/04 - Bearings not otherwise provided for using magnetic or electric supporting means