The present disclosure provides a power supply system for a magnetic bearing and a control method therefor. The system includes a rectifying and filtering circuit configured to rectify and filter an alternating current to obtain a first direct current with a first DC bus voltage, the first direct current being configured to supply power to an electric motor controller of an electric motor to which the magnetic bearing belongs; a power obtaining circuit configured to obtain a second direct current with a second DC bus voltage from the first direct current, the second DC bus voltage being within an input voltage range allowed by the DC-DC power supply; a DC-DC power supply configured to convert the second direct current to a third direct current with a third DC bus voltage, the third direct current being configured to supply power to a bearing controller of the magnetic bearing.

The present disclosure provides a power supply system for a magnetic bearing and a control method therefor. The system includes a rectifying and filtering circuit configured to rectify and filter an alternating current to obtain a first direct current with a first DC bus voltage, the first direct current being configured to supply power to an electric motor controller of an electric motor to which the magnetic bearing belongs; a power obtaining circuit configured to obtain a second direct current with a second DC bus voltage from the first direct current, the second DC bus voltage being within an input voltage range allowed by the DC-DC power supply; a DC-DC power supply configured to convert the second direct current to a third direct current with a third DC bus voltage, the third direct current being configured to supply power to a bearing controller of the magnetic bearing.

Various embodiments of a system and method for controlling the shape, subdivision, recombination, movement and object manipulation of ferrofluid material in addition to pumping fluids with ferrofluid material using external electromagnetic fields are disclosed herein.

Various embodiments of a system and method for controlling the shape, subdivision, recombination, movement and object manipulation of ferrofluid material in addition to pumping fluids with ferrofluid material using external electromagnetic fields are disclosed herein.

A magnetic end effector utilizing a switchable Halbach array includes a pair of opposing members that can move towards and away from each other. The switchable Halbach arrays are located on or near the inner surface of the opposing members. A mechanical switching system is used to control the switchable Halbach arrays by moving one or more magnets that make up the switchable Halbach arrays. When manipulated in a certain way, the switchable Halbach arrays cause the opposing members to move towards each other, and when manipulate in a different manner, cause the opposing members to move away from each other.

A magnetic bearing vacuum pump comprises: a first displacement signal generation section configured to amplify, by a resolution multiplying factor K of K>1, a displacement modulated wave signal modulated according to a displacement of the rotor from a predetermined position to generate a high-resolution displacement signal in a first displacement region including the predetermined position; a second displacement signal generation section configured to generate a low-resolution displacement signal in a larger second displacement region including the first displacement region; a selection section configured to select either one of the high-resolution displacement signal or the low-resolution displacement signal based on an unsteady-state response signal obtained by excluding a steady-state whirling displacement component from the high-resolution displacement signal or the low-resolution displacement signal; and a bearing control section configured to control the magnetic bearing based on the displacement signal selected by the selection section.

The present invention relates to an electrical device comprising: a first connector (102) being magnetically connectable to a second connector (202) of an accessory (200) for forming a magnetic connection between the first and second connectors, wherein at least one of the first and second connectors comprises an electromagnet; a sensor (120) comprising at least one of a motion sensor, a proximity sensor and a microphone, wherein the sensor is arranged to output a sensor signal (121); and a electromagnetic controller (108) connected to the electromagnet and arranged to control the magnetic field of the electromagnet based on the sensor signal.

The present invention relates to an electrical device comprising: a first connector (102) being magnetically connectable to a second connector (202) of an accessory (200) for forming a magnetic connection between the first and second connectors, wherein at least one of the first and second connectors comprises an electromagnet; a sensor (120) comprising at least one of a motion sensor, a proximity sensor and a microphone, wherein the sensor is arranged to output a sensor signal (121); and a electromagnetic controller (108) connected to the electromagnet and arranged to control the magnetic field of the electromagnet based on the sensor signal.

A magnetic coupling suspension pump includes a stator body and a rotor. The stator body includes a magnetic suspension stator assembly and a magnetic coupler stator assembly; the rotor includes a magnetic suspension rotor assembly and a magnetic coupler rotor assembly; the magnetic suspension stator assembly and the magnetic suspension rotor assembly constitute a magnetic suspension assembly, and the magnetic suspension assembly is configured to generate radial uni-polar magnetic poles and magnetic fields arranged along a circumferential direction, resulting in that the rotor suspends; and the magnetic coupler stator assembly and the magnetic coupler rotor assembly constitute a magnetic coupler assembly, and the magnetic coupler assembly is configured to generate radial non-zero even number of periodic magnetic poles and magnetic fields arranged along the circumferential direction, resulting in that the rotor rotates.

A maglev power generator has a frame, a transmitting shaft, two electricity generating sets, two axial vibration-proof sets, two maglev assemblies, and two radial vibration-proof sets. The transmitting shaft longitudinally extends within the frame. The two electricity generating sets, the two maglev assemblies, and the two radial vibration-proof sets are connected to the transmitting shaft. Each axial vibration-proof set contacts a respective end of the transmitting shaft. The transmitting shaft suspends within the frame and is able to rotate without contact with the frame. The axial vibration-proof sets, the maglev assemblies, and the radial vibration-proof sets provide the transmitting shaft with magnetic forces radially and axially to prevent the rotating transmitting shaft from deviation. Therefore, the transmitting shaft is able to rotate with minimum power loss. The axial vibration-proof sets and the radial vibration-proof sets effectively offer a good vibration-proof function to let the transmitting shaft rotate stably.