Permanent magnet biased external rotor radial magnetic bearing

Abstract

The permanent magnetic offset external rotor magnetic radial bearing features that it consists of rotor iron core, permanent magnet, stator iron core and exciting winding. Eight stator iron core magnetic poles distributed homogeneously in a circumference are wound with exciting winding; and four permanent magnets are embedded inside the stator iron core separately in the +X, -X, +Y and -Y directions to produce offset magnetic field in X direction and offset magnetic field in Y direction separately. Between the outer surface of the stator iron core and the inner surface of the rotor iron core, there is air gap. The permanent magnetic offset external rotor magnetic radial bearing of the present invention has the advantages of no coupling between the X direction permanent magnetic path and the Y direction permanent magnetic path, small size, low power consumption, reliable performance and easy control.

Description

Technical field

[0001] The invention relates to a non-contact magnetic suspension bearing, in particular to a low-power consumption, small-volume permanent magnet bias external rotor radial magnetic bearing, which can be used as non-contact support for rotating parts in spacecraft such as satellites and space stations. Background technique

[0002] Magnetic suspension bearings are divided into pure electromagnetic bearings and hybrid magnetic suspension bearings with permanent magnetic bias and electromagnetic control. The former uses large current and consumes a lot of power, and the hybrid magnetic suspension bearings with permanent magnetic bias and electromagnetic control. The magnetic field generated by the permanent magnet bears the main load. Bearing capacity, the electromagnetic field provides auxiliary adjustment bearing capacity, so this kind of bearing can greatly reduce the control current and reduce the loss. However, some of the current permanent magnet bias ou...

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