Low-power consumption permanent magnetic offset mixed radial magnetic bearing

Abstract

The permanent magnetic offset mixed radial magnetic bearing with low power consumption features that it consists of stator and rotor with air gap in between. The stator includes 8 stator magnetic poles and they forms 4 pairs in both right and left ends and separately for positive and negative directions in X and Y directions. Each stator magnetic pole consists of stator magnetic pole core and stator winding on the core, and 4 stator core yokes are connected across between two stator cores each to constitute the 8 stator magnetic poles, with magnetic isolators being set between the stator core yoke for X direction and that for Y direction. The rotor includes rotation shaft, permanent magnet, magnetizing sleeve and rotor core. The present invention has separated permanent magnetic path and electromagnetic part, lowered control current and control power consumption, small volume and light weight.

Description

Technical field [0001] The invention relates to a non-contact magnetic suspension bearing, in particular to a low-power permanent magnet bias hybrid radial magnetic bearing, which can be used as a non-contact support for rotating parts in mechanical equipment such as motors and machine tools. Background technique [0002] The key to low power consumption of the permanent magnet electromagnetic hybrid magnetic bearing is to ensure that the magnetic flux generated by the electromagnetic coil does not pass through the permanent magnet, but the existing permanent magnet bias hybrid magnetic bearing structure is based on the ordinary radial electromagnetic bearing, along the A permanent magnet is placed axially in the stator, and the magnetic flux generated by the control coil must pass through the permanent magnet. Due to the large reluctance of the permanent magnet, a large excitation current is required for the control coil to generate a certain electromagnetic flux density. Th...

AI Technical Summary

Problems solved by technology

[0002] The key to low power consumption of the permanent magnet electromagnetic hybrid magnetic bearing is to ensure that the magnetic flux generated by the electromagnetic coil does not pass through the permanent magnet, but the existing permanent magnet bias hybrid magnetic bearing structure is based on the ordinary radial electromagnetic bearing, along the A permanent magnet is placed axially in the stator, and the magnetic flux generated by the control coil must pass through the permanent magnet. Due to the large reluctance of the permanent magnet, a large excitation current is required for the control coil to generate a certain electromagnetic flux density. Therefore, the existing permanent magnet Offset hybrid magnetic bearings consume a lot of power, are bulky and heavy

Images