Low-power consumption large-bearing capacity permanent-magnet bias mixed radial magnetic bearing

Abstract

The invention discloses a low-power consumption large-bearing capacity permanent-magnet bias mixed radial magnetic bearing, which is characterized by comprising a stator and a rotor. The stator core is of an asymmetric structure and comprises asymmetric stator magnetic poles; the stator is provided with 8 stator teeth which are distributed at the left and right ends to form stator tooth parts in the positive and negative directions of an X axis and a Y axis respectively; the stator teeth in the negative direction of the Y axis at each end are made from non-magnetic conductive material, and other stator teeth are made from magnetic conductive material; thus, the permanent magnetic circuit is only closed by the magnetic poles in the + / -X and +Y directions; the outer surface of the stator core consists of two magnetic conductive rings; and the permanent magnet is clamped between the two magnetic conductive rings along the axial direction. Through the invention, the permanent magnetic circuit is not symmetric, and only a +Y magnetic pole is magnetic conductive in the Y direction, when the bearing capacity is provided in the Y direction, the attractive force of the stator teeth in the -Y direction to the rotor is zero, so the stator teeth in the +Y direction do not need to provide additional force to cancel out the attractive force in the -Y direction; therefore, the coil current in the Y direction is reduced, the power consumption is reduced, and large bearing capacity can be provided in the Y direction.

Description

Technical field: [0001] The invention relates to a non-contact magnetic suspension bearing, in particular to a permanent magnet bias hybrid radial magnetic bearing with low power consumption and large bearing capacity, which can be used as a bearing position for fans, machine tools, lathes, etc. Provides non-contact support in mechanical equipment with high load-bearing capacity. Background technique: [0002] Magnetic suspension bearings are divided into pure electromagnetic bearings and permanent magnetic bias magnetic suspension bearings. The former uses a large current and consumes a lot of power. This kind of bearing can greatly reduce the control current and reduce the loss. However, the current permanent magnet bias radial magnetic bearing structure, such as the patent ZL2005100112718 realizes low power consumption, and the patent ZL2005100115307 realizes the decoupling of the radial horizontal channel and the vertical channel of the radial magnetic bearing, but the ...

AI Technical Summary

Problems solved by technology

Due to the above defects, the existing permanent magnet bias magnetic bearings have the disadvantages of large power consumption, large volume and heavy weight when outputting a large bearing capacity

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