Magnetic bearings, motors, compressors and air conditioners

Abstract

The invention provides a magnetic suspension bearing, a motor, a compressor and an air conditioner. The magnetic suspension bearing includes a radial bearing including a stator assembly and a rotor assembly, the stator assembly includes a stator core, the rotor assembly is sleeved with the inner peripheral side of the stator assembly, the central portion of the stator core in the axial direction is provided with a first permanent magnet used for generating a bias magnetic field, the first permanent magnet conducts magnetizing in the radial direction, the first end of the inner peripheral wallof the stator core is provided with a first control magnetic pole for controlling the rotor assembly to do reciprocating motion along a first straight line, the second end of the inner peripheral wallof the stator iron is provided with a second control magnetic pole for controlling the rotor assembly to do reciprocating motion along a second straight line, the first straight line and the second straight line are located in a first plane, and the first plane is perpendicular to the central axis of the stator core. According to the magnetic suspension bearing, the problems that when multiple-degree-of-freedom control is carried out over the magnetic suspension bearing, the multiple-degree-of-freedom control magnetic fields are coupled to each other, and the control logic is complicated canbe solved.

Description

technical field [0001] The application belongs to the technical field of motors, and in particular relates to a magnetic suspension bearing, a motor, a compressor and an air conditioner. Background technique [0002] Magnetic suspension bearings have a series of excellent qualities such as no contact, no wear, high speed, high precision, no need for lubrication and sealing, and are a high-tech product integrating electromagnetics, electronic technology, control engineering, signal processing, and mechanics. [0003] Magnetic bearings are divided into three types: active, passive, and hybrid. Active magnetic bearings have high rigidity and can be precisely controlled, but require a large volume and power consumption to generate unit bearing capacity; passive magnetic bearings use the attraction between magnetic materials Or repulsion realizes the suspension of the rotor, and the stiffness and damping are relatively low; the hybrid magnetic bearing uses permanent magnets to pr...

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved in this application is to provide a magnetic suspension bearing, a motor, a compressor, and an air conditioner, which can avoid the multi-degree-of-freedom control magnetic field coupling with each other when the magnetic suspension bearing is controlled by multiple degrees of freedom, and the control logic is complicated. question

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