Magnetic suspension bearing, motor, compressor and air conditioner

Abstract

The invention provides a magnetic suspension bearing, a motor, a compressor and an air conditioner. The magnetic suspension bearing comprises an axial magnetic field control part, a radial magnetic field control part and a rotor assembly, the rotor assembly comprises a rotor iron core, the axial magnetic field control part comprises an axial control end opposite to the end face of the rotor iron core, the axial control end is provided with an axial control winding, each radial magnetic field control part comprises a radial control end arranged opposite to the peripheral surface of the rotor iron core, each radial control end is provided with a radial control winding, permanent magnets are arranged between the axial magnetic field control parts at the two ends and the radial magnetic field control parts respectively, the permanent magnets provide bias magnetic fields for the axial magnetic field control parts at the ends where the permanent magnets are located, the permanent magnets at the two ends jointly provide the bias magnetic field for the radial magnetic field control part. According to the magnetic suspension bearing, front and rear axial control magnetic fields can be mutually independent and do not interfere with each other, front and rear axial control systems are independent, the control logic is simplified, and the system stability is improved.

Description

technical field [0001] The present application relates to the technical field of magnetic suspension, in particular 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 suspension bearings are divided into three types: active, passive, and hybrid. Active magnetic suspension bearings have high rigidity and can be precisely controlled, but require a large volume and power consumption to generate unit bearing capacity; passive magnetic suspension 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 mag...

AI Technical Summary

Problems solved by technology

[0005] The front and rear axial control magnetic field coupling of the magnetic levitation system structure controls the axial levitation, the axial and radial control magnetic circuits interfere with each other, the control logic is complicated, and the system stability is low

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