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 a thrust bearing (1), axial bearing stators (2) and an axial displacement detection device (3), the axial bearing stators (2) are arranged at the two axial ends of the thrust bearing (1) respectively, and the axial displacement detection device (3) is arranged on at least one axial bearing stator (2); the axial bearing stator (2) comprises a stator core (8) and a stator coil (9), the stator core (8) is provided with a wire groove, the stator coil (9) isembedded in the wire groove, and the axial displacement detection device (3) is arranged on the radial outer side of the wire groove of the stator core (8). According to the magnetic suspension bearing, the control precision of the magnetic suspension bearing can be improved, the influence of the axial displacement detection device on the magnetic induction structure of the axial bearing stator isavoided, and the working performance of the magnetic suspension bearing is improved.

Description

[0001] This application is a divisional application of a Chinese patent application submitted to the China Patent Office on "May 13, 2019" with the application number "201910395606.2" and the title of the invention is "Magnetic Suspension Bearing, Motor, Compressor and Air Conditioner". technical field [0002] The application belongs to the technical field of air conditioning, and in particular relates to a magnetic suspension bearing, a motor, a compressor and an air conditioner. Background technique [0003] Magnetic suspension bearings have the characteristics of no mechanical contact, no lubrication, high critical speed, long service life and high reliability, and are widely used in high-speed and ultra-high-speed fields. As an indispensable part of the magnetic levitation system, the sensor’s detection accuracy is very important. Improving the position detection accuracy of the magnetic levitation system can not only improve the overall performance of the system but als...

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Problems solved by technology

[0006] However, for this structure, due to the large distance between the axial position of the rotor detected by the axial sensor and the axial position of the thrust plate, the axial position of the rotor detected by the axial sensor is different from the actual position of the thrust bearing. The axial clearance data may be inconsistent, which will affect the control accuracy of the system, thereby reducing the working performance of the magnetic suspension bearing

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