Low power consumption 5-freedom permanent magnetism off-set magnetic suspension bearing system

Abstract

The invention relates to a low power consumption 5-DOF (Degree of Freedom) permanent magnet offset magnetic suspension bearing system belonging to a magnetic suspension bearing, which comprises a high-speed motor, a low power consumption permanent magnet offset axial and radial magnetic baring and a low power consumption permanent magnet offset radial magnetic bearing. 5-DOF (Degree of Freedom) suspension utilizes two radial magnetizing annular permanent magnetic bodies to establish a static offset magnetic field and runs through a 3-DOF (Degree of Freedom) magnetic bearing radial magnetic pole, a radial air gap, a rotor iron core, a rotor and a 2-DOF (Degree of Freedom) permanent magnet offset magnetic bearing radial stator to form a closed magnetic circuit; an axial winding generates control magnetic flux and offset magnetic flux superposition to control axial suspension; a radial control winding of three magnetic poles on the left end and the right end generates the control magnetic flux and the offset magnetic flux suspension; a triple / binary conversion principle of an alternating current motor is used to realize radial 4-DOF (Degree of Freedom) suspension; the system has a simple structure, high critical speed of rotation and low power consumption and has wide application prospect in the fields of aerospace, automobiles and motorcycles, mould machining, textile, chemical engineering machinery, etc.

Description

technical field [0001] The low power consumption five-degree-of-freedom permanent magnet bias magnetic suspension bearing system of the present invention belongs to the five-degree-of-freedom magnetic suspension bearing combined with magnetic bearing technology and high-speed motors. Background technique [0002] Modern industrial production and transportation are increasingly inseparable from the development of high-speed and ultra-high-speed motors, especially in the fields of aviation, aerospace, navigation, automobile and motorcycle industry, machining and production, and high-speed motors have been widely used. However, bearing support technology has always been an obstacle that limits the high-power practical application of high-speed motors. At present, due to contact wear, angular contact ball bearings generate heat, have low bearing capacity and rigidity, and are prone to mechanical failures and stop production, resulting in major economic losses and even casualties...

AI Technical Summary

Problems solved by technology

[0003] However, the traditional high-speed motor system simply uses two radial electromagnetic bearings and one axial electromagnetic bearing to replace the mechanical bearing to control the five-degree-of-freedom suspension of the motor, which occupies considerable axial space, complex structure, and low reliability and safety. high

Since 2000, many scholars in the world have proposed various forms of three-degree-of-freedom permanent magnet bias axial / radial hybrid magnetic bearings. This type of magnetic bearing partially solves the problem of low axial space utilization of magnetic bearings, but its design , The installation is relatively complicated, especially for axial installation requirements

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