Three degrees of freedom bearingless alternating pole permanent magnet motor control system with axial active suspension

Abstract

The invention relates to a control system for a three-freedom-degree bearingless alternative pole permanent magnet motor in axially active suspension. Aiming at the three-freedom-degree bearingless alternative pole permanent magnet motor in axially active suspension, the invention provides a control scheme implemented by a radial suspension power control subsystem, an axial suspension power control subsystem and a electromagnetic torque control subsystem, so that the control of the electromagnetic torque, the radial suspension power and the axial suspension power of the three-freedom-degree bearingless alternative pole permanent magnet motor in axially active suspension can be realized. The novel motor and a control method of the motor can be used for various special power transmission fields such as high-speed and ultrahigh-speed main shaft motors, aerospace, life science, chemical industry, semiconductor industry and the like, and can be especially used for the occasions of vacuum technology, ultra-cleaning fields and the like without mechanical contact, friction, abrasion, lubrication and sealing.

Description

technical field [0001] The invention relates to an axial active suspension three-degree-of-freedom bearingless alternating pole permanent magnet motor control system in the technical field of electric drive control equipment, which is suitable for high-speed and ultra-high-speed spindle motors, aerospace, life sciences, chemical industry, and semiconductor industries And many other special power transmission fields, especially the occasions that require no mechanical contact, no friction and wear, no lubrication and sealing vacuum technology, ultra-clean fields and other occasions. Background technique [0002] The bearingless technology of the high-speed motor integrates the motor torque output and the rotor electromagnetic suspension support function, which not only inherits the non-contact, no lubrication, no wear, no mechanical noise, high speed, high precision and long life of the magnetic bearing support motor And other excellent characteristics, and has the advant...

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Problems solved by technology

[0004] However, since the three-degree-of-freedom bearingless alternating pole permanent magnet motor with axial active suspension has one more set of axial suspension control windings than the traditional two-degree-of-freedom bearingless alternating pole permanent magnet motor, the air gap of the motor shares the permanent magnet magnetic field, The four magnetic fields of the electromagnetic torque winding magnetic field, the radial suspension force winding magnetic field and the axial suspension force winding magnetic field are superimposed on each other, which makes the air gap magnetic field of this new type of motor more complicated. When controlling it, three sets of windings need to be controlled at the same time , and at the same time ensure sufficient control accuracy, so the requirements for control are relatively high

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