Axial split-phase hybrid excitation type magnetic suspension motor control system

Abstract

The invention discloses an axial split-phase hybrid excitation type magnetic suspension motor control system, which directly controls the electromagnetic torque and suspension force of a motor, saves control delay caused by controlling intermediate quantity, effectively improves the response speed and operation performance of the motor, and meanwhile, in a rotating speed control ring and a radial displacement control ring, the axial split-phase hybrid excitation type magnetic suspension motor control system has the advantages that the control delay is reduced; according to the method, traditional proportional-integral-differential control is replaced by second-order sliding mode control with higher robustness and higher response speed, a reference electromagnetic torque is output after a rotating speed error is adjusted by a second-order sliding mode controller, and further, the electromagnetic torque of the motor is directly controlled; and after the radial displacement error is adjusted by the second-order sliding mode controller, reference suspension force is output, and the suspension force of the motor is further directly controlled, so that second-order sliding mode direct torque and direct suspension force are formed, and the response speed, the anti-interference capability and the suspension performance of the magnetic suspension motor can be effectively improved.

Description

Technical field [0001] The present invention relates to magnetic levitation motor control technology, specifically to an axial split-phase hybrid excitation type magnetic levitation motor control system. Background [0002] Due to the serious friction loss and heat generation problems of traditional mechanical bearings, which restrict the work efficiency and high-speed operation performance of the motor, the research on the magnetic levitation motor has emerged in recent years. By winding the suspension winding on the motor stator, the suspension force is generated, and through the active control of the suspension force, the motor is realized without bearings, frictionless and stable suspension operation. Since there is no fixed bearing, the rotor of the magnetic levitation motor will not be fixed in the equilibrium position, the rotor position will be offset at any time, and there is a coupling between the suspension force and the electromagnetic torque, which affects the stabil...

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Problems solved by technology

But at the same time, it can be seen from its working principle that the torque of the switched reluctance motor is superimposed by a series of pulse torques, which makes the torque pulse of the switched reluctance motor large and the vibration large

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