Bearingless synchronous reluctance motor rotor eccentric displacement controller and construction method thereof

Abstract

The invention discloses a bearingless synchronous reluctance motor rotor eccentric displacement controller and a construction method thereof. The motor rotor eccentric displacement controller comprises a rotation speed controller, a torque winding air gap flux linkage estimation module and an eccentric displacement controller body. A rotation speed given value is taken as an input value of the rotation speed controller, three-phase torque winding drive current values are taken as output values, torque winding three-phase phase voltage values and phase current values are taken as input values of the torque winding air gap flux linkage estimation module, an amplitude and a phase position of a torque winding air gap flux linkage are taken as output values of the torque winding air gap flux linkage estimation module, the amplitude and the phase position of the torque winding air gap flux linkage, rotor displacement given values X* and Y* and a rotor position angle are taken as input values of the eccentric displacement controller body, three-phase suspension force winding drive current values are taken as output values of the eccentric displacement controller body, and then the bearingless synchronous reluctance motor rotor eccentric displacement controller is constructed. Therefore, an electromagnetic torque and radial direction suspension force of a bearingless synchronous reluctance motor can be independently controlled, and control performance of the whole system is effectively improved.

Description

technical field [0001] The invention relates to a controller for directly controlling the eccentric displacement of the rotor of a bearingless synchronous reluctance motor to achieve stable suspension and high-speed rotation, which is suitable for high-performance control of the bearingless synchronous reluctance motor. Bearingless synchronous reluctance motors have broad application prospects in special electric transmission fields such as machine tool electric spindles, turbomolecular pumps, centrifuges, compressors, electromechanical energy storage, aerospace, etc., and belong to the technical field of electric transmission control equipment. Background technique [0002] The use of electromagnetic bearings to support the rotor of a bearingless motor, and the precise control of the eccentric displacement of the rotor to achieve stable suspension of the motor have always been the focus and difficulty of bearingless motor research. There are two main methods for controlling...

AI Technical Summary

Problems solved by technology

There are two main methods for controlling the stable suspension of the motor rotor: the vector control method and the direct suspension force control method, which can basically realize the control of the radial suspension force of the motor rotor, but both control methods have obvious deficiencies: the vector control method The control method requires cumbersome coordinate transformation, which increases the complexity of the control system software and hardware, and takes up too many system clock cycles; the direct suspension force control method requires online identification of the radial suspension force of the motor rotor, which not only increases the system Hardware design cost, and the identification accuracy of radial suspension force also determines the overall control performance of the system

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