Construction method of bearingless permanent magnetic slice motor rotor radial displacement controller

Abstract

The invention discloses a construction method of a bearingless permanent magnetic slice motor rotor radial displacement controller. The construction method includes that a rotary speed control composed of an inner current ring and an outer speed ring is constructed, and a torque winding air gap flux estimation module is designed with a actual direct axis of a torque winding, quadrature axis current and a permanent magnet slice rotor position angle as inputs and torque winding air gap flux amplitudes and phases as outputs; a radial displacement controller is composed of a rotor eccentric displacement and eccentric angle calculation module, a differential ahead PID (proportion integration differentiation) controller, a levitation force winding current calculation module, a CRPWM (current-regulated pulse-width modulation) inverter, a radial displacement sensor and a radial displacement calculation module; the motor rotor radial displacement controller is composed of the rotary speed controller, the radial displacement controller and the torque winding air gap flux estimation module. By the construction method, intermediate complex coordinate vector transformation is omitted, complexity of a control system and a system clock period consumed by the control algorithm are reduced, and control performance of the whole system is effectively improved.

Description

technical field [0001] The invention relates to a controller that directly controls the radial displacement of the rotor of a bearingless permanent magnet sheet motor to achieve stable suspension and high-speed rotation, and is suitable for sealed pumps, high-speed or ultra-high-speed numerical control machine tools, industrial robots, aerospace, life Science and many other special electric drive fields using bearingless permanent magnet sheet motors belong to the technical field of electric drive control. Background technique [0002] The use of electromagnetic bearings to support the rotor of a bearingless motor, and the precise control of the radial displacement of the rotor to achieve stable suspension of the motor rotor have always been the focus and difficulty of bearingless motor research. There are two main methods of controlling the stable suspension of the motor rotor that have been proposed: the vector control method and the direct suspension force control method,...

AI Technical Summary

Problems solved by technology

There are two main methods of controlling the stable suspension of the motor rotor that have been proposed: 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 these two control methods have obvious deficiencies and limitations. Disadvantages: The vector control method requires cumbersome coordinate transformation, which increases the complexity of the control system software 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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