Bearingless synchronous reluctance motor torque and suspension force direct controller and construction method thereof

Abstract

The method discloses a bearingless synchronous reluctance motor torque and suspension force direct controller and a construction method thereof. The bearingless synchronous reluctance motor torque and suspension force direct controller consists of a direct torque controller with a rotating speed and torque double closed loop and a suspension force direct controller with a rotor displacement and suspension force double closed loop, wherein the direct torque controller consists of two proportional plus integral (PI) controllers, a torque winding flux linkage and a torque observer, a reference flux linkage generating module and a space vector pulse width modulation module; and the suspension force direct controller consists of two proportional plus integral plus derivative (PID) controllers, a torque winding flux linkage and torque observer, a suspension force winding flux linkage observer, a suspension force estimation module, a force / flux linkage conversion module and a space vector pulse width modulation module. By the controller and the construction method, motor torque and radial suspension force are independently controlled, stable suspension and operation of a motor rotor are ensured and high motor operating performance is achieved.

Description

technical field [0001] The invention relates to a bearingless synchronous reluctance motor used in high-speed ultra-high-speed numerical control machine tools, turbomolecular pumps, centrifuges, compressors, electromechanical energy storage, aerospace and other special electric transmission fields, especially relates to a bearingless synchronous reluctance motor rotor. Torque and levitation force direct controller and construction method for high performance control of bearingless synchronous reluctance motor. Background technique [0002] Bearingless synchronous reluctance motor is a multivariable, nonlinear and strongly coupled controlled object, and its radial position and speed are difficult to be accurately controlled by external signals. To achieve stable suspension and operation of the motor rotor, decoupling control of the motor torque and suspension force must be performed. [0003] At present, the decoupling control of bearingless synchronous reluctance motor torq...

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Problems solved by technology

[0003] At present, the decoupling control of bearingless synchronous reluctance motor torque and suspension force mainly adopts the current tracking inverter with high switching frequency and low capacity utilization rate, and adopts vector control. The system relies too much on complex motor parameters and vector Coordinate transformation, the control of the suspension force is in an open-loop state, which limits the accuracy and dynamic response performance of the suspension force control, making it difficult for the actual control effect to reach the theoretical analysis results

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