Method and device for inversely controlling fuzzy compensation of radial position of bearing-free synchronous reluctance motor

Abstract

The invention discloses a method and a device for inversely controlling the fuzzy compensation of the radial position of a bearing-free synchronous reluctance motor, which is suitable for the suspension operation control of the bearing-free synchronous reluctance motor. The control method comprises: forming a composite controlled object by using an expanded hysteresis loop PWM inverter and the radial position of a controlled motor; reconstructing an inverse system of the composite controlled object; connecting the inverse system before the composite controlled object in series to compound a pseudo linear system consisting of two radial position subsystems; and designing a closed-loop fuzzy compensator for the pseudo linear system to perform decoupling control of the radial position of the controlled motor. The control device comprises the inverse system, the closed-loop fuzzy compensator and the expanded hysteresis loop PWM inverter. The method and the device are used for building a novel decoupling control device of the bearing-free synchronous reluctance motor to realize the high-performance suspension control of the motor and are widely used in alternating current power transmission and servo systems using the bearing-free synchronous reluctance motor as a power device, have a simple control system algorithm, have the advantage of high load disturbance resistance and have high dynamic and static adjustment performance.

Description

technical field [0001] The invention is a fuzzy compensation inverse control method and device for the radial position of a bearingless synchronous reluctance motor, which is suitable for the high-performance suspension operation control of the bearingless synchronous reluctance motor and belongs to the technical field of electric drive control equipment. Background technique [0002] The bearingless synchronous reluctance motor integrates the magnetic levitation bearing and the ordinary synchronous reluctance motor. It is a new electromechanical energy conversion device that realizes the rotor's own rotation and stable suspension at the same time. Because the support of the mechanical bearing to the rotor is omitted, it has A series of outstanding high quality: high speed, no lubrication, no wear, long life, etc., broaden the application field of high-speed motors. Bearingless synchronous reluctance motor is more suitable for ultra-high-speed applications, high temperature ...

AI Technical Summary

Problems solved by technology

[0004] One of the existing decoupling control methods for bearingless synchronous reluctance motors is to connect feed-forward compensators in series. This method uses the stator given current as the offset signal to realize decoupling, but only when the stator given current and the stator detection current are always completely The decoupling can be successful only when they are equal; another decoupling control method is feedback decoupling, which uses the stator detection current to directly replace the stator given current to realize decoupling control, but the existence of the motor hysteresis link makes the stator detection current and the stator actual The current is not exactly the same, which will also cause decoupling failure

[0005] For the decoupled system, the current method is to use a single conventional PID controller for closed-loop control, but the conventional PID controller is difficult to cope with various complex operating conditions, and the parameters of the PID controller are difficult to adjust in real time, which seriously affects the operation of the suspension system performance, poor control

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