Variable damping-based passive control method for two-degree-of-freedom permanent magnetic synchronous motor

Abstract

The invention discloses a permanent magnetic synchronous motor control system under variable damping-based two-degree-of-freedom passive control. The system consists of a main circuit and a control circuit, wherein the control circuit comprises a signal detection circuit, a rotating speed control outer ring and a torque control inner ring. A rotating speed outer ring controller is designed by adopting a PI (Proportion Integration) control method, and the output is a given signal of passive control; a variable-damping two-degree-of-freedom passive control method is adopted in a torque magnetic chain inner ring controller, and the output is a two-phase alternating-current voltage on a two-phase rotary coordinate system; and passive control of the permanent synchronous motor is realized through space vector pulse width modulation conversion and a power switching device acting on a main circuit inverter. Due to the adoption of a passive control method disclosed by the invention, independent setting of the tracking performance and interference performance is realized, the rotating speed of the motor meets the requirement of accurate control, and the overall performance of the system can be improved effectively.

Description

technical field [0001] The invention belongs to the technical field of motor control, and relates to a passive control method of a two-degree-of-freedom permanent magnet synchronous motor based on variable damping. Background technique [0002] Permanent magnet synchronous motor (permanent magnet synchronous motor, permanent magnet synchronous motor) is a complex object with multiple variables, strong coupling, nonlinearity, and variable parameters. It has the advantages of high precision, high dynamic performance, high reliability, and small size. The occasions requiring high precision and high reliability have been widely used, such as industrial, civil, military and other fields. The existing permanent magnet synchronous motor control methods are basically based on vector control or direct torque control. Although they can obtain high dynamic and static performance, the vector control system has complex structure, large amount of calculation, and sensitivity to parameter ...

AI Technical Summary

Problems solved by technology

[0003] The present invention is to overcome the deficiencies in the above-mentioned prior art, and proposes a passive control method of a two-degree-of-freedom permanent magnet synchronous motor based on variable damping, so as to solve the problem of motor speed and motor parameters affecting the control of permanent magnet synchronous motors The problem of system control accuracy and dynamic response speed

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