Control method for permanent magnet synchronous motor

Abstract

The invention discloses a control method for a permanent magnet synchronous motor. The control method comprises the following steps: determining initial parameters of the permanent magnet synchronous motor; performing unified modeling on the motor and a converter thereof by using a hybrid switching theory; detecting the parameters of the permanent magnet synchronous motor again; performing on-line parameter identification on the motor by using a model reference adaptive parameter identification method; obtaining a PWM (Pulse-Width Modulation) signal for on / off of a converter power switch tube according to the solved optimal converter switching state combination; driving the converter to output corresponding voltage and current to complete the control over the motor. According to the control method disclosed by the invention, the control over the motor is completed by adopting the hybrid switching theory. The control method has the advantages of quick dynamic response and quick adjustment; besides, by using the model reference adaptive method, the identification of motor parameters is finished, high adaptive capability, high disturbance resistance and accuracy in control of the control method are guaranteed, and a permanent magnet synchronous motor system has more excellent dynamic and static performance and adaptive capability.

Description

technical field [0001] The invention belongs to the technical field of motor control, and in particular relates to a method for controlling a permanent magnet synchronous motor. Background technique [0002] With the rapid development of permanent magnet manufacturing technology, power electronics technology and motor control strategy, permanent magnet synchronous motor (Permanent Magnet Synchronous Motor, PMSM) has high air gap flux density, small torque ripple, large torque / inertia ratio, With the advantages of high efficiency, it is widely used in the fields of high-performance machine tool control, position control and wind power generation. In recent years, with the continuous development of wind power generation and the rapid increase of wind power installed capacity, the application prospects of permanent magnet synchronous motors are broader. At the same time, the control accuracy and response speed of permanent magnet synchronous motors are also facing higher requi...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of slow dynamic response and poor control precision of permanent magnet synchronous motor control, and provide a permanent magnet synchronous motor control method with fast dynamic response capability, strong self-adaptive ability and high control precision

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