Control method and system for current loop prediction of permanent magnet synchronous motor

Abstract

The invention relates to a control method and system for current loop prediction of a permanent magnet synchronous motor, belongs to the technical field of automatic control, and solves the problems of high control cost, poorer robustness and the like of a traditional controller. The method comprises the steps: collecting current values and voltage values of d and q axes of the permanent magnet synchronous motor; obtaining a reference value of q-axis current of the permanent magnet synchronous motor; establishing a current dead-beat control model; inputting current values and voltage values of d and q axes of the permanent magnet synchronous motor and a reference value of q-axis current of the permanent magnet synchronous motor into a current dead-beat control model to obtain a predicted voltage of the q axis at the next moment; obtaining the predicted voltage of the d axis at the next moment; obtaining a PWM control signal based on the predicted voltage of the q axis and the predicted voltage of the d axis at the next moment, and inputting the PWM control signal to an inverter connected with the permanent magnet synchronous motor so as to realize driving control of the permanent magnet synchronous motor. The control cost is saved, and the robustness of the controller is improved.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a control method and system for current loop prediction of a permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motor (Permanent Magnet Synchronous Motor, PMSM) has the characteristics of simple structure, high reliability, high power factor, high energy utilization rate, hard mechanical characteristics, wide speed range, etc., so permanent magnet synchronous motor is widely used in aviation Aerospace, automobiles, CNC machine tools, robots and other fields. [0003] When using the traditional PID controller to control the permanent magnet synchronous motor, due to the nonlinear and variable coupling characteristics of the motor, the traditional controller needs to adjust the parameters under different operating conditions of the motor, wasting time and resources, that is, the traditional control The control cost of the contr...

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, the embodiment of the present invention aims to provide a control method and system for current loop prediction of permanent magnet synchronous motors, so as to solve the problems of high control cost and poor robustness of traditional controllers.

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