Method for identifying permanent magnet flux linkage of non-salient pole permanent magnet synchronous motor, and identification device

Abstract

The invention provides a method for identifying a permanent magnet flux linkage of a non-salient pole permanent magnet synchronous motor, an identification device and a computer readable storage medium. The method for identifying the permanent magnet flux linkage of the non-salient pole permanent magnet synchronous motor comprises the following steps of acquiring a phase voltage and a phase current of the non-salient pole permanent magnet synchronous motor on an <alpha><beta> coordinate system; and according to the phase voltage, the phase current and a stator inductance L<s> of the non-salient pole permanent magnet synchronous motor, calculating the permanent magnet flux linkage <psi><f>. By adoption of the permanent magnet flux linkage identification method, the permanent magnet flux linkage is subjected to online identification without influencing the normal operation of the motor, and the identification precision is improved, and therefore, reasonability of design of a motor control system is ensured, and the control effect of the non-salient pole permanent magnet synchronous motor is improved.

Description

technical field [0001] The present invention relates to the technical field of permanent magnet synchronous motors, in particular to an identification method, an identification device and a computer-readable storage medium for permanent magnet flux linkage of a hidden pole permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motors have been widely used in various industries due to their good control performance, high power density, and energy saving. It is inevitable to use motor parameters in the control system design of permanent magnet synchronous motors. The change of parameters such as the speed loop control of permanent magnet synchronous motors may lead to the reduction of motor control accuracy and performance based on the ideal model, and even in severe cases. cause the motor system to lose control. The speed loop control and other parameters are related to the permanent magnet flux linkage. Factors such as motor temperatu...

AI Technical Summary

Problems solved by technology

It is inevitable to use motor parameters in the control system design of permanent magnet synchronous motors. The change of parameters such as the speed loop control of permanent magnet synchronous motors may lead to the reduction of motor control accuracy and performance based on the ideal model, and even in severe cases. lead to loss of control of the motor system

The speed loop control and other parameters are related to the permanent magnet flux linkage. Factors such as motor temperature rise, magnetic field saturation, motor aging, and current fluctuations may affect the permanent magnet flux linkage.

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