A Current Control Method of Stator Permanent Magnet Memory Motor Based on Non-Permanent Magnet Flux Observer

Abstract

The invention relates to a current control method of a stator permanent magnet type memory motor based on a non-permanent magnet flux observer. According to the magnetization state of the permanent magnet, select k Permanent magnet flux linkage, and calculate the corresponding speed range; then given by the speed n * and the speed given at the previous moment n ** Determine the change direction of the given speed; n * Satisfied speed range determines the speed given n * The corresponding permanent magnet flux linkage; finally based on the speed given n * , the change direction of the given rotational speed and the flux linkage of the permanent magnet determine the magnetization process of the permanent magnet. The invention has the advantages of easy realization, strong robustness, avoiding frequent adjustment of magnetization state or even failure of adjustment of magnetization state, and the like.

Description

technical field [0001] The invention relates to the technical field of electric transmission, in particular to a current control method of a stator permanent magnet memory motor based on a non-permanent magnet flux observer. Background technique [0002] In order to realize the adjustment of the magnetization state of magnetization or demagnetization in different speed ranges of the stator permanent magnet memory motor, the permanent magnet flux linkage observer can be used to observe the permanent magnet flux linkage of the motor in real time. However, the current control strategy of the stator permanent magnet memory motor based on the permanent magnet flux observer has the following shortcomings: [0003] 1) The permanent magnet flux linkage observer uses signals such as voltage, current, and speed to obtain the real-time permanent magnet flux linkage of the motor, which is complicated to calculate and debug; [0004] 2) The stability and rapidity of the permanent magnet...

AI Technical Summary

Problems solved by technology

[0003] 1) The permanent magnet flux linkage observer uses signals such as voltage, current, and speed to obtain the real-time permanent magnet flux linkage of the motor, which is complicated to calculate and debug;

[0004] 2) The stability and rapidity of the permanent magnet flux linkage adaptive law are easily affected by the motor parameters, and it is difficult to select a suitable feedback gain matrix;

[0005] 3) The observation accuracy of the permanent magnet flux linkage observer is also affected by the motor parameters. In order to obtain a better segmented magnetization adjustment effect, it is not appropriate to divide more permanent magnet magnetization states;

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