Current Control Method of Switched Flux Linkage Permanent Magnet Synchronous Motor Based on Model Prediction

Abstract

The invention discloses a model prediction-based current control method for a flux-switching permanent magnet synchronous machine. The current control method comprises the following steps: performing combination on states of a switching tube of a machine inverter to obtain eight groups of switching vector signals; predicting the p phase winding current of the next moment k+1 under each group of switching vector signals at the current moment k; obtaining current predicted values of a d (direct) axis and a (quadrature) axis at the next moment k+1 under each group of switching vector signals; calculating the predictive current error of the d axis and the predictive current error of the q axis at the next moment k+1 under each group of switching vector signals; calculating a cost function under each group of switching vector signals; selecting the switching vector signals when the cost function is minimum, and controlling the on-off of the switching tube of the inverter in real time by taking the switching vector signals as drive signals of an inverter switch to complete the current control of the flux-switching permanent magnet synchronous machine. According to the method, the switching vector changes of the inverter can be accurately controlled, so that the torque fluctuation and the flux fluctuation of the machine are minimal.

Description

technical field [0001] The invention belongs to the technical field of switched flux linkage permanent magnet synchronous motors, and more specifically relates to a current control method of switched flux linkage permanent magnet synchronous motors based on model prediction. Background technique [0002] Energy is one of the hottest topics in the world today, and the research and application of environmental protection and energy-saving technologies is a subject that countries all over the world attach great importance to. The sustainable development of industry and society has constantly put forward new requirements for the main motor of power energy consumption, that is, under the premise of as much as possible, the motor must not only have a simple and firm mechanical structure, a high torque density, but also have a robust It has the advantages of good stickiness and strong fault tolerance. [0003] The new doubly salient permanent magnet synchronous motor (Doubly Salie...

AI Technical Summary

Problems solved by technology

However, it is difficult to significantly improve the performance index of FSPMSM only from the perspective of structural topology and electromagnetic optimization design, so it is necessary to combine advanced control strategies to further enhance the driving ability of FSPMSM

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