Improved Fuzzy Flux-Weakening Control of Electric Vehicle Motor

Abstract

With the development of rare earth technology, permanent magnet synchronous motors have been increasingly used and have broad development prospects. In order to extend the speed limit of the high-efficiency range of motor operation, the predecessors conducted extensive research on the flux-weakening technology of the motor, which has the characteristics of fast, high performance and high precision. Based on previous research, this paper proposes an improved fuzzy flux-weakening control strategy for electric vehicle motors. Based on the triangular method leading angle flux-weakening control and fuzzy control principle, the re-optimized fuzzy PI(Proportional Integral) adjustment parameters and leading angle flux-weakening control are re-optimized. In combination, the maximum torque of the motor operating point is obtained. The feedback speed is obtained according to the principle of double reaction, which improves the field weakening characteristics of the motor, and further improves the reaction speed and control accuracy. And verified the feasibility of the entire strategy and improved performance advantages through MATLAB/Simulink.