Current Distribution Method of Induction Motor for Electric Vehicle in Whole Speed Range Based on Gaussian Process

Abstract

A current distribution method based on Gaussian process is proposed in this paper. This method can improve the accuracy of current distribution of induction motors for electric vehicles in whole speed range, and achieve high-performance output torque. First, a vector control system based on current distribution model is designed based on control requirement analysis of induction motor. Second, the mathematical model of output torque and current is established. And the current distribution law of the optimal electromagnetic torque under various operating conditions is qualitatively analyzed. Third, the experimental platform is built to obtain the discrete data of current distribution in whole speed range and the rotor time constants at different temperatures. Finally, the Gaussian process is introduced to establish the regression model based on current discrete data. The regression model distributes the current reasonably and accurately, which is embedded in the control system. Experimental results verify the effectiveness of the proposed method.

Keywords

• Control system
• current distribution
• flux-weakening region
• Gaussian process
• induction motor
• output torque