改进的过调制策略在车用IPMSM宽调速范围控制中的应用

Application of Improved Overmodulation Strategy in Vehicle IPMSM Wide Speed Range Control

当前电动汽车逐渐得到推广,而车用电机控制系统对调速范围有着很高要求。针对车用内置式永磁同步电机的宽调速范围控制,提出一种基于电压增益补偿的过调制弱磁控制策略。该策略通过将调制后的电压补偿给调制前的电压,提高母线电压利用率,实现内置式永磁同步电机更宽调速范围的控制。基于车用内置式永磁同步电机的模型,通过MATLAB/Simulink仿真验证该改进的控制策略的可行性。

At present,electric vehicles are gradually being promoted,and the motor control system for vehicles has high requirements on the speed regulation range.Aiming at the wide speed range control of vehicle built-in permanent magnet synchronous motor,an overmodulation field weakening control strategy based on voltage gain compensation is proposed.By compensating the voltage after modulation to the voltage before modulation,the strategy improves the utilization rate of the busbar voltage and realizes the control of a wider speed regulation range of the built-in permanent magnet synchronous motor.Based on the model of the built-in permanent magnet synchronous motor for vehicles,the feasibility of the improved control strategy is verified by MATLAB/Simulink simulation.