基于TLGI技术的纯电动汽车车用电动机新型控制

New control strategy of motor for pure electric vehicle based on TLGI technology

针对纯电动汽车永磁同步电动机(PMSM)传统的直接转矩控制在电动机转速较低时的转矩脉动问题,提出了基于二电平广义逆变器(TLGI)技术的空间电压矢量调制技术(SVPWM)的新型控制策略,论述了将基于TLGI的SVPWM技术运用于PMSM电动机的原理及实现过程,推导了SVPWM的开关状态函数表,研究了SVPWM的电压幅值和电压矢量分区,最后基于新型SVPWM控制方法对一纯电动汽车车用电动机进行了Matlab/Simulink建模和仿真.通过对电动机控制系统的仿真结果表明:该方法可以有效扩大SVPWM线性调制区域,缩短系统调节时间,相比传统的直接转矩控制使用的滞环控制方法,该控制方法更具优越性.

To solve the problem of torque ripple in traditional direct torque control of permanent magnet synchronous motor(PMSM)for pure electric vehicle at low motor speed,a new control strategy of space vector pulse width modulation(SVPWM)was proposed based on two-level generalized inverter(TLGI)technology.The principle and implementation process of applying SVPWM technology based on TLGI to PMSM motor were discussed.The switch state function table of SVPWM was derived,and the voltage amplitude and voltage vector partition of SVPWM were investigated.Based on the new SVPWM control method,a pure electric vehicle motor was modeled and simulated by Matlab/Simulink.The simulation results of the motor control system show that the proposed method can effectively expand the SVPWM linear modulation region and shorten the system regulation time.Compared with the hysteresis control method in traditional direct torque control,the proposed control method has more advantages.