五桥臂逆变器两PMSM最大转矩电流比控制

Dual PMSM fed by a five-leg inverter system using maximum torque per ampere

多电机驱动系统通常应用在电动汽车,高铁还有一些工业应用上面,比如纺织行业,钢铁行业和造纸行业等。现提出了一种基于最大转矩电流比(MPTA)控制的五桥臂逆变器两永磁同步电机(PMSM)驱动系统。根据永磁同步电机在d轴q轴坐标下的方程,推出d轴q轴电流和转矩的表达式,实现了最大转矩电流比控制。基于MATLAB/Simulink建立了永磁同步电机的数学模型和电流控制方法。仿真结果和传统的id=0控制策略进行对比,验证了最大转矩电流比控制的有效性和实用性。

Multiple motor drive system is usually adopted in electric vehicles, high speed rail and some industry applications, such as textile, steel and paper making. A maximum torque per ampere （ MTPA） control strategy based on a dual permanent magnet synchronous motors （ PMSM） drive system fed by a live-leg inverter is investigated in this paper. According to the equation in the d-q axis coordinates of the PMSM,the d-axis and q-axis current and torque expression can be inferred. Then the maximum torque current ratio control can be achieved. The simulation model and current control method are established based on MATLAB/Simulink. Comparing the result of MTPA control strategy with id =0 control strategy, the simulation results verify the validity and the practicability of the MTPA control strategy.