内置式永磁同步电机牵引系统宽调速非线性控制器

针对内置式永磁同步电机(IPMSM)牵引系统机械参数时变、恒转矩区需高转矩输出、恒功率区需宽调速问题,运用非线性自适应控制理论,设计了一种电流滞环控制非线性自适应反步控制器。该非线性控制器在恒转矩区采用最大转矩比电流控制,提高转矩输出能力;在恒功率区采用弱磁控制策略,扩大调速范围;同时对电机参数摄动有较强的抑制能力,表现出较好的鲁棒性。仿真结果证明了IPMSM牵引系统非线性控制器的正确性和有效性。

Nonlinear controller of traction system for interior permanent magnet synchronous motor

As the traction system of IPMSM(Interior Permanent Magnet Synchronous Motor) has time-varying parameters and needs high torque output and wide speed regulation, a nonlinear adaptive back-stepping controller with current hysteresis is designed based on the nonlinear adaptive control theory,which applies the control strategy of Maximum Torque Per Ampere in the constant-torque region to enhance the output capability and the flux-weakening control law in the high speed region to enlarge the speed regulation range. It has better robustness and suppresses the parameter fluctuation effectively. Simulative results show its correctness and effectiveness.