基于精确线性化解耦的内置式永磁同步电机牵引系统

Exact Linearization Control of Inner Permanent Magnet Synchronous Motor Traction System with State Feedback

针对内置式永磁同步电机(inner permanent magnet synchronous motor,IPMSM)转速与电流之间的非线性耦合问题,应用非线性微分几何理论,通过非线性状态反馈和坐标变换,实现了IPMSM牵引系统的输入输出解耦控制和完全精确线性化,将原系统分解为两个线性子系统:转速线性子系统和励磁电流线性子系统。仿真结果表明,IPMSM牵引系统解耦线性化后采用最大转矩比电流控制(maximum torque per ampere control,MTPA)比id=0控制有更大的转矩输出能力;同时,基于输入输出线性化控制设计的IPMSM牵引系统比FOC控制PI调节具有更好的动态响应和稳态误差调节特性。

The decoupling control and full linearization of IPMSM system were realized with nonlinear state feedback and coordinates transformation. The IPMSM traction system is decomposed into two linear subsystems, d axis flax subsystem and rotation speed subsystem. Simulation results show that IPMSM traction system based on the design of input and output decoupling and linearization achieves high dynamic performance than the ordinary field oriented control （FOC）and the IPMSM traction system has better torque output ability using MTPA than the id=0.