内置式永磁同步电机滑模弱磁控制

Flux Weakening Control of Interior Permanent Magnet Synchronous Motor Based on Slide Mode Controller

针对内置式永磁同步电机(IPMSM)的电感和磁链参数随电流和温度变化对弱磁控制性能的影响问题,提出了一种基于滑模变结构控制的永磁同步电机弱磁控制策略。该控制策略在采用对电机参数不敏感的电压反馈弱磁结构的同时,提出了一种滑模弱磁控制调节器结构。通过对该控制器结构的理论分析推出其本质上是一个非线性变参数积分器。相较线性积分器结构,该控制器结构兼具较快的动态响应速度及较好的稳态性能。最后通过仿真和实验证明了所提控制策略的可行性和稳定性。

The inductance and flux linkage of interior permanent magnet synchronous motor（IPMSM） are vulnerable to variations caused by the change of operating conditions including current and temperature, which inevitably influences the performance of the flux-weakening control.An improved slide mode flux-weakening control scheme is proposed to avoid performance degradation due to variations of motor parameters.The proposed control scheme is founded on flux- weakening control method with feedback compensation and it is implemented by a slide mode controller.The slide mode controller, though theoretical analysis, is proved to be a nonlinear parameter-variant integrator in essence, which exhibits faster dynamic response and better steady state performance than the conventional linear integrator.Simulation and experimental results are presented to verify feasibility and validity of the proposed control scheme.