[关键词]
[摘要]
针对永磁同步电机(PMSM)矢量控制中传统的PI控制鲁棒性差和传统的非奇异快速终端控制抖振较大、鲁棒性较差等问题,在速度环采用一种非奇异快速终端滑模(NFTSM)控制策略,同时引入一种高增益扩张观测器实时观测系统的匹配性扰动,将观测值作为电流的前馈补偿,提高了系统的抗干扰能力。在电流环应用一种无差拍电流预测控制策略,使电流环有更好的动态响应和更小的谐波分量。仿真结果表明,所提控制方法可有效改善系统鲁棒性差且滑模抖振过大的问题。
[Key word]
[Abstract]
Poor robustness of the traditional PI control, and chattering and less poor robustness of the traditional non-singular fast terminal control occur in permanent magnet synchronous motor (PMSM). To solve these problems, a non-singular fast terminal sliding mode (NFTSM) control strategy is adopted in the speed loop. In addition, a high gain extended observer is introduced to observe the matching disturbance of the system in real time. Then the observed value is used as feedforward compensation of the current, and the anti-disturbance capability of the system is improved. At the same time, a deadbeat current predictive control strategy is adopted in the current loop. Dynamic response is better and harmonic components are smaller in the current loop. Simulation results show that the proposed control method can effectively improve the robustness of the system and solve the problem of excessive sliding mode chattering.
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[基金项目]