车用永磁同步电机变指数滑模控制研究

Research on Variable Exponent Sliding Mode Control of Permanent Magnet Synchronous Motor for Electric Vehicles Application

为了提高车用永磁同步电机在模型参数和外界干扰等不确定性因素影响下的电机调速性能,设计一种改进型的滑模控制器。利用变指数趋近律削减滑动模态过程中的抖振,采用微积分项提高系统的鲁棒性,能较高精度的完成速度跟踪控制,并对所设计的控制器进行稳定性和可达性分析。将控制策略嵌入永磁同步电机的速度控制环中,在恒转速和新欧洲行驶工况两个条件中进行仿真实验。结果表明,改进型的滑模控制器具有精确的跟踪控制和高效的响应能力。

In order to improve the speed control performance of permanent magnet synchronous motor（ PMSM） for electric vehicle（ EV） with different uncertainties and disturbances,an improved sliding mode control（ ISMC） was proposed in this paper. A variable exponent reaching law was applied to reduce to the chattering in the reaching process,the integral and derivative were employed to enhance the robustness of the system and maintain high tracking performance,then the analysis of the stability and accessibility for the controller was certificated. The design was implemented to the speed loop of the PMSM system,and the simulation was adopted under the conditions of the fixed speeds and new European driving cycle（ NEDC）. The results show that the design with the ISMC represents high capability of the high accuracy tracking and the fast response for speed.