电动汽车用永磁同步电机弱磁控制策略综述

结合电动汽车应用,分析了适合弱磁运行的永磁同步电机的结构特点,并在永磁同步电机的数学模型基础上,介绍了应用于矢量控制技术中不同的弱磁控制方法。受车载电源电压的限制,在转折速度以上,电机转速的提升必须依靠弱磁控制。为实现电机的最优使用,通常将弱磁区分为弱磁I区和弱磁II区,提出了多种基于电机模型和鲁棒控制的方法。综合近年来有关弱磁控制研究的发展现状,分类整理了弱磁I区和弱磁II区的弱磁控制方法,指出了各种方法的优缺点。最后,对电动汽车控制系统的最优设计的发展趋势进行了展望。

Overviews of Flux Weakening Control Schemes with Permanent Magnet Synchronous Motor Used in Electric Vehicles

Combined with electric vehicle(EV) applications, the structural characteristic for Flux Weakening(FW) operation of Permanent Magnet Synchronous Motor(PMSM) was analyzed in this paper, and based on the mathematical model of PMSM, this paper describes the different methods of Flux Weakening control applied in Vector Control. Limited by power supply voltage of vehicle, the increase of higher speed must rely on Flux Weakening control. In order to achieve optimal use of PMSM, scholars at home and board have proposed a variety of methods based on the model parameters or robust control, with the Flux Weakening region subdivided into FW region I and FW region II. The paper summarizes the research results in recent years, and sorts various control methods in FW region I and FW region II, with advantages and disadvantages stated. Finally, the development trend of electric vehicle control system optimal design in the future was briefly discussed.