永磁同步电机弱磁失控机制及其应对策略研究永磁同步电机弱磁失控机制及其应对策略研究.pdf

第 31 卷 第 18 期 中 国 电 机 工 程 学 报 Vol.31 No.18 Jun.25, 2011 2011 年 6 月 25 日 Proceedings of the CSEE ©2011 Chin.Soc.for Elec.Eng. 67 文章编号：0258-8013 (2011) 18-0067-06 中图分类号：TM 351 文献标志码：A 学科分类号：470·40 永磁同步电机弱磁失控机制及其应对策略研究 朱磊，温旭辉，赵峰，孔亮 ( 中国科学院电工研究所，北京市 海淀区 100190) Control Policies to Prevent PMSMs From Losing Control Under Field-weakening Operation ZHU Lei, WEN Xuhui, ZHAO Feng, KONG Liang (Institute of Electrical Engineering Chinese Academy of Sciences, Haidian District, Beijing 100190, China) [1-2] ABSTRACT: Field-weakening technology is important for 80 年代中期 ，并于 90 年代初形成了完善的弱磁 permanent magnet synchronous machine (PMSM) control in 理论[3-4] 。由于永磁同步电机的参数变化导致电流规 wide speed range applications. In deep field-weakening 划困难[5]，学者们一直在研究弱磁控制策略[6-8]，以 operation, saturation of current regulators may lead to losing 期达到不断扩大电机恒功率运行的转速范围，同时 control and even damages. This paper analyzed the reason why 保持较高的工作效率的目的。 current saturation happens for conventional field-weakening 弱 磁 控 制 策 略 通 常 基 于 磁 场 定 向 控 制 algorithm. It is concluded that precise limitation of d-axis (field-oriented control ，FOC)和最大转矩电流比 current is necessary to keep the system under control. New control algorithm is proposed to prevent losing control from (maximum torque per ampere，MTPA)控制[9] 。FOC happening. It is verified by experimental result that the speed 控制的关键在于 d 轴和 q 轴两个电流调节器的设 [10] range of PMSM is enhanced by the proposed field-weakening 计 ，MTPA 控制则用于低转速运行时提高电机效