永磁同步电机弱磁失控机制及其应对策略研究.pdfVIP

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