永磁同步电机弱磁转矩响应速度提升策略  

Improving the Flux⁃weakening Torque Response Speed Strategy of Permanent Magnet Synchronous Motor

作　　者：陈伟康 王海鑫 张智勇 陈震宇 沈捷 CHEN Weikang;WANG Haixin;ZHANG Zhiyong;CHEN Zhenyu;SHEN Jie(School of Electrical Engineering,Shanghai Dianji University,Shanghai 200120,China;Leadrive Technology(Shanghai)Co.,Ltd.,Shanghai 200120,China)

机构地区：[1]上海电机学院电气学院,上海200120 [2]臻驱科技(上海)有限公司,上海200120

出　　处：《电气传动》2024年第11期4-10,18,共8页Electric Drive

摘　　要：弱磁控制技术能够有效地拓宽永磁同步电机运行速度范围,因此对永磁同步电机弱磁控制的研究具有重要意义。大多弱磁控制通过单一的PI环节修正弱磁电流指令,其响应速度较慢,难以满足高性能的控制需求,且由于弱磁环的高耦合、非线性,PI参数整定困难。针对以上不足提出一种折算查表的方法作为前馈加入到控制系统中,加快了弱磁调节的速度;同时采用增益线性化的方法,通过分析不同工作点处小信号模型的变化,解决了通过经验整定的弱磁环控制器的固定PI参数无法应对工作点变化的问题,从而提高了系统的稳定性和准确性。最后根据仿真和实验验证了改进的方法,能够有效提升弱磁控制的性能。Flux-weakening control technology can effectively broaden the speed range of the permanent magnet synchronous machine(PMSM),therefore,it is of great significance to the research on the flux-weakening control of permanent magnet synchronous machine.Most of flux-weakening modified the flux-weakening current command through a single PI link,and its response speed is slow and difficult to meet the high-performance control requirements,and due to the high coupling and nonlinearity of the flux-weakening loop,PI parameters setting is difficult.In order to solve the above shortage,a method of using a conversion look-up table was proposed to be added to the control system as a feedforward,having accelerated the speed of flux-weakening adjustment.While,the method of gain linearization was adopted,by analyzing the changes of the small signal model at different operating points,it solved the problem that the fixed PI parameters of the flux-weakening loop controller that have been set by experience cannot cope with the change of the operating point,which improved the stability and accuracy of the system.Finally,according to the simulation and experiments,it was verified that the improved method can improve the performance of flux-weakening control.

关 键 词：永磁同步电机 弱磁控制 查表法 小信号模型 增益线性化 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]