一种抑制开关磁阻电机转矩脉动的电流控制方法  

Current control method to suppress SRM torque ripple

作　　者：孟繁贵 张文鹏 刘爱民[1] 王宇琛 张红奎[1,3] MENG Fan-gui;ZHANG Wen-peng;LIU Ai-min;WANG Yu-chen;ZHANG Hong-kui(College of Electrical Engineering,Shenyang University of Technology,Shenyang 110870,China;College of Mechanical Engineering,Shenyang University of Technology,Shenyang 110870,China;China Coal Technology Engineering Group Shenyang Research Institute Co.,Ltd.,Shenyang 110066,China)

机构地区：[1]沈阳工业大学电气工程学院,辽宁沈阳110870 [2]沈阳工业大学机械工程学院,辽宁沈阳110870 [3]中煤科工集团沈阳研究院有限公司,辽宁沈阳110066

出　　处：《电机与控制学报》2022年第9期49-56,共8页Electric Machines and Control

基　　金：国家自然科学基金(51777131);辽宁省科学技术计划项目(2021-KF-14-03)。

摘　　要：本文提出一种无需反馈瞬时转矩和计算开通、关断角,即可降低开关磁阻电机转矩脉动的电流控制方法。该方法借鉴同步电机的dq轴控制思想,根据开关磁阻电机的电流、电感特性将参考电流非负处理和修正,以保持输出转矩的平稳。为保证电机的系统效率,减少转速较高时因续流产生的负转矩,采用电流前移法,通过模糊算法调整移动角,进一步完善参考电流。搭建三相9/6极开关磁阻电机仿真系统和实验平台,实现传统电流控制和提出的电流控制,对这两种控制方式在不同转速下的开关磁阻电机转矩脉动进行对比和分析。仿真和实验结果表明,提出的电流控制方法在开关磁阻电机中低速运行时均可有效降低27%~34%的转矩脉动。A current control method was proposed that can reduce the torque ripple of the switched reluctance motor without feedback of the instantaneous torque and calculation of the turn-on and turn-off angles. This method draws on the dq-axis control idea of the synchronous motor, and non-negative processing and correction of the reference current according to the current and inductance characteristics of the switched reluctance motor to keep the output torque stable. In order to ensure system efficiency of the motor and reduce the negative torque caused by freewheeling at higher speeds, the current forward method was adopted, and the moving angle was adjusted through the fuzzy algorithm to further improve the reference current. The simulation model and experimental platform for a three-phase 9/6-pole switched reluctance motor were built, and the traditional current control and the proposed current control method were realized. The torque ripple of switched reluctance motor at different speeds was compared and analyzed under these two control methods. The simulation and experimental results show that, the proposed current control method can effectively reduce the torque ripple by 27%-34% when the switched reluctance motor runs at medium and low speeds.

关 键 词：开关磁阻电机 dq轴控制 系统效率 电流前移 模糊算法 移动角 

分 类 号：TM352[电气工程—电机]