采用变滞环PWM的开关磁阻电机直接瞬时转矩控制方法  

A Method for Direct Instantaneous Torque Control of Switched Reluctance Motor Using Variable Hysteresis Pulse Width Modulation

作　　者：张文港 张小平 ZHANG Wen'gang;ZHANG Xiaoping(National-Local Joint Engineering Laboratory of Marine Mineral Resources Exploration Equipment and Safety Technology,Hunan University of Science and Technology,Xiangtan 411201,Hu′nan,China;College of Information and Electrical Engineering,Hunan University of Science and Technology,Xiangtan 411201,Hu′nan,China)

机构地区：[1]湖南科技大学海洋矿产资源探采装备与安全技术国家地方联合工程实验室,湖南湘潭411201 [2]湖南科技大学信息与电气工程学院,湖南湘潭411201

出　　处：《机械科学与技术》2024年第5期858-864,共7页Mechanical Science and Technology for Aerospace Engineering

基　　金：湖南省自然科学省市联合基金项目(2021JJ50123)。

摘　　要：针对基于传统直接瞬时转矩控制的开关磁阻电机因采用固定滞环控制而存在转矩脉动仍然较大的问题,提出一种基于变滞环PWM的直接瞬时转矩控制方法。通过确定开关磁阻电机各相对应的工作区间,建立各区间相应的滞环函数并对函数中各参数进行优化,根据所得优化后的滞环函数及开关磁阻电机当前转子位置角以及相应的转矩偏差,提出采用变滞环PWM控制方法对其功率变换电路中相应功率开关进行控制,以达到对其转矩脉动进行抑制的目的,最后对其效果进行了仿真验证,同时与传统基于固定滞环的直接瞬时转矩控制方法进行了对比分析,结果表明:该方法不仅显著降低了开关磁阻电机的转矩脉动,而且有效提高了其运行效率,因而具有较好的应用价值。For the traditional switched reluctance motors(SRM)which are based on direct instantaneous torque control method,it is easy to have the problem of torque ripple when controlled by fixed hysteresis control method.To solve this problem,a new direct instantaneous torque control method based on variable hysteresis PWM is proposed.Firstly,the operation intervals of the SRM are determined,and then the hysteresis functions for each interval are set up and optimized.After that,based on the optimized hysteresis function,the current rotor position angle,and the corresponding torque deviation,a variable hysteresis PWM control method is proposed to control the switches of the power conversion circuit,so that the torque ripple is able to gets suppressed.Finally,simulations were conducted to verify the effectiveness of this method,and comparative analysis with the traditional fixed hysteresis-based direct instantaneous torque control method was also performed.Results show that the new method have huge application value.It can not only significantly reduce the torque ripple of the SRM,but also effectively improves its operational efficiency.

关 键 词：开关磁阻电机 直接瞬时转矩控制 变滞环函数 转矩脉动抑制 

分 类 号：TM352[电气工程—电机]