基于分段斩波控制的开关磁阻电机新型电流梯度法  

A novel phase current gradient method for SRM based on subsection chopping control

作　　者：朱礼峰 邵杰 王琦 ZHU Lifeng;SHAO Jie;WANG Qi(School of Engineering,Qufu Normal University,276826,Rizhao,Shandong,PRC)

机构地区：[1]曲阜师范大学工学院,山东省日照市276826

出　　处：《曲阜师范大学学报（自然科学版）》2024年第1期77-82,共6页Journal of Qufu Normal University(Natural Science)

基　　金：山东省自然科学基金(ZR2022ME136)。

摘　　要：针对开关磁阻电机传统电流梯度无位置传感器方法不适用中低速运行以及输出转矩低等问题,提出了一种电压斩波与电流斩波分段控制下的新型相电流梯度法.在检测到相电流峰值之前采用电压斩波控制方式,通过比较前后时刻相电流的大小确定相电流峰值,获得位置脉冲信号;检测到相电流峰值之后将控制方式切换为电流斩波控制,充分利用直流母线电压,进而获得更高的输出转矩.该无位置传感器方法适用的转速范围宽,不需要增加额外的硬件电路,并且能够提升电机在中低速度范围内的输出转矩.该文对所提方法进行了理论分析,并在此基础上进行了仿真和实验,结果验证了方法的可行性和有效性.In order to solve the problems of the traditional current gradient sensorless method of switched reluctance motor,which is not suitable for medium and low speed operation and low output torque,a new phase current gradient method based on voltage chopper and current chopper subsection control is proposed.The proposed scheme adopts the combined control mode of voltage chopping and current chopping,adopts the voltage chopping control mode before detecting the phase current peak value,determines the phase current peak value by comparing the magnitude of the phase current before and after,and obtains the position pulse signal.After the phase current peak is detected,the control mode is switched to current chopping control,which makes full use of the available DC bus voltage and can adjust the current to obtain higher output torque.The sensorless method is applicable to a wide speed range,does not need to add additional hardware circuits,and can improve the output torque of the motor in the medium and low speed range.In this paper,the proposed method is analyzed theoretically,and simulation and experiments are carried out on this basis.The results verify the feasibility and effectiveness of the method.

关 键 词：开关磁阻电机 分段斩波控制 相电流梯度法 转矩提升 

分 类 号：TM352[电气工程—电机]