摘要
针对目前开关磁阻电机采用单一解析模型进行在线转矩估算存在模型复杂、精度低的问题,提出一种基于分段解析建模的开关磁阻电机在线转矩估算方法。根据开关磁阻电机在一个电周期内磁链特性曲线的对称性及其定转子极弧的结构特点,提出将其半个电周期划分为5个区间,分别建立了每个区间的磁链与转矩简化解析模型,并通过有限元分析及构建基于DSP28335的实验系统分别对上述模型的估算精度与运算时间进行了验证,同时与传统单一解析模型进行了对比分析,结果表明,所提出的分段解析模型相较于传统单一解析模型,不仅有效提高了转矩估算精度,而且显著减少了运算时间,因而有助于提高开关磁阻电机调速系统的控制精度与动态性能,具有较好的应用价值。
Aiming at the problems of intricate model and low accuracy in online torque estimation of switched reluctance motor(SRM),a novel online torque estimation method based on piecewise analytical modelling is proposed.According to the symmetry of the flux linkage characteristics and the structural characteristics of the stator and rotor pole arc of the switched reluctance motor in one electrical cycle,a method of dividing the half electrical cycle into five intervals is proposed,and the flux linkage analytical model and torque analytical model of each interval are established respectively.The estimation accuracy and operation time of the above models are verified by finite element analysis and constructing an experimental system based on DSP28335.The results show that compared with the traditional single analytical model,the proposed partition analytical model not only effectively improves accuracy of torque estimation,but also significantly reduces the operation time,hence,it is helpful to improve the control accuracy and dynamic performance of switched reluctance motor speed control system,which has good application value.
作者
张文港
张小平
李俊乐
王易华
Zhang Wengang;Zhang Xiaoping;Li Junle;Wang Yihua(National-Local Joint Engineering Laboratory of Marine Mineral Resources Exploration Equipment and Safety Technology,Hunan University of Science and Technology,Xiangtan 411201,China;College of Information and Electrical Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)
出处
《电子测量与仪器学报》
CSCD
北大核心
2021年第11期163-169,共7页
Journal of Electronic Measurement and Instrumentation
基金
湖南省自然科学省市联合基金(2021JJ50123)项目资助。
关键词
开关磁阻电机
在线转矩估算
分段解析建模
对比分析
switched reluctance motor
online torque estimation
piecewise analytical modelling
comparative analysis
