一种结构简化的BLDCM DTC  

A kind of BLDCM DTC with simplified structure

作　　者：魏海峰[1] 李萍萍[1] 刘国海[2] 贾洪平[2] 

机构地区：[1]江苏大学现代农业装备与技术省部共建教育部重点实验室/江苏省重点实验室,江苏镇江212013 [2]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2009年第6期606-609,共4页Journal of Jiangsu University：Natural Science Edition

基　　金：教育部博士点基金资助项目(20050299009);江苏省自然科学基金资助项目(BK2007094);江苏省研究生培养创新工程资助项目(CX07B_117z)

摘　　要：针对无刷直流电机直接转矩控制(BLDCMDTC)中磁链观测控制困难、转矩估算复杂等问题,提出了一种结构简化的BLDCMDTC方案.建立了无刷直流电机的数学模型;新方案在电机恒转矩区运行时,采用反电势形状函数法简化了电磁转矩的计算,仅根据转矩滞环输出和当前转子磁链所在扇区选择空间电压矢量;并应用于选定无刷直流电机进行了仿真和试验.结果表明该方案可行有效,控制结构简单,保持了直接转矩控制固有的转矩动态响应快的优点,且易于工程实现.To solve those problems such as difficulty in observing and controlling flux linkage,and complexity of estimating torque in brushless DC motors （BLDCM） direct torque control （DTC）,a novel scheme was proposed. Mathematic model of BLDCM was established. The back electromotive force shape function method was adopted to simplify electromagnetic torque calculation when the torque was invariable. The proper stator voltage space vector was selected according to the output of the torque hysteresis controller and the current rotor flux sector. Simulation and experiments on a selected BLDCM were carried out. The results show that this scheme is simple and effective,and it is easy to realize in the industrial application,while to keep the fast torque response.

关 键 词：无刷直流电机 直接转矩控制 空间电压矢量 电磁转矩 滞环控制 

分 类 号：TM301.2[电气工程—电机]