电工技术学报  2018, Vol. 33 Issue (18): 4239-4248    DOI: 10.19595/j.cnki.1000-6753.tces.171509
电机及其控制 |
一种减小无刷直流电机转子涡流损耗以及铜耗的驱动方法
谭博, 张海涛, 华志广, 刘卫国, 骆光照
陕西省微特电机及驱动技术重点实验室(西北工业大学) 西安 710072
A Drive Method of Brushless DC Motor to Decrease Rotor Eddy Current Loss and Copper Loss
Tan Bo, Zhang Haitao, Hua Zhiguang, Liu Weiguo, Luo Guangzhao
Shaanxi Key Laboratory of Small & Special Electrical Machine and Drive Technology Northwestern Polytechnical University Xi’an 710072 China
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摘要 基于三相六状态方波驱动方法的无刷直流电机电流谐波较高,转子涡流损耗较大,易造成永磁体过热不可逆退磁。同时,较大的铜耗易导致电机绕组温升过高,降低电机可靠性。提出一种基于电流规划的无刷直流电机驱动方法,该方法以三相反电动势作为状态变量,以电机转矩作为限定条件,以三相电流有效值最小作为优化目标,得出两相电流的理论给定解析值,并与两相反馈电流组成电流闭环。分析和仿真表明,与方波驱动方法相比,该驱动方法能使转子涡流损耗以及绕组铜耗明显减小。最后,以一个82W的无刷直流电机为对象搭建测试电路和转子涡流损耗模型,对所提出的方法进行验证。
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谭博
张海涛
华志广
刘卫国
骆光照
关键词 无刷直流电机电流规划铜耗涡流损耗    
Abstract:The stator currant harmonics of brushless DC motor (BLDCM) are high in the square-wave drive method, which will increase rotor eddy-current loss and further raise the risk of rotor permanent magnet overheated demagnetization. The reliability of motor is also reduced. A novel method based on current planning for the BLDCM is proposed. In the method, the back-electromotive force (EMF) is considered as the state variable, the reference torque as a constraint condition, and the minimum phase currents as the optimization objectives. Then, the reference currents can be calculated. The current loop consists of the reference currents and two phase feedback currents. Analysis and simulations show that the rotor eddy-current loss and copper loss are lower than those of the square-wave drive method. Finally, taking an 82W BLDCM as the object, the model of rotor eddy-current loss and the test circuit are built to verify the proposed method.
Key wordsBrushless DC motor (BLDCM)    current planning    copper loss    eddy-current loss   
收稿日期: 2017-11-06      出版日期: 2018-09-26
PACS: TM351  
基金资助:陕西省国际科技合作与交流重点研发计划项目(2017KW-ZD-05)和陕西省重点研发计划(2017GY­048)资助
通讯作者: 张海涛 男,1988年生,博士研究生,研究方向为电机系统及其控制。E-mail: zhanghaitao@mail.nwpu.edu.cn   
作者简介: 谭 博 男,1983年生,博士,助理研究员,研究方向为电机系统及其控制。E-mail: tanbo345@163.com
引用本文:   
谭博, 张海涛, 华志广, 刘卫国, 骆光照. 一种减小无刷直流电机转子涡流损耗以及铜耗的驱动方法[J]. 电工技术学报, 2018, 33(18): 4239-4248. Tan Bo, Zhang Haitao, Hua Zhiguang, Liu Weiguo, Luo Guangzhao. A Drive Method of Brushless DC Motor to Decrease Rotor Eddy Current Loss and Copper Loss. Transactions of China Electrotechnical Society, 2018, 33(18): 4239-4248.
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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.171509          https://dgjsxb.ces-transaction.com/CN/Y2018/V33/I18/4239