磁钢充磁方式对永磁电机转子涡流损耗研究
|
摘要
为研究不同的充磁方式对永磁电机转子涡流损耗的影响,以一台6极18槽高速永磁无刷直流电动机为例,分析了径向充磁和平行充磁两种永磁体结构,建立了高速永磁电机的有限元分析模型和转子涡流损耗计算模型,采用时步有限元法分析电机在不同充磁方式下的电磁场特征,进而对两种结构电机在三种不同工作条件下的转子涡流损耗进行对比分析,最后进一步对不同极槽配合下转子涡流损耗进行分析。结果表明:空载条件下,采用径向充磁方式,高速电机转子涡流损耗较小;随着负载增加,采用平行充磁的方式,电机的转子涡流损耗更小。该研究对降低永磁电机的转子涡流损耗及性能优化具有一定的参考价值。
To analyze the influence of different magnetization methods on the eddy current loss of permanent magnet motor rotor,a high speed PM BLDC motor of 6-pole,18-slot was presented,and two kinds of radial magnetization and parallel magnetization were analyzed. A finite element analysis model and a calculation model of rotor eddy current loss for the motor were established. With the time-step finite element method,electromagnetic field characteristics of the motor in different magnetization modes were simulated. Then the two kinds of structure motors were tested in three different working conditions,and the rotor eddy current loss was compared and analyzed. The eddy current losses of the rotor with different pole slots were further analyzed.The results show that the parallel magnetizing method can increase the air gap flux density,reduce the eddy current loss and make the running performance more stable. The study provides a reference for reducing the eddy current loss and optimizing performance of permanent magnet motor.
To analyze the influence of different magnetization methods on the eddy current loss of permanent magnet motor rotor,a high speed PM BLDC motor of 6-pole,18-slot was presented,and two kinds of radial magnetization and parallel magnetization were analyzed. A finite element analysis model and a calculation model of rotor eddy current loss for the motor were established. With the time-step finite element method,electromagnetic field characteristics of the motor in different magnetization modes were simulated. Then the two kinds of structure motors were tested in three different working conditions,and the rotor eddy current loss was compared and analyzed. The eddy current losses of the rotor with different pole slots were further analyzed.The results show that the parallel magnetizing method can increase the air gap flux density,reduce the eddy current loss and make the running performance more stable. The study provides a reference for reducing the eddy current loss and optimizing performance of permanent magnet motor.
引文
[1]谭建成.永磁无刷直流电机技术[M].北京:机械工业出版社,2011:5-11.
[2]鲍晓华,梁娜,方勇,等.定子槽开口对感应电机转子涡流损耗的影响[J].电机与控制学报,2015,19(11):17-24.
[3]周凤争.高速永磁无刷直流电机转子涡流损耗的研究[D].杭州:浙江大学,2008.
[4]YU Y,LIANG D,LIU X,et al.The influence on the rotor loss of the high-speed motor by optimizing the rotor structure[C]//Eleventh International Conference on Ecological Vehicles&Renewable Energies.IEEE,2016.
[5]王晓远,秦庆雷,王耕籍.转子结构对高速永磁电机转子损耗影响分析[J].微电机,2016,49(6):1-4.
[6]魏琼,鲍晓华,李佳庆,等.汽车发电机极弧系数对转子涡流损耗的影响[J].微特电机,2015,43(3):27-31.
[7]李延升,窦满峰,骆光照.不同充磁方式的对转永磁电机气隙磁场性能研究[J].四川大学学报:工程科学版,2014,46(1):140-147.
[8]唐任远.现代永磁电机理论与设计[M].北京:机械工业出版社,2015:76-77.
[9]PHYU H N,QUAN J.Analysis of rotor eddy current loss with different magnetization directions in PM BLDC motor[C]//International Conference on Electrical Machines and System.IEEE,2016.
[2]鲍晓华,梁娜,方勇,等.定子槽开口对感应电机转子涡流损耗的影响[J].电机与控制学报,2015,19(11):17-24.
[3]周凤争.高速永磁无刷直流电机转子涡流损耗的研究[D].杭州:浙江大学,2008.
[4]YU Y,LIANG D,LIU X,et al.The influence on the rotor loss of the high-speed motor by optimizing the rotor structure[C]//Eleventh International Conference on Ecological Vehicles&Renewable Energies.IEEE,2016.
[5]王晓远,秦庆雷,王耕籍.转子结构对高速永磁电机转子损耗影响分析[J].微电机,2016,49(6):1-4.
[6]魏琼,鲍晓华,李佳庆,等.汽车发电机极弧系数对转子涡流损耗的影响[J].微特电机,2015,43(3):27-31.
[7]李延升,窦满峰,骆光照.不同充磁方式的对转永磁电机气隙磁场性能研究[J].四川大学学报:工程科学版,2014,46(1):140-147.
[8]唐任远.现代永磁电机理论与设计[M].北京:机械工业出版社,2015:76-77.
[9]PHYU H N,QUAN J.Analysis of rotor eddy current loss with different magnetization directions in PM BLDC motor[C]//International Conference on Electrical Machines and System.IEEE,2016.