高转矩密度转子磁分路混合励磁电机转子涡流损耗及散热优化  

Optimization of Rotor Eddy-current Loss and Heat Dissipation for High Torque Density Hybrid Excitation Synchronous Motor With Magnetic Shunting Rotor

作　　者：王晨[1] 张卓然[1] 刘业[1] WANG Chen;ZHANG Zhuoran;LIU Ye(Center for More-Electric-Aircraft Power System(Nanjing University of Aeronautics and Astronautics),Nanjing 211106,Jiangsu Province,China)

机构地区：[1]多电飞机电气系统工信部重点实验室(南京航空航天大学),江苏省南京市211106

出　　处：《中国电机工程学报》2021年第21期7476-7485,共10页Proceedings of the CSEE

基　　金：中央高校基本科研业务费专项资金(NC2019001);江苏省重点研发计划项目(BE2017160)。

摘　　要：转子磁分路混合励磁电机转子通常采用实心磁极的结构,导致其转子涡流损耗大、转子温度高,限制了其转矩密度及效率的进一步提升。从降低转子磁分路混合励磁电机的转子涡流损耗及温升两个角度出发,首先分析永磁体分段与模块化转子结构对转子涡流损耗的影响规律,并进行优化设计;在此基础上,根据传热学基本理论,构建电机的三维稳态温度场计算模型,揭示了不同运行工况下电机的温度分布规律,提出一种机壳水冷和端盖水冷相结合的多水道冷却散热方法。结果表明,在峰值转速运行工况下,新型散热方法使得转子实心磁极的最高温升从175℃降低至136℃,进一步提升电机的输出能力及可靠性。最后,对100kW转子磁分路混合励磁电机样机进行效率与温升实验,实验验证了理论计算和所提方法的正确性和有效性。Hybrid excitation synchronous machine(HESM)with magnetic shunting rotor adopts the solid rotor,which results the large rotor eddy-current loss of rotor and high rotor temperature,and the torque density and efficiency is limited.This paper was from two points of view,one was reducing the rotor eddy-current loss,the other was reduce the machine temperature.At first,the influence of PM segmentation and modular rotor on eddy-current loss were analyzed and optimized.The 3-D temperature field calculation model of machine was established based on the heat transfer theory,and the temperature distribution of the motor under different conditions was revealed.Meanwhile,in order to reduce the temperature level for solid rotor and exciting winding,and the heat conduction combining water cooling of the case with water cooling of the end cover was proposed.The results shows that the highest temperature of solid rotor reduces from 175℃to 136℃on the condition of maximum speed,and the output capacity and reliability of motor are improved.A 100kW HESM prototype is successfully manufactured and tested to validate the analyses.

关 键 词：高转矩密度 混合励磁同步电机 转子磁分路 转子涡流损耗 三维温度场 散热优化 

分 类 号：TM30[电气工程—电机]