PWM逆变器供电引起的轴向磁通非晶电机谐波损耗的解析计算  

Analytical Calculation of Harmonic Losses of an Axial Flux Amorphous Motor Caused by PWM Inverter Supplying

作　　者：朱龙飞[1] 朱建国[2] 佟文明[1] 韩雪岩[1] Zhu Longfei;Zhu Jianguo;Tong Wenming;Han Xueyan(National Engineering Research Center for Rare-Earth Permanent Magnetic Machines Shenyang University of Technology Shenyang 110870 China;School of Electrical Mechanism and Mechatronic Systems University of Technology Sydney NSW 2007 Australia)

机构地区：[1]国家稀土永磁电机工程技术研究中心(沈阳工业大学),沈阳110870 [2]悉尼科技大学电气机械和机电系统学院

出　　处：《电工技术学报》2017年第16期115-123,共9页Transactions of China Electrotechnical Society

基　　金：国家重点研发计划(2016YFB0300500);国家科技支撑计划(2013BAE08B00);国家自然科学基金(51307111);辽宁省教育厅科学技术研究项目(L2013049)资助

摘　　要：非晶合金材料具有出色的低损耗特性,适于用作高频电机的铁心,但PWM逆变器供电会导致高频电机谐波损耗严重增加。在电机初始设计阶段,快速准确计算出谐波损耗是轴向磁通非晶合金永磁电机设计及优化的关键。针对3D时步有限元计算耗时长的问题,改进现有多环等效模型的计算方法,推导了考虑PWM逆变器供电高次谐波电流影响的气隙磁通密度解析计算方法,并在此基础上推导了定子铁心损耗及考虑涡流反作用影响的转子涡流损耗的解析计算方法。将谐波损耗的解析计算值与样机实验值以及3D有限元计算值进行对比,结果显示谐波损耗的平均计算误差仅为9.69%,解析模型具有较高的计算精度。Amorphous alloys are considered as an appropriate core material for high-frequency motors because of their outstanding low power loss characteristics.When supplied by a PWM inverter,however,the harmonic losses of high-frequency motors will enormously increase.The key for designing and optimizing an amorphous alloy axial-flux permanent magnet motor is the fast and accurate calculation of harmonic losses during the original designing stage.In this paper,because of the large time consuming of three dimensional time step finite element analysis method,the present multilayer coupled model is further improved.An analytical method of air gap flux density is derived which can take high order carrier harmonics into account.The analytical methods of stator core losses and rotor eddy current losses are then deduced in consideration of the influence of eddy current reaction.The analytical calculation results of harmonic losses are compared with measured results and those obtained by the three dimensional FEA method.It is shown that the average calculation error of rotor losses is9.69%,which means the improved analytical method features in high accuracy.

关 键 词：非晶合金 轴向磁通永磁电机 PWM逆变器 谐波损耗 解析方法 

分 类 号：TM351[电气工程—电机]