汽车发电机极弧系数对转子涡流损耗的影响  

Influence on Rotor Eddy Current Loss in Claw Pole Alternator of Pole-Arc Coefficient

作　　者：魏琼[1] 鲍晓华[1] 李佳庆[1] 杨帆[1] 

机构地区：[1]合肥工业大学,合肥230009

出　　处：《微特电机》2015年第3期27-29,37,共4页Small & Special Electrical Machines

基　　金：国家自然科学基金项目(51177033;51377039)

摘　　要：汽车发电机爪极转子是整体结构,转子涡流损耗在铁耗中占有很大的比例,准确计算和分析转子涡流损耗至关重要。用基于棱边的求解器求解转子有限元涡流方程,计算和傅里叶分解了沿空间分布的径向气隙磁密,得出气隙中主要的谐波次数。计算和分析了转子涡流损耗,研究了爪极转子的涡流损耗密度分布。爪极转子是不等宽爪极,漏磁相对比较大,转子极弧系数影响气隙磁密和发电机的性能,计算和分析不同极弧系数的转子涡流损耗。并总结出在一定的极弧系数范围内,随着两爪极间距离的增大,涡流损耗减小,为研究高效率和低损耗的爪极发电机提供了一定的理论基础。The claw pole rotor in alternator is massive structure,and the rotor eddy- current loss accounts for a large proportion. Therefore,it is of crucial importance to calculate and analyze the rotor eddy- current loss accurately. Based on edge solver,finite- element eddy current equation was analyzed. The air gap flux density along spitial distribution was calculated and decomposed,and the main harmonic order in air gap was concluded. It calculated and analyzed the rotor eddy- current loss,and the distribution of eddy- current loss density was researched. The width of claw pole is not equality,and the leakage magnetic flux is relatively large,the pole arc coefficient of rotor has influence on air gap flux density and performance of generator. So,the rotor eddy- current loss of different pole arc coefficient was calculated and analyzed. It concludes that the eddy current loss is reduced with the increased distance of two claw electrode in a cnertain pole arc coefficient range,which provides a certain theoretical basis for researching low loss and high efficiency motor.

关 键 词：汽车发电机 气隙磁场 涡流损耗 极弧系数 

分 类 号：TM35[电气工程—电机]