高速内置式永磁电机转子机械强度研究  

Study on rotor mechanical strength of high speed interior permanent magnet motor

作　　者：佟文明[1] 次元平 

机构地区：[1]沈阳工业大学国家稀土永磁电机工程技术研究中心,辽宁沈阳110870

出　　处：《电机与控制学报》2015年第11期45-50,共6页Electric Machines and Control

基　　金：国家自然科学基金(51307111);国家科技支撑计划项目(2013BAE08B00);辽宁省教育厅科学技术研究项目(L2013049)

摘　　要：为了研究高速内置式永磁电机转子机械强度,根据受力平衡原理,推导了极端情况下内置式高速永磁电机转子隔磁桥最大应力的解析计算公式。利用该解析公式和有限元方法分别分析了隔磁桥宽度对最大应力的影响规律,得到解析解和有限元计算结果最大偏差在7.5%以内,证明了解析推导的正确性。通过将永磁体沿圆周方向进行分段,增加隔磁桥的数量,将应力分散到多个隔磁桥上,以减小应力最大值。利用有限元方法分析了永磁体不分段、分两段和分三段时转子强度和空载漏磁因数,通过与未分段进行对比,永磁体分两段和分三段时隔磁桥最大应力分别减小58.5%和71.2%,而空载漏磁因数随着分段数增加而增大。In order to study the rotor mechanical strength of a high speed interior permanent magnet motor（ IPM）,analytic calculation formula for maximum stress of magnetic barrier in extreme cases was derived based on the force balance principle. The influence law of magnetic barrier width on maximum stress was analyzed on the basis of the proposed analytical calculation formula and finite element method. The maximum deviation between analytical calculation results and finite element method results was within 7. 5%,which verified the correctness of the analytical derivation. The permanent magnet was segmented along the circumference direction to increase the number of magnetic barrier,so that the maximum stress was decreased. The mechanical strength and no load magnetic leakage factor were analyzed by finite element method in the case of permanent magnet without segmentation,being divided into 2 segments and being divided into 3 segments. Compared with the unsegmented condition,the maximum stress of magnetic barrier can be reduced by 58. 5% for 2 segments,and 71. 2% for 3 segments. The no load magnetic leakage factor increases with the increase of magnet segments.

关 键 词：内置式永磁电机 高速 隔磁桥 机械强度 漏磁因数 

分 类 号：TM315[电气工程—电机]