开槽实心转子电机转子端部系数的计算与比较  

Calculation and Comparison of Rotor End Factors of Solid Rotor Induction Machines with Axial Slits

作　　者：黄子果 王善铭[1] 孙宇光[1] 曹海翔[1] 杨占录[1,2] 

机构地区：[1]电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系),北京100084 [2]海军潜艇学院,青岛266100

出　　处：《电工技术学报》2017年第15期59-65,共7页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金项目(51177077);国家科技支撑计划项目(2014BAA04B02)资助

摘　　要：开槽实心转子异步电机转子的三维非线性涡流场计算量大,常采用二维有限元结合光滑实心转子端部系数的方法简化计算。但在转差率增大时,采用光滑转子端部系数仿真计算的误差明显增大。根据开槽实心转子涡流分布随转差率变化的规律,提出适用于全转差率范围的开槽转子端部系数。依据该端部系数修正转子电阻率,并采用非线性有限元计算开槽实心转子电机电磁场,可考虑转子端部效应以及定、转子铁心磁路饱和的影响。在不同工况下,对两台不同转子槽数的开槽实心转子样机分别采用不同转子端部系数进行仿真计算,并与实验结果比较。该文提出的开槽转子端部系数的仿真与实验结果较吻合,且在转差率较大时,开槽转子端部系数随转子槽数增多而增大。可为准确计算开槽实心转子电机参数及其设计优化提供依据。When the nonlinearity of rotor magnetic circuit is taken into account, the huge computation of 3D finite element calculation of slitted solid rotor magnetic field is unavoidable. To simplify the calculation, the 2D FEM combined with end factors of smooth solid rotor is adopted generally. However, the calculation error increases along with the increase of slip when applying end factors of smooth solid rotor for the slitted rotor. This paper puts forward a new rotor end factor for slitted solid rotor using an approximate calculation method due to the eddy current distribution in the slitted rotor. With the 2D FEM and the raised end factor, the effect of saturation in both stator and rotor core and the axial finite length of rotor are taken into account. The calculation results using different smooth rotor end factors and the raised slitted rotor end factor are compared with each other. And the simulation results using slitted rotor end factor agree well with the experimental test results on model machines with different number of rotor slitted. This indicates the raised slitted rotor end factor is suitable for the parameter calculation and optimal design of slitted solid-rotor induction machine.

关 键 词：开槽实心转子 端部系数 二维有限元 

分 类 号：TM346[电气工程—电机]