隐极发电机转子匝间短路时转子不平衡磁拉力的解析计算模型

摘要

The multi-loop method is applied to calculate the stator current and rotor current of non-salient pole generator with rotor inter-turn short circuit,based on which,the air-gap magnetic field during the fault is analyzed according to the actual formation of generator loops and the calculation model of air-gap magnetomotive force and flux density is deduced.The rotor unbalanced magnetic pull is obtained by solving the Maxwell stress integral.The rotor inter-turn short circuit test is carried out for a prototype generator with one pair of non-salient poles and the results show the correctness of the proposed calculation model.The results calculated by the proposed model are compared with the results of ANSYS simulation,which shows that,with shorter computation time,the proposed calculation model has higher efficiency.%采用多回路法计算发生转子匝间短路故障时隐极发电机的定、转子电流,基于计算结果,按照发生转子匝间短路故障时电机各回路的实际构成方式,对故障时的气隙磁场进行了分析,得出气隙磁动势和磁密的计算模型;通过求解Maxwell应力的积分,得到转子不平衡磁拉力.对一台1对极隐极模拟样机进行转子匝间短路实验,实验结果验证了计算模型的正确性;将所提计算模型得到的结果与ANSYS仿真结果进行对比,结果证明所提计算模型具有耗时短、效率高的优点.