1. School of Electrical and Electronic Engineering, Huazhong University of Science and Technology,State Key Laboratory of Advanced Electromagnetic Technology,Wuhan,China,430074
2. Xiangyang CRRC Motor Technology Co., Ltd.,Xiangyang,China,441000
3. Guangzhou Metro Group Co., Ltd,Guangzhou,China,510330
4. Zhuzhou CRRC Times Electric Co., Ltd.,Zhuzhou,China,412001