1. Key Laboratory of Vehicle Tools and Equipment, Ministry of Education, East China Jiaotong University, Nanchang 330013, China
2. The State Key Laboratory of Heavy-Duty and Express High-Power Electric Locomotive, No. 1 Tianxin Road, Shifeng District, Zhuzhou 412001, China
3. School of Locomotives and Rolling Stock, Zhengzhou Railway Vocational and Technical College, Zhengzhou 451460, China