Bearing Capacitance Estimation of Electric Vehicle Driving Motor

2018 1st International Conference on Environment Prevention and Pollution Control Technology

生态环境科学

Zhu, Xianhui^1,2 ; Shi, Nan^3 ; Li, Yidan^1 ; Yang, Ying^1 ; Wang, Xinrui^1

School of Electrical and Control Engineering, Heilongjiang University of Science and Technology, Harbin, China^1

School of Measurement-Control Tech and Communications Engineering, Harbin Institute of Technology, Harbin

150040, China^2

Engineering Training and Basic Experimental Center, Heilongjiang University of Science and Technology, Harbin, China^3

关键词: Bearing currents;    Capacitance estimation;    Centrifugal Forces;    Estimation results;    Load distributions;    Oil film thickness;    Permanent magnet motor;    Rolling elements;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/199/3/032065/pdf
DOI  :  10.1088/1755-1315/199/3/032065

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The bearing capacitance and bearing voltage are the main causes of the failure of the driving motor bearing in the electric vehicle powered by the PWM inverter. It has an important influence on the driving safety of the electric vehicle, and is very important to calculate the bearing voltage and bearing current accurately. Taking 6006 ball bearings in 25KW permanent magnet motor as an example, this paper analyzes the load of each rolling element under the action of gravity, unilateral magnetic pull and centrifugal force. Then this paper discusses the effect of load distribution and speed on the contact area and oil film thickness between each rolling element and the raceway. And the estimation results of bearing capacitance at different speeds are given out. It could provide a reference basis for the life calculation and reliability analysis of the motor bearing in electric vehicle.