Modeling and Measurement of Bearing Voltage in Traction Motor for High Speed Train

The modeling and measurement of bearing voltage in traction motor is helpful to evaluate the potential electrical corrosion risk and the effectiveness of suppression measures. This paper presents a method of modeling and simulation of bearing voltage in traction motor considering multi-system coupling. Firstly, the generation mechanism and influencing factors of bearing voltage are analyzed. Then, a train multi-system coupling model construction method considering the key factors is proposed. Taking CRH380B as an example, the system simulation model was constructed, and the event-driven simulation method was adopted to reduce the simulation time. Finally, the accuracy of the model is verified according to the actual line measurement results of the bearing voltage of the high speed train.