Modeling for Capacitive Shaft voltage of EV Drive System

This article firstly models high-frequency and low-frequency signals based on their different characteristics, and then proposes a model and an estimation method for predicting the capacitive shaft voltage of electric vehicle electric drive systems without power supply. Then, based on the shaft voltage model, the influence of two mainstream transmissions is further considered, and an equivalent circuit model of the transmission is established, which can obtain the shaft voltage estimation of the transmission shaft and motor shaft, and realize the shaft voltage modeling and calculation of the overall drive system of electric vehicles. Finally, the paper compares the simulation waveform of the shaft voltage of the transmission shaft and motor shaft of the two transmissions, providing a reference for the selection of transmissions in the electric drive system of electric vehicles.