Modelling and Analysis of Power Performance of Electric Drive System of Micro Electric Car

For the multi energy coexisting system such as micro electric vehicle, it is particularly important to establish an accurate electric drive system model and flexibly change the system composition and component parameters for the design of micro electric vehicle. Based on the study of the structural characteristics and the overall control scheme of the micro electric vehicle, the drive motor model and the motor vector control model were analysed based on the bond graph theory, and then the dynamic mechanics analysis of the model was carried out with the help of MATLAB, according to the obtained bond graph model. The experimental method was used to verify the model analysis results, the recorded data are processed by MATLAB, and the relationship curves of voltage, current, and power and impedance under different motion conditions were drawn. The results show that: through the dynamic performance simulation of the dynamic model, the factors affecting the driving range of micro electric vehicle are analysed, and the effective measures to increase the driving range are put forward; When the micro electric vehicle runs in a straight line, the parameters basically do not change; When the left-right steering movement, the power consumed by the right front wheel when turning right is higher than that when turning left, but the impedance is lower than that when turning left; The experimental results verify the feasibility and effectiveness of bond graph theory in system modelling and simulation.