电动汽车驱动系统直流母线稳定性分析

In order to improve the dc bus quality of the high voltage system of electric vehicles, the load restriction requirements of the driving system are put forward based on the principle of stability analysis. Based on the impedance analysis method, the source/load side impedance model is established. According to the Middlebrook stability criterion, the stability conditions in the full frequency domain are deduced, and the power restriction for the load connected to the DC bus is clearly defined. Moreover, the system stability improvement by the source/load side impedance matching method is studied, which provides a theoretical basis for system parameters design. Finally, the analysis conclusion is verified by experiments combined with a specific electric vehicle.