A Novel Auxiliary Modular Inverter with Battery Integration for Electric Vehicle Applications

this paper presents a new integrated auxiliary bidirectional multilevel converter for applications in electric vehicle (EV). This converter is modular and is designed to be used to power communication circuits, WI-FI and heating, ventilation, and air conditioning (HVAC). It still requires bi-directional operation to flexibly interchange power from and to the auxiliary system battery. The vicinity of the proposed converter to sensitive loads is certified against the European Norm and North American electromagnetic compatibility (EMC) standards. The new configuration allows replacing the bulky electrolytic capacitors with film capacitors that has longer life, higher reliability, lighter weight and smaller size. EMC preliminary results are given in this paper to show compliance with the certification standard limits. Validation of the proposed configuration was conducted using a Simulink model, PSIM simulation model, and a real- time 750Vdc-3 kW laboratory prototype. The proposed converter shows emission interference as well as design immunity to the neighboring power system onboard the electric vehicle.

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