Bidirectional F-type Multilevel Inverter with Enhanced Capacitor Balancing for EV Application

Abstract: Electric Vehicles are becoming more popular these days. Bidirectional inverters are used to implement regenerative braking in electric vehicles. A unique multi-level bidirectional converter structure is proposed in this paper for applications in electrical vehicles (EV). It is equipped with a multi-level dc-dc transformer with a dc link condenser. The two-way operation of the DC-DC multi-level converter is a critical requirement in electric vehicles. In comparison to the conventional configuration, the proposed one uses only two additional switches and a condenser. The voltage of the multi-level inverter (MLI) F-type is balanced over under defect conditions. The controller proposed reduces the power system's THD and maintains the quality of power. It has benefits like low switching losses, reduced THD, fewer filter needs and superior output quality compared with three-level MLI F-type. The capacitor voltage balance circuit is used to keep the three capacitors in balance. This results in a tidy, smooth, and efficient capacitor voltage balance between the capacitors. The proposed configuration is examined using a MATLAB/Simulink simulation model and results support the applicability of the converter. Index terms: Electric vehicles, Multilevel Inverters, THD