Novel Wireless EV Charging System Utilizing Boost Integrated Multilevel Inverter

The conventional full bridge converter employed in a wireless inductive power transfer system has issues such as receiver-side regulation at the cost of additional components, expensive switches and gate control. To overcome these issues, a novel wireless EV charging system utilizing boost integrated multilevel inverter is proposed. Multiple half-bridge submodules are connected in series to form BIMI. Each half-bridge module is connected to a DC source through a DC inductor. This BIMI generates multilevel boosted output voltage, facilitating efficient power flow over a wide load range without requiring regulation at the receiver side converter. Various operating modes of the proposed BIMI-based Wireless charging system under steady-state conditions have been presented. A mathematical model of the proposed BIMI-based WPT system is derived. The resonating frequency is 85 kHz. The simulation study is carried out in MATLAB/Simulink to validate the system theoretically. A 3700W hardware prototype is fabricated for practical validation of the proposed BIMI-based WPT system. In addition, the results of THD and loss breakdown are presented.