A Single Stage Bidirectional Wireless Power Transfer for Multiple Vehicle Charging Application

In recent years, the demand for Wireless Power Transfer (WPT) has been increasing. Power transfer from Grid to Vehicle (G2V) and Vehicle to Grid (V2G) for multiple vehicles at the parking station or traffic light signal using a phase-shift concept is simulated and analyzed. A single-stage bidirectional power conversion has got several advantages compared to a conventional two-stage conversion technique. Conversion of a single-phase grid voltage of line frequency to high frequency is done by matrix converter which is connected to compensating capacitor. A high frequency isolated primary coil is connected to a compensating capacitor while the secondary coil is placed in a vehicle with a compensating capacitor and H-Bridge converter followed by the battery. In this paper, a Series-Series (SS) compensating capacitor is used to reduce leakage inductance value. Analysis of circuit topology with three different vehicles having different power rating has been explained in detail. The design of coil parameters and control strategy is also emphasized in this paper. The system is simulated in MATLAB / Simulink and 2.45 kW of power is transferred from G2V and V2G mode of operation.