Essential Analysis of MRC-WPT System for Electric Vehicle Charging Using Coupled Mode Theory

In wireless Electric Vehicle (EVs) charging, Power Transfer Efficiency (PTE) is considered as one of the performance indicator. However, PTE is seen depending upon a large no of parameters and the relations between those parameters are appealing too. In this paper, frequency characteristics of PTE in relation to design dependant parameters like coil radius, self inductance of the RF coils, mutual coupling between the coils, intrinsic loss ratio, coupling to loss ratio, ohmic resistance and radiation resistance have been reported using Coupled mode theory (CMD). Moreover, different coil misalignment conditions with their PTE characteristics of the WPT system for EVs charging system have been outlined. The theoretical analysis and simulation results articulate important information in designing an efficient WPT system for EVs charging.