Analysis of mutual inductance between transmitter and receiver coils in Wireless Power Transfer System of Electric Vehicle

Abstract

n the electric vehicle wireless power trans- fer (WPT) system, the mutual inductance (M) between the transmitting and receiving coils is an important fac- tor influencing overall system efficiency. The M is af- fected by various factors such as the physical structure of the coils diagram, the distance and relative position between the transmitting and receiving coils, and so on. Our work here has two outstanding contributions. First, the detailed mathematical model of the M was developed. Second, the three-dimensional spatial distri- bution diagram of the M was drawn using Python soft- ware, the maximum value of the M and its correspond- ing position coordinates were calculated. Then, the the- oretical analysis of the M distribution was proven cor- rect through experiments. The theoretical analysis and experimental verification of the M distribution provided a theoretical reference for the positioning requirements between the transmitting and receiving coils.in the elec- tric vehicle WPT system.