Anotace:
In the electric vehicle wireless power transfer (WPT) system, the mutual inductance coefficient (M) between the transmitting and receiving coils is an important factor influencing overall system efficiency. We reviewed a large number of research papers in this field but did not find a detailed analysis of the M. There are two contributions in this paper. First, the detailed mathematical model of the M was developed. Second, the three-dimensional spatial distribution diagram of the M was drawn using Python software, and the maximum value and its corresponding position coordinates were calculated. Then, the theoretical analysis of the M distribution in this paper was proven correct through experiments. The theoretical analysis and experimental verification of the M distribution in this paper provided a theoretical reference for the positioning requirements in the electric vehicle WPT system between the transmitting and receiving coils.