Optimization of Wireless Charging Power Transmission Efficiency Based on Decoupling Equivalent Circuit Model

In recent years, electric vehicles have successfully entered the consumer market with many advantages such as energy conservation, environmental protection, environmental protection, and convenient maintenance. However, the drawbacks of traditional wired charging methods are becoming increasingly prominent, so the electric vehicle industry has increased its research and development efforts on wireless charging methods. Wireless charging is mainly based on the Faraday electromagnetic induction principle, which refers to the transmission of energy between the charger and the electrical device through a magnetic field instead of directly connecting them with wires. Wireless charging technology may become a key technology to completely break free from the bottleneck of high capacity and high-performance battery research and development. At present, wireless charging has huge development space, but due to the numerous manufacturers, it is not easy to uniformly optimize and improve on-board charging equipment. Therefore, optimizing the lower parts of the vehicle to improve the utilization of power resources is more feasible. In response to the problem of low transmission efficiency in current wireless charging systems, this paper first establishes a decoupled equivalent circuit model to simplify the system, and then establishes an optimization model to optimize the transmission efficiency of the wireless charging system. This article optimizes the wireless charging model of electric vehicles. This article uses adaptive Simpson integration method, Neumann formula, and other methods to theoretically calculate the wireless charging efficiency, and conducts experimental simulation on the model.