Implementation of High-Power & Low-Frequency Resonant Wireless Power Transfer Charging System for Electric Vehicles

In order to solve the inconvenient problem of electric vehicles (EVs) wired charging mode, the high-power and low-frequency resonant wireless power transfer (WPT) charging system is studied and implemented. The system working principle is analyzed with mutual inductance circuit model. In order to improve the space utilization rate, to enlarge the mutual inductance of two coils, and to decrease the high frequency resistance effect, the planar square magnetizer coils are designed. Moreover, the working process of the circuit is detailed analyzed with frequency tracking module adopted to ensure that the circuit always works in the best condition. Finally, the complete experimental setup is built.