This paper proposes a single-stage three-phase wireless charging system for electric vehicles, which utilizes 650V GaN Monolithic Bidirectional Switches (M-BDSs). The converter directly produces high-frequency voltages from the grid to drive resonant networks and the coils, eliminating the need for a front-end AC/DC converter stage. The output power exhibits no low-frequency ripple, enabling power decoupling and thereby reducing the overall system volume and weight. A mathematical model predicts transient voltages, currents, and power, demonstrating advantages in power factor (PF), total harmonic distortion (THD), and output ripple. Circuit simulations verify the operation of the design at 6.6 kW, showing that the three-phase mode achieves a THD of 0.15%, a power factor of 0.965, and an output voltage ripple of 0.012%. Finally, the development process of the overall hardware system used in the experiments is also presented.
