Power Distribution of Multi-load WPT System Based on Active L-type Equivalent Network

Instead of achieving the power distribution of the specific load in the constant voltage mode, most of the existing single-input multiple-output Magnetic Coupled Wireless Power Transfer (MC-WPT) systems for multi-load simultaneous charging focus on the resonant frequency tracing or misalignment tolerance enhancement with active impedance matching network. A novel single-input multiple-output multi-load MC-WPT system combining the LCC-S impedance matching topology and the active L-type equivalent network applied the phase-controlled switched capacitors is proposed. By applying the double closed loop PI controller, the system can adjust the power that distributed to each load. The simulation result of the triple-load MC-WPT system proves that the proposed method can achieve the real-time power distribution of three secondary sides with fast load transient response.