A Novel Passive Current Sharing Method for a Two-Receiver-Coil IPT System

A two-receiver-coil system could enhance the output power capability and help reduce the conduction losses. However, the unequal coupling would affect the current distribution. In this paper, a novel passive current sharing method is proposed for a two-receiver-coil system. Automatic current sharing is achieved by adding a path between the two receiver coils. The current sharing performance is evaluated through the circuit analytical model. The proposed method can automatically balance the output currents without additional active circuits and control strategy. A l0-W one-transmitter-coil two-receiver-coil system is built to verify the balancing effects.