Patent ID: 11594918

Abstract:
The present disclosure relates to a wireless charging transmitter system and its control method. The system includes at least two transmit coils, configured to simultaneously transmit power; at least two transmit circuits, wherein each of the transmit circuits is electrically connected to each of the transmit coils, and is configured to supply a current to the transmit coil; and at least one decoupling circuit, wherein the decoupling circuit is connected to any two coupled transmit coils of the at least two transmit coils. By controlling N switches in a first compensation circuit and/or M switches in a second compensation circuit in the decoupling circuit, compensation capacitors connected in parallel with two terminals of a first inductor and a second inductor are controlled such that the equivalent mutual-inductance of the decoupling circuit may be adjusted to improve decoupling precision and reduce power loss caused by coupling between transmit coils.