Patent ID: 7884927
Filing Date: 2011-02-08
Classification: H02J

Abstract:
1. A power transmission control device provided in a power transmitting device of a non-contact power transmission system, the non-contact power transmission system transmitting power from the power transmitting device to a power receiving device by electromagnetically coupling a primary coil and a secondary coil to transmit the power to a load of the power receiving device, the power transmission control device comprising: a power-transmitting-side control circuit that controls an operation of the power transmitting device; a driver control circuit that controls operations of a first power transmitting driver and a second power transmitting driver provided in a power transmitting section of the power transmitting device; and a waveform detection circuit that performs a waveform detection process based on a monitor signal from a waveform monitor circuit that monitors at least one of a voltage and a current of the primary coil, the first power transmitting driver driving a first node of the primary coil directly, and the second power transmitting driver driving a second node of the primary coil through a capacitor; a switch circuit being provided in the waveform monitor circuit, the switch circuit being situated in a signal path between the primary coil and a low-level power supply potential; and the power-transmitting-side control circuit causing the switch circuit to be turned ON/OFF using a switch control signal.