POWER TRANSMISSION DEVICE FOR NONCONTACT POWER SUPPLY DEVICE

摘要

A power transmission device (110) for a noncontact power supply device, said power transmission device equipped with a resonance circuit that outputs an alternating magnetic flux by means of power from a power supply circuit (121), and switching elements (112A, 112B) that generate the alternating magnetic flux in the resonance circuit. The power transmission device transmits power to a power reception coil in a power reception device by means of the alternating magnetic flux. A power transmission control unit (115) in the power transmission device (110) controls the switching elements (112A, 112B), and is equipped with a transmission mode for repeatedly turning on and off the switching elements (112A, 112B) and thereby supplying alternating power to the resonance circuit. The ON time of one cycle in the operation of the switching elements (112A, 112B) used in the transmission mode is a first fixed value. Thus, it is possible to provide a power transmission device (110) having a simplified configuration.