POWER TRANSMITTING DEVICE, POWER RECEIVING DEVICE, AND NON-CONTACT CHARGING METHOD

摘要

Provided are non-contact power transmitting and receiving devices and a non-contact charging method for simultaneously charging the power receiving devices. Variable information is referred that is associated with a combination of devices and varies the resonance frequency or the Q value of a resonance circuit included in the power receiving unit of each of the devices. Variable information is selected that makes the resonance frequency of the resonance circuit of a device having the maximum charging power be equal to a transmitting frequency. Variable information is selected that varies the resonance frequency of the resonance circuit in the power receiving unit of each of the devices except for the device having the maximum charging power so that charging power corresponding to the each of the devices except for the device having the maximum charging power can be supplied from transmitting power. The variable information corresponding to each of the devices having power receiving devices is transmitted. The resonance frequencies of the resonance circuits are varied, and each of the efficiencies associated with identification information is referred. The obtained charging power and efficiency corresponding to each of the devices are used to obtain the transmitting power, and the obtained transmitting power is transmitted at a transmitting frequency.