Wireless power transmission device, method for controlling heat generated by wireless power transmission device, and production method for wireless power transmission device

A method of forming an electromagnetic space, comprising the step of,

• a thermal control method for a wireless power transmission apparatus which supplies power, by means of resonance phenomenon, from a power-supplying module having at least a power-supplying coil and a power-supplying resonator to a power-receiving module having at least power-receiving resonator and a power-receiving coil, and connected to a power-supplied electronic device having a secondary battery rechargeable with a use of a constant current/constant voltage charging system, comprising:
• setting variable parameters configuring the power-supplying module and the power-receiving module so that a value of transmission characteristic relative to a drive frequency of the power supplied to the power-supplying module has a double-hump characteristic has a peak in a lower drive frequency band than a resonance frequency in the power-supplying module and the power-receiving module, and a peak in a higher drive frequency band than the resonance frequency, thereby
• enabling control of heat generation in the wireless power transmission apparatus, by adjusting the drive frequency to set a variation tendency in input impedance values of the wireless power transmission apparatus at a time of constant voltage charging to adjust variation tendency of the input current to the wireless power transmission apparatus.