| 摘要 |
Wirelessly supplying power is rapidly changed by a switching circuit 11 selectively exciting a magnetic field coupling resonance circuit of L1 and C1 for wireless power supply by use of a resonant frequency of the resonance circuit and its ⅓-divided frequency. A large power is supplied in the case of excitation at the resonant frequency, and in the case of excitation at the ⅓-divided frequency, a small power is supplied. A wireless power supply device with a high power conversion efficiency, with less unwanted radiation, and capable of rapidly changing supplying power can thereby be provided. |
