| 摘要 |
PROBLEM TO BE SOLVED: To provide a noncontact power transmission device which suppresses currents flowing through a power transmission coil and a receiving coil, downsizes the power transmission/receiving coils, and uses inexpensive electronic components without using special electronic components. SOLUTION: The noncontact power transmission device supplies electric power through electromagnetic induction to the receiving coil L2 of a receiving unit from the power transmission coil L1 of the power transmission device, wherein the receiving unit is arranged in a housing of electronic equipment using a low voltage. In the power transmission device, a voltage step-up circuit 12 is provided to change a DC low-voltage input into a high voltage, and the current flowing through the power transmission coil L1 is suppressed to a predetermined current, then a voltage generated in the receiving coil L2 is changed by a voltage step-down circuit 22 to obtain a predetermined low voltage. COPYRIGHT: (C)2008,JPO&INPIT
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