Patent ID: 8339097

Claim:
A non-contact power transfer apparatus comprising: a main body of a power transmission unit having a power transmission coil; a power reception unit having a power reception coil; and a support base formed at a part of the main body for mounting the power reception unit detachably, the non-contact power transfer apparatus performing non-contact power transfer from the power transmission coil to the power reception coil using electromagnetic induction, wherein the power transmission unit includes: a resonant capacitor connected in series to the power transmission coil; a power transmission circuit for supplying power to the power transmission coil via the resonant capacitor; a current detection circuit for detecting a direct current of an input power source of the power transmission circuit; unit detection means for detecting a mounting of the power reception unit on the support base; and a first microcomputer having a control circuit for controlling the power transmission circuit, the current detection circuit and the unit detection means, and the power reception unit includes: a resonant capacitor connected in parallel with the power reception coil; a rectification smoothing circuit for rectifying and smoothing power transferred to the power reception coil; a series regulator for converting an output from the rectification smoothing circuit to a predetermined stabilized voltage; a charge battery unit having a rechargeable battery; a switching element connected in series to the charge battery unit for pulsing an output from the series regulator and pulse-charging the charge battery unit; and a second microcomputer having a control circuit for controlling the series regulator and the switching element, and the second microcomputer and on/off switching of the switching element are used to generate a plurality of pulse patterns.