| 主权项 |
1. A non-contact power transmission apparatus, comprising:
a power transmission device which includes a power transmission coil, a power transmission circuit configured to be connected to the power transmission coil and supply power through the power transmission coil, a current detection circuit configured to detect current supplied to the power transmission circuit and a first control circuit configured to control the power transmission circuit; and a power receiving device which includes a power receiving coil, a rectifier circuit configured to be connected to the power receiving coil, a voltage conversion circuit configured to be connected to the rectifier circuit and convert into voltage of driving a load circuit, a switching circuit configured to connect or disconnect the voltage generated by the voltage conversion circuit with the load circuit and a second control circuit configured to control the switching circuit, wherein the second control circuit, after starting to receive power, carries out a control processing to connect the load circuit during a period of time T0, then disconnect the load circuit during a period of time T1 and repeat connection and disconnection; and the first control circuit carries out a control processing to detect repeatedly current values at an interval of time T2 through the current detection circuit and stop power transmission if the current value is above a current threshold value during at least (T0+T1) time. |
