| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an efficient secondary power reception circuit of non-contact power supply facility capable of low voltage constant current control or constant voltage control. <P>SOLUTION: The secondary power reception circuit of a non-contact power supply facility comprises a first coil 32 and a second coil 33 wound around the same core so that an electromotive force is induced by a primary power supply coil 17, a resonance capacitor 38 which forms a resonance circuit 37 together with the first coil 32, a switching element 39 which switches both ends of the resonance capacitor 38 between connection state and open state, a zero-cross detection circuit 40 which detects the zero-cross point of the output voltage from the resonance circuit 37, a rectifier circuit 41 which outputs the current output from the second coil 33 to a battery 22, and a pulse generation circuit 45 having a constant current control function for controlling the current output to the battery 22 to a reference current, by comparing the current output to the battery 22 with the reference current, controlling a pulse width of a drive pulse and outputting a drive pulse to the switching element 39 in synchronism with the zero-cross point. <P>COPYRIGHT: (C)2012,JPO&INPIT |
