| 摘要 |
PROBLEM TO BE SOLVED: To provide a wireless power transmission device capable of performing AC output of a commercial frequency even under various load conditions.SOLUTION: The wireless power transmission device performs power transmission using a power transmission coil 14 and a power reception coil 24 and includes: a first rectifier circuit 11 for fully rectifying an input-side AC voltage; an inverter 12 for converting a rectified voltage which is outputted from the first rectifier circuit and cyclically pulsated, into an AC voltage without smoothing it; a second rectifier circuit 21 for fully rectifying an AC voltage transmitted via the power transmission coil and the power reception coil; a filter circuit 25 connected to output of the second rectifier circuit; a DC/AC conversion circuit 22 which inputs an output voltage of the filter circuit and outputs an AC voltage; a detection circuit 7 for detecting a rectified current between output of the second rectifier circuit and input of the filter circuit; and a control circuit 26 for controlling the DC/AC conversion circuit. On the basis of a detection value of the rectified current detected by the detection circuit, the control circuit performs control for positively and negatively switching the output voltage of the DC/AC conversion circuit. |
