| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a power supply circuit which can efficiently discharge a capacitor discharged by voltage generated by a power generator, a power supply device equipped with the power supply circuit, and a control method for the power supply circuit.SOLUTION: When discharging a capacitor 3 which is connected to an alternator 1 in parallel and charged, a first switch 21, a third switch 23, and a fourth switch 24 are turned off and a second switch 22 is turned on, so that the connection of the alternator 1 and the capacitor 3 is switched from parallel to serial. In charging the capacitor 3, the second switch 22 is turned off and the first switch 21 is turned on, so that connection of the alternator 1 and the capacitor 3 is switched from serial to parallel. In this case, of the third switch 23 and the fourth switch 24, only the fourth switch 24 is first turned on, a constant current circuit 5 is serially connected to the capacitor 3, and only the third switch 23 is turned on later.</p> |
