Switching device, and solar power generation system and vehicle driving system using the same

摘要

A series-parallel switch circuit is constituted by connecting, in parallel, multiple series switch circuits in which a first switch receiving electric current and a second switch outputting the electric current are connected in series. Middle points of the multiple series switch circuits are joined. When the series-parallel switch circuit is turned on, the second switches constituting the series-parallel switch circuit are turned on, and thereafter, the first switches constituting the series-parallel switch circuit are turned on.

主权项

1. A switching apparatus comprising:
an input terminal configured to receive current; an output terminal configured to output the current; a first switch including a first-first terminal, and a first-second terminal which is connected with the input terminal; a second switch including a second-first terminal which is connected with the first-first terminal of the first switch, and a second-second terminal which is connected with the output terminal; a third switch including a third-first terminal which is connected with the first-first terminal of the first switch, and a third-second terminal which is connected with the input terminal; a fourth switch including a fourth-first terminal which is connected with the third-first terminal of the third switch, and a fourth-second terminal which is connected with the output terminal; and a controller configured to turn on and off the first to fourth switches, wherein the first switch has a higher maximum current rating than the second switch, the third switch, and the fourth switch, the controller turns off the first to fourth switches, in a state that the first to fourth switches are in an off state, the controller turns on the second switch and the fourth switch, in a state that the second switch and the fourth switch are in an on state and the first and third switch are in an off state, the controller turns on the first switch, and in a state that the first switch, the second switch and the fourth switch are in an on state and the third switch is in an off state, the controller turns on the third switch.