| 摘要 |
PURPOSE:To manufacture a device of high reliability at low cost by actuating the second DC power supply using a diode full-wave rectifier, when the first DC power supply formed of a storage battery charged with a charger having an ordinarily control unit stops, so as to inhibit a current from flowing between the first/second power supplies. CONSTITUTION:Single or three-phase AC power is transformed by a transformer TR1 to obtain the first DC power supply by energizing a charger 1 by an oridinarily control unit 2, and a storage battery B is charged by the first DC power supply. Simultaneously through a diode D1, DC power is supplied to a DC output load. When the first DC power supply stops due to a trouble or inspection and the like, single or three-phase AC power is transformed by a transformer TR2, and the second DC power supply obtained by a diode full-wave rectifier 3 is supplied to the DC output load through a diode D2. A current is inhibited from flowing between the first/second power supplies by the diodes D1, D2. In this way, the power supply of high reliability at low cost is manufactured. |
