CONTROL POWER CIRCUIT

PURPOSE:To ensure lighting of a fault-indicating lamp at the time of fault, by inserting a diode to prevent a main circuit from being impressed with voltage through a control circuit from a control power source terminal when the main circuit is disconnected. CONSTITUTION:The power input from a contr...

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Bibliographische Detailangaben
Hauptverfasser:	NANTO KENJI, AKAHA TERUNOBU
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	PURPOSE:To ensure lighting of a fault-indicating lamp at the time of fault, by inserting a diode to prevent a main circuit from being impressed with voltage through a control circuit from a control power source terminal when the main circuit is disconnected. CONSTITUTION:The power input from a control power source terminal 3 is made to be direct current by a DC production circuit composed of a rectifier 10 and a smoothing capacitor 11. A control power source is prepared in a DC input method and as a DC/DC converter method, etc. When the voltage across terminals of a smoothing capacitor 6 of DC power supply in the main circuit and the voltage across terminals of the abovementioned capacitor 11 are connected to the power input of a control circuit 8 to control the control transistors in the main circuit, they are connected to terminal P2 of the smoothing capacitor 11 from terminal P1 of the smoothing capacitor 6 through a diode 12 in forward direction. Thus, when a protection circuit works in fault, the control circuit 8 perform operation, etc. receiving the power input from the capacitor 11 only.