DC-DC CONVERTER

PURPOSE: To prevent a malfunction caused by noise voltage, etc. while a switching device is in an off-state, in a synchronous commutation method DC-DC converter which uses the field control-type switching device such as a FET. CONSTITUTION: By turning a switching device 5 serially connected to a pri...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	KIKUCHI TADAO
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 CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION SYSTEMS FOR STORING ELECTRIC ENERGY
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Beschreibung
Zusammenfassung:	PURPOSE: To prevent a malfunction caused by noise voltage, etc. while a switching device is in an off-state, in a synchronous commutation method DC-DC converter which uses the field control-type switching device such as a FET. CONSTITUTION: By turning a switching device 5 serially connected to a primary winding of a transformer 7 on and off, AC voltage is taken out on a secondary side of the transformer 7. The taken-out AC voltage is rectified by a FET 11 for rectifying which is serially connected to a secondary winding of the transformer. A choke coil 15, a capacitor 17, and a FET 13 for free-wheeling constitute a synchronous commutation-method DC-DC converter. Although the FET 11 for rectifying and the FET 13 for free-wheeling turn off in different zones, a section between a gate and a source of each FET is shorted by means of signals from a controlling circuit 9 through photocouplers 35 and 37 in an off-state zone of each FET and thereby a malfunction caused by noise voltage, etc., is prevented.