POWER SUPPLY DEVICE AND POWER SUPPLY DEVICE FOR WELDING

PROBLEM TO BE SOLVED: To provide a power supply device capable of providing overheat protection and output stability of a switching element in a properly balanced manner.SOLUTION: A power supply device, when detecting that output power of a supply device exceeds a rating output value P1, changes a t...

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Bibliographische Detailangaben
Hauptverfasser:	NISHISAKA FUTOSHI, MANABE AKIHIKO, NARUSE HITOSHI
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 CLADDING OR PLATING BY SOLDERING OR WELDING CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ELECTRICITY GENERATION MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a power supply device capable of providing overheat protection and output stability of a switching element in a properly balanced manner.SOLUTION: A power supply device, when detecting that output power of a supply device exceeds a rating output value P1, changes a temperature threshold used in abnormal temperature determination of a switching element from a temperature threshold b used at a rating output value of P1 or less to a temperature threshold a lower than the temperature threshold b. That is, even when the output power of the supply device exceeds the rating output value P1, the device can performs appropriate abnormal temperature determination of the element according to real temperature resistance of the switching element.