ENGINE DRIVING WELDER

• Main Authors: MARUOKA TADASHI, TAKASHITA MUNEMITSU
• Format: Patent
• Language: English
• Published: 06.10.2000
• Edition: 7
• Subjects: 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 OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROL OR REGULATION THEREOF; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; 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

PROBLEM TO BE SOLVED: To provide plural generation wires in series, to improve AC voltage, to convert output into DC welding power in one rectifying circuit at the time of rotating an engine at low speed and when no-load voltage drops, to convert AC output obtained by making the plural generation wires in parallel into DC welding power in one rectifying circuit, to supply DC output to one welding bar, and to reduce the rectifying circuit at the time of high speed rotation. SOLUTION: Plural generation wires Ua and Ub are wound to a generator driven by an engine. At the time of rotating the engine at high speed, the respective generation wires Ua and Ub are connected in parallel by the change-over of a switch circuit 4. At the time of rotating the engine at low speed, the generation wires Ua and Ub are connected in series so that AC voltage dropped by the change-over of the switch circuit 4 is raised. A rectifying circuit 5 converts output to DC welding power and DC output is supplied to a welding bar 6.