Welding current source

• Main Author: HEBERT AIGNER
• Format: Patent
• Language: Chinese; English
• Published: 25.12.2013
• 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; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; 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; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; WELDING; WORKING BY LASER BEAM

The invention relates to a welding current source (10) comprising a first rectifier circuit (14). The input side of the first rectifier circuit is connected with a single-phase alternating current voltage source and the output side of the first rectifier circuit is connected with a clock-controlled bridge type circuit (26) through a passive power factor correction circuit (16). The welding current source is provided with a resonant converter (38) and the resonant converter is provided with a transformer (40) and at least one oscillating circuit. The oscillating circuit comprises at least one capacitor (44) and at least one inductor (42) connected in series with the capacitor. The primary side of the resonant converter is connected with the bridge type circuit (26) and the secondary side of the resonant converter is connected with a second rectifier circuit (52). The output end of the second rectifier circuit can be connected with a welding electrode (56) and a to-be-welded workpiece (58). In order to improve