NO-LOAD AUTOMATIC STOP POWER-SAVING DEVICE FOR ELECTRIC WELDING MACHINE

• Main Author: YAO JINGRONG
• Format: Patent
• Language: English
• Published: 03.08.1988
• Edition: 4
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; 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

After an electric welding machine being added with a no-load automatic stop device, a power supply can be switched on, when a welding rod is contacted with a work piece, the induction current output from a current mutual inductor can be injected into the base electrode of a transistor, and the transistor can be conducted for completing the triggering function. Then an instruction relay can operate, the alternating current contactor of an actuating mechanism can attract, and the welder can weld after connecting the power supply. Meanwhile, a delay capacitor can charge so as to discharge to the instruction relay in short stopping welding, and the alternating current contactor can be kept attracting for investigation and changing welding rods. The delay can be completed when the discharging is off, the alternating current contactor can release, and the welder is switched off for lying in an electricity saving status. Therefore, the no-load reactive power loss of the welder can be saved.