WELDING APPARATUS
An improved welding power supply includes saturable reactor means in its output to control welding current. A pulse generator is used to control the firing of SCRs which in turn control the average current in the control winding of the reactor and thus the welding current. A unique current sensing c...
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| creator | BARHORST R,US MUTER B,US CHIASSON W,US |
| description | An improved welding power supply includes saturable reactor means in its output to control welding current. A pulse generator is used to control the firing of SCRs which in turn control the average current in the control winding of the reactor and thus the welding current. A unique current sensing circuit provides a feedback voltage to the pulse generator and monitors alternating current, direct current and direct current-reverse polarity welding current without mechanical switching means. The pulse generator is provided with a secondary control circuit which may be used for a limited time to provide higher initial currents to aid in the establishment of the arc. A secondary power supply is also provided which may be connected in parallel with the main power supply to provide a relatively high open circuit voltage to heat the electrode and establish the arc. |
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A pulse generator is used to control the firing of SCRs which in turn control the average current in the control winding of the reactor and thus the welding current. A unique current sensing circuit provides a feedback voltage to the pulse generator and monitors alternating current, direct current and direct current-reverse polarity welding current without mechanical switching means. The pulse generator is provided with a secondary control circuit which may be used for a limited time to provide higher initial currents to aid in the establishment of the arc. A secondary power supply is also provided which may be connected in parallel with the main power supply to provide a relatively high open circuit voltage to heat the electrode and establish the arc.</description><language>eng</language><subject>CLADDING OR PLATING BY SOLDERING OR WELDING ; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ; MACHINE TOOLS ; METAL-WORKING NOT OTHERWISE PROVIDED FOR ; PERFORMING OPERATIONS ; SOLDERING OR UNSOLDERING ; TRANSPORTING ; WELDING ; WORKING BY LASER BEAM</subject><creationdate>1973</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19731120&DB=EPODOC&CC=US&NR=3774007A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19731120&DB=EPODOC&CC=US&NR=3774007A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>BARHORST R,US</creatorcontrib><creatorcontrib>MUTER B,US</creatorcontrib><creatorcontrib>CHIASSON W,US</creatorcontrib><title>WELDING APPARATUS</title><description>An improved welding power supply includes saturable reactor means in its output to control welding current. A pulse generator is used to control the firing of SCRs which in turn control the average current in the control winding of the reactor and thus the welding current. A unique current sensing circuit provides a feedback voltage to the pulse generator and monitors alternating current, direct current and direct current-reverse polarity welding current without mechanical switching means. The pulse generator is provided with a secondary control circuit which may be used for a limited time to provide higher initial currents to aid in the establishment of the arc. 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A pulse generator is used to control the firing of SCRs which in turn control the average current in the control winding of the reactor and thus the welding current. A unique current sensing circuit provides a feedback voltage to the pulse generator and monitors alternating current, direct current and direct current-reverse polarity welding current without mechanical switching means. The pulse generator is provided with a secondary control circuit which may be used for a limited time to provide higher initial currents to aid in the establishment of the arc. A secondary power supply is also provided which may be connected in parallel with the main power supply to provide a relatively high open circuit voltage to heat the electrode and establish the arc.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM |
| title | WELDING APPARATUS |
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