Apparatus for determination of electrical welding circuit variables

A stud welding apparatus comprising a power supply including power electronics operable for supplying a variable welding voltage together with one of a pilot current and a welding current that is much larger than the pilot current; and a current measuring circuit operable for measuring the electrica...

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Bibliographic Details
Main Authors SCHMITT KLAUS-GISBERT, SCHMIDT WOLFGANG, SCHULZ UDO, SCHEFFLER HEIKO
Format Patent
LanguageEnglish
Published 15.09.2015
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
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Summary:A stud welding apparatus comprising a power supply including power electronics operable for supplying a variable welding voltage together with one of a pilot current and a welding current that is much larger than the pilot current; and a current measuring circuit operable for measuring the electrical current to the weld head; and an input circuit electrically connected between the power electronics and the power supply output, the input circuit including a first inductance, a first resistance, and a switch operable to bridge the first inductance and the first resistance; and a welding circuit electrically connected between the power supply output and the weld stud, the welding circuit having a welding circuit resistance and a welding circuit inductance, and the welding circuit inductance is much smaller than the first inductance of the input circuit; and a voltage measuring device is operable for measuring a voltage across the welding circuit.
Bibliography:Application Number: US201213719832