B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
327/70
B23K 11/24 (2006.01)
Patent
CA 2003245
A DC resistance welding apparatus has a pair of welding electrodes for sandwiching work-pieces to be welded therebetween. A circuit is connected to the welding electrodes for supplying a welding current to the welding electrodes. The circuit includes a plurality of parallel- connected rectifying circuits each having a welding transformer and a rectifier. A plurality of inverters are connected respectively to the rectifying circuits for driving the rectifying circuits. An auxiliary control is connected respectively to the inverters for energizing the inverters. A current detector is provided for generating signals proportional to branch welding currents supplied respectively from the rectifying circuits and for feeding the signals back to the auxiliary control. A main control is connected to the auxiliary control for calculating command values indicative of branch welding currents to be reproduced by the respective inverters based on a command value for the welding current and for supplying the calculated command values to the auxiliary control. The auxiliary control includes a feedback control for maintaining the branch welding current constant based on the calculated command values and the main control includes a timer for synchronizing production of the branch welding currents.
Kobayashi Nobuo
Koga Hidenori
Saito Hitoshi
Suzuki Makoto
Takano Fumitomo
Honda Giken Kogyo Kabushiki Kaisha
Ogilvy Renault
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