System of transformers for a welding apparatus

Details System of transformers for a welding apparatus System of transformers for a welding apparatus

1984-01-20

1986-03-18

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219 8625, 901 42, B23K 1124

Patent

active

045770859

ABSTRACT:
A transformer system for resistance welding intended for installation on robotic devices comprises an auto transformer having a tap selection switch connected through electrical conductors to an isolation welding transformer located at the end of the robotic arm. The auto transformer is uniquely selected for the maximum efficiency thereof and the optimum reduction in the size of the conductors between the transformers. The isolation welding transformer is also optimally sized due to the reduction permissable by the previous interposition of the auto transformer in the welding system. Moreover, the isolation welding transformer comprises primary and secondary coils formed from tubular members each of which is cooled by a fluid coolant. Utilization of refrigerated coolant permits further reduction in size and mass, and increases electrical efficiency because of the unique design of the isolation welding transformer in which both primary and secondary windings are cooled by such fluid coolant.

REFERENCES:
patent: 1861588 (1932-06-01), Swanson et al.
patent: 4348575 (1982-09-01), Hedren et al.

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