| 摘要 |
<p>A transformer system for resistance welding intended for installation on robotic devices comprises an auto transformer (12) having a tap selection switch (14) connected through electrical conductors (20) to an isolation welding transformer (24) located at the end of the robotic arm (22). The auto transformer (12) is uniquely selected for the maximum efficiency thereof and the optimum reduction in the size of the conductors (20) between the transformers (12, 24). The isolation welding transformer (24) is also optimally sized due to the reduction permissable by the previous interposition of the auto transformer (12) in the welding system. Moreover, the isolation welding transformer (24) comprises primary and secondary coils (52, 60) formed from tubular members each of which are 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 (24) in which both primary and secondary windings (52, 60) are cooled by such fluid coolant.</p> |
