Abstract: An induction welding system employs an induction welding apparatus with an induction welding power supply and a chiller in the same enclosure. An induction welding coil is powered by the induction welding power supply. A variable force press can press together work pieces and an actuator can move the induction welding coil lengthwise along a weld joint. The weld controller repeatably conducts induction welds by controlling the induction welding power supply to power the induction welding coil and controlling the induction welding tooling to at least one of press together work pieces to be welded and move the induction welding coil lengthwise along a weld joint between work pieces to be welded.

Abstract: A resistance welding apparatus can employ a modular power supply system with multiple power supply modules and leads for electrically connecting the modular power supply system to a welding resistor. The resistance welding apparatus is selectively configurable in at least three of (i) a first configuration in which the leads connect the first power supply module to the resistor and the second power supply module is disconnected from the resistor; (ii) a second configuration in which the leads connect the second power supply module to the resistor and the first power supply module is disconnected from the resistor; (iii) a third configuration in which the leads connect the first and second power supply modules to the resistor in series; and (iv) a fourth configuration in which the leads connect the first and second power supply modules to the resistor in parallel.