Bridge rectifiers and large electrolytic filter capacitors to smooth the DC ripple. Inverter Bridge (The "Switching" Stage):
Circuitry to allow external variable current control during the welding process. Critical Safety Precautions
High-power IGBTs (Insulated Gate Bipolar Transistors) or MOSFETs arranged in a full or half-bridge configuration. High-Frequency Transformer:
PWM controller ICs (like the TL494 or UC3846), feedback sensors (shunts or Hall-effect sensors), and drive circuits. TIG-Specific Features