... : Transistor High Frequency Welding Machine is a resonant AC-DC-AC inverter dedicated to induction heating. It’s a high-frequency ... auto-shutdown transistor devices (IGBTs, MOSFET devices) as inverter components. It has frequency automatic tracking features, as well ... protection in lack of phase, low water, over-current (AC/DC), overheating, overvoltage. Time can be preset when heating, insulation ...