The 12-pulse IF power supply is mostly used as the rectification part of the high-power induction melting furnace . The 12-pulse full-controlled rectifier circuit consisting of 12 thyristors is input to the power frequency grid voltage (380V-900V) to control the conduction of the thyristor. Provides a rectifier with no 5th and 7th harmonic components for the load. It realizes the output of 0~1150V continuously adjustable DC voltage. The inverter uses ordinary parallel resonance or series resonant load. The schematic diagram is uploaded for your reference analysis.