Microprocessor Based Electronic System for Control of Induction Heating in Machine Industry

The paper discusses the electronic control of induction heater power converter for ferromagnetic materials melting. The system is built on the base of a bridge schematic of power amplifiers, which includes three separate power amplifiers, as each of them is power supplied by three-phase supply line. The operating frequency of the equipment ranges from 25 kHz to 400 kHz, depending on the resonant frequency of the output resonant circuit. The maximum power of the equipment is 10kW.