The invention relates to an IGBT variable-frequency power source for an energy-saving intermediate-frequency
smelting furnace. The IGBT variable-frequency power source comprises a power source cabinet, a
diode rectifier bridge, filter capacitors, IGBT modules, an
induction coil and a
resonance capacitor. In the power source cabinet, the filter capacitors,
water cooling boxes, the IGBT modules, a connecting
copper bar and a
current transformer are installed in a square box in an integrated mode to form a
structural unit entity. The filter capacitors are arranged in through space above a separation plate of the box, the
water cooling boxes for mounting of the IGBT modules are arranged in through space below the separation plate, and the common connecting
copper bar is fixed to an insulation supporting block at the top of the box. The IGBT modules and the filter capacitors are composed of more than two entities. Through optimization of the process
layout, currents flowing through an IGBT device are even and consistent, and the capacity
utilization rate of the IGBT device and the running power of the IGBT
induction heating power source are increased; the application range of the IGBT
induction heating technology is widened, so that the energy saving and environment friendliness advantages of IGBT
induction heating equipment are further achieved.