A full digital electromagnetic induction heater

Abstract

The invention relates to an all-digital electro-magnetic induction heater which comprises a three phase power supply, a power supply switch, a contactor, and further comprises a induction power supply heating controller. The three phase power supply, the power supply switch and the contactor are electrically connected in sequence. The input end of the induction power supply heating controller is connected with the output end of the contactor. The induction power supply heating controller is further respectively connected with a PC upper computer and a programmable logic controller (PLC). The output end of the induction power supply heating controller is connected with an induction heating coil. A smelting furnace and the induction heater of the all-digital electro-magnetic induction heater achieve effects of low power dissipation, low cost and power saving, and have the advantages of being fast in tracking speed, high in accuracy, strong in adjustability and wide in capture band and the like.

Description

technical field [0001] The invention relates to a smelting equipment, in particular to an all-digital electromagnetic induction heater. Background technique [0002] Induction heating uses the principle of electromagnetic induction. The power supply inputs power frequency, intermediate frequency or high frequency alternating current to the coil, and the coil generates an alternating magnetic field. When the workpiece is placed in the alternating magnetic field, the workpiece generates an induced current of the same frequency. The distribution of the workpiece is uneven, strong on the surface, but weak on the inside, and close to zero in the center. Using this skin effect, the surface of the workpiece can be heated rapidly. Induction heating has been widely used in many fields such as surface quenching of industrial metal parts, metal smelting, and bar heating. [0003] Induction heaters usually include an induction heating power supply and a coil, and the induction heating ...

AI Technical Summary

Problems solved by technology

[0004] At present, electric heating tubes are usually used for heating in China. Since the heating of electric heating tubes is relatively slow, the heating equipment is very large and long, with a large footprint and complex structure.

In Japan, electromagnetic induction is used to heat the generator rotor and stator. In order to place the workpiece inside the tubular coil, a special manipulator is designed, and the coil needs to be made very large. The entire equipment structure is very complicated and the cost is high.

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