What is the different principle between an intermediate frequency furnace and a high frequency furnace for industrial heat treatment?

The working principle of the high-frequency furnace: the high-frequency current flows to the induction coil or other shaped heating coils wound by the copper tube to generate an alternating electromagnetic field, and the material to be heated is placed in the induction coil, and the electromagnetic induction is in the material The eddy current is generated in the process, which causes the temperature of the material to rise.

Принсипи кори кӯраи басомади миёна: When the induction coil is connected to the AC power supply, an alternating magnetic field is generated in the induction coil, and the magnetic field lines cut the metal charge in the crucible, and the induced electromotive force is generated in the charge. Because the charge itself forms a closed loop, Therefore, induced current is generated in the charge at the same time, and when the induced current passes through the charge, the charge is heated to promote its melting.

The working principles of the two are basically similar, except that the frequency of the power supply is different, and the heating effect is different.