The heating equipment is a kind of three-phase power frequency alternating current, which is rectified and converted into direct current, and then the direct current is changed into an adjustable current, supplying alternating current flowing through the capacitor and the induction coil, high density occurs in the induction coil The magnetic lines of force and cut the metal material contained in the induction circle, a large eddy current occurs in the metal material. This eddy current also has some properties of high-frequency current, that is, the free electrons of the metal itself move in the metal body with resistance to generate heat. For example, a metal cylinder is placed in the induction coil with alternating intermediate frequency current. The metal cylinder does not directly touch the induction coil. The temperature of the energizing coil itself is already very low, but the outer surface of the cylinder is heated to redness or even melting And this kind of redness and melting speed can be completed only by adjusting the frequency and current strength. If the cylinder is placed in the middle of the coil, the temperature around the cylinder is the same, and the heating and melting of the cylinder does not cause harmful gases and strong light to pollute the environment.
　　Induction heating equipment is widely used in casting, casting, heat treatment, mechanical thermal processing, powder metallurgy and other fields.