Heating Principle of Intermediate Frequency Induction Furnace

Heating Principle of Intermediate Frequency Induction Furnace

The working frequency of the intermediate frequency induction furnace is between 100 and 10000 Hz. It is widely used for heating and smelting non-ferrous and ferrous metals. The editor of Haishan Electromechanical believes that the intermediate frequency induction furnace has high thermal efficiency and heating compared with other heating equipment. It has the advantages of fast speed, short heating time, less alloy element burning loss, wide smelting material, low environmental pollution, and accurate control of heating temperature and smelting composition.

Composition of medium frequency induction furnace

The intermediate frequency induction furnace system is composed of the transformer of the power supply part, the intermediate frequency power cabinet of the intermediate frequency power supply part, the induction coil of the furnace body part, the closed cooling tower of the cooling part, the auxiliary transmission part, the hydraulic part, and the PLC control part.

Heating principle of intermediate frequency induction furnace

The intermediate frequency induction furnace is mainly composed of a frequency conversion device and an induction coil. The frequency conversion device converts the power frequency 50Hz alternating current into an intermediate frequency 100Hz---10000H alternating current rectifies the three-phase power frequency alternating current into direct current and then turns the direct current into adjustable The medium-frequency current is supplied by the medium-frequency alternating current flowing through the capacitor and the induction coil, which generates high-density magnetic lines of force in the induction coil, and cuts the metal material contained in the induction coil, which generates a large eddy current in the metal material.

The frequency conversion device and induction coil of the intermediate frequency induction furnace generate eddy currents in the heated metal material. This eddy current also has some properties of intermediate frequency currents, that is, the free electrons of the metal itself flow in the resistive metal body to generate heat. For example, if a metal cylinder is placed in an induction coil with alternating intermediate frequency current, the metal cylinder is not in direct contact with the induction coil, and the temperature of the energized coil itself is already very low, but the surface of the cylinder is heated to redness or even Melting, and this redness and melting speed can be achieved only by adjusting the frequency and the strength of the current. 

If the cylinder is placed in the center of the coil, then the temperature around the cylinder is the same, and the heating and melting of the cylinder will not produce harmful gas or bright light to pollute the environment. The basic electromagnetic induction of the medium frequency induction furnace principle, the whole heating principle revolves around the various electromagnetic effects of electromagnetic to design medium frequency heating furnace heating.