Working principle of induction melting furnace coil

The working principle of the induction melting furnace coil is simply that when the induction coil is working, the alternating current passes through the induction coil to form an alternating magnetic field. According to Farad's law of electromagnetic induction, the alternating magnetic force lines cut the metal inside the coil to form an induced current. Because of the resistance heating of the metal itself, heat is generated during the flow of current inside the metal, thereby heating or melting the metal. This is also the basic principle of induction heating and induction melting.

In detail, the induction furnace is a kind of induction heating equipment with high heating rate, fast speed, low consumption, energy saving and environmental protection for metal materials. The high-frequency high-frequency current flows to the heating coil (usually made of red copper tube) that is wound into a ring or other shape.

As a result, a strong magnetic flux that changes momentarily in the coil, when a heated object such as metal is placed in the coil, the magnetic flux will penetrate the entire heated object, and the inside of the heated object will be opposite to the heating current in the direction opposite to the heating current. Corresponding to a large eddy current.

Due to the resistance in the heated object, a lot of Joule heat will be generated, which will cause the temperature of the object to rise rapidly to achieve the purpose of heating all metal materials.