Induction heating is a method of heating electrically conductive materials (usually metals) by means of electromagnetic induction. First used since 1920, this method offers a powerful combination of speed, stability, and control for industrial applications. Or sends an inductor (usually made of copper). The material we want to increase the temperature is placed inside this coil. By placing a piece of metal inside the inductor, rotating eddy currents will be induced in the piece. These currents oppose the magnetic field that creates them. The presence of eddy currents in metals causes high electrical losses and as a result produces high heat. The higher the AC frequency, the higher the eddy current and the resulting heat generated. In this way, without the metal part coming into contact with the inductor, concentrated and precise heat will be generated inside the part (both magnetic and non-magnetic parts).
About electromagnetic induction
Another phenomenon that can cause heat to build up in “magnetic” components is hysteresis losses. When magnetic components pass through the inductor, friction occurs inside the magnetic component. Magnetic materials naturally show electrical resistance to rapid changes in the inductive magnetic field. This electrical resistance creates an internal friction that is converted to heat. According to these explanations, the better the magnetic properties of a material and the higher its electrical resistance, the easier it will be to increase its heat by induction heating. The advantages of induction heating can be such as high heating rate, high efficiency, controllability. The process noted its high security and cleanliness due to the fact that the part did not come into contact with the inductor. Induction heating has important applications in various fields. In addition to metallurgical industries such as heat treatment, casting, forging, rolling and welding, this phenomenon is also used in medicine and home applications.