How to solve the problem of magnetic conductor failure in the inductor of medium frequency induction heating equipment

Commonly used magnetic conductors inlaid on the inductors of medium frequency induction heating equipment include ferrite, processable magnetic conductors, silicon steel sheets, etc. The most important measure to improve its service life is to prevent the magnet from exceeding its operating temperature. In addition to correctly selecting the current frequency, the heating of the magnetic conductor is directly related to the cooling method. The cooling of the magnetic conductor mainly relies on heat transfer from the copper tube contact surface, followed by auxiliary copper tubes or external cooling with dripping water. Ferrite will fail when it exceeds its Curie point (generally no more than 180°C, with special cases up to 500°C). Magnetics can be processed at 250 - 300°C, and silicon steel sheets have the highest Curie point. When the silicon steel sheet is embedded in the effective ring, it will generate heat due to the strong magnetic force, which is called iron loss. Its value is directly related to the current frequency, magnetic field strength and thickness of the sheet. The aging of silicon steel sheets (decay of magnetic properties) is caused by the increase in coercive force and hysteresis loss. In addition to aging, silicon steel sheets will also rust. Therefore, it needs to be updated after a certain period of use.