컬렉션: Technical Principle of Electromagnetic Induction Heating

Electromagnetic Heating Device
An electromagnetic heating device is a system that utilizes the principle of electromagnetic induction to convert electrical energy into thermal energy. The electromagnetic heating control process involves rectifying 220V-240V, 50/60 Hz alternating current (AC) into direct current (DC), which is then converted into high-frequency, high-voltage electricity at 20–40 kHz. Alternatively, for three-phase AC power (380V-415V, 50/60 Hz), it is first converted into DC and then transformed into high-frequency, low-voltage, high-current electricity at 10–30 kHz for industrial heating applications.  

Electromagnetic Heating Coil:  When the rapidly oscillating high-frequency, high-voltage current flows through the coil, it generates a rapidly alternating magnetic field. When a titanium-containing (or ferromagnetic) container is placed above the coil, the bottom surface of the container cuts through the alternating magnetic field lines, inducing alternating currents (i.e., eddy currents) in the metal portion of the container’s base. These eddy currents cause the charge carriers within the metal to move at high speeds in random directions. The collisions and friction between these charge carriers generate heat, thereby heating the object.  

This method converts electrical energy into magnetic energy, which induces eddy currents on the surface of the heated steel body. Fundamentally, it addresses the low thermal efficiency issues associated with resistive heating methods (e.g., heating plates or coils), which rely on inefficient thermal conduction. By directly generating heat within the target material through electromagnetic induction, this approach significantly enhances energy utilization and heating performance.