Electromagnetic induction heating, or electromagnetic heating (foreign text: Electromagnetic heating abbreviation: EH) technology, is the principle of electromagnetic heating is to generate an alternating magnetic field through the components of the electronic circuit board. When an iron-containing container is placed on it, the surface of the container is cut. Changing the lines of magnetic force produces alternating currents (ie eddy currents) in the metal part of the bottom of the container. The eddy currents cause the carriers at the bottom of the container to move at high speeds and irregularly, and the carriers and atoms collide and rub against each other to generate heat energy. So as to play the effect of heating the article. Because the iron container heats itself, the heat conversion rate is extremely high, up to 95% is a direct heating method. The current induction cooker, induction cooker and electromagnetic heating rice cooker all adopt electromagnetic heating technology.

1. Electromagnetic heater

The electromagnetic heater is a device that uses the principle of electromagnetic induction to convert electrical energy into heat. The electromagnetic heating controller rectifies 220V, 50/60 Hz alternating current into direct current, and then converts the direct current into a high frequency of 20-40 kilohertz. High-frequency and high-voltage electricity, or 380V 50/60 Hz three-phase alternating current is converted into direct current and then the direct current is converted into high-frequency, low-voltage and high-current electricity of 10~30 kHz, which is used for heating industrial products.

2. Electromagnetic heating coil

The high-speed changing high-frequency and high-voltage current flowing through the coil will produce a high-speed changing alternating magnetic field. When an iron-containing container is placed on it, the surface of the container will cut the alternating magnetic lines of force and produce an alternating current in the metal part of the bottom of the container (ie Eddy current), the eddy current causes the carriers at the bottom of the container to move randomly at high speed, and the carriers collide and rub against each other to generate heat energy. So as to play the effect of heating the article. That is, by converting electrical energy into magnetic energy, the surface of the heated steel body generates an induction eddy current as a heating method. This method fundamentally solves the problem of low heat efficiency generated by heating through heat conduction, such as electric heating plates and electric heating coils.

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