Features and advantages of electromagnetic induction heating

It is not unfamiliar to mention the home induction cooker! This product uses the principle of magnetic induction heating. This principle is equally applicable to other products. Here, Haituo Electromechanical will introduce you to the principle of electromagnetic induction heating. What are the advantages of magnetic induction heating?




First, the introduction of electromagnetic induction heating

Electromagnetic heating is also called electromagnetic induction heating, that is, electromagnetic heating (external text: Electromagnetic heating abbreviation: EH) technology, the principle of electromagnetic heating is to generate alternating magnetic field through the components of the electronic circuit board, when placed on the surface with the iron container, the surface of the container That is, the alternating magnetic field lines are cut and an alternating current (ie, eddy current) is generated in the metal portion at the bottom of the container, and the eddy current causes the carriers at the bottom of the container to move at a high speed and irregularly, and the carriers collide with the atoms and rub to generate thermal energy. Thereby the effect of heating the article. Because the iron container itself generates heat, the thermal conversion rate is particularly high, and up to 95% is a direct heating method. Induction cooker, electromagnetic cooker electromagnetic heating rice cooker are all using electromagnetic heating technology.

The principle of electromagnetic induction heating is that the alternating current generated by the induction heating power source generates an alternating magnetic field through the inductor (ie, the coil), and the magnetic conductive object is placed therein to cut the alternating magnetic field lines, thereby generating an alternating current (ie, eddy current) inside the object. The eddy current causes the atoms inside the object to move at a high speed and irregularly, and the atoms collide with each other and friction to generate heat energy, thereby heating the article. That is, a heating method in which electric energy is converted into magnetic energy to cause the heated steel body to induce magnetic energy and generate heat. In this way, it fundamentally solves the problem of low efficiency of heating by means of heat conduction such as electric heating sheets and electric heating coils.


Second, electromagnetic induction heating has the following characteristics

1, skin effect. In induction heating, when an alternating current of a certain frequency is passed through the coil, the eddy current density in the workpiece is gradually reduced from the surface to the inner layer as the magnetic field strength decreases due to electromagnetic induction. The skin effect is related to frequency. The higher the frequency, the more obvious the skin effect.

2. Proximity effect. Two adjacent alternating current conductors, the current in the conductor is redistributed due to the interaction of the magnetic fields. When the adjacent conductors are in the same current, the maximum current appears on the outside of the conductor. Conversely, the maximum current appears on the inside of the conductor. . The proximity effect is advantageous for induction heating, but when the gap between the workpiece and the coil is not uniform, uneven current distribution may result, resulting in uneven heating of the workpiece.

3. Ring effect. The alternating current is transmitted through the toroidal coil and the maximum current density appears on the inside of the coil. The ring effect is advantageous for heating cylindrical workpieces.

   4, using MOSFET, IGBT power devices and variable frequency control technology, high efficiency, energy saving, and greater output power;


Third, the advantages of electromagnetic induction heating

1. The heating speed is fast, and the temperature rises faster during the heating process.

2, non-contact heating mode, the operation is more convenient, safe and the surface of the heated object is less oxidized.

3. High heating efficiency, less waste of resources and energy saving.

4. The temperature can be controlled by setting the heating time so that the temperature can be controlled to a point.

5. The floor space is small, the working environment will not produce gas harmful to the human body and pollute the environment, and the noise pollution is small.
 
Principles and advantages of electromagnetic induction heating system

With regard to the introduction of electromagnetic induction heating, what are the advantages of magnetic induction heating? The person in charge of Haituo Electromechanical Co., Ltd. gave a brief introduction to everyone. If you have any doubts about the above expression, you can consult a professional.