What is the working principle of an induction cooker?
There is a little understanding, if is the change of the magnetic field on the bottom of the pot generate eddy current, that it should not be limited to iron, aluminum copper can, in the electromagnetic induction phenomenon, wire movement in the magnetic field are generally not iron, copper, aluminum and copper pot but can not be heated on electromagnetic oven, that is to say, can not change the magnetic field of copper and aluminum electric eddy current, it can prove whether eddy current thermal effect is not produced by the heat in the pan and whether can be understood as changes in the magnetic field the magnetic domains of molecular iron products produced in the rapid vibration, which makes the the molecules can increase the iron temperature. This may explain why the copper aluminum can not be heated.
Heating principle of electromagnetic ovenElectromagnetic oven is the use of electromagnetic induction principle of food heating. Furnace surface electromagnetic oven is heat-resistant ceramic plate, an alternating current through the coil produces a magnetic field below the ceramic plate, eddy current magnetic field lines passing through the bottom of wok, stainless steel pot, pot, make quick heating and heating food to achieve. The working process is as follows: AC voltage by a rectifier is converted to DC, and the high-frequency power conversion device makes the high frequency alternating current into direct current over the audio, the high frequency alternating current induction heating coil in a flat hollow spiral, resulting in a high frequency alternating magnetic field. The magnetic lines of force penetrate the ceramic bedplate of the hearth and act on the metal pan. Inside the cooking pan, there is a powerful eddy current generated by electromagnetic induction. When the eddy current overcomes the inner resistance of the pot body, the electric energy is converted to the heat energy, and the Joule heat generated is the heat source of cooking.
The electromagnetic oven is used the magnetic field induced eddy current principle, he used the current through the coil produces a magnetic field, when the magnetic field within the bottom of the pot with iron, which will produce many of the small eddy, the pot body on its own high-speed heating, and then heated in the pot of food. The electromagnetic wave produced by the electromagnetic oven is absorbed completely by the shielding layer on the bottom of the coil and the iron pot on the top plate.
