For advice, does the induction cooker consume most of the reactive power? 70

How can it be reactive? Its active part is converted to heat in the bottom of the pot.

The principle of an induction cooker is eddy current heating induced by a magnetic field. That is, the current is used to generate a magnetic field through the coil, and when the magnetic field lines in the magnetic field pass through the bottom of the iron pot, the magnetic field lines are cut, resulting in countless small eddy currents, which make the iron atoms of the iron pot itself rotate at high speed and produce collision friction heat and directly heat the food in the pot.

When the magnetic force in the magnetic field passes through the bottom of the iron-containing pot, countless small eddy currents will be generated, so that the pot itself will heat up at high speed, and then heat the food in the pot. The electromagnetic waves generated when the induction cooker is working are completely absorbed by the shield at the bottom of the coil and the ferrous pot on the top plate.

Induction cooker heating principle.

Induction cooker is the application of the principle of electromagnetic induction to heat food. The surface of the induction cooker is a heat-resistant ceramic plate, and the alternating current generates a magnetic field through the coil under the ceramic plate, and when the magnetic field lines in the magnetic field pass through the bottom of the iron pot and stainless steel pot, eddy currents are generated, so that the bottom of the pot is quickly heated to achieve the purpose of heating food. The process of its work is as follows:

The alternating current is converted into direct current through the rectifier, and the direct current is changed into high-frequency alternating current that exceeds the audio through the high-frequency power conversion device, and the high-frequency alternating current is added to the flat hollow spiral induction plus ** circle, which generates a high-frequency alternating magnetic field. Its magnetic field lines penetrate the ceramic countertop of the cooktop and act on the metal pot. In the cooking pot, there is a strong vortex generated by electromagnetic induction.

When the vortex overcomes the internal resistance of the pot to flow, it completes the conversion of electrical energy to heat energy, and the Joule heat generated is the heat source for cooking.

Because there is a coil in the induction cooker, so the induction cooker must have reactive power, reactive power is not useless, it is a necessary condition for the establishment of a magnetic field, the state for the civil power grid, generally do not count reactive power charges.

In the process of energy conversion, the electrical energy is replaced by the heat energy generated by the eddy current of the magnetic field, so the active power consumed by the induction cooker is consumed, and the greater the power of the induction cooker, the greater the active power consumed.

Both induction cookers and generators have both active and reactive power.

Does this have anything to do with everyday conversations? Give an example.

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