Top best answers to the question «Is eddy current used in electric heater»
How are eddy currents used for induction heating?
- “Eddy currents, like all electric currents, generate heat as well as electromagnetic forces. The heat can be harnessed for induction heating.” THE EDDY CURRENT LOSS - Eddy current are those which are produced or induced in the masses of metals, whenever these metals are moved in magnetic field, or the magnetic field moves through the metals.
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The term eddy current comes from analogous currents seen in water when dragging an oar breadthwise: localised areas of turbulence known as eddies give rise to persistent vortices. Eddy currents, like all electric currents, generate heat as well as electromagnetic forces. The heat can be harnessed for induction heating.
Electric heater does not involve Eddy currents. It uses Joule's heating effect. Questions from NEET 2019 1.
Eddy currents in conductors of non-zero resistivity generate heat as well as electromagnetic forces. The heat can be used for induction heating. The electromagnetic forces can be used for levitation, creating movement, or to give a strong braking effect. Eddy currents can also have undesirable effects, for instance power loss in transformers.
Dielectric heating – 1MHZ – 50 MHZ. EDDY CURRENT – An electric current in a conducting material that results from induction by a moving or varying magnetic field. “Eddy currents, like all electric currents, generate heat as well as electromagnetic forces. The heat can be harnessed for induction heating.”.
The heat in the material to be heated is produced by eddy currents. Power loss due to eddy currents is eddy current loss and appears in the form of heat. The metal to be heated is placed within a high frequency current carrying coil. By doing so alternating magnetic field is set up, eddy currents are induced in the metal piece and heating is affected. The power loss due to eddy current in the metal piece depends upon the power drawn by the metal piece. The eddy current loss, where B max ...
The heating effect originates from the transformation of electric energy into heat energy and is used in induction heating devices, like some cookers and welders. The resistance felt by the eddy currents in a conductor causes Joule heating and the amount of heat generated is proportional to the current squared.
Induction Heating: It is the process of electrically heating a conducting body by inducing eddy currents in it using high frequency electromagnet. Its main applications are induction cooking, induction furnace used to heat metals to their melting point, welding, brazing etc.
These currents causes loss of energy (I 2 R) in the material where I is the induced eddy current, R the resistance of the material. It results in the heating of the material. The eddy current loss is proportional to the square Of frequency, square of the thickness of the material and inversely proportional to the resistivity of the material.
The shiny metal disc in the electric power meter rotates due to eddy currents. The magnetic field induces the electric currents in the disc. You can also observe the shiny disc at your house.