induction heating

induction heating
a method of heating a conducting material, as metal in a furnace, by using electromagnetic induction to establish a current in the material.
[1915-20]

* * *

Method of raising the temperature of an electrically conductive material by subjecting it to an alternating electromagnetic field.

Energy in the electric currents induced in the object is dissipated as heat. Induction heating is used in metalworking to heat metals for soldering, tempering, and annealing, and in induction furnaces for melting and processing metals. The principle of the induction-heating process resembles that of the transformer. A water-cooled coil (inductor), acting as the primary winding of a transformer, surrounds the material to be heated (the workpiece), which acts as the secondary winding. Alternating current flowing in the primary coil induces eddy currents in the workpiece, causing it to become heated. The depth to which the eddy currents penetrate, and therefore the distribution of heat within the object, depend on the frequency of the primary alternating current and the magnetic permeability, as well as the resistivity, of the material.

* * *

      method of raising the temperature of an electrically conductive material by subjecting it to an alternating electromagnetic field. The electric currents induced in the object (although it is electrically isolated from the source of the field) bring about dissipation of power in the form of heat. Induction-heating methods are applied most widely in metalworking to heat metals for soldering, tempering, and annealing. The method is also employed in induction furnaces for melting and processing metals.

      The principle of the induction-heating process resembles that of the transformer. A water-cooled coil, or inductor, acting as the primary winding of a transformer, surrounds the material to be heated (the workpiece), which acts as the secondary winding. Alternating current flowing in the primary coil induces eddy currents in the workpiece, causing it to become heated. The depth to which the eddy currents penetrate, and therefore the distribution of heat within the object, depends on the frequency of the primary alternating current and the magnetic permeability, as well as the resistivity, of the material. Induction hardening, widely used to increase the resistance of steel objects to wear, can be effected by brief exposure to a high-frequency field.

      The related method of producing heat in nonconductors is called dielectric heating.

* * *


Universalium. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Induction heating — is the process of heating an electrically conducting object (usually a metal) by electromagnetic induction, where eddy currents are generated within the metal and resistance leads to Joule heating of the metal. An induction heater (for any… …   Wikipedia

  • induction heating — n. the heating of a conducting material by means of electric current induced by an externally applied, varying electromagnetic field …   English World dictionary

  • Induction heating — Induction heating. См. Индукционный нагрев. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

  • induction heating — indukcinis kaitinimas statusas T sritis automatika atitikmenys: angl. induction heating; inductive heating vok. Induktionserwärmung, f rus. индукционный нагрев, m pranc. chauffage par induction, m …   Automatikos terminų žodynas

  • induction heating — indukcinis kaitinimas statusas T sritis fizika atitikmenys: angl. induction heating; inductive heating vok. Induktionsheizung, f; induktive Beheizung, f rus. индукционный нагрев, m pranc. chauffage par induction, m …   Fizikos terminų žodynas

  • induction heating — indukcinis šildymas statusas T sritis fizika atitikmenys: angl. induction heating vok. Induktionserwärmung, f; induktive Erwärmung, f rus. индукционный нагрев, m pranc. échauffement par induction, m …   Fizikos terminų žodynas

  • induction heating — indukcinis kaitinimas statusas T sritis Energetika apibrėžtis Elektros srovei laidžių kūnų kaitinimas, sužadinant juose sūkurines sroves. Kaitinamas kūnas laikomas elektromagnetiniame lauke, kurį sukuria prie žemojo, vidutinio arba aukštojo… …   Aiškinamasis šiluminės ir branduolinės technikos terminų žodynas

  • induction heating — noun Date: 1919 heating of material by means of an electric current that is caused to flow through the material or its container by electromagnetic induction …   New Collegiate Dictionary

  • induction heating — induc′tion heat ing n. mel elm a method of heating a conducting material, as metal in a furnace, by using electromagnetic induction to establish a current in the material • Etymology: 1915–20 …   From formal English to slang

  • induction heating — /ɪndʌkʃən ˈhitɪŋ/ (say indukshuhn heeting) noun a form of heating of electrically conducting materials by the currents induced in them by an alternating magnetic field. Also, eddy current heating …  

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”