Induction cua sov siv qhov induced tam sim no (eddy tam sim no poob) generated nyob rau hauv ib tug conductor nyob rau hauv lub siab ntawm - zaus magnetic teb, nrog rau cov nyhuv ntawm magnetic teb nyob rau hauv tus neeg xyuas pib (hysteresis poob), kom sov tus neeg xyuas pib nws tus kheej.
Thaum ib tug hlau conductor muab tso rau hauv ib tug siab - zaus alternating hluav taws xob teb, raws li Faraday txoj cai ntawm electromagnetic induction, ib tug induced electromotive quab yuam yuav tsim nyob rau hauv lub conductor. Vim yog tus neeg xyuas pib qhov kev ua haujlwm tsawg heev, muaj zog induced tam sim no yog generated. Raws li Joule txoj cai, qhov chaw sib nqus sib nqus yuav ua rau cov tam sim no hauv tus neeg xyuas pib ntws mus rau tus neeg xyuas pib qhov chaw, ua rau cov nyhuv ntawm daim tawv nqaij. Qhov ceev ntawm qhov hloov tam sim no yog ncaj qha proportional rau qhov zaus; qhov siab dua qhov zaus, qhov ntau concentrated qhov induced tam sim no ceev yog nyob rau ntawm tus neeg xyuas pib qhov chaw, piv txwv li, qhov hnyav ntawm daim tawv nqaij. Qhov no txo qhov zoo ntawm qhov chaw conductive, ua rau muaj kev tiv thaiv, thiab yog li ua rau tus neeg xyuas pib kom sov sai.
Thaum tam sim no ntws los ntawm tus neeg xyuas pib, ib qho chaw sib nqus yog ib txhij tsim nyob ib puag ncig nws. Lub siab - zaus tam sim no ntws mus rau hauv qhov inductor coil qhov txhab rau hauv lub voj lossis lwm yam duab (feem ntau yog ua los ntawm cov raj tooj liab). Qhov no ua rau muaj zog sib nqus flux nrog instantaneous polarity hloov nyob rau hauv lub kauj. Thaum cov hlau yuav tsum tau rhuab yog muab tso rau hauv lub induction kauj, lub magnetic flux nkag mus rau tag nrho cov rhuab khoom, tsim loj eddy tam sim no nyob rau hauv lub opposite kev taw qhia mus rau lub cua sov tam sim no nyob rau hauv lub rhuab khoom. Vim qhov tsis kam ntawm cov khoom siv hlau rhuab, Joule cua sov yog tsim, ua rau qhov kub ntawm cov khoom hlau nws tus kheej nce siab, yog li ua kom tiav cov cua sov ntawm cov hlau workpiece.