Mfundo yogwirira ntchito ya zida zotseketsa pafupipafupi

Pogwiritsa ntchito mfundo ya electromagnetic induction, chotengeracho chimayikidwa mu inductor (coil), ndipo mphamvu yosinthira ma frequency ena imadutsa mu inductor kuti ipange maginito osinthasintha. Mphamvu yamagetsi yamagetsi yamagetsi yosinthira imatulutsa mphamvu yotsekeka muzogwirira ntchito – eddy current.

Kugawa kwaposachedwa komwe kumapangidwira pamtanda wa workpiece kumakhala kosagwirizana kwambiri, ndipo kachulukidwe kameneka pamtunda wa workpiece ndi wapamwamba kwambiri ndipo pang’onopang’ono amachepetsa mkati. Chodabwitsa ichi chimatchedwa khungu effect. Mphamvu yamagetsi yapamtunda yaposachedwa ya workpiece imasandulika kukhala mphamvu ya kutentha, yomwe imawonjezera kutentha kwapamwamba, ndiko kuti, kutentha kwapamwamba kumatheka. Kukwera kwa ma frequency apano, kumapangitsa kusiyana kwakukulu pakati pa kusanjikiza pamwamba ndi mkati mwa workpiece, ndi kuonda kwa kutentha kwa kutentha. Kuzimitsa pamwamba kungapezeke mwa kuzizira mofulumira kutentha kwa kutentha kwa kutentha kumaposa kutentha kwachitsulo.