Lub hauv paus ntsiab lus tsim qauv ntawm lub inductor cia siab rau electromagnetic induction thiab sib nqus zog cia; nws hloov pauv cov kev hloov pauv hauv hluav taws xob tam sim no rau hauv lub zog sib nqus khaws cia- uas tau tso tawm tom qab- yog li tswj hwm lub voj voog tam sim no thiab qhov hluav taws xob. Cov qauv tsim tseem ceeb suav nrog inductance, tam sim no - nqa lub peev xwm, cov yam ntxwv tseem ceeb, thiab cov lus teb zaus los xyuas kom ruaj khov thiab txhim khu kev qha hauv cov ntawv thov tshwj xeeb.
Inductance yog txiav txim los ntawm tus naj npawb ntawm winding lem, hlau ntsuas, thiab cov hlau nplaum permeability ntawm cov tub ntxhais. Ua kom tus lej hloov lossis cov tub ntxhais permeability nce qhov inductance, thaum lub ntsuas hluav taws xob cuam tshuam rau tam sim no - nqa lub peev xwm thiab winding DC tsis kam. Cov neeg tsim qauv yuav tsum sib npaug inductance tiv thaiv lub zog poob, qhov loj ntawm lub cev, thiab tus nqi kom ua tiav cov kev daws teeb meem uas ua tau raws li qhov yuav tsum tau ua hauv hluav taws xob thaum tseem tshuav nyiaj txiag. Kev xaiv thiab cov duab ntawm cov tub ntxhais hlau nplaum yog qhov tseem ceeb. Cov ntaub ntawv sib txawv-xws li hlau hmoov, ferrite, los yog amorphous alloys- nthuav tawm txawv permeability thiab cov yam ntxwv tsis zoo, ua rau lawv tsim nyog rau qee qhov ntau zaus thiab qib zog. Core geometry (piv txwv li, toroidal, E-core, lossis pas nrig-type) cuam tshuam cov sib nqus flux faib thiab cov yam ntxwv saturation; Kev tsim qauv zoo tuaj yeem txo qis eddy tam sim no thiab hysteresis poob, yog li txhim kho kev ua haujlwm. Tsis tas li ntawd, kev rwb thaiv tsev thiab thermal tswj yog qhov tseem ceeb ntawm kev tsim, kom ntseeg tau tias lub inductor tsis poob vim overheating lossis rwb thaiv tsev tawg thaum lub sijhawm ua haujlwm.