Hluav taws xob cov capacitance ntawm lub capacitor: qhov xwm thiab lub ntsiab yam ntxwv

Ob nyob rau hauv kev lag luam thiab nyob rau hauv lub neej txhua hnub feem ntau yuav tsum tau cov creation ntawm ib tug loj tus naj npawb ntawm cov zoo thiab tsis zoo hluav taws xob nqi. Nws yog tseeb hais tias nrog lub electrification ntawm lub cev thiab lub electrostatic induction kom nws tsis yooj yim sua. Nws hloov tawm hais tias koj xav tau ib tug tshwj xeeb ntaus ntawv. Xws li ib tug ntaus ntawv ua hauj lwm pab raws li ib tug condenser.

Lub capacitor yog ib tug yooj yim system muaj lub dielectric ntawm ob daim hlau. Nws tseem ceeb heev uas lub thickness ntawm lub insulator yog me me piv rau qhov luaj li cas ntawm cov tib paib, piv txwv li conductors.

Qhov yooj yim daim ntawv ntawm hluav taws xob capacitive ntaus ntawv yog ib tug ca capacitor, uas yog ib tug complex ntawm ob hlau paib sib cais los ntawm ib tug dielectric. Yog hais tias cov phiaj coj lub fais tam sim no, lub ntau nqi ntawm nro sawv ntawm lub electric teb yog yuav luag ob lub sij hawm tshaj lub tib siv ntawm ib qho ntawm cov phiaj no.

Qhov tseem ceeb tshaj qhia ntawm no system yog hluav taws xob capacitance. Hluav taws xob cov capacitance ntawm lub capacitor nyob rau hauv cov nqe lus ntawm electro bases sib npaug tus piv ntawm tus nqi ntawm ib qho ntawm cov phiaj mus rau lub voltage thov ntawm lub conductors ntawm no ntaus ntawv. Nyob rau hauv Feem ntau, qhov hluav taws xob capacitance ntawm lub capacitor yog raws li nram no:

C = q / U

Yog hais tias txoj hauj lwm ntawm cov phiaj nyob rau hauv qhov chaw tseem unchanged rau ib ntev lub sij hawm, qhov hluav taws xob capacitance ntawm lub capacitor tseem qhov (tsis hais txog ntawm lub ntau xwb rau cov phiaj).

Nyob rau hauv lub International System ntawm lub cev ntsuam ntawm hluav taws xob capacitance ntawm lub capacitor yog ntsuas nyob rau hauv farads (F). Raws li qhov no faib tawm, ib tug farad characterizes hluav taws xob capacitance ntawm xws li ib tug ntaus ntawv nyob rau hauv uas lub voltage ntawm insulators yog ib tug volt, thiab tus nqi ntawm them nyiaj uas yog thov mus rau lub phaj, yog sib npaug zos rau ib pendant.

Nyob rau hauv qhov tseeb, ib tug farad - qhov no yog ib tug heev loj tus nqi, li ntawd, feem ntau siv rau lwm xws li cov microfarad, thiab txawm Nanofarad PF.

Pav ca hluav taws xob capacitance ntawm lub capacitor yuav nyob ntawm seb nyob rau cheeb tsam ntawm nws cov electrodes thiab yuav muab tau ntau zog thaum uas txo qhov kev ncua deb nruab nrab ntawm lawv. Yuav kom ho ua rau kom cov hluav taws xob muaj peev xwm ntawm cov pab kiag li lawm yog tswvcuab ntawm lub conductors los yog lwm dielectric.

Nyob rau hauv Feem ntau, lub electrodes rau lub capacitors ua los ntawm ib tug nyias ci thiab lub gasket raws li ib tug tub ntxhais siv daim ntawv, mica los yog tej hub. Nws yog nyob rau hauv raws li cov ntaub ntawv uas pab raws li lub hauv paus rau lub dielectrics, capacitors, thiab tau txais lawv lub npe - daim ntawv, tej hub, huab cua, mica. Haum ntau nyob rau hauv xyoo tsis ntev los tau txais cov electrolytic capacitors uas yog sufficiently compact qhov ntev muaj loj hluav taws xob muaj peev xwm. Vim hais tias ntawm cov qualities, lawv yog lug siv nyob rau hauv khoom vaj khoom tsev, raws li zoo raws li ib tug rectifier tam sim no.

Capacitors yog ib tug ntawm cov tseem ceeb tshaj plaws hluav taws xob khoom siv, tsis muaj uas nws yuav tsuas tsis yooj yim sua kom muaj ib feem ntau ntawm tsev neeg thiab cov hluav taws xob khoom siv.