Ib qho ntawm cov txheej txheem rau kev ua haujlwm ib txwm ntawm cov khoom siv hluav taws xob yog lub zog ruaj khov. Kev hloov pauv ntawm qhov hluav taws xob hauv cov khoom siv sib txuas tuaj yeem cuam tshuam rau kev ua haujlwm ntawm tsev neeg lossis lwm yam khoom siv. Cov ntsiab lus semiconductor muab sijhawm ntxiv rau cov neeg tsim khoom ntawm ntau yam khoom siv. Hmoov tsis zoo, lawv nkag siab zoo rau kev ua haujlwm thiab yuav tsum tau ua tib zoo kho. Ib qho ntawm cov khoom siv uas tuaj yeem tiv thaiv cov khoom siv hluav taws xob los ntawm kev puas tsuaj thaum lub sij hawm voltage surges los yog ib theem siab ntawm impulse suab nrov nyob rau hauv lub mains yog ib tug surge protector. Nws ua nws txoj haujlwm zoo thiab txuas ntxiv lub neej ntawm cov khoom siv.
Cia peb lub siab xav txog cov khoom siv hluav taws xob thiab txiav txim siab seb cov neeg siv khoom sib txawv li cas cuam tshuam rau nws qhov ntsuas. Thiab yuav ua li cas thiaj li tiv thaiv hluav taws xob tiv thaiv hluav taws xob los ntawm kev puas tsuaj? Qhov zoo tshaj plaws, cov khoom siv hluav taws xob yog sinusoid. Nws yog tas li nyob rau hauv nws cov txiaj ntsig (amplitude) tus nqi thiab zaus. Hmoov tsis zoo, thaum cov neeg siv hluav taws xob muaj zog tau qhib, ntau yam kev cuam tshuam tshwm sim,uas tuaj yeem ua rau cov khoom siv puas tsuaj.
Hauv lub neej niaj hnub, cov khoom siv hluav taws xob "tso nrov" suav nrog lub tshuab nqus tsev, tub yees lossis cua txias. Ntawd yog, qhov twg asynchronous lossis lwm hom motors ua haujlwm, kev cuam tshuam yuav tshwm sim hauv cov khoom siv network. Qhov no yog vim qhov ci ntsa iab ntawm cov txhuam hniav lossis rau qee qhov laj thawj. Txawm tias kev ua haujlwm ntawm rab chais hluav taws xob zoo tib yam tuaj yeem cuam tshuam kev ua haujlwm ntawm, piv txwv li, xov tooj cua receivers. Nyob rau hauv lwm yam lus, thaum ua hauj lwm nrog ib tug inductive load thiab nrog ib tug luv luv so nyob rau hauv lub hluav taws xob Circuit Court (xws li nyob rau hauv cov ntaub ntawv ntawm txhuam nyob rau hauv ib tug hluav taws xob lub cev muaj zog), kev cuam tshuam nkag mus rau hauv lub network khoom. Lawv yog luv luv pulses ntawm nce voltage. Lub network lim, qhov tseeb, tau tsim los daws cov kev tsis sib xws.
Tab sis nws tsis yog lub tshuab hluav taws xob nkaus xwb uas yog qhov teeb meem. Lwm hom khoom siv nrov "nrov" suav nrog cov khoom siv hluav taws xob niaj hnub no lawv tus kheej: TVs, tape recorders, computers, thiab lwm yam. Nws hloov tawm hais tias lub surge protector muaj peev xwm tiv thaiv hluav taws xob los ntawm kev puas tsuaj, uas nws tus kheej tsim unfavorable tej yam kev mob rau nws cov hauj lwm. Qhov tseeb yog tias cov khoom siv niaj hnub no suav nrog cov khoom siv hluav taws xob hloov pauv, kev ua haujlwm uas cuam tshuam nrog ntau zaus ntawm 1000 Hertz lossis ntau dua. Txij li thaum muaj cov transformers ntawm cov tswv yim ntawm cov khoom siv nrog qee qhov inductance, cuam tshuam tshwm sim.
Lawv pom tau yooj yim nrog oscilloscope. Koj tuaj yeem sib sau ua tus tiv thaiv me me nrog koj tus kheej txhais tes kom paub tseebkev ua tau zoo ntawm nws daim ntawv thov. Txhawm rau ua qhov no, nws yog qhov txaus los tsim ib qho inductance uas yuav tiv thaiv qhov kev cuam tshuam ntawm kev cuam tshuam ntau zaus rau hauv cov khoom siv network. Txhawm rau ua qhov no, tsuas yog cua tshuab qee yam ntawm cov xaim xaim, piv txwv li, lub npe PEV, ntawm lub nplhaib ferrite thiab muab nws tso rau hauv cov khoom siv hluav taws xob rau koj lub computer. Raws li qhov inductance (ntau zaus) nce, koj yuav tuaj yeem pom ntawm oscilloscope tias lub suab nrov maj mam ploj mus.
Tam sim no, muaj ntau lub network lim uas tau tsim tshwj xeeb los ua haujlwm nrog ntau hom kev thauj khoom. Ib qho piv txwv zoo hauv qhov no yog Pilot surge protector, uas muaj kev ua tau zoo heev.
