Yuav ua li cas nrog rau cov dej ntws clamp ammeter?
Qhov dej ntws tam sim no clamp meter yog tsim los ntawm impedance transformation, ntau yam transformation, AC-DC transformation, amplification, qhia ntaus ntawv thiab hais txog. Qee qhov tseem muaj kev tiv thaiv dhau tam sim no, acousto-optic tswb Circuit Court thiab ntsuas qhov ntsuas hluav taws xob, thiab lawv cov khoom siv qhia tau muab faib ua analog thiab digital. Raws li Asmeskas tus qauv UL, cov xau tam sim no yog qhov tam sim no uas tuaj yeem ua los ntawm cov khoom siv hauv tsev, suav nrog cov khoom siv hluav taws xob sib txuas. Cov dej xau tam sim no suav nrog ob ntu, ib qho yog qhov conduction tam sim no i1 los ntawm kev tiv thaiv kev tiv thaiv; Lwm qhov yog qhov hloov pauv tam sim no I2 dhau los ntawm cov khoom xa tawm. Lub capacitance reactance tom kawg yog XC=1/2pfc, uas yog inversely proportional rau lub hwj chim zaus. Lub capacitor faib tam sim no nce nrog qhov nce ntawm zaus, yog li cov dej ntws tam sim no nce nrog qhov nce ntawm lub zog zaus. Piv txwv li, yog hais tias lub hwj chim yog muab los ntawm silicon tswj rectifier, nws cov harmonic tivthaiv yuav ua rau kom cov xau tam sim no.
Yog tias qhov kev ntsuas hluav taws xob ntawm lub voj voog lossis lub kaw lus raug ntsuas, qhov tam sim no yuav tsum tsis yog tsuas yog tag nrho cov dej ntws mus rau hauv lub ntiaj teb (los yog cov khoom siv hluav taws xob sab nraud) los ntawm cov khoom siv insulating, tab sis kuj tseem ntws mus rau hauv lub ntiaj teb los ntawm cov khoom siv hluav taws xob hauv Circuit Court. los yog qhov system (distributed capacitors tuaj yeem suav tau tias yog cov khoom siv capacitive). Kev xaim ntev dua yuav tsim kom muaj peev xwm faib tau ntau dua thiab ua rau cov dej xau tam sim no, uas yuav tsum tau them nyiaj tshwj xeeb rau hauv cov tshuab tsis muaj av.
Kev ceev faj rau kev xau ntawm clamp ammeter:
1. Lub hauv paus ntsiab lus ntawm kev ntsuas dej ntws tam sim no yog qhov tseem ceeb tib yam li rwb thaiv tsev tiv thaiv, thiab kev ntsuas rwb thaiv tsev tiv thaiv yog qhov ua tau zoo ntawm cov xau tam sim no, tab sis nws tau qhia nyob rau hauv daim ntawv ntawm kev tiv thaiv. Txawm li cas los xij, AC voltage yog siv rau qhov ntsuas ib txwm muaj ntawm cov xau tam sim no, yog li cov khoom ntawm cov xau tam sim no suav nrog cov khoom siv hluav taws xob.
2. Thaum lub sij hawm tiv thaiv qhov ntsuas hluav taws xob, txhawm rau tiv thaiv cov khoom siv ntsuas thiab ntsuas raws li cov kev qhia tshwj xeeb, nws tseem yuav tsum tau txiav txim siab tus nqi tam sim no loj uas tso cai rau ntws los ntawm cov khoom ntsuas (cov khoom siv rwb thaiv tsev) yam tsis muaj kev puas tsuaj. siab hluav taws xob teb lub zog ntawm cov khoom siv kuaj (cov khoom siv rwb thaiv tsev). Qhov tam sim no feem ntau kuj hu ua leakage tam sim no, tab sis txoj kev no tsuas yog siv nyob rau hauv cov xwm txheej tshwj xeeb saum toj no. Thov xyuam xim rau qhov sib txawv.
3. Cov dej xau tam sim no yog qhov tam sim no ntws los ntawm cov rwb thaiv tsev ntawm cov hluav taws xob hluav taws xob lossis cov khoom siv tsis muaj qhov txhaum thiab siv hluav taws xob. Yog li ntawd, nws yog ib qho ntawm cov cim tseem ceeb los ntsuas qhov rwb thaiv tsev ntawm cov khoom siv hluav taws xob, thiab nws yog qhov ntsuas tseem ceeb ntawm cov khoom lag luam.
4. Cov khoom siv hluav taws xob tam sim no siv los ntsuas qhov ntws tawm tam sim no tsis cuam tshuam rau kev ua haujlwm tsim los ntawm kev ua haujlwm ntawm lub zog hluav taws xob (lossis lwm yam khoom siv hluav taws xob) ntawm cov khoom siv hluav taws xob los ntawm kev rwb thaiv tsev lossis kev faib cov impedance impedance, thiab nws cov input impedance simulates impedance ntawm tib neeg lub cev.
5. Txuas cov khoom ntsuas mus rau qhov ntsuas lub davhlau ya nyob twg, pib lub ntsuas ntsuas, nce qhov ntsuas hluav taws xob mus rau 1.06 zaug (lossis 1.1 npaug) ntawm qhov ntsuas ua haujlwm voltage ntawm cov khoom ntsuas, hloov cov theem hloov pauv, nyeem cov ntawv nyeem theem nrab, thiab xaiv qhov kev nyeem ntawv xau tam sim no nrog tus nqi loj. Thaum qhov hloov pauv hloov K txuas nrog cov kab nruab nrab, qhov ntsuas qhov ntsuas yog qhov xau tam sim no ntawm cov kab nruab nrab thiab lub plhaub. Thaum K txuas nrog rau theem kab, qhov xau tam sim no ntawm theem kab thiab lub plhaub raug kuaj.
6. Nws yuav tsum tau muab sau tseg tias cov xau tam sim no tsis tas yuav zoo ib yam thaum K txuas nrog cov kab nruab nrab lossis K txuas nrog cov kab theem. Qhov no yog vim qhov chaw ntawm rwb thaiv tsev tsis muaj zog ntawm cov khoom siv hauv tsev yog random. Yog li ntawd, qhov kev ntsuam xyuas tam sim no yuav tsum tau ua los ntawm K-switching polarity, thiab tus nqi loj dua yuav tsum raug coj los ua tus nqi hluav taws xob tam sim no ntawm lub tshuab hluav taws xob cua sov yuav tsum tau sim.
