Off Grid Solar Inverter Inbuilt-in 20A Charger

TD series: tawm daim phiaj hnub ci inverter inbuilt-in 20A charger

Classification ntawm voltmeters

1. DC hom

Feem ntau siv cov ntsuas ntsuas ntawm magnetoelectricity meter thiab electrostatic meter. Lub magnetoelectric voltmeter yog tsim los ntawm ib tug me me-ntau magnetoelectric ammeter thiab ib tug series resistor (tseem hu ua ib tug voltage divider), nrog ib tug yam tsawg kawg nkaus ntawm ntau tshaj kaum millivolts. Txhawm rau nthuav dav qhov ntau ntawm voltmeter, qhov kev tiv thaiv tus nqi ntawm qhov hluav taws xob faib hluav taws xob tuaj yeem nce ntxiv. Piv txwv li, thaum 50 microampere ammeter yog siv los tsim 250 volt voltmeter, tag nrho cov nqi tiv thaiv ntawm qhov hluav taws xob faib hluav taws xob thiab qhov ntsuas ntsuas yuav tsum yog 250 / [50 × 10^(-6)]{{7} } × 10 ^ 6 ohm =5 trillion ohms, uas yog sib npaug rau voltmeter nrog ib qho kev tiv thaiv sab hauv ntawm 20 kohms / volt. Txhawm rau kom tsis txhob muaj kev sib txuas ntau dhau ntawm voltmeter cuam tshuam rau thawj lub xeev ua haujlwm, voltmeter yuav tsum muaj kev tiv thaiv ntau dua. Ib qho hluav taws xob faib hluav taws xob uas muaj ntau yam resistors yog txuas nrog rau hauv cov txheej txheem ntsuas los tsim ntau qhov voltmeter. Qhov tsawg kawg nkaus ntawm cov electrostatic voltmeter yog ob peb kaum ntawm volts, thiab kev nthuav dav ntawm qhov ntau yog ua tiav los ntawm kev hloov cov qauv sab hauv ntawm lub 'meter' thiab qhov kev ncua deb ntawm cov ncej. Tsis tas li ntawd, kev ntsuas kev ntsuas ntawm lub ntsuas hluav taws xob kuj tuaj yeem siv los ntsuas DC voltage hauv kev xav.

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