Lub ntsuas hluav taws xob (LCR meter) yog ib hom kev siv hluav taws xob xeem siv los ntsuas qhov inductance (L), capacitance (C), thiab kev tsis kam (R) ntawm ib qho hluav taws xob tiv thaiv. tau ntsuas ntawm lawv tus kheej thiab hloov dua siab tshiab rau zaub rau cov coj ua raug lossis cov txiaj ntsig inductance. Kev nyeem ntawv yuav tsum muaj peev xwm tsim nyog yog tias lub capacitor lossis cov khoom siv sib zog hauv qhov kev ntsuas tsis muaj qhov cuam tshuam tiv thaiv qhov tsis zoo ntawm qhov tsis haum. Ntau tshaj kev tsim ua qauv ntsuas qhov tseeb inductance lossis capacitance, ntxiv rau qhov sib npaug series tsis kam ntawm cov capacitors thiab Q cov ntsiab lus ntawm cov khoom siv sab hauv.
Feem ntau cov cuab yeej hauv qhov ntsuas (DUT) raug rau AC voltage qhov chaw. Cov ntsuas tau ntsuas qhov ntsuas hluav taws xob hla thiab tam sim no dhau ntawm DUT. Los ntawm cov piv ntawm cov ntsuas no tuaj yeem txiav txim siab qhov ntau ntawm qhov tsis haum. Qeb kaum sab nruab nrab ntawm qhov ntsuas hluav taws xob thiab tam sim no tseem ntsuas tau ntau dua kev ntsuas; nyob rau hauv kev sib xyaw nrog qhov impedance, qhov sib npaug capacitance los yog inductance, thiab kev tsis kam, ntawm DUT tuaj yeem suav thiab tshwm. Cov ntsuas yuav tsum muaj kev sib txuas lossis cov qauv txuas rau ob yam no. Tus zoo tagnrho capacitor tsis muaj tus yam ntxwv uas tsis yog capacitance, tab sis tsis muaj lub zog zoo tagnrho capacitors. Txhua tus capacitors yeej muaj qhov pib ua me ntsis, tiv taus me ntsis, thiab qee qhov tsis xws ua rau kev ua haujlwm tsis tau zoo. Cov no tuaj yeem pom raws li inductance lossis tsis kam nyob rau hauv series nrog lub thev naus laus zis lossis txuas nrog nws. Thiab yog li zoo li nrog inductors. Txawm tias resistors tuaj yeem muaj inductance (tshwj xeeb tshaj yog tias lawv yog cov hlau hlau yam) thiab muaj peev xwm tau muaj kev cuam tshuam tau ntawm txoj kev lawv tau tsim. Cov kev xav muaj txiaj ntsig zoo tshaj plaws, thiab ib qho ib txwm tau saws, yog tias LR ntsuas ntsuas muaj cov khoom hauv series (raws li qhov tsim nyog hauv qhov teeb meem inductor' s kauj) thiab tias CR ntsuas ntsuas muaj cov khoom hauv parallel ( raws li qhov tsim nyog ntawm kis tau los ntawm lub capacitor' s' daim hlau'). Tawv tso yog qhov teeb meem tshwj xeeb hauv capacitors, vim tias cov tawv xau txhawm rau hla ntawm daim phiaj capacitor, uas yog hauv feem ntau.
Ib lub ntsuas LCR tseem siv tau los ntsuas qhov hloov inductance sib txawv rau txoj haujlwm rotor hauv cov tshuab ua hlau nplaum tas li. (Txawm li cas los xij, kev saib xyuas yuav tsum tau ua, raws li qee qhov LCR meters yuav raug puas tsuaj los ntawm lub tshuab hluav taws xob EMF tsim los ntawm tig lub rotor ntawm lub tshuab hluav taws xob uas nyob mus ib txhis; tshwj xeeb cov uas tau npaj rau kev ntsuas hluav taws xob tiv thaiv.)
Handheld LCR metres feem ntau muaj cov kev xaiv ntsuas tau ntau zaus ntawm 100 Hz, 120 Hz, 1 kHz, 10 kHz, thiab 100 kHz rau cov lus kawg. Cov kev daws teeb meem thiab ntsuas qhov ntsuas qhov muaj peev xwm feem ntau yuav hloov nrog qhov thov ntsuas ntau dua vim tias qhov hluav taws xob tsis sib txuas lossis ntau dua rau cov ntsuas uas tau muab rau (piv txwv li, tus inductor lossis capacitor) raws li qhov ntsuas zaus hloov pauv.
Benchtop LCR metres qee zaum muaj qhov ntsuas xaiv qhov ntau tshaj ntawm 100 kHz. Lawv feem ntau suav nrog kev xaiv rau superimpose DC DC lossis tam sim no ntawm AC ntsuas teeb liab. Cov ntsuas hluav taws xob qis kawg yuav ua tau kom muaj peev xwm tso rau sab nrauv cov DC qhov hluav taws xob lossis cov dej ntws thaum cov cuab yeej siab dua tuaj yeem muab lawv nyob rau sab hauv. Ntxiv rau qhov kev sib tw benchtop meters feem ntau tso cai rau kev siv cov khoom siv tshwj xeeb (piv txwv li, Kelvin xov hlau, uas yog hais, 4-xaim txuas) txhawm rau ntsuas SMD Cheebtsam, cua-core coils lossis transformers.
Cim npe nrov: precision LCR meter, tuam ntxhab, yuav, tus nqi qis, hauv Tshuag
