Pes Tsawg Lub Zog Ua Tus Nqi Rt (ω)
RT yog hais txog cov nqi tiv taus ntawm qhov ntsuas kub uas ua rau muaj kev ntsuas kub uas ua rau muaj nuj nqis cuam tshuam rau tag nrho cov kev ntsuas kom yuam kev.
Qhov kev txheeb ze ntawm cov nqi tiv thaiv thiab qhov kub hloov ntawm cov hluav taws xob hluav taws xob yog raws li hauv qab no:
RT = rn expb (1 / t - 1 / tn)
RT: NTC thermistor tsis kam ntawm qhov kub t (k).
RN: NTC thermistor tsis kam ntawm ntaus kub TN (k).
T: Teev qhov kub (k).
B: Cov khoom siv tsis tu ncua ntawm NTC thermistor, tseem hu ua thermal conensitivity index.
Exp: exponent raws tus naj npawb ntuj e (e = 2.71828 ...).
Kev sib raug zoo yog qhov tseeb thiab muaj qib kev raug tsuas yog nyob rau hauv ib qho kev ntsuas kub kub tn lossis rated tsis li ntawm RN, txij li cov khoom siv tas li B yog nws tus kheej lub luag haujlwm ntawm T.
Rated Xoom Hluav Taws Xob Ua R25 (ω)
Raws li lub teb chaws tus qauv, tus ntsuas xoom tiv thaiv tus nqi yog tus nqi tiv thaiv R25 ntsuas los ntawm NTC thermistor ntawm qhov siv kub ntawm 25 ℃. Qhov kev tiv thaiv no yog cov nominal tsis kam nqi ntawm NTC thermistor. Feem ntau hais ntc thermistor Ntau npaum li cas cov nqi tiv, kuj yog hais txog tus nqi.
Cov ntaub ntawv tas li (thermal rhiab kawg index) b tus nqi (k)
B qhov tseem ceeb yog txhais raws li:
RT1: xoom fais fab tsis kam ntawm T1 (k).
RT2: XOOM Lub Zog Hluav Taws Xob tiv thaiv tus nqi ntawm T2 (K).
T1, T2: Ob qhov kub thiab txias (k).
Rau cov tc cov cua nab kuab, b muaj nuj nqis los ntawm 2000k mus rau 6000k.
Pes zog fais fab tiv taus kub cov coefficient (α)
Qhov sib piv ntawm cov kev hloov pauv ntawm lub xoom fais fab tsis kam ntawm NTC thermistor ntawm qhov ntsuas kub uas ua rau qhov hloov pauv.
: xoom zog tiv thaiv hluav taws kub kub cov coefficient ntawm kub t (k).
RT: xoom zog tiv thaiv tus nqi ntawm qhov kub t (k).
T: kub (t).
B: Cov khoom siv tas li.
Dissipation coefficient (Δ)
Ntawm ib qho kev tawm tsam tau hais txog NTAU qhov kub thiab txias, qhov tsis txaus ntseeg ntawm NTC thermistor yog qhov sib piv ntawm lub hwj chim dissipated nyob rau hauv lub zog despipated nyob rau hauv lub zog despipated nyob rau hauv lub zog despipated nyob rau hauv lub zog despipated nyob rau hauv lub zog despipated nyob rau hauv lub zog despipated nyob rau hauv lub zog despipated nyob rau hauv lub zog despipated nyob rau hauv lub zog despipated nyob rau hauv lub resistor rau qhov ntsuas kub hloov mus rau qhov ntsuas kub hloov chaw ntawm lub resistor.
: FREIPMATIONS COefficient ntawm NTC thermistor, (MW / K).
△ P: Fais fab tau noj los ntawm NTC thermistor (MW).
△ T: NTC tus cua sov siv zog △ p, qhov ntsuas kub hloov ntawm lub cev resistor (k).
Lub sijhawm thermal tas li ntawm cov hluav taws xob Cheebtsam (τ)
Nyob rau hauv lub zog xoom zog, thaum qhov kub hloov dheev, cua sov hloov lub sijhawm yuav tsum tau rau 63.2% ntawm thawj ob qhov sib txawv. Lub sijhawm thermal tas li yog proportional rau lub peev xwm ua kom sov ntawm lub NTC thermistor thiab inversely proportional rau nws cov kev ploj ntais.
τ: Lub sijhawm thermal tas li (s).
C: Thaum tshav kub muaj peev xwm ntawm NTC thermistor.
δ: Caw coefficient ntawm NTC thermistor.
Rated Hwj Chim Pn
Kev pub siv hluav taws xob uas muaj kev cia siab ntawm tus cua kub ua haujlwm txuas ntxiv rau lub sijhawm ntev nyob rau hauv cov kev mob tshwj xeeb. Nyob rau hauv lub hwj chim no, lub cev tiv thaiv lub cev kub tsis tshaj nws qhov kev ua haujlwm siab tshaj plaws.
Ntau tshaj plaws kev ua haujlwm kubTmax: Qhov kub tshaj plaws ntawm uas cov cua sov tuaj yeem ua haujlwm tsis tu ncua rau lub sijhawm ntev raws li cov kev mob tshwj xeeb. Ntawd yog, t0- ambient kub.
Cheebtsam Hluav Taws Xob Ntsuas Hluav Taws Xob PM
Ntawm qhov ntsuas kub tau tshwj xeeb, cov nqi tiv thaiv ntawm lub cev ua kom sov los ntawm kev ntsuas tam sim no tuaj yeem tsis quav ntsej txog qhov ntsuas tag nrho. Nws yog feem ntau yuav tsum tau hais tias tus nqi tiv taus kev hloov pauv yog ntau dua 0.1%.
Lub sij hawm ncua: Mar-29-2023