Darajar Resistance Power Zero RT (Ω)
RT yana nufin ƙimar juriya da aka auna a ƙayyadaddun zazzabi T ta amfani da ma'aunin ƙarfin da ke haifar da canji mara kyau a ƙimar juriya dangane da jimlar kuskuren auna.
Dangantaka tsakanin ƙimar juriya da canjin zafin na'urorin lantarki shine kamar haka:
RT = RN expB (1/T - 1/TN)
RT: NTC thermistor juriya a zazzabi T (K).
RN: NTC thermistor juriya a rated zazzabi TN (K).
T: Ƙayyadadden zafin jiki (K).
B: Material m na NTC thermistor, kuma aka sani da thermal sensitivity index.
exp: exponent dangane da lambar halitta e (e = 2.71828…) .
Dangantakar tana da ma'ana kuma tana da matakin daidaito kawai a cikin iyakataccen kewayon zazzabi mai ƙima ko ƙimar juriya RN, tunda madaidaicin kayan B shine kansa aikin zazzabi T.
Ƙimar Ƙarfin Ƙarfin Wuta R25 (Ω)
Dangane da ma'aunin ƙasa, ƙimar juriyar ƙarfin sifili ita ce ƙimar juriya R25 da aka auna ta thermistor NTC a ma'aunin zafin jiki na 25 ℃. Wannan ƙimar juriya ita ce ƙimar juriyar ƙima ta thermistor NTC. Yawanci ya ce NTC thermistor nawa juriya darajar, kuma yana nufin darajar.
Material Constant (ma'aunin hankali na thermal) ƙimar B (K)
An bayyana ƙimar B da:
RT1: Sifili ƙarfin juriya a zazzabi T1 (K).
RT2: Ƙimar juriyar wutar lantarki a zazzabi T2 (K).
T1, T2: Yanayin zafi guda biyu ƙayyadaddun (K).
Ga ma'aunin zafin jiki na NTC na kowa, ƙimar B yana daga 2000K zuwa 6000K.
Sifili Power Resistance Temperature Coefficient (αT)
Matsakaicin canjin dangi a cikin juriya na sifili na ma'aunin zafin jiki na NTC a ƙayyadadden zafin jiki zuwa canjin zafin jiki wanda ke haifar da canji.
αT: sifili ikon juriya zazzabi coefficient a zazzabi T (K).
RT: Ƙimar juriyar wutar lantarki a zazzabi T (K).
T: Zazzabi (T).
B: Material dindindin.
Rarraba Coefficient (δ)
A ƙayyadadden zazzabi na yanayi, ƙimar watsawar NTC thermistor shine rabon ƙarfin da aka watsar a cikin resistor zuwa daidaitaccen canjin zafin na resistor.
δ: rarrabuwa coefficient na NTC thermistor, (mW/K).
△ P: Ƙarfin da NTC thermistor (mW) ke cinyewa.
△ T: NTC thermistor yana cin wuta △ P, daidaitaccen canjin zafin jiki na resistor (K).
Matsakaicin Lokacin Zazzagewar Kayan Wutar Lantarki (τ)
Ƙarƙashin yanayin wutar lantarki, lokacin da zafin jiki ya canza ba zato ba tsammani, zafin jiki na thermistor yana canza lokacin da ake buƙata don 63.2% na bambance-bambancen zafin jiki biyu na farko. Matsakaicin lokacin zafi ya yi daidai da ƙarfin zafi na NTC thermistor kuma ya yi daidai da ƙayyadaddun rarrabuwar sa.
τ : thermal lokaci akai-akai (S).
C: Ƙarfin zafi na NTC thermistor.
δ: dissipation coefficient na NTC thermistor.
Ƙarfin Ƙarfi Pn
Amfani da wutar lantarki mai ƙyalli na thermistor a cikin ci gaba da aiki na dogon lokaci ƙarƙashin ƙayyadaddun yanayin fasaha. Ƙarƙashin wannan ƙarfin, juriya zafin jiki ba zai wuce iyakar zafin aiki ba.
Matsakaicin zafin aikiTmax: matsakaicin zafin jiki wanda thermistor zai iya aiki ci gaba na dogon lokaci a ƙarƙashin ƙayyadaddun yanayin fasaha. Wato T0- zafin yanayi.
Abubuwan lantarki suna auna ƙarfin Pm
A ƙayyadadden zafin yanayi, ƙimar juriya na juriya mai zafi ta wurin auna halin yanzu ana iya yin watsi da shi dangane da jimlar kuskuren auna. Ana buƙatar gabaɗaya cewa canjin ƙimar juriya ya fi 0.1%.
Lokacin aikawa: Maris 29-2023