NTC mummunan zafin jiki coefficient thermostat aiki ka'idar

NTC shine takaice na Negative Temperature Coefficient, wanda ke nufin mummunan zafin jiki mai yawa, wanda ke nufin kayan semiconductor ko kayan aiki masu yawa, wanda ake kira NTC thermostat shine mummunan zafin jiki mai yawa. An yi shi da oxides na ƙarfe kamar manganese, cobalt, nickel da jan ƙarfe a matsayin manyan kayan, ta hanyar fasahar yumbu. Wadannan kayan oxide na ƙarfe suna da halayen semiconductor, saboda suna kama da kayan semiconductor kamar germanium da silicon a hanyar gudanarwa. Lokacin da zafin jiki yake ƙasa, wadannan kayan oxide suna da ƙananan adadin masu ɗaukar kaya (electrons da rami), don haka ƙimar juriya ta kasance mafi girma; Yayin da zafin jiki ya tashi, yawan masu ɗaukar kaya ya ƙaru, don haka ƙimar juriya ta rage. NTC thermostats canje-canje a cikin zafin jiki na dakin suna da kewayon 100 ~ 1,000,000 ohms, da zafin jiki na -2% ~ -6.5%. NTC thermostats za a iya amfani da NTC thermostats sosai don auna zafin jiki, sarrafa zafin jiki, zafin jiki diyya da sauransu.

NTC mummunan zafin jiki coefficient thermostat maki

NTC (Negative Temperature Coefficient) yana nufin thermal resistor abubuwa da kayan da ke da mummunan zafin jiki coefficient tare da zafin jiki tashi juriya da exponential dangantaka rage. Wannan kayan ne semiconductor yumbu da aka yi amfani da biyu ko fiye da karfe oxides kamar manganese, jan ƙarfe, silicon, cobalt, baƙin ƙarfe, nickel, zinc da sauransu don cikakken haɗuwa, ƙirƙirar, sintering da sauran ayyuka, za a iya yin thermal resistor da mummunan zafin jiki coefficient (NTC). Its juriya da kayan daidaituwa daban-daban dangane da kayan maki rabo, sintered yanayi, sintered zafin jiki da kuma tsarin yanayi. Yanzu kuma ya bayyana da non-oxide abubuwa NTC thermal resistor kayan da aka wakilta da silicon carbide, tin selenide, tantalum nitride da sauransu.

NTC thermal semiconductor mafi yawa ne oxide yumbu na crystalline tsari ko wasu tsari, tare da mummunan zafin jiki coefficient, juriya darajar za a iya wakiltar a matsayin:

RT, RT0 a cikin tsari ne a lokacin da zafin jiki T, T0 juriya darajar, Bn ne kayan daidaitacce. yumbu hatsi da kanta saboda zafin jiki canje-canje ya sa juriya yawan canje-canje, wanda aka yanke shawarar da semiconductor halaye.

NTC mummunan zafi coefficient zafi mafi muhimmanci aiki ne rayuwa

Tsawon rayuwa NTC thermostat, shi ne haɓaka fahimtar NTC thermostat, jaddada muhimmancin juriya rayuwa. NTC thermostats ne mafi muhimmanci a rayuwa, bayan jure da nau'ikan high daidaito, high m, high abin dogaro, super high zafin jiki, high matsin lamba gwaji, shi har yanzu aiki da kwanciyar hankali na dogon lokaci.
Rayuwa shine muhimmin aikin NTC thermostats, kuma akwai dangantaka ta dialectic tare da sauran sigogi kamar daidaito, ƙwarewa da sauransu. A NTC juriya samfurin dole ne farko dogon rayuwa don tabbatar da wasan ayyukan; Kuma sauran kyakkyawan aiki, ya dogara da samar da tsari ya kai wani matakin fasaha, wanda ya sa NTC dogon rayuwa ya zama yiwuwa.
Yawancin high-tech lantarki kayayyakin, a cikin ultra-high zafin jiki, ultra-high ƙarfin lantarki da sauran mummunan yanayi, bukatar thermostats wasa kwanciyar hankali sarrafa zafin jiki, zafin jiki ma'auni aiki, mafi masana'antun bi NTC thermostats daidaito, hankali, drift darajar da sauran al'ada aiki da kwanciyar hankali wasa, watsi da juriya rayuwa, haifar da NTC ba zai iya aiki na dogon lokaci saboda tasirin lantarki kayayyakin amfani. Don haka, duk daidaito, ƙwarewa, juriya ga zafin jiki, da dai sauransu, ba su da ma'ana.

NTC mummunan zafin jiki coefficient thermostat tarihi

Ci gaban NTC thermostats ya wuce dogon mataki. 1834, masana kimiyya na farko sun gano sulfide na azurfa yana da halayen mummunan zafin jiki. A 1930, masana kimiyya sun gano cewa copper oxide-copper oxide ma yana da halayen mummunan zafin jiki, kuma sun yi amfani da shi cikin nasarar yin amfani da shi a cikin kewayon daidaitaccen zafin jiki na kayan aikin jirgin sama. Daga nan, saboda ci gaban fasahar transistor, binciken thermostats ya sami ci gaba sosai. An haɓaka NTC thermostats a 1960.

NTC mummunan zafin jiki coefficient thermostat zafin jiki kewayon

Yana da ma'auni kewayon gabaɗaya ne -10 ~ + 300 ℃, kuma za a iya yin -200 ~ + 10 ℃, har ma za a iya amfani da + 300 ~ + 1200 ℃ yanayi don auna zafin jiki.

Daidaito na madaidaicin zafin jiki na thermostat na iya kai 0.1 ° C, lokacin zafin jiki na iya zama ƙasa da 10s. Yana dacewa ba kawai ga madaidaicin zafin jiki na hatsi ba, har ma ana iya amfani da shi ga ma'aunin zafin jiki a cikin ajiyar abinci, kiwon lafiya, filin kimiyya, teku, zurfin rami, sama mai tsayi, kankara da sauransu.

"NTC Thermostat Treasure" ne na farko sana'a e-littafi a cikin masana'antu, abun ciki ya ƙunshi daban-daban ilimin da aka shafi NTC thermostats, shi ne muhimmin kayan aiki littafi ga masu sana'a. Abubuwan da ke ƙasa:

NTC thermostats aiki ka'idar, iri, alama wakilci, model wakilci, jagora gabatarwa, sana'a kalmomin cikakken bayani.

Yadda za a ƙayyade irin NTC thermostats da ake buƙata, aikace-aikacen yanayi, daidaito, hankali, kwanciyar hankali, kewayon layi a cikin aikace-aikace na zahiri.

NTC thermostat aikace-aikace a kan ja ruwan inabi kwalba karanta zafin jiki, mai hankali gidan wanka, sanyaya ruwan zafin jiki firikwensin.

Yadda za a yi sauki NTC thermostat juriya gwaji da kuma aminci gwaji[2]

NTC mummunan zafin jiki coefficient thermostats sana'a Terms

Zero ikon juriya darajar RT (Ω)

RT yana nufin ƙimar juriya da aka auna ta amfani da ƙarfin ma'auni wanda ya haifar da canje-canje na ƙimar juriya dangane da kuskuren ma'auni.

Daidaitaccen ƙimar juriya da canjin zafin jiki shine:

RT = RN expB ((1/T 1/TN)

RT: NTC thermostat juriya a zafin jiki T (K).

RN: NTC thermostat juriya darajar a lokacin da aka ƙididdige zafin jiki TN (K).

T: ƙayyade zafin jiki.

B: NTC thermistor kayan daidaituwa, kuma ana kira thermal index.

exp: ƙididdigar da ke tushen lambar halitta e (e = 2.71828...).

Wannan dangantaka ita ce ƙididdigar kwarewa da ke da wasu daidaito kawai a cikin iyakantaccen iyakar zafin jiki na TN ko ƙididdigar juriya ta RN, saboda daidaitaccen kayan aiki B kanta ma aiki ne na zafin jiki T.

Rated sifili ikon juriya darajar R25 (Ω)

Dangane da ƙa'idodin ƙasa, ƙimar juriya ta ikon sifili shine ƙimar juriya ta R25 da aka auna ta NTC thermostat a zafin jiki na 25 ℃, wannan ƙimar juriya ita ce ƙimar juriya ta NTC thermostat. Yawancin lokacin da aka ce NTC thermostat yawan juriya darajar, kuma yana nufin wannan darajar.

Abubuwan da ke daidaitawa (zafi) darajar B

B darajar da aka bayyana a matsayin:

B=T1*T2/(T2-T1)ln(RT1/RT2)

RT1 : Zero iko juriya darajar a zafin jiki T1 (K).

RT2 : Zero iko juriya darajar a zafin jiki T2 (K).

T1 da T2: Abubuwan zafin jiki biyu da aka ƙayyade (K).

Don NTC thermostats da aka saba amfani da su, ƙimar B yawanci tana tsakanin 2000K ~ 6000K.

Zero ikon juriya zafin jiki (αT)

A ƙarƙashin zafin jiki da aka ƙayyade, dangantakar canje-canje na ƙimar juriya ta NTC thermostat mai ƙarancin ƙarfi da ƙimar canje-canje na zafin jiki wanda ya haifar da canjin.

αT : Zero iko juriya zafin jiki a lokacin zafin jiki T (K).

RT: Zero iko juriya darajar a lokacin zafin jiki T (K).

T: zafin jiki (T).

B: Kayan daidaituwa.

Matsayin watsawa (δ)

A ƙarƙashin zafin jiki na muhalli da aka ƙayyade, NTC thermistor scatter factor shine ƙimar canjin ƙarfin da aka rarraba a cikin juriya da canjin zafin jiki daidai da juriya.

δ: NTC thermistor watsawa coefficient, （ mW/ K ）。

P: NTC thermostat amfani da ikon (mW).

T: Lokacin da NTC thermostats cinye ikon P, resistor daidai zafin jiki canji (K).

Hot lokaci m (τ)

A ƙarƙashin yanayin ikon sifili, lokacin da zafin jiki ya canza, zafin jiki na thermostat ya canza 63.2% na lokacin da ake buƙata lokacin da bambancin zafin jiki biyu ya fara, lokacin zafi na zafi yana daidai da ƙarfin zafi na NTC thermostat kuma yana daidai da ƙimar warwarewa.

τ: zafi lokaci daidaitacce.

C: NTC thermal ƙarfin.

δ: The scattering coefficient na NTC thermostats.

Rated ikon Pn

A ƙarƙashin yanayin fasaha da aka tsara, thermostats suna amfani da ikon da aka ba da izini don aiki na dogon lokaci. A ƙarƙashin wannan ikon, zafin jiki na juriya kanta bai wuce mafi girman zafin jiki na aiki ba.

Max aiki zazzabi Tmax

A ƙarƙashin yanayin fasaha da aka ƙayyade, thermistor iya ba da izinin mafi girman zafin jiki don aiki na dogon lokaci. watau:

T0 - yanayin zafin jiki.

Ma'auni ikon Pm

thermostats A ƙarƙashin zafin jiki na muhalli da aka ƙayyade, canje-canjen juriya da aka haifar da ƙididdigar ƙididdigar ƙididdigar ƙididdigar ƙididdigar ƙididdigar ƙididdigar ƙididdigar ƙididdigar ƙididdigar ƙididdigar ƙididdigar ƙididdigar ƙididdigar ƙididdigar ƙididdigar ƙididdigar ƙidi

Yawancin buƙatun ƙimar juriya ya fi girma fiye da 0.1%, sa'an nan ƙarfin ma'auni na Pm shine:

Abubuwan zafin jiki na juriya

NTC thermostats zafin jiki halaye za a iya nuna a ƙasa kusan:

Tsarin:

RT: Zero ikon juriya darajar a zafin jiki T.

A: Abubuwan da suka shafi halayen jiki da girman lissafi na kayan thermostat.

A: Darajar B.

T: zafin jiki (k).

Mafi daidai maganganu ne:

Tsarin:

RT: Zero iko juriya darajar thermistor a zafin jiki T.

T: don cikakken zafin jiki darajar, K；

A, B, C, D: don takamaiman daidaituwa.

NTC mummunan zafin jiki coefficient thermostats R-T halaye

B darajar iri daya, daban-daban tsayayya darajar R-T halaye curve zane

Daidai juriya darajar, daban-daban B darajar NTC thermostats R-T halaye curve zane

NTC thermostats don auna zafin jiki, sarrafawa

Tsarin Bayani

Epoxy kunshin jerin NTC thermostats

Glass kunshin jerin NTC thermostats

Aikace-aikace kewaye Chart

Temperature ma'auni (Whiston Bridge kewaye)

zafin jiki Control

aikace-aikace Design

lantarki thermometer, lantarki shekara-shekara kalanda, lantarki agogo zazzabi nuni, lantarki kyauta;

sanyi dumama kayan aiki, dumama thermostat lantarki;

Automotive lantarki zafin jiki iko kewaye;

zazzabi firikwensin, zazzabi mita;

kayan aikin lantarki na likita, kayan wanka na lantarki;

Baturi na wayar hannu da caji.