PTC rhaub cov yam ntxwv thiab qhov zoo thiab qhov tsis zoo

Cov yam ntxwv tseem ceeb ntawm PTC:
1. Cov yam ntxwv ntawm qhov kub thiab txias
Qhov kev tiv thaiv ntawm cov khoom siv hluav taws xob ntawm PTC lub rhaub dej kub nce nrog qhov kub thiab txias, thiab nws cov nqi kuj muaj qhov kub thiab txias sib piv rau qhov tsawg kawg nkaus tus nqi, uas yog Curie point. Thaum qhov kub thiab txias qis dua qhov Curie point, cov khoom siv hluav taws xob ntawm PTC rhaub muaj qhov ntsuas kub tsis zoo tib yam li cov khoom siv semiconductor dav dav; Thaum qhov kub siab tshaj qhov Curie point, cov khoom siv hluav taws xob ntawm PTC lub rhaub muaj qhov ntsuas qhov ntsuas kub zoo. Lub sijhawm no, yuav muaj ntau yam kev hloov pauv hauv impedance, xws li txawv txav impedance (feem ntau hu ua PTC phenomenon), tab sis nws impedance kuj muaj qhov kub thiab txias. Thaum koj hloov barium phthalate nrog lanthanide cov ntsiab lus, koj yuav tau txais ntau yam ntaub ntawv PTC ntawm qhov kub sib txawv.
2. Cov yam ntxwv ntawm lub sijhawm tam sim no
Lub sijhawm tam sim no tus yam ntxwv yog hais txog qhov hloov pauv ntawm tam sim no dhau lub sijhawm thaum PTC tivthaiv siv qhov hluav taws xob. Tam sim no thaum pib ntawm lub zog yog hu ua qhov pib tam sim no, thiab tam sim no thaum lub sij hawm ncav cuag thermal equilibrium yog hu ua residual tam sim no. Ntawm qhov ntsuas kub ib puag ncig, PTC thermistor ntxiv rau qhov pib tam sim no (kom paub meej qhov kev khiav hauj lwm tam sim no) tau muab. Thaum qhov tam sim no ntawm lub thermistor txo mus rau 50 feem pua ​​​​ntawm qhov pib tam sim no los ntawm PTC, lub sij hawm dhau los yog lub sijhawm ua haujlwm. Cov yam ntxwv ntawm lub sijhawm tam sim no yog cov yam ntxwv tseem ceeb rau kev tsis siv neeg demagnetization ntawm PTC Cheebtsam, ncua sijhawm pib ntawm PTC Cheebtsam, thiab kev tiv thaiv overload ntawm PTC Cheebtsam.
Qhov zoo thiab qhov tsis zoo ntawm PTC cua sov caij:
Piv nrog rau cov khoom siv hluav taws xob feem ntau siv nickel chromium hluav taws xob cua sov hlau, qhov zoo ntawm PTC cov khoom siv cua sov yog:
1. Vim tias lub caij PTC ua kom muaj cua sov tag nrho yam tsis muaj nplaim taws qhib, thiab cov khoom siv nws tus kheej muaj cov yam ntxwv ntawm kev tswj kub tsis siv neeg. Tom qab dhau los ntawm Curie point, PTC qhov tshwm sim ua rau muaj kev nce ntxiv hauv kev tiv thaiv thiab txo qis tam sim no, ua rau txo qis hauv kev siv hluav taws xob thiab tsis muaj qhov kub thiab txias ntxiv lawm. Yog li ntawd, kev nyab xeeb ntawm kev siv yog siab.
2. Raws li qhov ntsuas kub ib puag ncig hloov, tus nqi calorific yuav hloov kho yam tsis muaj kev siv hluav taws xob tsis zoo.
3. Qhov cuam tshuam tsawg kawg nkaus los ntawm kev hloov pauv ntawm cov khoom siv hluav taws xob hluav taws xob, qhov kev sim qhia tau hais tias lub zog hluav taws xob muaj qhov hloov pauv ntau yam tsis muaj kev cuam tshuam rau cov nqi thermal ntawm PTC cov khoom.
4. Kev tswj cov cua sov yog ib qho yooj yim vim tias lub zog cua sov ntawm PTC cua sov cov ntsiab lus muaj feem xyuam rau cov cua sov tso tawm coefficient D, uas nyob ntawm cov duab, qauv, qhov loj, thiab cov cua kub tso tawm ntawm PTC cov khoom. Qhov no txhawb qhov kev hloov pauv tas mus li ntawm cov hluav taws xob tso tawm coefficient D, yog li cov nqi hluav taws xob kuj tseem tuaj yeem tswj tau tas li.
5. Qhov kub nce hysteresis ntawm PTC Cheebtsam yog me me, thiab cov txheej txheem los ntawm lub hwj chim mus rau stability yog ceev ceev.
6. Cov teeb meem uas twb muaj lawm: Lub thermal conductivity ntawm PTC Cheebtsam yog tsawg, yog li lub teb lub zog ntxiv rau cov khoom tsis tuaj yeem loj dhau, thiab Curie point kub tsis tuaj yeem siab dhau.