Chitofu cha PTC ndi chitofu cha PT100

Ma thermistors amagwiritsidwa ntchito kwambiri pozindikira kutentha ndi ntchito zowongolera m'mafakitale osiyanasiyana. Pakati pa mitundu yosiyanasiyana yama thermistors, PTC (Positive Temperature Coefficient) ndi PT100 ndi mitundu iwiri yomwe imagwiritsidwa ntchito kwambiri. Mitundu yonse iwiri ya ma thermistors imagwiritsidwa ntchito poyesa kutentha, koma ili ndi makhalidwe ndi ntchito zosiyana. Kumvetsetsa kusiyana pakati pa ma thermistors a PTC ndi PT100 ndikofunikira kwambiri posankha sensa yoyenera malinga ndi zosowa zanu zowunikira kutentha.

Chotenthetsera cha PTC:
Ma thermistore a PTC ndi ma resistors omwe amamva kutentha kwambiri omwe ali ndi coefficient yabwino ya kutentha, zomwe zikutanthauza kuti kukana kwawo kumawonjezeka pamene kutentha kukukwera. Ma thermistore amenewa amapangidwa ndi zinthu zadothi monga barium titanate, ndipo kukana kwawo kumasintha kwambiri ndi kusintha kwa kutentha. Ma thermistore a PTC amagwiritsidwa ntchito kwambiri pa ntchito zomwe zimafuna chitetezo cha kutentha kwambiri, kudziletsa, komanso kuchepetsa mphamvu yamagetsi.
Chimodzi mwa zinthu zazikulu zomwe PTC thermistors imachita ndi mphamvu zawo zodzilamulira. Pamene kutentha kukukwera, kukana kwa PTC thermistor kumawonjezeka, zomwe zimapangitsa kuti mphamvu yamagetsi ichepe. Khalidwe lodzilamulira lokhalitsali limapangitsa PTC thermistors kukhala yoyenera kugwiritsidwa ntchito monga kuteteza mota, zinthu zotenthetsera, komanso chitetezo champhamvu kwambiri m'mabwalo amagetsi.
Chojambulira kutentha:
Ma sensor otenthetsera ozungulira amagwiritsidwa ntchito mu zida zamagetsi kuti aziyang'anira kutentha kwa ma windings mu ma mota, ma transformer ndi zida zina zamagetsi. Ma sensor awa ndi ofunikira kwambiri popewa kutentha kwambiri ndikuwonetsetsa kuti zida zikugwira ntchito bwino. Ma sensor otenthetsera ozungulira nthawi zambiri amagwiritsa ntchito ma thermistors a PTC ngati zinthu zowunikira kutentha chifukwa ali ndi mawonekedwe odzisinthira okha ndipo amakhudzidwa kwambiri ndi kusintha kwa kutentha.
Chotenthetsera cha PT100:
PT100 ndi chipangizo chowunikira kutentha kwa resistance temperature (RTD) chomwe chimagwiritsa ntchito platinamu ngati chinthu chowunikira. Mosiyana ndi ma thermistors a PTC, kukana kwa ma thermistors a PT100 kumawonjezeka motsatizana ndi kutentha, kutsatira ubale wokhazikika wa resistance-temperature womwe wafotokozedwa ndi International Electrotechnical Commission (IEC). Ma thermistors a PT100 amadziwika ndi kulondola kwawo kwakukulu, kukhazikika kwawo komanso kuchuluka kwa kuyeza kutentha, zomwe zimapangitsa kuti akhale abwino kwambiri poyesa kutentha molondola.
Chitofu cha PT100 chili ndi kukana kwa 100 ohms pa 0°C ndipo chimawonjezeka ndi pafupifupi 0.385 ohms pa digiri iliyonse ya kukwera kwa kutentha. Ubale wolunjika uwu pakati pa kukana ndi kutentha umalola kuyeza kutentha kolondola komanso kodalirika pa kutentha kwakukulu.
Kusiyana pakati pa PTC ndi PT100:
Kusiyana kwakukulu pakati pa ma thermistors a PTC ndi PT100 ndi makhalidwe awo otsutsa kutentha. Ma thermistors a PTC amasonyeza ubale wosagwirizana ndi kutentha ndi coefficient yabwino ya kutentha, pomwe ma thermistors a PT100 ali ndi ubale wotsutsana ndi kutentha ndi coefficient ya kutentha pafupifupi zero.
Kusiyana kwina kodziwika bwino ndi zipangizo zomwe zimagwiritsidwa ntchito popanga. Ma thermistors a PTC nthawi zambiri amapangidwa ndi zinthu zadothi, pomwe ma thermistors a PT100 amagwiritsa ntchito platinamu ngati chinthu chowunikira. Kugwiritsa ntchito platinamu mu ma thermistors a PT100 kumathandiza kuti akhale olondola komanso okhazikika, makamaka m'malo ovuta kwambiri m'mafakitale ndi m'ma laboratories.
ntchito:
Ma thermistors a PTC angagwiritsidwe ntchito poteteza kutentha kwambiri, zinthu zotenthetsera zodzilamulira, ma circuits oletsa magetsi komanso kuteteza mota. Khalidwe lawo lodzilamulira limawapangitsa kukhala oyenera kugwiritsidwa ntchito pomwe kuwongolera kutentha ndi chitetezo ndikofunikira kwambiri.
Koma ma thermistors a PT100 amagwiritsidwa ntchito kwambiri m'mafakitale ndi m'ma laboratories kuti ayese kutentha molondola. Amagwiritsidwa ntchito kwambiri m'makina owunikira kutentha, zipinda zachilengedwe, machitidwe a HVAC, ndi ntchito zofufuza zasayansi komwe kuzindikira kutentha molondola komanso kokhazikika ndikofunikira.
Mwachidule, ngakhale kuti ma thermistors a PTC ndi PT100 amagwiritsidwa ntchito pozindikira kutentha, ali ndi makhalidwe ndi ntchito zosiyanasiyana. Ma thermistors a PTC amadziwika ndi khalidwe lawo lodzilamulira ndipo nthawi zambiri amagwiritsidwa ntchito m'mapulogalamu omwe amafuna chitetezo cha kutentha kwambiri komanso kuchepetsa mphamvu yamagetsi. Koma ma thermistors a PT100 amapereka kulondola kwakukulu komanso kukhazikika, zomwe zimapangitsa kuti akhale oyenera kuyeza kutentha molondola m'mafakitale ndi m'ma laboratories. Kumvetsetsa kusiyana pakati pa ma thermistors awa ndikofunikira kwambiri posankha sensa yoyenera yomwe ikugwirizana ndi zosowa zanu zenizeni zowunikira kutentha.