Phau Ntawv Qhia Xaiv rau PTC tus cua kub rau overcurrent thiab ntau dhau kev tiv thaiv

Phau Ntawv Qhia Xaiv rau PTC tus cua kub rau overcurrent thiab ntau dhau kev tiv thaiv

1. Qhov siab tshaj plaws ua hauj lwm voltage

Thaum PTC cov cua nab kuab txuas nrog hauv cov kab ke hauv Circuit Court, tsuas yog ib feem me me ntawm lub voltage tseem nyob hauv nws thaum lub sijhawm ua haujlwm. Thaum nws ua kom zoo thiab kwv yees lub siab- Kuj muaj xeev, nws yuav tsum tau txais ze tag nrho cov khoom siv hluav taws xob voltage. Yog li ntawd, thaum xaiv cov thtc thermistor, xyuas kom meej tias nws muaj qhov siab tshaj plaws hluav taws xob, thaum tseem yuav tau siv lub zog hluav taws xob hluav taws xob hloov pauv.

2. Tsis -} khiav hauj lwm tam sim no thiab ua haujlwm tam sim no

Txhawm rau kom ntseeg tau yooj yim, kev ua haujlwm tam sim no yuav tsum muaj tsawg kawg ob zaug tsis - khiav haujlwm tam sim no.

Vim tias qhov kub kub cuam tshuam rau ob qho tib si tsis {{0} {{{1} {{1} {} Lub teeb meem xwm txheej yuav tsum tau txiav txim siab. Rau qhov tsis -} khiav haujlwm tam sim no, xaiv tus nqi rau qhov siab tshaj plaws uas tau tso cai rau qhov kub siab tshaj; Rau kev khiav lag luam tam sim no, xaiv tus nqi rau cov neeg nyob hauv qis qis.

3. Qhov siab tshaj plaws tso cai tam sim no ntawm qhov siab tshaj plaws ua haujlwm voltage

Thaum twg PTC tus thermistor xav tau rau kev tiv thaiv, tshawb xyuas seb puas muaj cov xwm txheej hauv Circuit Court uas tuaj yeem tsim kom muaj txiaj ntsig ntau tshaj plaws tso cai tus nqi. Qhov no feem ntau yog hais txog cov xwm txheej uas muaj kev pheej hmoo ntawm lub luv luv circuit Court. Cov ntaub ntawv cov ntaub ntawv qhia meej tus nqi siab tshaj plaws. Tshaj dhau tus nqi no tej zaum yuav ua rau kev puas tsuaj lossis ua kom tiav PTC tus cua kub.

4. Hloov ntsuas kub (Curie kub)

Huaju muaj overcurrent tiv thaiv Cheebtsam nrog kev curie kub ntawm 75 degree, 85 degree, 105 degree, thiab 120 degree. Qhov tsis -} khiav hauj lwm tam sim no nyob ntawm curie kub thiab lub cheeb ntawm PTC thermistor nti. Txhawm rau txo tus nqi, lub siab cleie kub thiab ib qho me me feem yuav tsum tau xaiv. Tsis tas li ntawd, kev txiav txim siab yuav tsum tau muab rau seb puas muaj PTC tus kws kho cua sov zoo li kub thiab txias tuaj yeem ua rau cov kev mob tshwm sim uas tsis xav tau hauv Circuit Court. Feem ntau, qhov ntsuas kub los tsim kom muaj qhov siab tshaj plaws ntawm kev ua haujlwm kub txog 20 txog 40 degree.

5. Ib puag ncig cuam tshuam

Thaum nthuav tawm cov tshuaj lom neeg lossis siv cov pa hluav taws xob lossis muab cov lim dej, kev ceev faj heev yuav tsum tau ua. Qhov txo ntawm lub barium Titanate ceramic tuaj yeem ua rau txo qis hauv PTC thermistor qhov ua tau zoo. Kev hloov pauv hauv Thermal Conductivity los ntawm potting potting kuj tseem tuaj yeem ua rau hauv zos overheating thiab puas rau ptc thermistor.

Qhia rau xaiv cov hluav taws xob hloov hluav taws xob ntau dhau

Lub zog hloov hluav taws xob muaj qhov sib txuas ua ntej ntawm 220V, kev nthuav dav theem nrab ntawm 16V, thiab ib qho tam sim no ntawm 1.5A. Thaum cov theem nrab yog qhov txawv txav, thawj tam sim no yog kwv yees li 330ma, thiab kev tiv thaiv yuav tsum tau ua li ntawm 10 feeb. Lub transformer cov kev ua haujlwm ntawm thaj chaw kub ntawm -10℃rau 40 degree, nrog kub ntxhov ntawm 15℃rau 20℃thaum lub sijhawm ua haujlwm ib txwm ua. PTC thermistor tau nruab ze rau lub transformer. Thov xaiv ib lub PTC tus cua sov rau kev tiv thaiv thawj zaug.

1. Txiav txim siab qhov siab tshaj plaws voltage

Muab cov transformer ua haujlwm voltage yog 220V, suav rau kev hloov pauv fais fab yuav tsum yog 220V x ({%) {} v. Qhov siab tshaj plaws ua hauj lwm voltage ntawm PTC thermistor yog 265v.

2. Txiav txim siab qhov tsis-} khiav hauj lwm tam sim no

Kev ntsuas thiab ntsuas ntsuas pom tias tus hloov pauv tau tam sim no yog 125mA thaum lub sijhawm ua haujlwm ib txwm muaj. Xav txog qhov chaw kub ntawm PTC kub sov tuaj yeem ncav cuag mus txog 60 degree, tsis yog {}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}} Nrhiav cov haujlwm tam sim no
Xav tias qhov kub tshaj plaws ntawm PTC thermistor qhov chaw nyob tau mus txog -10℃yuav tsum yog 300-340, nrog lub sijhawm ua haujlwm ntawm kwv yees li 5 feeb.
4. Txiav txim siab cov rated xoom - Power Protistor R25
Thaum PTC tus cua nab yog txuas rau hauv cov thawj, lub voltage poob tsim tsim kom tsawg, thiab ptc thermistor tus kheej cov cua sov yuav tsum tau txo qis. Feem ntau, qhov voltage poob hla PTC tus cua kub yuav tsum tsawg dua 1% ntawm tag nrho cov khoom siv fais fab tag nrho. R25 yog xam raws li hauv qab no:
220V × 1% ÷ 0.125A = 17.6 Ω
5. Txiav txim siab qhov siab tshaj plaws
Raws li kev ntsuas tiag tiag, thaum transformer's aliecary yog luv {{circuited, thawj tam sim no tuaj yeem ncav cuag 500mA. Considering the higher current flowing when a partial short occurs in the primary winding, the maximum current of the PTC thermistor should be above 1A. 6. Determine the Curie Temperature and Dimensions
Xav tias qhov kub tshaj plaws ntawm PTC thermistor qhov chaw nyob tau mus txog li 60 degree, ntxiv 40℃rau qhov no thaum xaiv cov kev kho kub. Piv txwv li, xav txog qhov kub ntawm 100 degree. Txawm li cas los xij, xav txog tus nqi qis thiab qhov tseeb tias PTC thermistor tsis tau nruab rau hauv transformer winding, nws qhov chaw siab dua yuav tsis cuam tshuam rau cov transformer. Yog li ntawd, ib tug curie kub ntawm 120℃tuaj yeem raug xaiv. Qhov no txo ​​txoj kab uas hla ntawm PTC thermistor thiab txo cov nqi.
7. Hais txog PTC Thermistor Qauv
Raws li cov cai saum toj no, tom qab kev sab laj ntawm daim ntawv Huajo, MZ12A-120M15rm150 tau xaiv.
Qhov siab tshaj plaws ua hauj lwm voltage=265 v, rated xoom {}}}}}}}}}}}}}