Mphamvu Wonjezerani Protection

Mphamvu Wonjezerani Phukusi

Pali makhalidwe ena amene amadza mphamvu kotunga ntchito. Zimenezi ndi anthu pofuna kuteteza chakudya, zomwe zili m'munsimu.

Overcurrent : A mode kulephera chifukwa cha linanena bungwe katundu panopa kuti ndi wamkulu kuposa yake. Iwo okha ndi pazipita imapanga panopa magetsi m'manja mwa madera chitetezo mkati. Komanso akhoza kuwononga magetsi zina. Short madera pakati pa mphamvu kotunga linanena bungwe ndi nthaka angalenge mafunde mwa dongosolo zocheperapo yekha ndi pazipita imapanga panopa ndi impedance mkati mwa magetsi. Popanda kuchepetsa, izi panopa mkulu zingachititse kutenthedwa ndi kuwononga magetsi komanso katundu ndi interconnects ake (kuda kusindikizidwa dera bolodi, zingwe). Choncho, katundu kwambiri mphamvu ayenera panopa Kuchepetsa (overcurrent chitetezo) imene imayendetsa ngati linanena bungwe panopa kuposa ndi chinaneneratu pazipita.

Overtemperature:  A kutentha loposa mwachindunji kufunika kotunga mphamvu ayenera kupewedwa kapena zingayambitse mphamvu kotunga kulephera. Kugwiritsa opaleshoni kutentha akhoza kuwononga magetsi ndi madera olumikizidwa kwa izo. Choncho, katundu ambiri amagwiritsira ntchito kachipangizo kutentha ndi madera ena okhudzidwa kuletsa chakudya ngati opaleshoni ake kutentha kuposa mtengo yeniyeni. Makamaka, semiconductors ntchito mu chakudya kulimbana ndi kutentha malire awo mwachindunji. Amapereka zambiri monga chitetezo overtemperature kuti akutembenukira kutali ndi chakudya ngati kutentha kuposa mwachindunji malire.

Overvoltage:  Izi mode kulephera kumachitika ngati linanena bungwe voteji amapita pamwamba mwachindunji kufunika DC, amene angathe wokakamiza kwambiri DC voteji kuti kumawononga madera katundu. Childs, kompyuta dongosolo katundu chingathe kupirira mpaka 20% overvoltage popanda anakhumudwitsa kuwonongeka okhazikika. Ngati izi ndi kuganizira, kusankha chakudya kuti minimizes chiopsezo izi. Amapereka zambiri monga chitetezo overvoltage ndimachititsa chakudya kuchokera ngati linanena bungwe voteji kuposa ndi chinaneneratu kuchuluka. Njira ina ndi crowbar zener diode aliyense wokhala panopa zokwanira pakhomo overvoltage kuti imayendetsa mphamvu-kotunga panopa Kuchepetsa ndipo anatseka pansi.

Zofewa Start:  Inrush malire panopa zina pamafunika pamene mphamvu choyamba ntchito kapena pamene matabwa zatsopano otentha plugged. Childs, izi zimatheka ndi yofewa-chiyambi dera kuti kubweza kuwuka koyamba panopa kenako amalola ntchito bwinobwino. Ngati sanalandire chithandizo, ndi inrush panopa akhoza kupanga panasonkhana mkulu nawuza panopa kuti zotsatira linanena bungwe voteji. Ngati izi ndi yofunika, kusankha chakudya ndi Mbali imeneyi.

Undervoltage Lockout:  Mumadziwika monga UVLO, likukhalira yobweretsa pa akafika mkulu zokwanira athandizira voteji ndi kutembenukira kutali chakudya ngati athandizira voteji akugwa pansi pa mtengo ena. Mbali imeneyi ntchito katundu zikugwira ntchito mphamvu zofunikira komanso mphamvu batire. Pamene opareshoni mphamvu batire ofotokoza UVLO disables ndi magetsi (komanso dongosolo) ngati batire kukha moti akutsikira okwanira a athandizira voteji otsika kwambiri kulola ntchito yodalirika.

Mu atomu Ngakhale (EMC):  umakhudzana njira mamangidwe omwe kuchepetsa mu atomu kusokonezedwa (EMI). Mu katundu lophimba-mode Mphamvu, DC voteji ndi wotembenuka ndi akanadulidwa kapena waveform pulsed. Zimenezi zimachititsa mbali ya magetsi kupanga phokoso yopapatiza-gulu (EMI) pa zenizeni za kusinthitsa pafupipafupi ndi harmonics ake kugwirizana. Kuti muli phokoso, opanga ayenera kuchepetsa ankalankhula kapena kuchitikira mpweya.

Mphamvu kotunga opanga kuchepetsa EMI cheza ndi kamodzi mwa kundipatsako mu bokosi chitsulo kapena utsi wokutira mlandu ndi zinthu zachitsulo. Opanga amafunika kulabadira kamangidwe mkati mwa kundipatsako ndi Kulumikizana ameneyo apita ndi mwa kundipatsako, zimene kupanga phokoso.

Ambiri mwa kusokonezedwa imachitika pa mzere mphamvu chifukwa cha waukulu kusinthitsa transistor kapena linanena bungwe rectifiers. Ndi mphamvu chinthu kudzudzulidwa ndi choyenera thiransifoma kamangidwe, kugwirizana ndi koziziritsira ndi fyuluta kamangidwe, mphamvu-kotunga wopanga kungachepetse imachitika kusokonezedwa kotero kuti chakudya akhoza kukwaniritsa EMI zolimbana bungwe approvals popanda anakhumudwitsa kwambiri mtengo fyuluta. Yang'anani nthawi zonse kuona kuti mphamvu kotunga wopanga likukwaniritsa zofunika za zolimbana mfundo EMI.


Post nthawi: Apr-23-2018
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