Chitetezo cha Charger ku Overvoltage
Masiku ano, zipangizo zamagetsi zakhala zofunika kwambiri pa moyo watsiku ndi tsiku. Pakati pa zipangizozi, ma charger amagwira ntchito yofunika kwambiri pakusunga kuyenda ndi kugwira ntchito kwa zipangizo monga mafoni am'manja, ma laputopu, ndi mapiritsi. Komabe, ma charger amathanso kukhala ofooka ngati alibe njira zodzitetezera zokwanira, makamaka ku mphamvu yamagetsi yochulukirapo. Mphamvu yamagetsi yochulukirapo imatha kuwononga zipangizo komanso kuyika pachiwopsezo chitetezo. Chifukwa chake, ndikofunikira kumvetsetsa ndikukhazikitsa njira zodzitetezera mphamvu yamagetsi yochulukirachulukira ya ma charger.
Kumvetsetsa Kuchuluka kwa Mphamvu yamagetsi
Kuchuluka kwa mphamvu zamagetsi ndi vuto lomwe mphamvu zamagetsi zomwe zili mu dera zimapitirira malire okhazikika. Kuchuluka kwa mphamvu zamagetsi kumatha kuchitika mwadzidzidzi (kukwera) kapena kukhala kwa nthawi yayitali (kupitirira). Zina mwa zifukwa zomwe zimapangitsa kuti mphamvu zamagetsi zichuluke ndi monga kukwera kwa mphamvu zamagetsi komwe kumachitika chifukwa cha mphezi, kusokonezeka kwa gridi yamagetsi, kapena kulephera kugwira ntchito bwino kwa zigawo zina. Mphamvu zamagetsi zikachuluka, zipangizo zamagetsi zimakhala pachiwopsezo cha kuwonongeka kwakukulu monga moto, kusungunuka, kapena kuphulika.
Zigawo Zazikulu za Dongosolo Loteteza Mphamvu Yopitirira Muyeso
Dongosolo loteteza mphamvu zamagetsi zomwe zili mu charger nthawi zambiri limakhala ndi zigawo zikuluzikulu zingapo zomwe zimagwira ntchito mogwirizana. Izi ndi zigawo zofunika kwambiri mu dongosololi:
1. Varistor (Metal Oxide Varistor – MOV):
Ma Varistors amagwira ntchito ngati chitetezo chachikulu ku kukwera kwa magetsi. Ma MOV amagwira ntchito pochepetsa kukana pamene magetsi akuchulukirachulukira, motero amalola magetsi ochulukirapo kupita pansi kapena njira ina yotetezeka.
2. Diode ya Zener:
Ma diode a Zener amagwiritsidwa ntchito m'ma circuits kuti asunge magetsi pamlingo winawake. Pamene magetsi apitirira magetsi owonongeka, diode ya Zener imayamba kuyendetsa magetsi, motero imateteza magetsi otsatira ku magetsi ochulukirapo.
3. Polyswitch (Polymeric Positive Temperature Coefficient – PPTC):
Polyswitch ndi mtundu wa resistor womwe umasintha kukana kwake kutengera kutentha. Pamene mphamvu yamagetsi kapena mphamvu yamagetsi yochulukirapo ichitika, polyswitch imatentha ndikuwonjezera kukana kwake, motero imasokoneza kayendedwe ka mphamvu yamagetsi.
4. Chitoliro Chotulutsira Mpweya (GDT):
Ma GDT amagwiritsa ntchito mpweya wozungulira mu chubu kuti apereke mphamvu pamagetsi okwera. Mpweya womwe uli mu chubucho ukakhala wokwera kwambiri, umakhala woyendetsa mphamvu ndikuyendetsa mphamvuyo pansi, kuteteza dera kuti lisawonongeke.
5. Chothyola Dera:
Chotsekera mawaya chimasokoneza magetsi pogwiritsa ntchito makina pamene magetsi kapena magetsi ambiri achitika. Iyi ndi sitepe yomaliza yotetezera chipangizo ku magetsi ambiri.
Mfundo Yogwira Ntchito ya Overvoltage Protection System
Dongosolo loteteza mphamvu zamagetsi zomwe zili mu charger limagwira ntchito pozindikira kukwera kwa mphamvu zamagetsi ndikuyendetsa kapena kusokoneza mphamvu zamagetsi kuti zisawonongeke pa chipangizocho. Nazi njira zonse zomwe makina otetezera awa amagwirira ntchito:
1. Kuzindikira Kuthamanga Kwambiri:
Dongosolo loteteza liyenera kuzindikira kupitirira kwa mphamvu yamagetsi mkati mwa nthawi yochepa kwambiri. Zigawo monga varistors ndi Zener diodes zimachitapo kanthu nthawi yomweyo kusintha kwa mphamvu yamagetsi.
2. Kugawa Kwambiri kwa Mphamvu:
Akazindikira, mphamvu yochulukirapo imasinthidwa kudzera munjira yotetezeka. Ma MOV ndi ma GDT nthawi zambiri amayendetsa mphamvuyo pansi kuti atsimikizire kuti mphamvu yamagetsi isafike pamagetsi oyambira a charger.
3. Kupuma kwa Pakadali Pano:
Ngati magetsi akukwera kwambiri, chotsegula magetsi kapena polyswitch chimagwira ntchito yosokoneza magetsi onse. Izi zimatsimikizira chitetezo cha chipangizocho komanso cha wogwiritsa ntchito.
4. Kubwezeretsa Zinthu Zachizolowezi:
Mphamvu yamagetsi ikatha ndipo mphamvu yamagetsi ikabwerera pamlingo wabwinobwino, zinthu zina monga chopalira magetsi zitha kubwezeretsedwanso kapena polyswitch ikhoza kubwerera pamlingo wotsika, zomwe zimathandiza kuti chochaja chizigwira ntchito ngati kale.
Kukhazikitsa mu Kapangidwe ka Charger
Kuti akhazikitse njira yotetezera mphamvu zamagetsi pakupanga chojambulira, mainjiniya wa zamagetsi ayenera kuchita zinthu zingapo:
1. Kusankha Zigawo:
Kusankha zigawo zoyenera kutengera zomwe zafotokozedwa komanso zosowa. Mwachitsanzo, kudziwa kuchuluka kwa MOV koyenera kutengera mphamvu yamagetsi ndi mphamvu ya chaja.
2. Kapangidwe kabwino ka Circuit:
Dera loteteza mphamvu zamagetsi ochulukirapo liyenera kupangidwa kuti likhale lothandiza komanso losasokoneza magwiridwe antchito a chaja. Izi zikuphatikizapo kudziwa njira ya mphamvu zamagetsi ochulukirapo ndi chosokoneza magetsi.
3. Kuyesa ndi Kutsimikizira:
Pambuyo pokonza, ndikofunikira kuchita mayeso olimba pa chojambulira kuti zitsimikizire kuti njira yotetezera ikuyenda bwino pamikhalidwe yosiyanasiyana, kukwera kwa magetsi kwakanthawi kochepa komanso kwa nthawi yayitali.
4. Miyezo ya Chitsimikizo ndi Chitetezo:
Onetsetsani kuti chojambulira ndi makina ake otetezera zikutsatira miyezo yoyenera yachitetezo, monga UL, CE, kapena IEC. Miyezo imeneyi imayang'anira mbali zachitetezo cha zipangizo zamagetsi, kuphatikizapo chitetezo cha overvoltage.
Mapeto
Kuchuluka kwa mphamvu zamagetsi ndi chiwopsezo chachikulu pa zipangizo zamagetsi, makamaka ma charger, omwe ndi zigawo zofunika kwambiri pa zipangizo zambiri zama digito. Pogwiritsa ntchito njira yoyenera yotetezera mphamvu zamagetsi, chiopsezo cha kuwonongeka kwa chipangizo ndi zoopsa zomwe zingachitike chingachepe. Zigawo monga varistors, Zener diodes, polyswitches, machubu otulutsa mpweya, ndi ma circuit breakers zimagwira ntchito yofunika kwambiri pozindikira, kulumikiza, ndikusokoneza mphamvu zamagetsi zochulukirapo.
Kapangidwe kake mosamala, kusankha zigawo, ndi kuyesa ndizofunikira kwambiri pakugwira bwino ntchito kwa makina otetezera. Kuphatikiza apo, kutsatira miyezo yoyenera yachitetezo kumaonetsetsa kuti zipangizo sizimangokhala zotetezeka komanso zodalirika pamsika. Chifukwa chake, kukhazikitsa njira yotetezera mphamvu zamagetsi sikuti ndi chisankho chaukadaulo chokha komanso ndi udindo woteteza ndi kukhazikika kwa zida zamagetsi ndi ogwiritsa ntchito ake.
