Kodi aChojambulira cha Snubber?

Mu machitidwe amagetsi ndi zamagetsi amakono, zida zosinthira monga ma transistors, thyristors (SCR), ma IGBT, ndi ma relay zimagwira ntchito yofunika kwambiri. Komabe, zida izi nthawi zambiri zimakumana ndi kukwera kwa magetsi komanso kusintha kwadzidzidzi kwamagetsi chifukwa cha katundu woyambitsa, zomwe zingayambitse kuwonongeka, kusowa ntchito, komanso kusokonezeka kwa ma electromagnetic (EMI) kosafunikira. Apa ndi pomwema capacitor osakhala ndi mphamvubwerani mu ntchito.

Kumvetsetsa Snubber Capacitors

A capacitor yochepetsera fungondi capacitor yapadera yomwe imagwiritsidwa ntchito m'mabwalo osungira magetsi kuti iteteze zida zosinthira ku ma voltage spikes ndi ma transient currents. Mwa kupereka njira ina yakanthawi yamagetsi, ma snubber capacitors amathandiza kuchepetsa kupsinjika kwa zigawo zosinthira magetsi, kuwonjezera nthawi yawo yogwira ntchito, komanso kukonza kudalirika kwa mabwalo.

Nchifukwa chiyani ma Snubber Circuits amafunikira?

Mabwalo odulira zinthu zakale amagwiritsidwa ntchito m'njira zosiyanasiyana, kuphatikizapo:

• Mabwalo operekera magetsi- kuchepetsa kukwera kwa magetsi.
• Mabwalo olumikizirana ndi olumikizirana- kuchepetsa kupangika kwa arc pakati pa ma contacts.
• Ma switch a semiconductor (SCR, IGBT, GTO, ndi zina zotero)- kuchepetsa kukwera kwa magetsi (dV/dt) ndi kukwera kwa magetsi (di/dt), kupewa kuyambitsa zinthu zabodza komanso kulephera kwa chipangizo.

Kodi Ma Circuits a Snubber Amagwira Ntchito Bwanji?

Ma circuits a Snubber nthawi zambiri amakhala ndi capacitor kapenanetiweki yolimbana ndi capacitor (RC)imayikidwa pa chipangizo chosinthira.

• Kuchepetsa Mphamvu ya Voltage:Pamene SCR kapena transistor yazimitsa, mphamvu yopangira mphamvu imapanga mphamvu yamagetsi yokwera kwambiri. Kachipangizo kochepetsera mphamvu kamatenga mphamvu imeneyi, kuteteza mphamvu yamagetsi yochuluka.
• Kulamulira kwa dV/dt:Capacitor imachepetsa kukwera kwa mphamvu yamagetsi pa switch, kupewa kuyatsa kosayembekezereka (kuyambitsa zabodza) mu thyristors ndi ma semiconductor ena.
• Kulamulira kwa di/dt:Kuwonjezera choletsa motsatizana ndi capacitor kumachepetsa mphamvu yolowera pamene switch ikuyaka, zomwe zimaletsa kupsinjika kwakukulu pa gawolo.

Makhalidwe Ofunika a Snubber Capacitors

Ma capacitor a Snubber adapangidwa kuti azigwira ntchito yoyendetsa mafunde amphamvu komanso ma pulse obwerezabwereza. Makhalidwe awo ofunikira ndi awa:

• Ma frequency ogwiritsira ntchito ovomerezeka kwambiri (100 kHz kapena kuposerapo).
• Kudzitenthetsa kochepa komanso kutayika kochepa.
• Kukana kofanana kotsika (ESR) kuti mphamvu igwire bwino ntchito.
• Mphamvu yamagetsi ndi mphamvu zambiri zogwirira ntchito zonyamula katundu wosakhalitsa.

Mitundu ya Snubber Capacitors

Ma capacitor a Snubber amabwera m'mitundu yosiyanasiyana kutengera kuchuluka kwa mphamvu ndi zofunikira pakugwiritsa ntchito:

• Ma Capacitors a Ceramic- Yoyenera kugwiritsa ntchito mphamvu zochepa.
• Ma Capacitors a Mafilimu a Pulasitiki- Amagwiritsidwa ntchito m'mabwalo amphamvu kwambiri, kuphatikizapo makina amagetsi (EV) ndi zowongolera zamagalimoto.
• Ma Capacitors a Polypropylene (MPP) Opangidwa ndi Metalized- Yopangidwira ntchito zama frequency apamwamba komanso amphamvu kwambiri komanso inductance yochepa.

Kusankha Chojambulira Choyenera cha Snubber

Kusankhidwa kwa capacitor ya snubber kumadalira zinthu monga:

• Mtengo wa mphamvu:Kawirikawiri zimayambira pa0.1µF mpaka 10µF, kutengera chipangizo chosinthira ndi kulowetsa katundu.
• Kuyesa kwa voteji:Iyenera kukhala yokwera kuposa mphamvu yamagetsi ya dera.
• ESR ndi mlingo wamakono:Iyenera kukhala yotsika mokwanira kuti igwire mafunde othamanga popanda kutentha kwambiri.

Kodi Ma Capacitor a Snubber Amagwiritsidwa Ntchito Kuti?

Ma capacitor a Snubber amapezeka m'mafakitale ndi ntchito zosiyanasiyana, monga:

• Magawo operekera magetsi (PSU)
• Magalimoto amagetsi (ma EV) ndi ma circuit owongolera magalimoto
• Machitidwe odzichitira okha mafakitale
• Makina amphamvu obwezerezedwanso (ma inverters a dzuwa, ma turbine a mphepo)

Mapeto

Ma capacitor a Snubber amagwira ntchito yofunika kwambiri poteteza zipangizo zosinthira ku ma voltage spikes, kuwongolera ma transient current currents, ndikuwonjezera magwiridwe antchito a circuit yonse. Pamene magetsi amagetsi akupitilira kupita patsogolo, kufunikira kwa ma snubber capacitor ogwira ntchito bwino komanso odalirika kudzapitirira kukula. Kaya ndi magetsi, ma automation amafakitale, kapena magalimoto amagetsi, ma capacitor awa amathandiza kuonetsetsa kuti ntchito ikuyenda bwino komanso yokhazikika m'ma circuit amphamvu kwambiri.