Zener - abin da yake da wannan da kuma abin da yake da shi ga?

Zener - diode ne semiconductor tare da musamman Properties. Idan wani talakawa semiconductor lokacin da baya da hada ne da wani insulator, shi aikin wannan aiki har a wani ci gaban da amfani ƙarfin lantarki, sa'ilin reversible ambaliyar ruwa fashewa faruwa. Tare da kara karuwa a kwarara ta cikin zener diode baya ƙarfin lantarki rage m saboda da kunnen doki da rage daga cikin juriya. A wannan hanyar zai yiwu a cimma karfafawa yanayin.

Lokacin da rufe, da zener farko wuce a kananan halin yanzu yayyo. Sinadarin behaves a matsayin resistor wanda juriya darajar ne manyan. A fashewa da zener juriya zama negligible. Idan kara ci gaba da tada shigar da ƙarfin lantarki, da kashi fara dumama da kuma lokacin da na yanzu ya wuce halatta darajar da komowar thermal runaway. Idan ba a kawo shi, wani canji na ƙarfin lantarki daga sifili zuwa sama da iyaka na zener filin aiki Properties aka kiyaye shi.

Lokacin kai tsaye switched zener diode halaye ba su bambanta ba daga diode. Idan aka haɗa zuwa p-da yankin da kuma debe - to n-yankin na mika mulki juriya ne kananan da kuma na yanzu gudana ta hanyar da shi da yardar kaina. Ya ƙara da shigar da irin ƙarfin lantarki.

Zener - musamman diode, da alaka da mafi yawa na baya. Da farko kashi ne a cikin rufaffiyar jihar. Lokacin da wani lantarki fashewa zener ƙarfin lantarki da aka kiyaye m a babban yanzu kewayo.

Aka kawota ga anode korau da cathode - da. Beyond karfafawa (aya 2 da ke ƙasa) da kuma overheat qara Yiwuwar cell gazawar.

halaye na

zener diode sigogi kamar haka:

• U _v - karfafawa irin ƙarfin lantarki a maras muhimmanci halin yanzu ina _v.
• _Mataki na _min - m fashewa da wutar lantarki yanzu yana farawa;
• Na _{st max} - matsakaicin halatta halin yanzu.
• TKN - zazzabi coefficient.

Ba kamar na al'ada diode, da zener diode - a semiconductor na'ura, a cikin abin da na yanzu-ƙarfin lantarki halayyar da filin na lantarki da thermal fashewa suna located nisa isasshen daga juna.

Tare da wani matsakaicin canja halin yanzu na related sigogi, sau da yawa ba a cikin alluna - ikon masha'a:

P _max = I _max ∙ U _{v v.}

Dogara a kan zafin jiki na aiki na zener diode iya zama TKN tabbatacce ko korau. The bi da bi dangane abubuwa daban-daban tare ãyõyi ga coefficients ne ainihin zener ba dangane da dumama ko sanyaya.

na kewaye

A hankula zane na wani sauki stabilizer, hada da wani ballast juriya R _b da kuma zener diode shunt load.

A wasu lokuta, akwai wani ƙeta na karfafawa.

1. Stabilizer infeed manyan ƙarfin lantarki daga ikon source a gaban fitarwa tace capacitor. Inrush yanzu idan ana caji zai iya sa maye da zener diode ko halakar da resistor R _b.
2. load zubar. A lokacin da shafi matsakaicin shigar da ƙarfin lantarki na zener diode halin yanzu iya ƙetare canja da kai ga ta hallaka da kuma dumama. Yana da muhimmanci a bi da fasfo hadari aiki yanki.
3. A juriya R _b aka zaba kananan, saboda haka cewa a magangara mafi ƙasƙanci yiwu darajar da wadata da irin ƙarfin lantarki da kuma matsakaicin canja kaya halin yanzu ga zener diode ne a aiki tsari zone.

Don kare stabilizer amfani thyristor kariya haihuwarka ko fis din.

Resistor R _b aka lasafta ta da dabara:

R _b = (U _rami - U _SG) (I _v + I _n).

Zener halin yanzu ina _v aka zaba tsakanin m iyakar da mafi ƙarancin dabi'u, dangane da shigar da ƙarfin lantarki U _rami da kaya halin yanzu ina _n.

A zabi na zener

The abubuwa da babban bambancin da irin ƙarfin lantarki karfafawa. Don samun wani cikakken darajar U _n, Zener diodes aka zaba daga cikin wannan tsari. Akwai iri tare da kunkuntar kewayon sigogi. A high ikon masha'a abubuwa saka a kan radiators.

dole shigar data ga lissafi na sigogi na zener diode, misali, kamar haka:

• U _NUM = 12-15 - shigar da irin ƙarfin lantarki.
• U _v = 9 - stabilized ƙarfin lantarki.
• R _n = 50-100 MA - load.

Sigogi halayyar na'urori tare da low ikon amfani.

Ga wani m shigar da ƙarfin lantarki na 12 V, yanzu a kalla kaya da aka zaba - 100 MA. A cewar Ohm ta dokar za a iya samu a total nauyi na sarkar:

R _Σ = 12 V / 0.1 A = 120 ohms.

Zener ƙarfin lantarki drop ne 9 V. A halin yanzu 0.1 A gunki kaya ne:

R _Eq = 9 V / 0.1 A = 90 ohms.

Yanzu yana yiwuwa domin sanin da juriya na ballast:

R _B = 120 ohms - 90 ohms = 30 ohms.

An zabi daga wani misali iyaka inda darajar daidai da lasafta darajar.

Matsakaicin halin yanzu ta hanyar da zener diode ne m da shan la'akari da kaya cire hašin, cewa shi ne, ba daga oda, idan wani unsolder waya. A irin ƙarfin lantarki drop fadin resistor zai kasance:

U _R = 15 - 9 = 6 V.

Next, yanzu ta hanyar resistor:

Na _R = 6/30 = 0,2 A.

Tun da zener diode an haɗa a jerin to shi, na _C = I _R = 0,2 A.

ikon masha'a zai zama P = 0,2 ∙ 9 = 1.8 watts.

Bisa ga samu sigogi zaba ta dace zener D815V.

tsakaitã zener

A diac ne sharuddan sauyawa na'urar, mai conductive alternating halin yanzu. A siffa daga aikinsa ne to jifa da irin ƙarfin lantarki zuwa dama volts lokacin da kunshe a cikin kewayon 30-50 V. Yana za a iya maye gurbinsu da biyu oppositely al'ada zener hada. Na'urorin da ake amfani da sauya sheka abubuwa.

analogue zener

Lokacin da ba za ka iya samun dace da rabi, yana amfani da misalin wani zener diode transistors. Su amfani ne da yiwuwar ƙarfin lantarki tsari. Wannan zai iya amfani DC amplifiers da mahara, saukarwa.

A shigar da ƙarfin lantarki divider tsayar da trimming resistor R1. Idan shigar da ƙarfin lantarki qara, a kan tushen da transistor VT1 ne ma kara. Wannan qara halin yanzu ta hanyar da transistor VT2, wanda Rama ga ƙarfin lantarki karuwa, game da shi, rike da barga fitarwa.

alama Zener

Samuwa a gilashin zener diodes da Zener diodes a wani roba gidaje. A cikin farko idan sun ake amfani a kan Figures 2, tsakanin wanda harafin V. Title 9V1 nuna cewa U _v = 9,1 V.

A kan roba gidaje inscriptions ake deciphered amfani da datasheet, inda za ka iya samun wasu zaɓuɓɓukan.

Dark zobe a jiki nuna ta cathode, to wanda aka haɗa wani da.

ƙarshe

Zener - diode shi da musamman Properties. A amfani ne babban Zener ƙarfin lantarki tsari a kan wani m aiki kewayon halin yanzu bambancin, kazalika da sauki dangane makirci. Don dattako da low irin ƙarfin lantarki na'urorin sun hada da wani a gaba shugabanci, kuma su fara aiki a matsayin al'ada diodes.