Zener - He aha kēia mea a ka mea ia no?

Zener - diode mea he mea uholo uila me ka hanana waiwai. Inā he maʻamau mea uholo uila i ka wa a ka mea nana e hoole inclusion mea he insulator, e hanaʻia kēia hana a hiki i ka kekahi ulu o ka noi anakahi uila, i kau ai reversible avalanche hālāwai hope ia lŘlŘ. Me ka hou mahuahua ma ka pele ma ka zener diode aʻe anakahi uila koe a eia no i ka hapaʻauhau emi ana o ke ea. Ma keia aoao hiki e kū ai i ka noaaeeecaoee? Aaeei.

I ka paʻa, i ka zener mua ae he uukuʻikena kulu. Hehee ai hoi me he mea pale mū holapū kona ia'ku waiwai mea nui. Ma ka hālāwai hope o ka zener ia'ku i negligible. Inā hou hoʻomau e hoala mai i ka hoʻokomo o anakahi uila, ka hehee ai hoʻomaka e mahana mai a me ka wā o ka pono aku i ke ana waiwai o ka irreversible thermal uhu. Inā ka mea, ua i lawe mai ia mea, he loli o ke anakahi uila mai Aʻohe hiki i ka kee na palena o ka zener workspace ka waiwai i hoopaa mai.

Ka wā 'ana ua hō'ā zener diode ano mai i oko mai o ka diode. I ka wa i pili i ka P-hua hoʻohui māhele 'āina a me ka hua - i N-māhele o ka hoʻololi ia'ku mea uuku, a me kaʻikena kahe ana ma ia uku ole ia. He kūpono me ka hoʻokomo o anakahi uila.

Zener - he kūikawā diode, pili ka hapanui ia ma ka hope. First hehee ai i loko o ka paʻa moku'āina. I ka ka uila hālāwai hope zener anakahi uila ua mālama a eia i loko o ka nuiʻikena huahelu.

Ua lako i ka anode hopena maikaʻi, a me ka cathode - eia kekahi. Ma kela aoao o noaaeeecaoee (wahi 2 ma lalo nei), a me ka overheat maoli ka pahiki o ka halepaahao ole.

ano o ka

zener diode kiko'î e like penei:

• U _V - noaaeeecaoee anakahi uila ma ka palena ikiʻikena I _V;
• _Paukū au _Min - palena iki hālāwai hope uilaʻikena Ka hoʻomaka 'ana;
• I _{ST max} - ka i kā mākou anaʻikena;
• TKN - ana wela kaʻi lau waiwai.

E like me kaʻike mau diode, ka zener diode - he mea uholo uila manaʻo, ma a ka he-anakahi uila ano o ke kahua o nā pou a me ka thermal hālāwai hope e ke aupuni 'loihi lawa mai kekahi i kekahi.

Me ka i kā mākou allowable pono o na nā mea kiko'î, pinepineʻia ma ka papa - mana dissipation:

P _max = I _max ∙ U _{V v.}

Kaukaʻi ma ka mahana o ka hana o ka zener diode i e ka TKN maikaʻi 'ole io. Ke sequential pilina nā kumumea me kekahi mau hoailona no na coefficients i waho e neʻe zener i ke kaumaha ma muli hahana maoli nō kēia a me ka huʻihuʻiʻana.

o ka huakai kaapuni

A typical kiʻikuhi o ka poe noonoo ole stabilizer, haku o ka ballast ia'ku R _b. A me ka zener diode shunt haawe ana.

Ma kekahi mau hihia, he mea iʻaihue o noaaeeecaoee.

1. Stabilizer infeed nui anakahi uila mai ka mana kahi i loko o ke alo o ka auoiaea Kānana mea pihana. Inrush au i kauoha aku la i ka wā hiki i hoʻokō 'ole' ana o ka zener diode a me ka make ana o ka mea pale mū holapū R _b.
2. e haawe hookahe ana. I ka pili i ka mea i kā mākou hoʻokomo o anakahi uila o ka zener diode pono i oi aku i ka allowable e alakai ai i kona luku a me ka paio hahana maoli nō. He nui, e like me ka palapala holo'āina'ē palekana pae'ōnaehana wahi.
3. Ke ia'ku R _b. Ua wae liʻiliʻi, no laila, e ma ka lalo hiki cia o ka kokuaia anakahi uila, a me ka i kā mākou allowable haawe pono i ka zener diode mea i loko o ka hana hooponopono ciia.

E hoʻopale ai i ka stabilizer hoʻohana thyristor ka hoomalu ana i puhi ai paha fuses.

Mea pale mū holapū R _b. He pōpilikia ma ka haʻilula:

R _b. = (U _lua - U _SG) (I _V + au _N).

Zenerʻikena I _V ua wae ma waena oʻoluʻolu i kā mākou a me ka palena iki nā loina, ke kaumaha ma muli o ka hoʻokomo o anakahi uila U _lua a me ka haaweʻikena I _n.

Ke koho ana o zener

Na kumu mua i ka nui oko i loko o ke anakahi uila noaaeeecaoee. E kiʻi i ka pololei waiwai o U _n, e koho Zener diodes, mai ka ia'ōhui. Aia mau ano me ka puali huahelu o kiko'î. At kiʻekiʻe mana dissipation hehee wale lele aku ma luna o radiators.

pono hoʻokomo oʻikepili no ka i ka ho omaulia ana o kiko'î o ka zener diode, no kekahi laʻana, like penei:

• U _NUM = 12-15 - hoʻokomo o anakahi uila;
• U _V = 9 - stabilized anakahi uila;
• R _N = 50-100 Ma - haawe ana.

Kiko'î ano o nā mea me ka haʻahaʻa mana hokii.

No ka palena iki hoʻokomo o anakahi uila o 12 V, i ka pono ma ka mea i kā mākou e haawe ua wae mai - 100 MA. E like me ke Ohm ka kānāwai hiki ke loaʻa i ka huina kaumaha o ke kaula:

R _Σ = 12 V / 0,1 A = 120 ohms.

Zener anakahi uila kulu ka 9 V. Ma kala pono o 0,1 A mhihi haawe nei:

R _eq = 9 V / 0,1 A = 90 ohms.

Ano ia mea hiki e hooholo i ka ia'ku o ka ballast:

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

Ua Ua koho 'ia mai ka maʻamau huahelu kahi o ka waiwai coincides me ka pōpilikia nui.

ʻO kā mākou pono ma ka zener diode ua nānā 'ia e lawe i ka mooolelo o ka haawe disconnection, i ka mea mea ole mai o ka mea, ina kekahi unsolder uea. Ke anakahi uila e like ma ka mea pale mū holapū e e:

U _R = 15 - 9 = 6 V.

Next, i ka pono ma mea pale mū holapū:

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

Mai ka zener diode ua pili i ka moʻo ia mea, au _C = au _R = 0,2 A.

mana dissipation e ia P = 0,2 ∙ 9 = 1.8 watts.

E like me ka loaa kiko'î koho he kupono zener D815V.

symmetrical zener

A diac mea he ka hoʻololiʻana mea, he lawelawe alternatingʻikena. A hiʻona o kana hana mea e papa i ke anakahi uila i kekahi volts ka wā i komo i loko o ka laulā o 30-50 V. Ua hiki auou caiaiai ia e mau oppositelyʻike mau zener komo pū. I na mea maalea, ua hoʻohana 'ia me ka hoʻololiʻana hehee wale.

mea like zener

Ka wā e hiki ole loaʻa ka hehee ai kupono, hoʻohana i ka analogy o ka zener diode transistors. Lākou ka pono i ka manawa kūpono o ke anakahi uila hooponopono. Kēia hiki pili DC amplifiers me ka mau kahua o ka hoʻonaʻauao.

Ma ka hoʻokomo o anakahi uila mahele waiwai, e hookupaa i ka koli iho la i mea pale mū holapū R1. Inā ka hoʻokomo o anakahi uila maoli, ma ke kumu o ka pākali hoʻolele VT1 ua no hoi e māhuahua. Kēia maoli i ka pono ma ka pākali hoʻolele VT2, i compensates no ke anakahi uila māhuahua, ma ia malama ana kona hale lio auaiaea.

omaka Zener

Available ma ka aniani zener diodes a me Zener diodes i loko o ke ea hale noho. Ma ka hihia mua ka mea, e pili ana ma na kii 2, ma waena o i ka palapala V. Title 9V1 Hōʻike i U _V = 9,1 V.

Ma ka ea neo? Aaiiai? Palapalaia maluna penei i deciphered hoʻohana 'ana i ka datasheet, hiki i kahi e loaʻa'ē aʻe nā koho.

Dark ke komo lima ma luna o ke kino hōʻike ma ka cathode, e a ua pili i ka hoʻohui.

ka hopena

Zener - diode ia me ka kūikawā waiwai. Ke ka pono i ke kiʻekiʻe Zener anakahi uila rula ma luna o ka ākea hana huahelu o kaʻikena oko, e like me na mea pilina noaia. E stabilize ka haʻahaʻa anakahi uila maalea loaʻa i ka mua, hema, a me ka mea, hoʻomaka e hana like maʻamau diodes.