Qabtaan xisaabinta transformer

Qorshahaa waxa of a transformer caadiga fudud. Waxay ka kooban tahay core bir ah, laba gariiradda la silig loogu fuuli jiray. Mid ka mid ah gariiradda yeedhay aasaasiga ah, labaad - sare. muuqaalka kore ee danab ku AC (U1) iyo hadda (I1) ee foomka ugu horeysay gariiradda in ay muhiimka ah dheecaan magnetic. Waxay abuurtaa EMF si toos ah in gariiradda sare, taas oo aan la lifaaqan silsiladda, oo uu leeyahay ciidanka tamarta, loo siman yahay eber.

Haddii circuit waa xiran iyo isticmaalka dhacaa, waxay u horseeddaa kordhay saami xoogga hadda in gariiradda ugu horeysay. Tani model of xiriirka ka dhexeeya windings ku sharxayaa habka of Isbadal iyo qeybiyey ee tamarta korontada, kaas oo la mid ah xisaabinta ee gudbiyeyaasha. Tan oo dhan gariiradda of gariiradda labaad ku xiran yihiin ee taxanahan, laga heli by saamaynta wadareed ee emf ku cad on darafyadiisa qalabka.

Gudbiyeyaasha ururin si dhibicda danab in gariiradda labaad waa jajab yar (2 - 5%), taas oo u saamaxaaya in ay qaadan male ah sinnaanta on tilmaamayaasha ay darafyadiisa U2 iyo EMF. Number of U2 noqon doonaa more / ka yar si, sida weyn waa faraqa u dhexeeya tirada markooda ka mid ah labada gariiradda - N2 iyo N1.

Xidhiidhka ka dhexeeya tirada layers silig waxaa loo yaqaan ratio Isbadal. Waxaa lagu qeexay formula (iyo muujinaysaa by warqadda K), kuwaas oo: K = N1 / N2 = U1 / U2 = I2 / I1. Inta badan tiradaasi u eg cabirku yahay laba abyoonayaasha, tusaale ahaan 1:45, taas oo muujinaysa in tirada dadka markooda ka mid ah gariiradda 45 jeer ka yar tiradaasi kale. saamiga Tani waxay ka caawisaa si ay u qabtaan xisaabinta transformer hadda.

diirkja korontada soo saaro laba nooc: W-qaabeeya, iyo hub, ka daadanayo jahaysteen magnetic laba qaybood, iyo-U qaab - la-soociddiisa lahayn. Si loo yareeyo khasaaraha laga yaabo in ushii saaray ma tahay mid joogto ah, laakiin ka kooban yahay layers khafiif ah shaqsi ka go'doonsan yihiin midba midka kale by warqad. Nooca cylindrical ugu badan, jir ayaa la superimposed on hoose loogu fuuli jiray, Jaha kubadaha warqad dheeraad ah, iyo on top of this lakabka sare oo dhan oo kafantii ku silig.

Xisaabinta transformer waxay keeni kartaa dhibaatooyin qaar ka mid ah, laakiin naqshadeeye-lover u iman doonaan inay gargaar oo ka mid ah qaaciidooyinka fududeeyay hoos ku siin. Pre loo baahan yahay si loo ogaado heerka danab iyo ciidamada hadda si gaar ah loogu talagalay gariiradda kasta. awood xisaabiyaa mid kasta oo iyaga ka mid: P2 = I2 U2 *; P3 U3 = I3 *; P4 = I4 * U4, halkaas oo P2, P3, P4 - awoodda (W), windings stackable; I2, I3, I4 - xoogga hadda (A); U2, U3, U4 - danab (V).

Si loo go'aamiyo awood guud (P) xisaabinta of transformer waa geli tilmaamayaasha wadarta windings shaqsi, ka dibna ku badiyey by qodob ka mid ah 1.25, taas oo la tixgelinayo khasaaraha: P = 1.25 (P2 + P3 + P4 + ...). Waana mid ka, P qiimaha xisaabi doonaa qaybta cross muhimka ah (in cm²): Q = 1.2 * kor.kv.P

Markaas socota nidaamka ah go'aaminta n0 tirada markooda halkii 1 volt ah by formula ah: n0 = 50 / Q. Sidaas darteed, aad u ogaato tirada markooda ee gariiradda ah. Waayo, markii hore, iyada oo la tixgelinayo dhibicda ugu danab ee transformer ah, waxa ay noqon doontaa si siman u: N1 = 0,97 * U1 * n0
Ugu dambaysta, N2 = 1.3 * U2 * n0; N2 = 1.3 * U3 * n0 ... Dhexroor ee wax windings kaari loo xisaabin karaa sida ay caanaha: d = 0.7 * kor.kv.1 meesha aan - xoojinta hadda (A), d - dhexroor (mm).

Xisaabinta transformer ee kuu ogolaanaya in aad si aad u hesho amperage ah ee sheathe awood u leeyahay; I1 = P / U1. Waxaa weli taarikada size oo aan la garaneyn in xudunta u ah. Si aad u ogaato in loo baahan yahay si ay u xisaabiso aagga fuuli jiray sanduuqa xudunta: SM = 4 (D1 (q) * + D2 N1 (q) * N2 + D3 (q) * N3 + ......), Xaggee SM - aagga (mm square. ), oo dhan windings ee daaqadda, D1, D2, D3 iyo 4 barbarro - Ballaca (mm); N1, N2, N3 iyo N4 - tirada markooda. Isticmaalka caanaha this qeexayaa loogu fuuli jiray, oo dhumucdiisuna waxay ku sinnayn ee silig ningax, qaybtii degan jir ah in Lumen ee suuqa kala xudunta u ah. Sida laga soo xigtay qiimaha helay aagga la doorto saxan size gaar ah meelaynta free of gariiradda in ay suuqa kala. Ugu dambayntii, waxaa lagama maarmaan ah in la ogaado - dhumucda set xudunta u ah (b), kaas oo la helay caanaha: b = (100 * S) / a, halkaas oo a - width ee ahaa wasladdii khafiifka dhexe (ee mm); Q - in laba jibbaaran. Eeg Qaybta ugu adkaa geedi socodka this, -. Si ay u qabtaan xisaabinta transformer ee (element a bar search la size ku haboon).