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Proiect de transformator





3 
Tensiunile nominale de linie  EMBED Equation.3 
Schema si grupa de conexiuni  EMBED Equation.3 
Tensiunea de scurtcircuit  EMBED Equation.3 
Pierderile la mers in gol  EMBED Equation.3 
Pierderile in infasurari  EMBED Equation.3 
Curentul la functionarea in gol  EMBED Equation.3 
Infasurarile sunt realizate din aluminiu

2. Tratarea proiectului

2.1 Inalta – conexiune Y
 EMBED Equation.3 
 EMBED Equation.3 
 EMBED Equation.3 
Joasa – conexiune Y
 EMBED Equation.3 
 EMBED Equation.3 
 EMBED Equation.3 

 EMBED Equation.3 
 EMBED Equation.3  - puterea nominala pe faza, trasferata de reteaua primara in circuitul secundar

2.2 – Diametrul coloanei
 EMBED Equation.3 = EMBED Equation.3  EMBED Equation.3 
Alegem diametrul coloanei  EMBED Equation.3 
- Aria coloanei
 EMBED Equation.3 
 EMBED Equation.3 
 EMBED Equation.3 
 EMBED Equation.3 
 EMBED Equation.3 


Inaltimea coloanei
Pentru Sn=63kVA iau:
 EMBED Equation.3 
Inaltimea bobinei
 EMBED Equation.3 

2.3 Numarul de spire
 EMBED Equation.3   EMBED Equation.3   EMBED Equation.3 

 EMBED Equation.3 
 EMBED Equation.3 
wi=1710+10%=1795.5 iau wi=1800spire

Sectiunile conductoarelor
 EMBED Equation.3 
 EMBED Equation.3 
 EMBED Equation.3 

Proiectarea bobinajelor


Bobinajul pe joasa tensiune
Iau conductor de  EMBED Equation.3  cu izolatie  EMBED Equation.3 





Aranjarea spirelor pe inaltimea  EMBED Equation.3 
 EMBED Equation.3 
 EMBED Equation.3 
Solutie adoptata-iau 2 straturi complete a 35 spire.
35spire EMBED Equation.3 10mm=350mm, cu joc iau 360mm
 EMBED Equation. 3 , cu joc iau aj=15mm



Bobinajul de inalta tensiune
 EMBED Equation.3 
Aranjarea spirelor pe inaltimea  EMBED Equation.3 
 EMBED Equation.3 
 EMBED Equation.3 
 EMBED Equation.3 
 EMBED Equation.3 
 EMBED Equation.3 
 EMBED Equation.3 
 EMBED Equation.3 

Dispunerea bobinelor



























2.7 Determinarea preliminara a reactantei inductive de scapari
 EMBED Equation.3  EMBED Equation.3 
 EMBED Equation.3 
2.7.1 Determinarea caderii de tensiune reactiva
 EMBED Equation.3 
2.7.2 Determinarea caderii de tensiune activa si reactiva in %
 EMBED Equation.3 
 EMBED Equation.3 
Verificare:
 EMBED Equation.3 %
uk impus este de 4%, eroarea este de +2%, sub  EMBED Equation.3 10% admis de STAS.

2.8 Corectarea - nu este cazul.


2.9 Calculul rezistentelor infasurarilor si a pierderilor in infasurari

 EMBED Equation.3 
 EMBED Equation.3 
 EMBED Equation.3 
 EMBED Equation.3 
 EMBED Equation.3 
 EMBED Equation.3 

In datele de proiectare am Pk=1350W si eu am obtinut Pt=1245.86W, adica -7.7%, sub  EMBED Equation.3 10% admis de STAS.


2.l0 Construirea triunghiului de scurtcircuit


 EMBED Equation.3 

 EMBED Equation.3 









2.11Calculul pierderilor in fier

2.11.1 Greutatea coloanelor
 EMBED Equation.3 
 EMBED Equation.3 

2.11.2 Pierderi in coloane
 EMBED Equation.3 

2.11.3 Greutatea jugurilor

aii=30mm
x=aj+ai+aij
 EMBED Equation.





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