1. A Working Model Of A Step
Down Transformerrmer
A Working Model Of A Step Down Transformer
By:
Paras Kapoor
EE12B1022
Indian Institute of Technology
Hyderabad
2. Working of An AC/DC Transformer
Requirement of components to make a transformer:
1.Double layer copper magnetic wire.
2.Plates or sheets of silicon-iron.
3.Waxed paper or press board.
4.Brackets and screws.
5.Spool or formwork(plastic).
6. IN5408 diode with 3 amp forward current rating.
Indian Institute of Technology
Hyderabad
3. Calculations Required To Make A Transformer
Calculating the core area of the transformer.
C.A. = side * side of the spool.
Calculating turns per voltage:
TPV = 1000/(4.44*C.A.*flux density*AC frequency).
Standard value of flux density of steel may be taken as
1weber/sq.m .
Primary current = (secondary volt*current)/(primary
volt*efficiency).
Number of turns = TPV*(primary voltage).
Secondary coil number of turns = TPV*1.04*(secondary
voltage).
Also
(primary turns)*(secondary voltage)=(secondary
turns)*(primary voltage).
Indian Institute of Technology
Hyderabad
4. Calculations made by me.
Primary voltage = 228.
C.A.= 5.1*4= 20.4 cm^2.
T.P.V. = 1000/(4.44*50*1*20.4) = 2.2
Primary number of turns =1200 turns.
Secondary number of turns = 230.
Secondary voltage = 44 V.(by calculation).
Indian Institute of Technology
Hyderabad
5. Converting AC to DC
Using diode The IN5408 diode is an ordinary silicon diode. It has a 3 amp
forward current rating, and a 1000 volt peak reverse voltage rating.
Using Four diode in combination.
Machine to make
core windings.
Indian Institute of Technology
Hyderabad