i want to try this formula by rebotexx but im wondering where does 5.775 came from..
for me this is a simplified example...
Example: Core Size = 1 ¼ X ¾
Formula 1:
Convert first into decimal:
thickness X center tapped = Core Area
1.25 X .75 = 0.9375 (Core Area)
Formula 2:
Compute power watts:
Power=Core Area (5.58 ) 2
0.9375 (5.58 ) =(5.23125) 2
Power =27.365977 Watts
Formula 3:
Compute number of turns:
Turn / Volts = 5.775 / Core Area
5.775 / 0.9375 = 6.16 Turn over volts
Primary winding:
6.16 X 220 Volts = 1,355 Turns
Secondary winding:
6.16 X 6 Volts = 37 + 37 turns for full wave design
6.16 X 6 volts = 37 turns for haft ware design
Formula 4:
Compute for Primary & Secondary Current:
Current = Power / Volts (I= P/V)
For primary current:
I = 27.365977 / 220 Volts = 0.124308 Amp.
For secondary current:
I = 27.365977 / 6 Volts = 4.5609962 Amp. For haft wave design
I = 27.365977 / 6 Volts = 4.5609962 / 2 = 2.2804981 Amp. For full wave design
Formula 5:
Compute for Circular Miles AWG:
Current X 680 or 700 recommended 680 for normal heat
For primary winding:
0.124308 (680) = 84.59 Cir. Mil.
AWG # = 31
(Please refer the nearest value to AWG standard table)
For secondary winding:
2.2804981 (680) = 1551 Cir. Mil.
AWG # = 18
(Please refer the nearest value to AWG standard table)
You have now designed:
220 volts primary
6 volts full wave secondary
2 Amps.
27 Watts