transformer rewinding

[bonjing]

i salute you MraI.... well done.. thank you

 

[MrAl]

Hi again,


Oh that's ok, you are welcome.

BTW, you might also want to look up Faraday's Law, as that is where that
equation comes from.

 

[pixnum]

Can you give any website or book resources link ?

 

[aliksr]

230 volt Ac primery volt and secondary 12 volt Dc

Dear Sir,

Hope you will be fine,

please help me for this please I want to make 1000 watt inveter transformer and plus it charge the 145 am battery.

Thanking you

aliksr

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

 

[marvz]

hello there,

what are you trying to do?

1000VA at 230v primary. 12v secondary to charge a 145amp. bat?