how to design a power supply?

[hossam mahanna]

Hi every body...

In my faculty, we are interested in doing some projects,any project we do must want power supply with different output values...please, iwant to know
a simple method to design a suitable power supply.

thank u

 

[RODALCO]

Powersupply

Hossam,

Well, first you need to know what rating you require and for what purpose.
AC,or DC output
100 VA, 500 VA, 2 kVA ?
Primary mains voltage 110 / 220 Volts, secondary voltages 12 , 32 Volts etc.
Then you need to know what type of loads you put on it or just use it as a dc bench top supply with adjustable voltage and current.
A range 0 - 24 Volts dc with currents up to 3 amps is very versatile.

The basic layout is in general MAINS, isolator switch, fuse, transformer primary.
from secondary through bridge rectifier , inductor, capacitor, to series regulating transistor 2 N3055 or whatever.
driver cct and (overload foldback system) if required.
Have a look on google for linear power supplies and there will be some examples.
I can attach a schema but it will take some time because i have to put it through flickr.


Good luck and keep us posted how you go.

For a benchtop supply you can also look in surplus shops for a secondhand one

 

[troubleshooter]

ya that is ok.but could any body tell how to select the value of ripple capacitor. i know more the value of cap,less is ripple.see there are formulae but they involve current and ripple voltage. but how to calculate or measure that how much ripple we r getting .or is this value is to be assumed .

2.) also when we connect the cap is it not going to change the current value

 

[Aily Sajjad]

Hi,

https://electronics-tutorials.com/basics/power-supply.htm

The stuff at the link can help you.

Aily

***If you have started - Its done***

 

[hossam mahanna]

thanks RODALCO for helping me ... & thank u every body...

have agood time

 

[Ayne]

Hi every body...

In my faculty, we are interested in doing some projects,any project we do must want power supply with different output values...please, iwant to know
a simple method to design a suitable power supply.

thank u

Power Supply

Make it's PCB and it is ready for u.