Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

48v 50 amp rectifier to 5v 50 amp conversion

Status
Not open for further replies.

sribangaram

Full Member level 5
Full Member level 5
Joined
Apr 29, 2012
Messages
297
Helped
7
Reputation
14
Reaction score
7
Trophy points
1,298
Location
INDIA.:/;:'" VIJAYAWADA
Activity points
3,754
Friends I have a Rectifier That input 230 V out put 48 V, 50 Amps but Now i need to convert 5 v 50 Amps Is it Possible ? Please give the suggestion
 
Last edited:

Ofcourse you can convert 48V x 50Amp to 5V x 50 Amp. But since its a very high current system, you have to use transformer for that conversion process.
Would you please elaborate about your 'rectifier' circuitry???
 
This rectifier looks like a SMPS based converter. If you are planning to modify its output to 5v, I don't think it will be possible in a easy way. Its transformer, voltage sensors, PFC unit, etc. all are designed for a specific output. If it doesn't have a 5v output, You cannot change its circuitry for your desired output. But also it depends on how complex its circuit is.
 
@sribangaram....

I made this quick for you. Didn't tested it. Hope it would work.
If the output comes between 5v to 6v (say 5.5 or 5.7), you can add a diode similar to BR1. Remember to add proper heat sink with BR1 & Q2 if you are making it.

 

The 2N5886 transistor circuit is a low current circuit using a high current transistor. It will not supply 50A.
With such a small filter capacitor of only 470uF the circuit will have trouble producing 500mA.
The current gain of the 2N5886 transistor is only 4 at a current much less than 50A so the 100 ohm base bias resistor will be useless for a high output current.
 

@sribangaram....

I made this quick for you. Didn't tested it. Hope it would work.
If the output comes between 5v to 6v (say 5.5 or 5.7), you can add a diode similar to BR1. Remember to add proper heat sink with BR1 & Q2 if you are making it.


Friend how i will connect it through 48 v rectifier Please explain me

- - - Updated - - -

Friend Please check this link **broken link removed**
it's can work for me ? or not
 

Presumed the input voltage is actually 48V, the linear regulator must dissipate (48-5)*50 = 2150 W. Distributing this huge power to 6 transistors gives still 360 W per transistor, far from feasible with TIP2955. In any case a very large size heat sink would be needed.

On the other hand, 5V/50 A can be sourced by moderate size switch mode power supply.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top