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48v 50 amp rectifier to 5v 50 amp conversion

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sribangaram

sribangaram

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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
 
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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.
 

Genovator said:
@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.

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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.
 

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