Need Help with 54V dc rectifier and regulator design.

Thread Starter

mastero1976

Joined Sep 10, 2022
3
Hello Friends,

Since this is my first post would like to introduce myself ...
I am from India and run a automobile workshop designing PCB and electronics is an hobby. Have completed numerous projects with Microcontroller .

I am here for some help and advice.

As you can see in the enclosed design Single Phase full wave shunt rectifier and regulator. It is designed for 15vdc scooter charging circuit.
I was thinking of modifying the stator and producing 100v @ 5k RPM which can be fed to MB254 and give me unregulated dc volts.

what mods do i have to do to make the regulation part work at 55Vdc.

a) 12vZener needs changing
b) 22uf/25v caps needs changing

anything else ??

Thanx for your help and advice

cheers
mastero
 

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LowQCab

Joined Nov 6, 2012
2,506
Do You realize that You will not get any more "Power" ?
in other words, when You increase the Voltage by ~4.5X,
the maximum Current available will be reduced by ~4.5X.

How much Current do You need at ~55-Volts ?
What type of device do You want to provide Power to ?
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Thread Starter

mastero1976

Joined Sep 10, 2022
3
Do You realize that You will not get any more "Power" ?
in other words, when You increase the Voltage by ~4.5X,
the maximum Current available will be reduced by ~4.5X.

How much Current do You need at ~55-Volts ?
What type of device do You want to provide Power to ?
.
.
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Hello LowQcab,

Thanx for the reply.

I know higher voltage will reduce the amps.
I just want 54vdc @10amps, to charge a Lithium battery pack. 48V/36ah

any suggestion / advice ?

cheers
mastero
 

LowQCab

Joined Nov 6, 2012
2,506
That's ~540-Watts.

"" I was thinking of modifying the stator .......... ""


Are You talking about modifying the Stator on a Scooter-Engine ?,
You will never get ~500-Watts from a Scooter-Engine.

If You are really good at designing a completely new Alternator-Coil and Magnet-System,
You "might" get ~50-Watts ........... maybe ........... if you're lucky.

50-Watts would equal around ~55-Volts at less than 1-Amp.
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