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regulated power supply

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rocky01

New Member
Hi,
I want to build a regulated power supply for which I can vary the o/p voltage from 0 to 220V. can anyone pls help me?
 

Sceadwian

Banned
Something like that is better bought, it's no easy task to design and build a 0-220V power supply unless you know exactly what you're doing before you start.
 

Mikebits

Well-Known Member
And tell Mr. Creed I said hi! :)
 

Torben

Well-Known Member
Something like that is better bought, it's no easy task to design and build a 0-220V power supply unless you know exactly what you're doing before you start.
Agreed.

But just for the hell of it, what output current capacity were you hoping for?


Torben
 

Mikebits

Well-Known Member
My guess is 20 amp ... :)
 

Sceadwian

Banned
I'm taking bets at 2-1 odds the original poster never responds. =)
 

Hero999

Banned
AC/DC?

Servo controlled Varaic?
 

Sceadwian

Banned
Switch mode switch mode!
 

tcmtech

Banned
Most Helpful Member
Variac with a wide band adjustable linear regulator. The linear Reg uses a pot driven off the Variac shaft. :)
 

framerotblues

New Member
Digging this up because I'm building one.

Glad I found this forum. I'm looking to build my own variable linear DC power supply, and I don't know anyone else who I can bounce ideas off of, but this thread seemed to be the latest and closest to what I want to do. My apologies if the schematic seems haphazard - first time using it.



120V AC line supplies a Staco 0-180V variac, then rectified to provide DC. R1 allows slow initial charging of the capacitor banks, while F2-F4 keep the banks semi-isolated should one cap short out. Looking to get 120 VDC output at 10-12 amps. Ripple isn't a huge deal because I intend to do some inductor switching with it.



Caps are Sprague Powerlytic, 1100µF @ 250VDC. Will probably end up putting Plexiglas between the terminals to prevent arcing. Also will probably incorporate a contactor into the output terminals so shutting down the power supply isolates the capacitor bank from the output.



Installed in a nice Hoffman enclosure I picked up for a song. Since I have very little power supply building experience, I could really use some insight and opinions. Thanks in advance!

-Dave
 
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