Adjustable +/- 0-50V 0-5A Power Supply Schematics - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 28th August 2010, 06:42 PM   #11
diyAudio Member
 
Join Date: Oct 2006
Fuente regulable de 0 a 50 v. - 0 a 5 amp.
  Reply With Quote
Old 28th August 2010, 06:50 PM   #12
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
This will do just fine -- HP6129C 0-50V, 5A Continuous:

Click the image to open in full size.

Click the image to open in full size.
  Reply With Quote
Old 29th August 2010, 12:32 PM   #13
joaquim is offline joaquim  Sweden
diyAudio Member
 
joaquim's Avatar
 
Join Date: Apr 2010
Thumbs up Nice!!!

Very very very VERY nice! HP's test equipment has always been my kind of flavour, and B&K...

I'm in the "start blocks", to begin a new project, a dual Lab-PSU. I have spent many hours with Pspice(OrCAD v.16) to come up with a high V/A dual linear power supply, with all the necessary "trimmings".
Like(except the obvious feature, V-adj.), ampere adjustment, over voltage - i.e, if you want to drive an old HAM Radio equipment you don't want to get a spike - Digital volt/ampere display, a AC-millivolt meter to monitor noise, short circuit prof, and more...
I'm going to write a "diary" 'bout this project on my blog, the "heart" of the bench psu, the trafo, came with the post last week. It's ring trafo, 2x42VAC@650VA, it has 10-0-10 and 12V~, as well and is necessary for the project, LAB-PSU.

It's an "all discrete" design, I use a couple of OP-Amps for monitoring, and ICL7107 for voltage and ampere...

It(or I'm aim at...) will be capable to deliver +/- 50VDC, @ 7 - 10A per rail.... 6xMJ15003/15004 parallel coupled, output BJT's, MJ1500x is capable of 250W, 120V, 20A each, so about 1.35A@50V each, comes to approximate 70W, so cooling shouldn't be a problem...

But one might find a used unit, slightly defect on E-bay, that's worth while to repair... but it is more fun, building your own, or?

Last edited by joaquim; 29th August 2010 at 12:43 PM.
  Reply With Quote
Old 29th August 2010, 02:15 PM   #14
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Joaquim:

I think that a simpler design strategy is to use a 500 watt Class-D amplifier and drive a power transformer, rectify and filter -- you can use an analog opto-coupler to provide feedback -- this way you burn many fewer watts with minimal energy dissipated in pass devices. I'd spend the time programming a DAC with a modified sine wave to boost the efficiency but spare the design the switching transients of a DC-DC converter.


Two of the HP supplies were purchased surplus from an aircraft/defense contractor in NY for $1, but I had to pick them up!
  Reply With Quote
Old 29th August 2010, 06:05 PM   #15
diyAudio Member
 
Sch3mat1c's Avatar
 
Join Date: Jan 2003
Location: Milwaukee, WI
Send a message via ICQ to Sch3mat1c Send a message via AIM to Sch3mat1c
Cough, or make a real switching supply...

Ugh, class D amp with iron transformer and big filter caps? I'm gonna be sick.
__________________
Seven Transistor Labs
Projects and Resources
  Reply With Quote
Old 29th August 2010, 07:52 PM   #16
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Quote:
Originally Posted by Sch3mat1c View Post
Cough, or make a real switching supply...

Ugh, class D amp with iron transformer and big filter caps? I'm gonna be sick.
Those HP6129's are just amplifiers -- uses a DAC made of discrete components -- each bit is trimmable.

I am just pulling a leaf from the book I worked in decades ago -- we used Mac's with 6L6's to power the ultra-low noise stuff in the lab. No reason it couldn't be implemented with some DSP at a higher switching frequency.
  Reply With Quote
Old 30th August 2010, 04:20 PM   #17
joaquim is offline joaquim  Sweden
diyAudio Member
 
joaquim's Avatar
 
Join Date: Apr 2010
Well I've paid a smaller fortune for the trafo - 650VA... But I was going to build a SMPS as a LAB PSU at first... I have a 0-250V~ 3A Variac, to which I can hookup any trafo and adjust the output, I have a circuit board with a rectifier B1000C25000 and 100V, 10 000F cap's on it, and old-school stabilization, two 40W light bulbs
And it's been used to death, or almost anyway... the panel instruments, V/A, has give in, and sure I can use a DMM to monitor the voltage/current...
But I'm a bit "goofy" that way, I want to build everything analogue and with discrete components if possible...
I work with AVR/PIC C programming day out and day in... and it's cheap, easy(if you can C or Assambler), one MCU say ATxmega - Almost any model - can both switch, drive a LCD, "show" noise, draw up graphs and more, and all that for less then €10 + x-hour of programming, but most code you can copy of the net, and modify to fit your purpose. And templates and other pre-done code, comes with AVR Studio SP2. I've used ATmega32 16MHz clock to almost everything, the draw back is that it has no DAC's and UARTs, in all other way it's a great easy to use MCU. I recommend it as a "beginners" circuit. It has JTAGICE(mk I) interface and is fully supported by AVR Studio 4 SP2, for "xmega" you'll need the JTAG ICE mk II, ATMEL's own is recommended, it has all features, Programmer/Debug/IPS etc. Now I'm way of topic.. sorry 'bout that .

It will be a linear all discrete components design! Maybe l8 on I'll get "down and nasty", with an all "digital" SMPS Lab supply... I can always start with programming the MCU, I reckon it'll take many hours behind the keyboard before I get it right... when you think you've got just right there's some bug in it, "to err is human", or ;-)
  Reply With Quote
Old 13th April 2012, 10:10 PM   #18
wjhos is offline wjhos  Netherlands
diyAudio Member
 
Join Date: Aug 2009
Hello,
I am interested in your dual power supply +/-50v
From the schematics and the BOM i gather that there is a site where i can find more info regarding specs, possible mods, calibrating, PCB layout etc. Can you help me out.
regards

W.J. Hos
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
power supply +/- 70v 5A fity Chip Amps 1 18th August 2012 07:34 AM
desing +/- 70v 5A power supply fity Power Supplies 9 15th April 2012 06:36 PM
Adjustable regulator for 50v Dengbej Parts 9 19th April 2007 04:52 PM
60 V 5A linear power supply duffman Solid State 2 29th October 2005 07:20 AM
heater supply (xformer specs are 6.3V 2.5A) as supply for a power LED? jarthel Tubes / Valves 10 21st July 2003 01:30 PM


New To Site? Need Help?

All times are GMT. The time now is 01:41 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2