Virtual Battery Schematic - 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 29th February 2008, 11:46 PM   #1
jkeny is offline jkeny  Ireland
Banned
 
Join Date: Feb 2007
Location: Dublin
Default Virtual Battery Schematic

Has anybody used this type of regulated PS & how good is it? I've searched under "virtual battery" but can't find anything on DIYA. Here's a short description:

Quote:
The supply is regulated with a Darlington hybrid (an IRF power MOSFET and a Motorola BUX48 power transistor) to implement a virtual battery (the circuit is based on a Technics design). The MOSFET/NPN pair can conduct up to 400V at 15A and will easily handle the surge currents of large power supply capacitors. The BUX48 should be heatsinked to dissipate about 6W.
I'm thinking of it for a lower voltage of up to 50V. Can it be made variable voltage output?
Attached Images
File Type: gif regulated power supply.gif (4.6 KB, 695 views)
  Reply With Quote
Old 29th February 2008, 11:47 PM   #2
jkeny is offline jkeny  Ireland
Banned
 
Join Date: Feb 2007
Location: Dublin
Here's another version under the name Power Follower from here: http://www.audiodesignguide.com/PowerFollower/

Quote:
So, this circuit adopt a little capacitor after the bridge (only 3300uF for an amplifier working with 3A bias).

This capacitor is followed by a MOSFET voltage regulator, featuring a very low frequency CR filter (220uF/100Kohm) which is based on the Virtual Battery Operation, invented by Technics (something good can be found in the consumer world, too).
Attached Images
File Type: gif follower_99d.gif (13.7 KB, 581 views)
  Reply With Quote
Old 1st March 2008, 08:24 AM   #3
gootee is offline gootee  United States
diyAudio Member
 
Join Date: Nov 2006
Location: Indiana
Blog Entries: 1
Hi jkeny,

You might want to do some searches for different types of regulators, such as Jung or Jung-Didden Super Regulator, Sulzer Regulator, Shunt Regulator, and Series Regulator. You might also want to check out this sticky thread in the Solid State forum: "Bob Cordell Interview: Power Supplies", at Bob Cordell Interview: Power Supplies .
__________________
The electrolytic capacitors ARE the signal path: http://www.fullnet.com/~tomg/zoom3a_33kuF.jpg
  Reply With Quote
Old 1st March 2008, 02:13 PM   #4
diyAudio Member
 
Join Date: May 2006
Default Re: Virtual Battery Schematic

Quote:
Originally posted by jkeny
searched under "virtual battery" but can't find anything
I wonder why

Seriously, this is not a regulator, it is an active filter. There is no load or line regulation, only some amount of AC reduction.

The second circuit is missing a couple of electron tubes and transformers
__________________
--WD
  Reply With Quote
Old 1st March 2008, 02:29 PM   #5
jkeny is offline jkeny  Ireland
Banned
 
Join Date: Feb 2007
Location: Dublin
Are you guys saying that there is no value to this technique other than
Quote:
some amount of AC reduction
?
  Reply With Quote
Old 1st March 2008, 04:14 PM   #6
diyAudio Member
 
Join Date: May 2006
the "virtual battery" (what baloney) tracks input voltage as changed by variations in line voltage and load, and takes out some AC. That may be useful under some special circumstances. In the tube days, this was done using a large choke, that's in a way what this circuit simulates.

A proper regulator gives you a known output voltage, low source resistance (as it regulates out changes due to both load and line changes), and better AC filtering, too.
__________________
--WD
  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
Battery Charger for 15V Li-ION Battery Pack ??? Jan Dupont Parts 2 11th April 2009 02:18 PM
Virtual Ground ? Bernhard Solid State 13 4th March 2009 01:57 PM
Battery PS: Virtual ground or single supply? Dominique Power Supplies 2 5th May 2007 11:34 PM
Looking for 9v battery charger schematic Nordic Power Supplies 2 31st August 2006 07:29 AM
Virtual battery operation A'af Solid State 6 16th August 2002 04:25 AM


New To Site? Need Help?

All times are GMT. The time now is 02:22 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