atx power supply inductor operating max. frequency ? - 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 8th May 2010, 09:03 AM   #1
gev is offline gev  Turkey
diyAudio Member
 
gev's Avatar
 
Join Date: Jul 2005
Location: Turkey
Default atx power supply inductor operating max. frequency ?

Hello

standard pc power supply (tl494 control) output filter inductor what is the operating max. frequency ?

Click the image to open in full size.
__________________
320volt.com Elektronik ve biraz daha fazlası
  Reply With Quote
Old 8th May 2010, 03:16 PM   #2
cjk2 is offline cjk2  United States
diyAudio Member
 
Join Date: Nov 2006
Quote:
Originally Posted by gev View Post
Hello

standard pc power supply (tl494 control) output filter inductor what is the operating max. frequency ?

Click the image to open in full size.
These get lossy at around 300khz to 500khz or so I would say. Is it the yellow/white material or the green/blue variety? You can likely look up a datasheet for it.

Last edited by cjk2; 8th May 2010 at 03:19 PM.
  Reply With Quote
Old 8th May 2010, 06:43 PM   #3
gev is offline gev  Turkey
diyAudio Member
 
gev's Avatar
 
Join Date: Jul 2005
Location: Turkey
thanks @cjk2 yellow - white material

Click the image to open in full size.

Click the image to open in full size.
__________________
320volt.com Elektronik ve biraz daha fazlası
  Reply With Quote
Old 10th May 2010, 08:55 PM   #4
mag is offline mag  Switzerland
diyAudio Member
 
Join Date: Jan 2008
Location: Chiasso
Hello, this yellow-white core seems a
micrometals material -26 or some chinese "equivalents" usually found
in cheap atx power supplies.

Max operating frequency depends on the losses you can tolerate (temperature rise) an on the AC magnetic flux density swing.

First calculate your AC flux density swing and check on micrometals website a graph called core losses wrt. frequency and flux density for material -26 and check for core losses.

Material -26 has relatively high core losses compared to other iron powder cores and it is normally not suitable for operation above 50kHz more or less.
  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
ATX power supply noise. owenhamburg PC Based 9 16th November 2009 10:15 PM
ATX power supply needs a load to run??????? Video Freak Everything Else 2 8th February 2007 11:44 AM
Experiments with an ATX power supply martinab2 Solid State 0 29th March 2004 10:04 AM


New To Site? Need Help?

All times are GMT. The time now is 02:36 AM.


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