my smps project help - 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 27th October 2007, 07:31 PM   #1
diyAudio Member
 
Join Date: May 2006
Send a message via AIM to zerohead_ak47 Send a message via MSN to zerohead_ak47
Default my smps project help

i have no oscilloscope

i think frequency is not important just wanna know that the value of
resistance rd ?
Attached Files
File Type: pdf smps.pdf (26.0 KB, 1075 views)
  Reply With Quote
Old 27th October 2007, 07:39 PM   #2
diyAudio Member
 
Join Date: May 2006
Send a message via AIM to zerohead_ak47 Send a message via MSN to zerohead_ak47
some photos

Click the image to open in full size.

and pcb , another photos
http://rapidshare.com/files/65575247/yap__305_lan.rar
  Reply With Quote
Old 28th October 2007, 07:03 AM   #3
luka is offline luka  Slovenia
diyAudio Member
 
luka's Avatar
 
Join Date: Sep 2005
Location: in Slovenia :)
Send a message via Skype™ to luka
Hi

What/where is this rd resistance?
__________________
home page @ http://www.classdaudio.tk/ @ 24/7 all year long
I FEEL SLOVENIA
  Reply With Quote
Old 28th October 2007, 07:10 AM   #4
diyAudio Member
 
Join Date: May 2006
Send a message via AIM to zerohead_ak47 Send a message via MSN to zerohead_ak47
Quote:
Originally posted by luka
Hi

What/where is this rd resistance?

7. pin - 380r (dead time)
  Reply With Quote
Old 28th October 2007, 07:54 AM   #5
luka is offline luka  Slovenia
diyAudio Member
 
luka's Avatar
 
Join Date: Sep 2005
Location: in Slovenia :)
Send a message via Skype™ to luka
Hi

I think you don't need it that high, I have 33 ohme I think, you can check that...100 would be still fine, but if you don't have any problems leave it as it is.
__________________
home page @ http://www.classdaudio.tk/ @ 24/7 all year long
I FEEL SLOVENIA
  Reply With Quote
Old 28th October 2007, 09:20 AM   #6
diyAudio Member
 
Join Date: May 2006
Send a message via AIM to zerohead_ak47 Send a message via MSN to zerohead_ak47
now i put 33ohm instead of 380ohm rd and then effeciency rised from%65 to %75 and the frequency rised to 70khz from 60khz
  Reply With Quote
Old 28th October 2007, 09:39 AM   #7
luka is offline luka  Slovenia
diyAudio Member
 
luka's Avatar
 
Join Date: Sep 2005
Location: in Slovenia :)
Send a message via Skype™ to luka
Hi

Which core do you use? I use 50k which should be enough for 800w+, so I don't think you will need 70k, but it all depends on type of core that you use
__________________
home page @ http://www.classdaudio.tk/ @ 24/7 all year long
I FEEL SLOVENIA
  Reply With Quote
Old 28th October 2007, 09:53 AM   #8
diyAudio Member
 
Join Date: May 2006
Send a message via AIM to zerohead_ak47 Send a message via MSN to zerohead_ak47
my transformer

http://www.epcos.com/inf/80/db/fer_01/04970499.pdf
  Reply With Quote
Old 28th October 2007, 10:08 AM   #9
luka is offline luka  Slovenia
diyAudio Member
 
luka's Avatar
 
Join Date: Sep 2005
Location: in Slovenia :)
Send a message via Skype™ to luka
Hi

Uff ETD59, lower freq. At 20K you still would get 1kw. And skin effect will be much smaller.

See here
http://sziget.mine.nu/~danko/letolte...tion_notes.pdf
__________________
home page @ http://www.classdaudio.tk/ @ 24/7 all year long
I FEEL SLOVENIA
  Reply With Quote
Old 28th October 2007, 10:49 AM   #10
diyAudio Member
 
Join Date: May 2006
Send a message via AIM to zerohead_ak47 Send a message via MSN to zerohead_ak47
using gold palted copper wire
  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
SMPS Elliott Project 89--Winding Xformers ghettorigged Parts 8 15th November 2013 06:04 PM
My Last Smps Project CHACALPOWERS Solid State 36 19th March 2010 01:59 AM
project smps for car acruwer Car Audio 37 5th September 2009 03:13 PM
Learning Project - Buck SMPS Joral Power Supplies 10 9th June 2009 08:08 PM
project smps for car acruwer Power Supplies 1 27th March 2006 04:10 PM


New To Site? Need Help?

All times are GMT. The time now is 08:40 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