ucd 25 watts to 1200 watts using 2 mosfets - Page 259 - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

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 26th September 2012, 03:53 AM   #2581
diyAudio Member
 
Join Date: Mar 2008
Location: ksa
hello, fra it's on page 254 you can print it on A4 size 1:1 ratio.
  Reply With Quote
Old 26th September 2012, 12:42 PM   #2582
diyAudio Member
 
andrewlebon's Avatar
 
Join Date: Feb 2008
Default ULTIMATE CORE

Micrometals Arnold Powder Cores
Hello
greetings just want some knowledge on cores used in dclass amps
1 Optilloy optimised alloy powder
2 Super MSS
3 Mollypermalloy powder cores
4 Sendust kool mu cores
5 Iron powder cores

which is the best core from the five following materials secondly does more
permeability make the core better i ask this because everyone is using
iron powder core but DETEX audio uses sendust material core in all his d class
amp kits and lastly what core do proffessional d class amps use in high power amps hoping someone can enlighten me and all
warm regards
andrew lebon
__________________
[image][/image]"It's Better to try and fail than to never know and always wonder"
  Reply With Quote
Old 29th September 2012, 03:04 AM   #2583
diyAudio Member
 
andrewlebon's Avatar
 
Join Date: Feb 2008
Hi jlester87
greetings the IRS1500 pcb has ocp on board it works makes no sense attaching another pcb i have almost finished irs 3000 pcb will upload working amp pics
TRY IT
warm regards
andrew lebon
__________________
[image][/image]"It's Better to try and fail than to never know and always wonder"
  Reply With Quote
Old 30th September 2012, 11:08 AM   #2584
diyAudio Member
 
Join Date: Sep 2010
Location: Quezon City
Hi,

I have this green toroid, but has unusually high value of inductance, in the picture it only takes one turn to make a 64uH value, 4 turns in this toroid has a value of 500uH!
Can I use this with any class D amp?

I have another yellow toroid from computer smps, I'll just make a gap to make it usable.

Thanks
Attached Images
File Type: jpg IMG_2240.JPG (554.4 KB, 1062 views)
File Type: jpg IMG_2242.JPG (556.2 KB, 931 views)

Last edited by jlester87; 30th September 2012 at 11:21 AM.
  Reply With Quote
Old 30th September 2012, 11:39 AM   #2585
Banned
 
Join Date: Jan 2005
You cannot use any of those two, they are simply the wrong type.

You need a T106-2 from micrometals or similar for class d output.
  Reply With Quote
Old 30th September 2012, 12:26 PM   #2586
diyAudio Member
 
Join Date: Sep 2010
Location: Quezon City
Is T184-2 enough for 1kw power?

Thanks
  Reply With Quote
Old 30th September 2012, 12:30 PM   #2587
Pafi is offline Pafi  Hungary
diyAudio Member
 
Join Date: May 2004
Location: Budapest
Quote:
Originally Posted by jlester87 View Post
Hi,

I have this green toroid, but has unusually high value of inductance, in the picture it only takes one turn to make a 64uH value, 4 turns in this toroid has a value of 500uH!
Can I use this with any class D amp?

I have another yellow toroid from computer smps, I'll just make a gap to make it usable.

Thanks
On the picture I see 2 turns and 2 cores together. Al=64000nH/2/4=8000 nH/turns^2 It's ferrite. If you can break it into 4 symmetrical quarters, and insert 4*0.4 mm air gap, it can be a good core for output inductor.

Yellow toroid is very bad, gapping makes it somewhat better, but not good.
Attached Images
File Type: jpg Multi-gapped ferrite.jpg (41.4 KB, 808 views)
File Type: jpg Hi Q inductor.jpg (24.7 KB, 723 views)
  Reply With Quote
Old 30th September 2012, 12:31 PM   #2588
diyAudio Member
 
andrewlebon's Avatar
 
Join Date: Feb 2008
hello
greetings can anyone please reply to post 2582 for best core IRS3000 IS WORKING
is iron powder or sendust material core better
warm regards
andrew lebon
__________________
[image][/image]"It's Better to try and fail than to never know and always wonder"
  Reply With Quote
Old 30th September 2012, 12:32 PM   #2589
Pafi is offline Pafi  Hungary
diyAudio Member
 
Join Date: May 2004
Location: Budapest
Quote:
Originally Posted by jlester87 View Post
Is T184-2 enough for 1kw power?

Thanks
Much more then enough! Up to about 4 kW.
  Reply With Quote
Old 30th September 2012, 12:54 PM   #2590
Pafi is offline Pafi  Hungary
diyAudio Member
 
Join Date: May 2004
Location: Budapest
Quote:
Originally Posted by andrewlebon View Post
hello
greetings can anyone please reply to post 2582 for best core IRS3000 IS WORKING
is iron powder or sendust material core better
warm regards
andrew lebon
Optimal material and permeability is a very long procedure to analyse.
Especially if there is no optimisation target specified.

I can tell only 1 thing: that iron powder on your link (840 mW/ccm, mu=75) is not good enough, but there are many other options.
  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
Philips 40/25/15 watts amplifier with Universal preamplifier circuit. renjiish Solid State 64 28th July 2014 11:33 AM
Decibel Watts VS Watts ? fivestring Solid State 11 1st April 2009 01:08 PM
AMP1-B: why only 25 watts @8ohms? theAnonymous1 Class D 10 15th August 2005 06:55 PM
Sound quality of amps at 0.3 watts vs @ typical 5 watts rick57 Solid State 2 26th March 2005 06:25 AM
Need 2 watts Vivek Everything Else 4 17th July 2003 08:29 AM


New To Site? Need Help?

All times are GMT. The time now is 08:13 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