1000W SMPS Based on IR2110 - Page 3 - 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 30th April 2011, 03:25 PM   #21
Audia is offline Audia  United States
Banned
 
Join Date: Feb 2011
Quote:
Originally Posted by AP2 View Post
Hi,
I admire their efforts to achieve a good smps, perhaps the road is still long.
Meanwhile, 4x0.4 = 1.6 (only in mathematics) is not on the wires.

Correct
  Reply With Quote
Old 30th April 2011, 03:40 PM   #22
MOER is offline MOER  United States
diyAudio Member
 
Join Date: Aug 2003
Location: SIMI VALLEY CA
Default PDF of schematic

This file is corrupted, it shows as only 36kB.

Can you repost?
  Reply With Quote
Old 30th April 2011, 03:50 PM   #23
kubeek is offline kubeek  Czech Republic
diyAudio Member
 
Join Date: Dec 2005
Location: Prague, Czech Rep
Send a message via ICQ to kubeek
Quote:
Originally Posted by MOER View Post
This file is corrupted, it shows as only 36kB.

Can you repost?
Does 36KB mean it HAS to be corrupted? I have no problem with it, so can you re-download?
  Reply With Quote
Old 1st May 2011, 07:14 PM   #24
hesener is offline hesener  Germany
diyAudio Member
 
Join Date: Mar 2005
Location: Munich, Germany
Took another look at this design and I must still say I like it. What puzzled me though is that there is no output inductor, quite unusual for a forward converter. But it is possible and doable, although it has a few downsides:
- regulation is difficult (not a problem here since there is no voltage regulation loop)
- high peak currents at turn on (not a problem here, since the thermistor at the input will limit the currents on turn on)

These peak currents are only limited by the ESR of the output caps and transformer (both probably quite low), the RDSON of the MOSFETs and the ESL of the transformer, also quite low.

Audia, is it possible to blow the MOSFETs with a short moment of input power missing? Did you (by any chance) measure the current peaks at turn on ? Just curious......

Also, your gate resistors seem quite low, increasing them a little bit might help wiht the noise and voltage peaks...

Attached the schematic pdf again for those whou couldnt download, it worked fine on my computer
Attached Files
File Type: pdf smps v2.1 sch-1.pdf (30.7 KB, 1462 views)
  Reply With Quote
Old 2nd May 2011, 12:31 PM   #25
Audia is offline Audia  United States
Banned
 
Join Date: Feb 2011
Default SMPS HELP

Quote:
Originally Posted by hesener View Post
Took another look at this design and I must still say I like it. What puzzled me though is that there is no output inductor, quite unusual for a forward converter. But it is possible and doable, although it has a few downsides:
- regulation is difficult (not a problem here since there is no voltage regulation loop)
- high peak currents at turn on (not a problem here, since the thermistor at the input will limit the currents on turn on)

These peak currents are only limited by the ESR of the output caps and transformer (both probably quite low), the RDSON of the MOSFETs and the ESL of the transformer, also quite low.

Audia, is it possible to blow the MOSFETs with a short moment of input power missing? Did you (by any chance) measure the current peaks at turn on ? Just curious......

Also, your gate resistors seem quite low, increasing them a little bit might help wiht the noise and voltage peaks...

Attached the schematic pdf again for those whou couldnt download, it worked fine on my computer

OK

While, as it seems to me you are professional into power electronics.

I would like to know from you:

1- What is the deference between SMPS for Audio and SMPS for LCD TV?
2- What is your suggestions to improve my SMPS above?
3- Can you suggest me a schematic for commercial SMPS unit? that you will not make it bleed.
4- How you can help me with output inductors? Tel me whats missing

I understand your robust experience into SMPS, its clear to me
, Hope to help me out

Turn On current? hmmm I never blew any Mosfet. I know what I am doing

That SMPS is not the END of the world, its a proto, and will improve it
  Reply With Quote
Old 2nd May 2011, 03:37 PM   #26
hesener is offline hesener  Germany
diyAudio Member
 
Join Date: Mar 2005
Location: Munich, Germany
Hi Audia,

again, your power supply is fine. There is no mistake, and I never used the word.

It just looks to me that you traded output voltage precision ( which would require a feedback loop) for dynamic power delivery. Thats a design choice, not good or bad as such.

I would only suggest that (due to the reasons on peak current stated earlier) you might want to consider an inrush current protection e.g. with discharging C33 when the current gets too high, like 2x the nominal input current. I have attached a proposal how that could be implemented. You may need to play with the component values a little bit, as I haven'T tested this.

just my two cents...
Attached Images
File Type: jpg 1kwsmps.jpg (197.3 KB, 2311 views)
  Reply With Quote
Old 2nd May 2011, 03:46 PM   #27
Audia is offline Audia  United States
Banned
 
Join Date: Feb 2011
Quote:
Originally Posted by hesener View Post
Hi Audia,

again, your power supply is fine. There is no mistake, and I never used the word.

It just looks to me that you traded output voltage precision ( which would require a feedback loop) for dynamic power delivery. Thats a design choice, not good or bad as such.

I would only suggest that (due to the reasons on peak current stated earlier) you might want to consider an inrush current protection e.g. with discharging C33 when the current gets too high, like 2x the nominal input current. I have attached a proposal how that could be implemented. You may need to play with the component values a little bit, as I haven'T tested this.

just my two cents...

I already have current protection circuit witch works perfectly.
Thanks for your idea.

You told me nothing about Output Inductors and how they will improve the overall performance of my SMPS


Thanks
  Reply With Quote
Old 2nd May 2011, 03:51 PM   #28
hesener is offline hesener  Germany
diyAudio Member
 
Join Date: Mar 2005
Location: Munich, Germany
Hi Audia,

sorry here some comments on your questions:

1- What is the deference between SMPS for Audio and SMPS for LCD TV?
Audio is much more a dynamic load than a TV. And, the noise should be low, especially in the audio range. That will usually require a different design, such as yours. For TVs, voltage stability is mandatory since it might impact hte brightness and colours significantly, and the lifetime of the display. Also, they need highest efficiency since the power supply usually is integrated into the flatscreen, and if it were hot it would show up in the image.

2- What is your suggestions to improve my SMPS above?
As per my previous post, nothing much to add except inrush (over-) current protection.

3- Can you suggest me a schematic for commercial SMPS unit? that you will not make it bleed.
Again, your design is fine. "make it bleed" probably refers to blowing MOSFETs, and here I would like to quote wayne colburn from pass labs, who said "your design isnt finished until you can break it and repair at will". So, blowing some parts is part of the fun!

4- How you can help me with output inductors? Tel me whats missing
The output inductors are usually used to store energy and smooth out the rectangular pulses you are sending from the primary side. In your design, the output caps do that job. If the power supply works for you, I would leave it as it is. Any output inductor may reduce peak output current delivery.

What's the switching frequency of this converter?

just my two cents
  Reply With Quote
Old 2nd May 2011, 03:54 PM   #29
hesener is offline hesener  Germany
diyAudio Member
 
Join Date: Mar 2005
Location: Munich, Germany
The overcurrent protection circuit, is it included in the schematic you posted here? I couldnt find it...
  Reply With Quote
Old 2nd May 2011, 04:01 PM   #30
Audia is offline Audia  United States
Banned
 
Join Date: Feb 2011
80KHZ resonant
Attached Images
File Type: jpg IMAG0760.jpg (276.3 KB, 2256 views)

Last edited by Audia; 2nd May 2011 at 04:11 PM.
  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
car smps based on TL494 himanshuraval Car Audio 54 5th January 2013 02:45 AM
need help to build my own smps based on blaupunkt schematics gta400 please Ground Zero Car Audio 148 19th August 2011 01:03 PM
Need SMPS circuit for LM3886 based audio amp pradeeppk Power Supplies 97 24th May 2011 07:20 PM
Need urgent help with SMPS SG3525 based mastero Power Supplies 22 9th August 2006 12:30 PM
Car poweramp SMPS repair TL594CN based design, help! Puggie Power Supplies 3 2nd August 2006 08:21 PM


New To Site? Need Help?

All times are GMT. The time now is 10:09 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