Yet another DIY AMT - Page 3 - diyAudio
Go Back   Home > Forums > Loudspeakers > Planars & Exotics

Planars & Exotics ESL's, planars, and alternative technologies

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 March 2013, 09:02 PM   #21
solhaga is offline solhaga  Sweden
diyAudio Member
 
Join Date: Jun 2009
Location: Värsta Götaland
Default Another simulated view

So I got the idea to invert the motor and simulate it from the side.
I hope that you get the picture, it is barely half a motor wide.
I believe that the field in the gap is really can be simulated this way.

In the simulated middle view you see the contour at the lower, middle and higher part of the gap. The plot shows the field along that contour. It is only in the middle of the gap the field is even.
Attached Images
File Type: jpg inverted.jpg (63.8 KB, 659 views)
File Type: jpg inverted ans.jpg (83.0 KB, 650 views)
File Type: jpg inverted plot.jpg (60.6 KB, 628 views)
  Reply With Quote
Old 26th March 2013, 09:16 PM   #22
solhaga is offline solhaga  Sweden
diyAudio Member
 
Join Date: Jun 2009
Location: Värsta Götaland
The same as above but with the lower row shifted 3 mm thus simulating "Design thought One".
Attached Images
File Type: jpg inverted and shifted.jpg (71.9 KB, 590 views)
File Type: jpg inverted and shifted ans.jpg (87.8 KB, 555 views)
File Type: jpg inverted and shifted plot.jpg (63.9 KB, 68 views)
  Reply With Quote
Old 26th March 2013, 09:23 PM   #23
solhaga is offline solhaga  Sweden
diyAudio Member
 
Join Date: Jun 2009
Location: Värsta Götaland
And what would a membrane feel about that?
Attached Images
File Type: jpg membrane ans.jpg (95.9 KB, 65 views)
File Type: jpg membrane bn.jpg (74.9 KB, 58 views)
File Type: jpg membrane bt.jpg (71.1 KB, 42 views)
  Reply With Quote
Old 26th March 2013, 09:37 PM   #24
diyAudio Member
 
Join Date: Dec 2008
Is this "motor " the same as you started with?
If so,I think your drawing is wrong.
The iron must bee on the same magnet.Your draving shows 2 magnets.
I might be wrong,but i dont think you shuld worry about the magnetic field,to me it looks fine from the first simulations.

Bernt
  Reply With Quote
Old 26th March 2013, 09:42 PM   #25
solhaga is offline solhaga  Sweden
diyAudio Member
 
Join Date: Jun 2009
Location: Värsta Götaland
This is just to be able to simulate the field in the gap. It is not the actual motor.
It is "So I got the idea to invert the motor and simulate it from the side."
  Reply With Quote
Old 26th March 2013, 09:45 PM   #26
diyAudio Member
 
Join Date: Dec 2008
I think you have to use a 3D simulating program to get it right.

Bernt
  Reply With Quote
Old 26th March 2013, 09:46 PM   #27
solhaga is offline solhaga  Sweden
diyAudio Member
 
Join Date: Jun 2009
Location: Värsta Götaland
Default Rounded edges

So what if the edges of the iron rods in the gap were rounded?
First two is with square corners, the last two with rounded corners.

The field is stronger, but also has higher fluctuations.
Attached Images
File Type: jpg inverted and shifted ans.jpg (89.3 KB, 73 views)
File Type: jpg inverted and shifted plot.jpg (61.9 KB, 58 views)
File Type: jpg inverted and shifted rounded ans.jpg (84.1 KB, 62 views)
File Type: jpg inverted and shifted rounded plot.jpg (65.9 KB, 58 views)
  Reply With Quote
Old 26th March 2013, 09:47 PM   #28
solhaga is offline solhaga  Sweden
diyAudio Member
 
Join Date: Jun 2009
Location: Värsta Götaland
Quote:
Originally Posted by båndsei View Post
I think you have to use a 3D simulating program to get it right.

Bernt
Yes, but this is just a comparative study.
  Reply With Quote
Old 26th March 2013, 09:52 PM   #29
solhaga is offline solhaga  Sweden
diyAudio Member
 
Join Date: Jun 2009
Location: Värsta Götaland
I think I´ve made it clear that the offset of the rods has a neglectible effect on the field in the gap.
So I´d say it is okay to assemble the motor this way.

Anyway, I now have the option to mount the membrane with the pleats in parallell with the slots.

Last edited by solhaga; 26th March 2013 at 10:14 PM.
  Reply With Quote
Old 27th March 2013, 06:00 AM   #30
solhaga is offline solhaga  Sweden
diyAudio Member
 
Join Date: Jun 2009
Location: Värsta Götaland
A comment on post #22 and #23.

The alu-strips will of course be in the middle 2-3 mm of the gap and thus not subject to the fringe effects.
  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
Diy AMT båndsei Planars & Exotics 428 19th May 2014 06:21 PM
AMT diaphragm DIY basics. graeme uk Planars & Exotics 2 9th December 2010 09:17 PM
big AMT Diy Charcoal Planars & Exotics 27 13th October 2008 06:41 AM
Diy Amt ? woody Planars & Exotics 0 24th September 2005 11:17 AM
Diy Amt JohnL Planars & Exotics 4 29th April 2005 03:16 PM


New To Site? Need Help?

All times are GMT. The time now is 04:24 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