Brushed/Brushless motors, speed controls, gear drives Discuss all aspects of brushless motors, brushed motors, speed controls (ESC's), gear drives and propellers in this forum.

CD-rom Brushless Outrunner Motors

Reply

Old 11-01-2007, 08:08 PM
  #26  
j.m.
Senior Member
Thread Starter
 
Join Date: Sep 2007
Location: Raleigh, NC
Posts: 2,622
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: CD-rom Brushless Outrunner Motors

Yeah, that's what i was thinking. So, does gobrushless.com have it wrong since they sell aluminum ones? Or does it not really have to be made out of iron?
j.m. is offline  
Reply With Quote
Old 11-01-2007, 08:14 PM
  #27  
ron_van_sommeren
 
ron_van_sommeren's Avatar
 
Join Date: Sep 2002
Location: Nijmegen/the NetherlandsNetherlands, NETHERLANDS
Posts: 416
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: CD-rom Brushless Outrunner Motors

Tube / flux ring has to iron, front- and backplate can be anything.
ron_van_sommeren is offline  
Reply With Quote
Old 11-01-2007, 08:20 PM
  #28  
jdetray
Senior Member
 
jdetray's Avatar
 
Join Date: Dec 2004
Location: Napoleon, OH
Posts: 1,617
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: CD-rom Brushless Outrunner Motors

You are mistaken. GoBrushless does not sell aluminum flux rings. All of the GoBrushless flux rings are made from low-carbon steel. An aluminum flux ring would not work well, if at all.

[link=http://www.gobrushless.com/shop/index.php?app=ccp0&ns=prodshow&ref=C-22]This is a combination end bell and flux ring[/link], made from steel.

A two piece design is also available, with an [link=http://www.gobrushless.com/shop/index.php?app=ccp0&ns=prodshow&ref=GBxEB]aluminum end bell[/link] and a separate [link=http://www.gobrushless.com/shop/index.php?app=ccp0&ns=prodshow&ref=GBxFR]steel flux ring[/link].

- Jeff
jdetray is offline  
Reply With Quote
Old 11-01-2007, 08:21 PM
  #29  
j.m.
Senior Member
Thread Starter
 
Join Date: Sep 2007
Location: Raleigh, NC
Posts: 2,622
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: CD-rom Brushless Outrunner Motors

is this iron and aluminum? Because it looks like it's machined out of solid aluminum. I understand why it owuld be easier for the enbell to be iron, but does it ABSOLUTELY have to be? Because I do have modeling experience, and i will be able to glue the magnets to the ring with out them sticking to it because of the magnetic probarties of the metal. Does anyone know where to get an endbell for a 17.8mm stator?
j.m. is offline  
Reply With Quote
Old 11-01-2007, 08:23 PM
  #30  
ron_van_sommeren
 
ron_van_sommeren's Avatar
 
Join Date: Sep 2002
Location: Nijmegen/the NetherlandsNetherlands, NETHERLANDS
Posts: 416
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: CD-rom Brushless Outrunner Motors

Yes, I'm certain.

[arrogant mode on]I have an EE degree[/arrogant mode off]

And if that does not convince you, the gobrushess motors would hardly run, if at all, with an aluminium flux ring. People would send all of them back to gobrushless.
ron_van_sommeren is offline  
Reply With Quote
Old 11-01-2007, 08:30 PM
  #31  
jdetray
Senior Member
 
jdetray's Avatar
 
Join Date: Dec 2004
Location: Napoleon, OH
Posts: 1,617
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: CD-rom Brushless Outrunner Motors

j.m. -

Let's try this again. Please pay attention!

The flux ring MUST be iron or steel. In designs where the endbell and flux ring are made from a single piece of metal, it must be iron or steel.

In designs where the flux ring and end bell are two separate pieces, such as the GoBrushless GBx line, the end bell can be aluminum. But the flux ring MUST be iron or steel.

Clear?

- Jeff
jdetray is offline  
Reply With Quote
Old 11-02-2007, 01:48 PM
  #32  
j.m.
Senior Member
Thread Starter
 
Join Date: Sep 2007
Location: Raleigh, NC
Posts: 2,622
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: CD-rom Brushless Outrunner Motors

Sorry, i was writing my post when you were typing yours, and you must have out yours up first.
j.m. is offline  
Reply With Quote
Old 11-02-2007, 03:10 PM
  #33  
j.m.
Senior Member
Thread Starter
 
Join Date: Sep 2007
Location: Raleigh, NC
Posts: 2,622
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: CD-rom Brushless Outrunner Motors

So, i can't find a 17.8mm rotor anywhere. Do i just use a 20mm endbell with really big magnets?
j.m. is offline  
Reply With Quote
Old 11-05-2007, 05:29 PM
  #34  
j.m.
Senior Member
Thread Starter
 
Join Date: Sep 2007
Location: Raleigh, NC
Posts: 2,622
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: CD-rom Brushless Outrunner Motors

C'mon guys.
j.m. is offline  
Reply With Quote
Old 11-05-2007, 05:57 PM
  #35  
jdetray
Senior Member
 
jdetray's Avatar
 
Join Date: Dec 2004
Location: Napoleon, OH
Posts: 1,617
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: CD-rom Brushless Outrunner Motors

GoBrushless sells a [link=http://www.gobrushless.com/shop/index.php?app=ccp0&ns=prodshow&ref=MGBX-KIT]motor kit based around a 17.8mm stator[/link], but they don't sell the parts separately. Perhaps if you go to their site and contact them, they could assist you. Or if your father has "about 50" drives in the closet, you could find a suitable can in one of them.

- Jeff
jdetray is offline  
Reply With Quote
Old 11-05-2007, 08:23 PM
  #36  
j.m.
Senior Member
Thread Starter
 
Join Date: Sep 2007
Location: Raleigh, NC
Posts: 2,622
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: CD-rom Brushless Outrunner Motors


What about floppy drives since those are bigger? This might just be used in a plane.
j.m. is offline  
Reply With Quote
Old 11-05-2007, 08:32 PM
  #37  
jdetray
Senior Member
 
jdetray's Avatar
 
Join Date: Dec 2004
Location: Napoleon, OH
Posts: 1,617
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: CD-rom Brushless Outrunner Motors

Have you read the thread I referenced in post #11? That's all I know about floppy drive motors.

- Jeff
jdetray is offline  
Reply With Quote
Old 11-06-2007, 08:49 PM
  #38  
j.m.
Senior Member
Thread Starter
 
Join Date: Sep 2007
Location: Raleigh, NC
Posts: 2,622
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: CD-rom Brushless Outrunner Motors

Alright, took out a floppy motor, and they are really big around, and not that thick. I don't think it is normal because it has 15 teeth on the stator. This time i didn't destroy the bell, so i still have that and the mags. I want to know where i can find a shaft this big. I think that it's a 5mm shaft.
j.m. is offline  
Reply With Quote
Old 11-07-2007, 06:48 PM
  #39  
ron_van_sommeren
 
ron_van_sommeren's Avatar
 
Join Date: Sep 2002
Location: Nijmegen/the NetherlandsNetherlands, NETHERLANDS
Posts: 416
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: CD-rom Brushless Outrunner Motors

15teeth + 20 magnetpoles for torque, 10 magnetpoles for speed.
Wind
ABCABCABCABCABC
ron_van_sommeren is offline  
Reply With Quote
Old 11-07-2007, 06:51 PM
  #40  
ron_van_sommeren
 
ron_van_sommeren's Avatar
 
Join Date: Sep 2002
Location: Nijmegen/the NetherlandsNetherlands, NETHERLANDS
Posts: 416
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: CD-rom Brushless Outrunner Motors

Several motors made from floppy drives:
http://www.rcgroups.com/forums/showthread.php?t=587208
ron_van_sommeren is offline  
Reply With Quote
Old 11-09-2007, 10:59 PM
  #41  
j.m.
Senior Member
Thread Starter
 
Join Date: Sep 2007
Location: Raleigh, NC
Posts: 2,622
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: CD-rom Brushless Outrunner Motors

Thanks.
j.m. is offline  
Reply With Quote
Old 11-11-2007, 09:22 PM
  #42  
j.m.
Senior Member
Thread Starter
 
Join Date: Sep 2007
Location: Raleigh, NC
Posts: 2,622
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: CD-rom Brushless Outrunner Motors

Any idea of wire size to get maybe 10 total turns per tooth?
j.m. is offline  
Reply With Quote
Old 11-11-2007, 09:57 PM
  #43  
jdetray
Senior Member
 
jdetray's Avatar
 
Join Date: Dec 2004
Location: Napoleon, OH
Posts: 1,617
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: CD-rom Brushless Outrunner Motors

Looking at the GoBrushless.com site, there is a reference to a 17.8mm stator with 9T of #24 wire, with the notation "easy to wind." So maybe a 10th turn could be squeezed in. If not, then #25 wire ought to do it.

- Jeff
jdetray is offline  
Reply With Quote
Old 11-12-2007, 09:01 PM
  #44  
j.m.
Senior Member
Thread Starter
 
Join Date: Sep 2007
Location: Raleigh, NC
Posts: 2,622
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: CD-rom Brushless Outrunner Motors

I already wound my 17.8. Now i'm looking to wind my 40.
j.m. is offline  
Reply With Quote

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


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service