I have been waiting on a return call from anaheim.  Sometimes when you get
a little off the beaten path folks can't help.

Anyway, I am considering replacing what I believe is a 0.800" x 0.875"
diameter 8 pole neodymium magnet(0.100" thick) with a ferrite, or other 8
pole magnet.

The ID of the coil is 0.830", which gives an airgap of 0.015".  I want to
open the airgap, and attempt to use my own magnetic design without totally
breaking the motor.  I am aware that this will hurt efficiency, but not
clear how much.  Also, I have been puzzling whether or not changing to 4
poles would help dealing with a larger airgap, although If I understand
correctly I would need to change to the 2000rpm motor to get equivalent
performance.


On Thu, May 22, 2014 at 5:15 PM, Dave Cole <linuxcncro...@gmail.com> wrote:

> You might be better off asking a question.
>
> Have you tried talking to Anaheim?   They are friendly.
>
> Dave
>
> On 5/22/2014 3:11 PM, Erik Friesen wrote:
> > Anyone on the list know someone knowledgeable about brushless motor
> design?
> >
> > I am attempting to replace a rotor on this motor
> > *BLY171S-24V-4000*<
> http://www.anaheimautomation.com/products/brushless/brushless-motor-item.php?sID=143&pt=i&tID=96&cID=22
> >
> > with a ferrite, or other magnet for a pump.  Its a long story, but I need
> > about 20 minutes with someone who really understands some things.
> >
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