TheBackShed.com

Home	JAQForum Ver 24.01
Log In or Join
Active Topics
Local Time 09:39 16 Aug 2025	Privacy Policy
Jump to

Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.

Forum Index : Windmills : What’s the best lowest cog motor around?

Author

Message

dvn8
Newbie

Joined: 04/01/2010
Location:
Posts: 10

Posted: 12:51pm 10 Jan 2010

Copy link to clipboard

Print this post

Just wondering if there are any good motors for generator that has the high output with a low torque output or no cog?

Which type of motor will give out the lowest cog, axial, permentant mag, or other type of motors?

Dupa

Newbie

Joined: 09/12/2009
Location: United States
Posts: 27

Posted: 03:33pm 10 Jan 2010

Copy link to clipboard

Print this post

I believe an AC servo motor has little to 0 cog.

I is a injenear

Perry

Senior Member

Joined: 19/11/2009
Location:
Posts: 190

Posted: 09:53pm 10 Jan 2010

Copy link to clipboard

Print this post

Axial flux PMA'a have zero cog.

Perry

KarlJ

Guru

Joined: 19/05/2008
Location: Australia
Posts: 1178

Posted: 11:45pm 10 Jan 2010

Copy link to clipboard

Print this post

Its almost irrelevant anyway, pole twisting reduces the cog on the f&P to almost nothing and they cost almost nothing.

AXFX =$1000++
AC servo motor = $$
7 Phase on F&P $100
(unless you have a spare 36pole magnet hub then free I guess)
P&P with poles twisted ~$30

If you're talking a mill big enough for either of these motors to make worthwhile output you need 3m+ blades

It all comes back to this simple problem
-in order to make power you need to have wind, if there isnt enough wind to overcome startup cog then there isnt enough wind to make any power of note.

Luck favours the well prepared

Print this page

To reply to this topic, you need to log in.