AFCA Forums Home
Home Search search Menu menu Not logged in - Login | Register
AFCA Forums > Antique Fan Collectors Association > Pre-1950 (Antique) > Rotor bars vs rated stator cycle/amount of poles:

 Moderated by: Steve Cunningham, Stan Adams, Rod Rogers
New Topic Reply Printer Friendly
Rotor bars vs rated stator cycle/amount of poles:  Rate Topic 
AuthorPost
 Posted: Mon Mar 22nd, 2021 02:38 am
  PMQuoteReply
1st Post
Rob Duffy
AFCA Member


Joined: Fri Jun 27th, 2008
Location: USA
Status: 
Offline
Has anyone done any research regarding the amount of poles in a stator versus the amount of rotor bars in the rotor for that particular stator?

From my understanding, for example, a rotor from a 133 cycle motor that's designed to run at a similar speed compared to a 60 cycle 4 pole motor, would not function correctly in a 60 cycle 4 pole stator.

Back To Top PMQuoteReply  

 Posted: Mon Mar 22nd, 2021 07:06 pm
  PMQuoteReply
2nd Post
Jim Kovar
AFCA Member


Joined: Mon Feb 21st, 2011
Location:  Lincoln, Nebraska USA
Status: 
Offline
Hi, Rob.

Couldn't find any poop on
rotor bars to stator poles.

But did come across this...

https://books.google.com/books


Back To Top PMQuoteReply

 Posted: Mon Mar 22nd, 2021 08:21 pm
  PMQuoteReply
3rd Post
Steve Rockwell
AFCA Member


Joined: Tue Jun 23rd, 2015
Location:  
Status: 
Offline
        If it's any help.....





Back To Top PMQuoteReply  

 Posted: Sun Apr 4th, 2021 01:46 am
  PMQuoteReply
4th Post
Jim Kovar
AFCA Member


Joined: Mon Feb 21st, 2011
Location:  Lincoln, Nebraska USA
Status: 
Offline





Back To Top PMQuoteReply

 Posted: Sun Apr 4th, 2021 02:16 am
  PMQuoteReply
5th Post
Rob Duffy
AFCA Member


Joined: Fri Jun 27th, 2008
Location: USA
Status: 
Offline
Jim Kovar wrote:




This is a really good read, thank you!

Back To Top PMQuoteReply  

 Posted: Mon Apr 5th, 2021 09:01 am
  PMQuoteReply
6th Post
Rick Huckabee
AFCA Member


Joined: Mon Jun 9th, 2008
Location: Lufkin, Texas USA
Status: 
Offline
Emerson 6-pole Rotors have more bars than do the 4-pole . Using a 4-pole rotor in a 6-pole motor will result in excessive electrical noise when running. Start-up appears unaffected.

Back To Top PMQuoteReply

 Posted: Mon Apr 5th, 2021 11:58 am
  PMQuoteReply
7th Post
Michael Rathberger
AFCA Member


Joined: Tue Nov 15th, 2005
Location:  
Status: 
Offline
When the question came up I read through one of my old motor books from 1914, there was no formula for it. Then I had a question from a buddy about number of bars in a 21645 rotor, which was 19, which I found odd. Then I took a look at a 6wing tank v a 4 and the poles on the rotor, the 6 had a lot more although I never bothered counting them all. The book says that one -- the current through the windings or the rotor being pulled has to have a "lag," or run just a little behind the other for best efficiency.



I can only think the odd number has to do with the lag.

Last edited on Mon Apr 5th, 2021 01:36 pm by Michael Rathberger

Back To Top PMQuoteReply  

 Posted: Mon Apr 5th, 2021 08:04 pm
  PMQuoteReply
8th Post
Alex Rushing
AFCA Member


Joined: Thu Dec 14th, 2006
Location: Montgomery, Alabama USA
Status: 
Offline
Rick Huckabee wrote: Emerson 6-pole Rotors have more bars than do the 4-pole . Using a 4-pole rotor in a 6-pole motor will result in excessive electrical noise when running. Start-up appears unaffected.
Good info! Thanks!

I'd like to add I've experienced the inverse of that. I tried a 29668 6-pole motor rotor in a 27648 4-pole big motor. It made incredible growls starting, but was fairly smooth at speed. Tried, because my 27648 rotor has some notable wear.

Back To Top PMQuoteReply

Current time is 04:17 am  
AFCA Forums > Antique Fan Collectors Association > Pre-1950 (Antique) > Rotor bars vs rated stator cycle/amount of poles: Top



Beige Theme By: Di @ UltraBB
UltraBB 1.17 Copyright © 2007-2008 Data 1 Systems
Page processed in 0.1535 seconds (11% database + 89% PHP). 31 queries executed.