Previous in Forum: DC Voltage Levels for Testing MV Cable   Next in Forum: Circuit to Amplify Speaker Sound
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
3 comments
Rate Comments: Nested
eltech
Power-User

Join Date: Mar 2011
Location: oz
Posts: 252
Good Answers: 10

2 Pole vs 4 Pole Motor

09/16/2011 2:25 AM

If power is proportional to speed x torque, then a motor with the same power have less torque for a 2 pole motor.It will therefore have less magnetising current, then why does a 2 pole motor have the same FLA has the 4 pole ,actually it has slightly more amps, one will think it will be less.
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#1

Re: 2 Pole vs 4 Pole Motor

09/16/2011 6:46 AM

It's running st trice the speed, so the frictional losses, like air resistance to the rotor spinning, will be mre. That costs amps.

__________________
 "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
pnaban
Guru

Join Date: Jun 2010
Location: srilanka
Posts: 2725
Good Answers: 5
#2

Re: 2 Pole vs 4 Pole Motor

09/16/2011 10:45 PM

Can you check from any reputed manufacturer and give the no-load and full-load amps of two motors of same hp/kw but different(2p/4p)number of poles?.

__________________
 pnaban
Register to Reply
JRaef
Guru
United States - Member - New Member Engineering Fields - Power Engineering - New Member

Join Date: Sep 2006
Location: California, USA, where the Godless live next door to God.
Posts: 4665
Good Answers: 804
#3

Re: 2 Pole vs 4 Pole Motor

09/17/2011 12:40 PM

Magnetizing current is only a small portion of the fixed losses.

__________________
 ** All I every really wanted to be, was... A LUMBERJACK!.**
Register to Reply
Register to Reply
Have a Different Question?
3 comments
Copy to Clipboard

Users who posted comments:

JRaef (1); pnaban (1); PWSlack (1)

Previous in Forum: DC Voltage Levels for Testing MV Cable   Next in Forum: Circuit to Amplify Speaker Sound

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Electrical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (100 right now)
Show Members
Advertisement