Previous in Forum: Busbar Conductor Spacing   Next in Forum: Why Are Almost All Directional Relays Using V-Connection PT?
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
8 comments
Rate this Comments: Nested
dar76
Active Contributor

Join Date: May 2011
Posts: 20

Motor Winding With Al Magnet Wire

10/04/2012 8:04 AM

Hello,

This motor stator is different it used Al magnet wire coated with golden color insulation as cu magnet wire, now we have only cu wire in stock how to convert this to cu magnet wire? some says the Al wire is only 5/8 compared to cu wire.

Here is the motor data: 3 phase Induction motor.

HP=1, Volt=460V, Hz=60Hz, Rpm=1740

Winding data :

No. of slots= 36 , Coils group= 6 , coils per group = 3 , coil pitch = 1-8, 1-10. 1-12

No. of turns = 164, 165, 166, wire size = 0.80mm diam. al magnet wire.,

I calculate to use 0.50mm diam. cu wire is it okay?

thank's
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Comments rated to be Good Answers:

These comments received enough positive ratings to make them "good answers".

Comments rated to be "almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, rate them!
Tornado
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21022
Good Answers: 795
#1

Re: Motor Winding With Al Magnet Wire

10/04/2012 10:07 PM

I suspect the 5/8 ratio applies to cross-sectional area rather than diameter.

__________________
 In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply Score 1 for Good Answer
Go to Next "Almost" Good Answer
3
Johny451
Power-User

Join Date: Aug 2008
Location: Melbourne, Australia
Posts: 476
Good Answers: 32
#2

Re: Motor Winding With Al Magnet Wire

10/04/2012 10:27 PM

Use Cu wire of the same diameter and use the same number of turns. The motor will be just a little more efficient than it was.

__________________
 johny451
Register to Reply Good Answer (Score 3)
No more Good Answers. Go to first "Almost" Good Answer
dar76
Active Contributor

Join Date: May 2011
Posts: 20
#3

Re: Motor Winding With Al Magnet Wire

10/05/2012 12:17 AM

I recalculate the 5/8 of 0.80mm diam. Al wire cross-sectional area is equal to 0.6324mm diam. cu wire cross-sectional area, so I decide to use 0.80mm cu wire and try the same no. of turn as original Al magnet wire.

Thank you,

dar76
Register to Reply Off Topic (Score 5)
Tornado
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21022
Good Answers: 795
#4

Re: Motor Winding With Al Magnet Wire

10/05/2012 12:28 AM

How about using the diameter of copper that has the same resistance as the original aluminum, and the same number of turns? (I'm not a motor rewinder, so this may be a guess.) There may also be a question of equal filling of the slots, which could be accommodated by varnish thickness.

__________________
 In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
dar76
Active Contributor

Join Date: May 2011
Posts: 20
#5
In reply to #4

Re: Motor Winding With Al Magnet Wire

10/05/2012 12:54 AM

The equivalent of 0.80mm diam is 0.635mm diam. so definitely with the same no. of turns as original wire the filling (total filling area) is lesser than the original.

Maybe it should be okay because the result are the same resistance. But how about the magnetic flux?
Register to Reply Off Topic (Score 6)
Tornado
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21022
Good Answers: 795
#6
In reply to #5

Re: Motor Winding With Al Magnet Wire

10/05/2012 1:03 AM

Are those two equivalent on the basis of ampacity, or resistance? Be sure of which (unless by coincidence it is both).

__________________
 In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
dar76
Active Contributor

Join Date: May 2011
Posts: 20
#7
In reply to #6

Re: Motor Winding With Al Magnet Wire

10/05/2012 1:46 AM

I refer from the magnet wire table they are almost the same resistance in ohms/1000ft. but i'm not sure with the ampacities of both wires.
Register to Reply Off Topic (Score 5)
rudy.leurs
Power-User
Belgium - Member - New Member

Join Date: May 2007
Location: Flanders (Belgium)
Posts: 343
Good Answers: 21
#8

Re: Motor Winding With Al Magnet Wire

10/05/2012 5:49 AM

Like johny says, use the same diameter in copper wire and the same number of turns.

Efficiency will be better and the starting torque will be higher, (start current will also increase, but for a small motor (1 HP) this is no problem)
Register to Reply Score 1 for Good Answer
No more "Almost" Good Answers.
Register to Reply 8 comments
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Comments rated to be Good Answers:

These comments received enough positive ratings to make them "good answers".

Comments rated to be "almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, rate them!
Copy to Clipboard

Users who posted comments:

dar76 (3); Johny451 (1); rudy.leurs (1); Tornado (3)

Previous in Forum: Busbar Conductor Spacing   Next in Forum: Why Are Almost All Directional Relays Using V-Connection PT?

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 (56 right now)
Show Members
Advertisement