Rewind Stator Winding Alternator | Insulation Materials Needed

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SUMMARY

The discussion focuses on the necessary insulation materials for rewinding the stator winding of an automotive alternator. Key materials mentioned include electrical insulation fiber paper, fish paper, and Nomex-410 insulation paper, specifically in sizes like 20" x 20" x 0.01" and 10 mil thick. The process involves inserting a 'U' shaped section of insulation into each stator slot and using enamelled copper wire for the windings. Thermal setting insulation can be applied to secure the windings after completion.

PREREQUISITES
  • Understanding of automotive alternator components
  • Familiarity with winding techniques for electrical components
  • Knowledge of insulation materials and their properties
  • Experience with handling copper wire and thermal setting insulation
NEXT STEPS
  • Research the properties and applications of Nomex-410 insulation paper
  • Learn about the techniques for winding stator coils in alternators
  • Explore the use of thermal setting insulation in electrical applications
  • Investigate various types of electrical insulation fiber papers and their specifications
USEFUL FOR

Automotive technicians, electrical engineers, and hobbyists involved in alternator repair and rewinding projects will benefit from this discussion.

souky101
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I want to rewind the stator winding of an automotive alternator.
Want insulation materials I need for that ?

Thanks for help

Sam
 
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It will depend on how it was done previously.
You will probably need to put a 'U' shaped section of thin sheet insulation material into each slot of the stator.

Then wind rectangular coils that can be knocked into the 'U' slots progressively until all the coils are in place. If you can get copper wire with thermal setting insulation, you can heat the winding to glue it in place once you are happy with the windings.
 
As @Baluncore explained it depends on how it was done previously. However, I'll like to share some points. Usually, enamelled copper wire is used with the alternator. You simply need some sort of insulation paper or clothes for this purpose. You can use any of the following:
  1. Electrical Insulation Fiber Paper Fish Paper This usually comes in the size 20" x 20" x .01"
    s-l1600.jpg
  2. Nomex-410-Insulation-Paper-10mil-thick-0-25mm-5-25-034-w-continuous-sheet
    s-l1600.jpg
And here is the way you can insert in in:
F5O1H64GA1BGG0Z.MEDIUM.jpg

In a nutshell, you simply need an insulation foil for providing insulation.
 
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Thanks for your reply.
In the third photo I can see some kind of cloth material inserted in each slot to insulate the copper winding from the steal body.

What type of this cloth material used ?

Thanks for help.

Sam
 

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