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Permanent Magnet Alternator Rotor Fits Delco 10SI / 12SI alternators
Permanent Magnet Alternator Rotor Fits Delco 10SI / 12SI alternators
Permanent Magnet Rotor / Build Your Own PMA Today !!

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Permanent Magnet Rotor
List Price: $149.00
Price $129.00
You save $20.00!

Quantity in Stock:4
Availability:: Usually Ships in 24 to 48 Hours
Product Code: PMA-ROT

Now features our exclusive 303 Stainless Steel Shaft for the ultimate in corrosion protection and increased power output. The end of the shaft also features a standard thread size of 5/8 x 18 threads per inch and KEYWAY for easy adaptation to your project.

The rotor now has a 5mm x 5mm x 12mm keyway in the shaft in order to make custom adaptations easier to apply. Using the key will ensure that a counterclockwise rotation will not loosen the shaft nut. It will also make it easier to use a lovejoy, etc. The pulley and spacers still need to be sandwiched between the shaft nut and front spacer. Failure to do so will result in damage to the PMA.

Build your own PMA !!
Have you got an old Delco 10SI or 12SI alternator lying around in the garage?? This Permanent Magnet Rotor will convert it to a PMA alternator for use as a wind generator or whatever else you want. This is the same rotor that we put in our "DC series" alternators and we realize not everyone has the money to buy one of our complete units but at this price you can afford to give alternative energy a try by building your own PMA from the parts you have lying around in your garage. You could also pick up a used Delco 10SI or 12SI from a salvage yard for under $25.00 and have a go at it.

The rotor is the most Expensive and Labor Intensive part of a Permanent Magnet Alternator. We have tried all different types and combinations of magnet setups and feel we have come up with the best design on the market. Our N50 Grade Neodymium magnets are custom made to our specifications to provide the best performance with virtually no cogging effects. Cogging is the "thump-thump-thump" you feel when you turn the shaft of a Permanent Magnet Motor or Generator. It is similar to the feeling of holding a socket wrench in your hand, while turning the ratchet. "Homebuilt" or poorly designed rotors, such as those in the "SC" Super-Core PMA alternators you see sold on the net, tend to have such a strong cogging effect that they are not suitable for wind turbines because it takes to much force to start them turning and overcome the cogging. Our units on average only require 1.5 in/lbs to get them turning with no appreciable cogging.

  • Features Super Strong N50 grade Neodymium rare earth magnets
  • and a Stainless Steel shaft.
  • Built with ALL NEW COMPONENTS, Shaft, Pole Shoes (Claws) and Magnet
  • Shaft Nut and Lock Washer included
  • This is the same unit used in our "DC Series" Generators
  • Assembled unit is balanced and finished, ready to install.
Average Customer Review: 4 of 5 Total Reviews: 4 Write a review.

  0 of 1 people found the following review helpful:
Great Product July 12, 2010
Reviewer: mani from Detroit, MI United States  
Can I put Permanent Magnet Alternator Rotor in to my car..lol? The price is very good deal. Thank you windblue

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  4 of 4 people found the following review helpful:
PMA for renewable energy project May 23, 2010
Reviewer: Alan M. from Santa Clara, UT United States  
I am very pleased with this rotor and 512 stator matching.
I am not using the PMA on a wind tower, I have rigged it up with a motor drive and @ 1750 rpm it kicks out 51 volts (not sure on the amps #512 Stator graph shows it tops out @ 45a) I have it running off an Inverter to recharge the batteries that power same Inverter, Which provides power for my truck sleeper comfort system. (Portable heat-pump, and all the goodies one would find in a modern RV)

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  3 of 3 people found the following review helpful:
rotor July 6, 2009
Reviewer: joe goad from louisville, KY United States  
Big difference when I installed my new WindBlue rotor in my alternator. No load voltage jumped from 38.5 to 57.much lower start up too! wow!! If you want to build your own pma  get the WindBlue rotor it will wake up your alternator!!! Im very pleased with my WindBlue rotor!!!

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  11 of 11 people found the following review helpful:
PMA Alternator January 31, 2009
Reviewer: Nick Thomas from Fort Mill, South Carolina United States  
This is the best way ever to build your own alternator. I built one using WinBlue Magnet Rotor and it's the best. Thank you WinBlue for a great product.
PS: Very fast shipping to

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