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Successfully rewound a 4 pole braided BMY stator  Rate Topic 
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 Posted: Sat Aug 10th, 2019 04:21 am
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Chris Winters
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Ok a bit of a brag moment. I have never rewound a stator before and came into this 1911/12 BMY and the stator was burnt. It had the 2 coils of resistance wire which are impossible to replace. 

Since the resistance was not available I was able to use a capacitor and successfully completed the job today!!

Big thanks to Mike Crenshaw on an old post where he posted a diagram. I was able to cross check my diagramming and make it easier to connect everything using his diagram. 

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 Posted: Sat Aug 10th, 2019 04:25 am
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Chris Winters
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Some photos






















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 Posted: Sat Aug 10th, 2019 04:28 am
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Chris Winters
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Quick addition. Since the capacitor doesnt just fit nicely in the base of the BMY base neck I was able to fit where it is in the pic and rather than solder it between wires I added terminals and 2 posts where head wire can connect and the other post a jumper running to the speed points on bottom of switch. 

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 Posted: Sat Aug 10th, 2019 11:37 am
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Geoff Dunaway
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That is an awesome feat  :shock:  . U may have stumbled onto a specialty new vocation , part time or otherwise. What size capacitor did you use to replace the resistance coils ??? 1st time I've seen that done. :up:

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 Posted: Sat Aug 10th, 2019 12:47 pm
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Derek Warnecke
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Very cool! You essentially re-engineered the motor design. Curious how much more efficient it runs as a PSC motor.

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 Posted: Sat Aug 10th, 2019 02:15 pm
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Chris Winters
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Geoff I used a 10 uf capacitor 

Last edited on Tue Aug 13th, 2019 09:24 pm by Chris Winters

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 Posted: Sat Aug 10th, 2019 02:18 pm
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Chris Winters
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Derek I put it all together last night and ran for over an hour. It only got Luke warm not even close to hot. I'll hook up to killawatt to see what it draws sometime today. Not sure how much more efficient but I'm stoked it works!

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 Posted: Tue Aug 13th, 2019 09:25 pm
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Chris Winters
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I hooked up to killawatt and amps are  .32 amps low .43 amps medium .59 amps high no blades 

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 Posted: Tue Aug 13th, 2019 09:59 pm
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Chris Winters
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Derek Warnecke wrote: Very cool! You essentially re-engineered the motor design. Curious how much more efficient it runs as a PSC motor.Not sure what a bmy usually pulls but amps are  .32 amps low .43 amps medium .59 amps high 

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 Posted: Wed Aug 14th, 2019 04:25 am
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Richard Daugird
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Looks like nice work!

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 Posted: Wed Aug 14th, 2019 06:39 am
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Don Tener
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Chris do you still have the old wire from that motor? If so I would really like to have the old resistance wire out of it.

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 Posted: Wed Aug 14th, 2019 01:12 pm
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Chris Winters
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Don Tener wrote: Chris do you still have the old wire from that motor? If so I would really like to have the old resistance wire out of it.
I have a few strands I can send you. I'll PM you.

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