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Re: [TCML] sync motor

On 2/16/21 7:37 AM, Tedd Dillard wrote:
Thank you Steve I also have that information and am planning on building
one that way. I was looking for feedback on performance as I have also
heard about difficulties. I am glad to hear from someone that has actual
satisfactory experience with the design.

On Tue, Feb 16, 2021, 10:27 AM Steve White <steve.white1@xxxxxxxxx> wrote:

I have a synchronous motor made that way and it works great. It has two
flats machined 180 degrees apart. You really need a milling machine to cut
the flats. My motor started as a standard 1/2 HP 3550 RPM induction motor.
For a 1750 RPM induction motor as a starting point you need to cut 4 flats
spaced 90 degrees apart. There are some guidelines buried in the archives
about how deep and where to make the cuts. I actually have some PDF and JPG
files of the guidelines but since we can't attach files I can't post them
on this board. I didn't create these files. These are files that I have
collected from various sources over the years. If you supply your E-Mail
address I can send them to you.

Steve White
Cedar Rapids, Iowa

There was a LOT of discussion about this on the list, say, 10 years ago?

There are some folks who actually did the flats *by hand* with a file, and it worked.

googling "site:pupman.com flats sync" turns up some hits..





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