RE: Sync motor :-(

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "David Dean by way of Terry Fritz <twftesla-at-qwest-dot-net>" <deano-at-corridor-dot-net>

Hi,

Does the motor have a centrifugal switch? If it does,
and you failed to get it back together "just right",
(easy to do) it will cause the motor to run noisy and
to pull too much current (the start winding is never cut out
so the motor acts like two motors fighting each other) and
to get hot.

later
deano

> -----Original Message-----
> From: Tesla list [mailto:tesla-at-pupman-dot-com]
> Sent: Saturday, July 28, 2001 2:33 PM
> To: tesla-at-pupman-dot-com
> Subject: Sync motor :-(
>
>
> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <Kidd6488-at-aol-dot-com>
>
> Hello, everyone
>       I had a 1/3 HP, 1725 RPM motor sitting in my barn, just
> waiting to be
> synched. Plus with my dad having all the facilities at work to grind the
> flats, and cut a perfect disk, I thought I'd give SRSG a try...
> So I popped
> the thing apart and measured the distance of the pole on one side
> of the DP
> to the pole on the other side. It was .750" So my dad took it to
> work, and
> precision cut the flats .780" exactly 90º on the rotor. I put it back
> together, and turned it on. It was noticeably louder, and got hot fast. I
> taped a cardboard circle on it with first a dot, then a line drawn on it.
> With a fluorescent bulb, I could see them spinning very fast (this was at
> 10:30 when it was very dark). So I got out my RPM meter, and
> clocked it at
> 1625 RPM :-( . Then as it got hotter, I could hear the pitch go
> up and down,
> and so did the RPM. It was definitely not in sync. What could be
> wrong? The
> extra 30 thousandths he added couldn't have done this. I'd hate
> to guess how
> many amps it was drawing there at the end.
>
> ---------------------------------------
> Jonathon Reinhart
> hot-streamer-dot-com/jonathon
>
>