Re: Is this motor synchronous?

From: 	Brent Turner[SMTP:bturner-at-apc-dot-net]
Reply To: 	70314-at-pupman-dot-com
Sent: 	Wednesday, December 24, 1997 1:01 AM
To: 	Tesla List
Subject: 	Re: Is this motor synchronous?

Gary -

  What you have is a synchronous motor, but not a salient-pole
synchronous motor. Your motor is RPM-locked to the line frequency
(1725-RPM motors aren't - they have what is called a 'slip' factor.)
but not indexed via discrete (salient) poles. The current draw should
be the first give-a-way. Hard-core salient-pole motors pull far more
current than a 1725-rpm motor of equivalent power.

- Brent

Tesla List wrote:
> From:   Gary Lau  23-Dec-1997 1018[SMTP:lau-at-hdecad.ENET.dec-dot-com]
> Sent:   Tuesday, December 23, 1997 8:29 AM
> To:     tesla-at-pupman-dot-com
> Cc:     lau-at-hdecad.ENET.dec-dot-com
> Subject:        Is this motor synchronous?


> Is it possible for a motor to be synchronous but at an arbitrary and
> variable phase?  Is this motor unsuitable for a sync RSG, or is my
> analysis technique flawed?
> Gary Lau
> Waltham, MA USA