Re: SRSG phase controller

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

Original poster: "by way of Terry Fritz <twftesla-at-uswest-dot-net>" <FutureT-at-aol-dot-com>

In a message dated 4/18/01 9:48:18 AM Eastern Daylight Time, tesla-at-pupman-dot-com 
writes:

> Original poster: "Steve White by way of Terry Fritz <twftesla-at-uswest-dot-net>" <
> slwhite-at-zeus.ia-dot-net>
>  
>  I have been following the posts concerning the design of SRSG phase
>  controllers. One of the major concerns, at least for larger motors, 
appears 
> to
>  be the self-breaking action of the motor upon spin down. Could this not be
>  prevented through the use of a double-pole switch to completely remove the
>  phase control circuitry from the motor when it is turned off? One of the 
> switch
>  poles would break the circuit from the 120 volt power while the other 
switch
>  pole would simultaneously break the circuit from the phase controller to 
the
>  motor. This would prevent any self-breaking action. Comments?
>  

Steve,

Yes, such a switch, or perhaps a relay would be a good idea
if a large motor shows dangerous self-braking tendencies.

Johnn freau