Re: SRSG motor modification

[FutureT-at-aol-dot-com (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

In a message dated 8/10/00 12:11:08 PM Pacific Daylight Time, 
tesla-at-pupman-dot-com writes:

> 
>  With regard to the capacitor, as you say, it phase shifts the current in 
the
>  secondary windings.  This creates a rotating magnetic field which is key to
>  starting the motor, but if left connected also gives increased torque 
across
>  the whole range of speeds.  The optimum value of capacitor is one which
>  phase shifts the second winding by 90degrees relative to the first, and the
>  calculation of this value is very similar to the way PFC capacitors are
>  calculated (i.e. balancing the impedance of the winding against the
>  impedance of the capacitor).  
>  
>  Colin.

To Dave?

Some motors will not tolerate having the cap in place during
operation, they are for starting only.  Other motors need the
cap for better torque.   It depends on the type of motor, so this 
is maybe another thing to consider.

John Freau