Re: OT: help with motor run capacitor sizing

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: <a1accounting@xxxxxxxxxxxxx>

Hi David,

I don't  think anyone replied to you so.

There is probably no one formula is it would be dependent on the L R 
ratio of your winding.

You could try putting a diode in series with each winding. The idea 
being that each winding is powered by alternative half cycles. You 
may have to do this at a lower supply voltage because the L of the 
windings will not limit the current.

Bob



>
> From: "Tesla list" <tesla@xxxxxxxxxx>
> Date: 2006/06/18 Sun AM 12:41:02 EDT
> To: tesla@xxxxxxxxxx
> Subject: OT:  help with motor run capacitor sizing
>
> Original poster: David Speck <dave@xxxxxxxxxxxxxxxx>
>
> Terry,
>
> May I ask the EE types on the list for a little help with a not 
quite TC item.
>
> I have a number of two coil motors, some of them steppers, that I
> would like to use as simple AC motors by wiring them as  capacitor
> run motors.  One winding would run directly across the power supply,
> and the other winding would run in series with  an AC cap to provide
> a phase shift.
> Is there a formula that would suggest the optimum run capacitor value
> based on the inductance of the windings, or the current draw through
> one winding at their rated voltage?
>
> Thanks in advance.
>
> Dave
>
>
>