Hi WAYNE.

31-Jul-03 09:50:00, WAYNE CHIRNSIDE wrote to JASEN BETTS


  -=> JASEN BETTS wrote to BEN RITCHEY <=-

 JB>> Hi BEN.

 JB>> 25-Jul-03 06:30:50, BEN RITCHEY wrote to ROY J. TELLASON

 BR>> I wonder if that's the same technology as A/C motors that use
 BR>> capacitors and how one would calculate the uF value?

 JB>> AFAIK motors with capacitors are split-phase induction motors ...
 JB>> dunno of the cap is doing phase conversion or power factor
 JB>> correction or both.

 WC> I _think_ they use it on a starter winding as without it they
 WC> won't start or won't know which direction to turn. The cap
 WC> introduces phase shift in a _start_ winding kicking the motor off
 WC> and running then as charged sort of just leaves the picture. I
 WC> _think_ that's how they work anyway.

sounds petty good, but with AC supplies capacitors don't get full and stop
conducting like they do with DC....

On the motors I've seen with starter windings there was a relay or
centrifugal switch that turned the starter off once the motor was
started.


 -=> Bye <=-

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