Re: AC motor speed control question

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

Original poster: Terry Fritz <teslalist-at-twfpowerelectronics-dot-com>

Hi Micheal,

At 01:19 PM 10/17/2004, you wrote:
>Hi all,
>
>I accidently sent a blank email as my first post ever
>to this group.  My apologies.

No problem.  The server must have caught it since I never saw it (I am the 
moderator too ;-))  I "try" to catch the goofs and such ;-)


>I'm building an SRSG, and want to make a speed
>controller circuit for my AC motor.

You probably mean a dwell angle controller like John Freau "invented".


>What I've been reading is that there's a danger of
>kickback spikes when trying to vary AC current with
>something like a variac.  There're a lot of references
>out there to a motor speed control circuit on John
>Freau's site, but the link no longer exists.  I'm
>wondering if anyone knows of a good way (and/or
>schematic) to safely vary the speed of an AC motor.

John's site is alive and well at:

http://hometown.aol-dot-com/futuret/page3.html

If you add the fuse and start it at zero there should be no problem.

Cheers,

         Terry



>thanks,
>Michael Curtiss