DIYbanter - View Single Post - how do you run capacitor start ac motor in reverse

Mike_in_SD

(George) wrote in
:

On Sun, 06 Aug 2006 20:17:05 GMT, (Mike_in_SD)
wrote:

I have a couple of shop projects where I need to reverse a
110v capacitor start ac motor ..

whats the simplist way to do this ..

I did this when I was a kid, which is getting to be a long time ago.
IIRC, you have to reverse the relative phase of the start and run
windings.

My recollection is that I used a 4PDT switch; but, thinking about it
now, it's not clear why. It seems like you could just leave one winding
unswitched, and use a DPDT to reverse the other. Maybe I was using it
for an on/off switch, too? Maybe my mind is gone.

George

I know I have used 4pdt relays on dc motors, kind of like a
mechanical H bridge ... for some robot platforms I have build
but .. not sure how to apply here.

somebody suggested that if I take the plate off where the
main ac comes in that, there should be a diagram there to
describe reverse operation. I think that may be my best bet.

thanks for the reply
mike