The Shop > Electronics & IC Programing
single phase motors.
DavidA:
vtsteam,
I'm trying to add a sketch of the wiring to the post.
I've measured the windings and get 26 Ohm for the red winding and 21 Ohm for the white winding. So by your reckoning the red one should be the start winding. But the capacitor is in series with the white winding.
The motor, in case anyone has a similar set-up, is a Clarke 800/4 1350 rpm 1HP .
I've managed to get the sketch as far as photobucket. just got to link to it.
Dave
vtsteam:
There are run capacitors and start capacitors, also a throw out switch. Also sometimes there are wires for reversing and different speeds, and colors are almost never standardized. It's hard to tell just from a word description. For instance when you measured resistance was the throw out switch engaged? Were the two windings therefore paralleled? Or are the switch and leads brought out.? etc.
DavidA:
Here's hoping this has worked.
DavidA:
vtsteam,
Looks as if our posts crossed.
I don't hear any throw-out switch operating. So I don't think there is one.
I'll just have to try various connections and see what happens.
Unless, as I mentioned above, someone else has already done the same thing to hte same motor.
Dave.
DavidA:
Bill,
...Essentially, the start/run capacitor is switched between the live and neutral - its other terminal is connected to the start winding.
This is starting to make more sense to me as I think about it. I am thinking that the winding with 21 Ohm reading (the white winding) is the start winding. So I will have to keep the capacitor connected to that one.
The new switch will be switching the capacitor between the live and the neutral supply.
Dave.
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