https://photos.google.com/share/AF1...?key=U1BkN3pJZzZHS0VRUTNPVy1oVmZJdDVGTFJGZjN3


I took this motor out of a drier and want to run it. I'm a newbie.

it has 3 wires

yellow: connected to the capacitor

brown: connected to the capacitor other end

black: not connected to anything

capacitor is 8mf

I measured:

yellow to black measures 40 ohms

brown to lack measures 40 ohms

yellow to brown measures 80 ohms

more photos here:

 

Well that shouldn't be a problem , particularly if you haven't removed it yet ..

Remove the motor and the capacitor from the machine , leave the wires connecting the two intact , then there should be two wires spare , these connect to the mains .

 

Well that shouldn't be a problem , particularly if you haven't removed it yet ..

Remove the motor and the capacitor from the machine , leave the wires connecting the two intact , then there should be two wires spare , these connect to the mains .

That's what I did. But I have 3 wires:

 

That appears to be a PSC motor where the coils are equal in order to supply L1 to the black and either L2 (or N) to ONE of the other Yellow-Brown conductors, this achieves reverse in a PSC motor.
Only in a dryer it normally does not need reverse?
Your measurements appear to confirm PSC of equal windings.
Max.

 

That appears to be a PSC motor where the coils are equal in order to supply L1 to the black and either L2 (or N) to ONE of the other Yellow-Brown conductors, this achieves reverse in a PSC motor.
Only in a dryer it normally does not need reverse?
Your measurements appear to confirm PSC of equal windings.
Max.

Thanks Max. Can you point me out to the correct wiring?

 

This is one method of using a SPDT SW with centre off to reverse a PSC motor.
Max.

 

Thank you. Do you mean I don't need to hook up anything to ground? Just black to one main and either yellow or brown to the other main?

 

Ground (Earth) conductor goes to the frame of the motor for safety reasons.
(not shown)!
Max.

 

Could it be this is a two speed motor?? Many spin dryers have a slow speed for start , then switch to full speed.

 

YES!
Thank you very much @Max. It worked.
@oz I tried out one of the windings and it worked. Haven't tried the other just yet but from what @Max said seems to me that you are correct.
This was the first motor I salvaged. Hope to put it to good use.

From what I've read, an induction should have some kind of a mechanism to start off the motor and another one to make the start winding stop working. I didn't see anything that might cause this start mechanism (if it indeed exists) to stop.

Thanks
Eli

 

The acronym PSC is Permanent Start Cap motor, so in this type of motor up to about 1/2hp the start cap and winding are permanently connected, i.e. no disconnection method once up to speed.
Typically achieved using a centrifugal switch.
Max.

 

Thank you @Max. was worried that I might have missed something.