Proving Rotation on a Rewind

[Mark Olson]

This is a Westy, so CCW, or CWLE. I am making and breaking the centrifugal switch leads.

 

 

[Bryan Eshenbaugh]

Thanks for posting this, Mark. I have added this step as a “CHECK” after I solder the stator connections. Easy to address any issues (if needed) before the stator is buttoned up and installed. 👍

[Darwin Costello]

Thank you Mark!  Should save a number of in and outs of the stator for me.  

[Marc Sova]

I’d “like” this but I have no idea what this voodoo is I’m watching lol. 

[Mark Olson]

44 minutes ago, Marc Sova said:

I’d “like” this but I have no idea what this voodoo is I’m watching lol. 

Hi Marc,

No voodoo involved. A single phase induction motor will not self start, therefore start windings are incorporated into the motor to cause the rotor to turn in the correct direction of rotation. The motor in this case has a centrifugal switch that opens the start winding circuit once the motor reaches speed. Other single phase induction motors use a capacitor or a choke to energize the start winding. In any case, the direction of rotation must be proved when the start windings and run windings are connected, otherwise there is a 50/50 chance that it will be correct (or not). The connection in question is what end of either winding is wired to be common. A metallic, non-magnetic, cylindrical object is hung in the rotating magnetic field to indicate the direction of rotation. Care must still be exercised, as the direction of rotation is relative to which end of the shaft is being viewed. If a stator is put in wrong side front, the motor will turn backwards and the wires will come out the wrong end. It is standard practice to call the direction of rotation relative to the wire side, or lead end, CW for clockwise, CCW for counter-clockwise, LE for lead end, OLE for opposite lead end, therefore, CWLE is CCWOLE and CCWLE is CWOLE

Edited February 17 by Mark Olson

[Marc Sova]

10 minutes ago, Mark Olson said:

Hi Marc,

No voodoo involved. A single phase induction motor will not self start, therefore start windings are incorporated into the motor to cause the rotor to turn in the correct direction of rotation. The motor in this case has a centrifugal switch that opens the start winding circuit once the motor reaches speed. Other single phase induction motors use a capacitor or a choke to energize the start winding. In any case, the direction of rotation must be proved when the start windings and run windings are connected, otherwise there is a 50/50 chance that it will be correct (or not). The connection in question is what end of either winding is wired to be common. A metallic, non-magnetic, cylindrical object is hung in the rotating magnetic field to indicate the direction of rotation. Care must still be exercised, as the direction of rotation is relative to which end of the shaft is being viewed. If a stator is put in wrong side front, the motor will turn backwards and the wires will come out the wrong end.

ahhhhhh. Totally makes sense. Thanks for the perfect explaination 

[Mark Olson]

2 minutes ago, Marc Sova said:

ahhhhhh. Totally makes sense. Thanks for the perfect explaination 

I appended further explaination

[Marc Sova]

10 minutes ago, Mark Olson said:

I appended further explaination

Thanks. Yeah I grasped CCW but that was about it. So….that further explanation helps.