shaded pole motor

Compare the resistivity of copper with that of silicon steel.

Still even if the resistivity of Cu is less than steel... a short circuit still exists.. or is this short circuit current negligible.... after all the once the rotor is rotating shaded pole is not really doing anything...I think..

Of course it's a short circuit. That's the idea. No, the current is not negligible. Yes, the shaded pole is always in there, doing it's thing.

The best way to learn is to actually get a shaded pole motor and play with it. tead it apart. Run it a bit and check the temperature of the salient poles with your finger. You can usually find something with a shaded pole motor at a yard sale or in the Good Will for perhaps $2.

The shaded pole winding can be considered a shorted transformer secondary winding that has only a small part of the magnetic field for a core field. This attenuates the magnetic field into the rotor at the shaded pole location. This reduced field at one location is how a single phase motor starts to rotate. With this winding being a short circuit itself and the "output" of a transformer, connecting this wire to any metal surface will not effect anything.

porky2009;do you know how to reverse this motor?

Yes I do... why do you ask ?

How do you reverse this motor? I have no idea. The ones I have downstairs won't reverse start.

This motor is not reversible as you can call it Hadwired HARD-BUILT.

The poles are pre-cut & wound. Poles' rotation is fixed

Actually you can reverse it... just rotate the stator ...

Mine won't.

Sorry !

It is not !!!

Only a special design for reversible is required. Even Capacitor-split-wound fan motors are not reversed just by rotating it in reverse direction; but the connectio to capacitor have to be changed to other end.

See two sets of windings & Shaded poles

here also .....

I think it is sufficient.

These type of motors has a US patent reserved.

Actually nowhere it is mentioned, but physically the the Shaded-pole-coil is insulted as it is of insulated copper wire & welded at a point which is on outer side. More over the stator is itself insulated.