"DoN. Nichols" wrote in message
...

Based on the other suggestions, I believe that it is likely an
internal fan, designed to keep it cool when running at low speeds, where
a fan on the motor's rotor and shaft would not turn fast enough to
cool things properly.


Wire a capacitors across the suspect windings in or c2c configuration and
spin the fan with a blast of compressed air while checking the leads voltage
with a voltmeter to see if voltage is generated.