Single Phase Motors
For ceiling fans generally the single phase motor used is

Capacitor start and run type
Split phase type
Permanent capacitor type
Capacitor start type

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Single Phase Motors
If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then

motor will not carry the load
electrolytic capacitor will, in all probability, suffer break down
current drawn by the motor will be excessively high
motor will not come up to speed

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Single Phase Motors
The rotor slots, in an induction motor, are usually not quite parallel to the shaft because it

improves the power factor
helps the rotor teeth to remain under the stator teeth
improves the efficiency
helps in reducing the tendency of the rotor teeth to remain under the stator teeth

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Single Phase Motors
Hysteresis motor is particularly useful for high-quality record players and tape-recorders because

it can be easily manufactured in extremely small sizes of up to 1 W output
it is not subject to any magnetic or mechanical vibrations
it develops hysteresis torque which is extremely steady both in amplitude and phase
it revolves synchronously

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