Single Phase Motors
The motor used for the compressors is

capacitor-start capacitor-run motor
reluctance motor
c. series motor
shaded pole motor

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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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