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2. Centrifugal switch - Wikipedia

   en.wikipedia.org/wiki/Centrifugal_switch

   When the motor approaches its normal operating speed, centrifugal force overcomes the spring force and the weights swing out, raising the plate away from the electrical contacts. This allows the contacts to open and disconnects the starting winding from the power source; the motor then continues operating solely using its running winding .

3. Fan (machine) - Wikipedia

   en.wikipedia.org/wiki/Fan_(machine)

   Standalone fans are usually powered by an electric motor, often attached directly to the motor's output, with no gears or belts. The motor is either hidden in the fan's center hub or extends behind it. For big industrial fans, three-phase asynchronous motors are commonly used, may be placed near the fan, and drive it through a belt and pulleys.

4. Pump inducer - Wikipedia

   en.wikipedia.org/wiki/Pump_inducer

   An inducer is the axial inlet portion of a centrifugal pump rotor, the function of which is to raise the inlet head by an amount sufficient to prevent significant cavitation in the following pump stage. [1]

5. Induction regulator - Wikipedia

   en.wikipedia.org/wiki/Induction_regulator

   The three phase induction regulator can be regarded as a wound induction motor. The rotor is not allowed to turn freely and it can be mechanically shifted by means of a worm gear. The rest of the regulator's construction follows that of a wound rotor induction motor with a slotted three-phase stator and a wound three-phase rotor. Since the ...