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2. Synchronous motor - Wikipedia

   en.wikipedia.org/wiki/Synchronous_motor

   Small synchronous motor with integral stepdown gear from a microwave oven. A synchronous electric motor is an AC electric motor in which, at steady state, [1] the rotation of the shaft is synchronized with the frequency of the supply current; the rotation period is exactly equal to an integer number of AC cycles.

3. Squirrel-cage rotor - Wikipedia

   en.wikipedia.org/wiki/Squirrel-cage_rotor

   The motor rotor shape is a cylinder mounted on a shaft. Internally it contains longitudinal conductive bars (usually made of aluminium or copper) set into grooves and connected at both ends by shorting rings forming a cage-like shape. The name is derived from the similarity between this rings-and-bars winding and a squirrel cage.

4. Circle diagram - Wikipedia

   en.wikipedia.org/wiki/Circle_diagram

   The circle diagram can be drawn for alternators, synchronous motors, transformers, induction motors. The Heyland diagram is an approximate representation of a circle diagram applied to induction motors, which assumes that stator input voltage, rotor resistance and rotor reactance are constant and stator resistance and core loss are zero.

5. Rotor (electric) - Wikipedia

   en.wikipedia.org/wiki/Rotor_(electric)

   A selection of various types of rotors Rotor from Hoover Dam generator. The rotor is a moving component of an electromagnetic system in the electric motor, electric generator, or alternator. Its rotation is due to the interaction between the windings and magnetic fields which produces a torque around the rotor's axis. [1]

6. Rotary phase converter - Wikipedia

   en.wikipedia.org/wiki/Rotary_phase_converter

   He created an electric machine called a synchronous phase converter, which was a single-phase synchronous motor and a three-phase synchronous generator with common stator and rotor. It had two independent windings: The outer winding is a single-phase synchronous motor. The motor takes the power from the overhead line.

7. Superconducting electric machine - Wikipedia

   en.wikipedia.org/wiki/Superconducting_electric...

   A superconducting rotor does not have the inherent damping of a conventional rotor. Its speed may hunt or oscillate around its synchronous speed. Motor bearings need to be able to withstand cold or need to be insulated from the cold rotor. As a synchronous motor, electronic control is essential for practical operation.