Question: ( 8 ' ) Problem 3 . A 4 - pole synchronous motor is fed with 4 0 0 - H z three - phase

(8') Problem 3.
A 4-pole synchronous motor is fed with 400-Hz three-phase currents.
(2') What is the synchronous frequency fs in Hz ?
(4') What is the mechanical speed of the rotating magnetic field produced by the stator currents in rpm and rad/s?
(2') What is the mechanical speed of the rotor in rpm and rad/s?
( 8 ' ) Problem 3 . A 4 - pole synchronous motor

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