Question: A three-phase two-pole winding is excited by balanced three-phase 60-Hz currents as described by Eqs. 4.23 to 4.25. Although the winding distribution has been designed

A three-phase two-pole winding is excited by balanced three-phase 60-Hz currents as described by Eqs. 4.23 to 4.25. Although the winding distribution has been designed to minimize harmonics, there remains some third and fifth spatial harmonics. Thus the phase-a mmf can be written as Fa = ia (A1 cos θa + A3 cos 3θa q + A5 cos 5θa) Similar expressions can be written for phases b (replace θa by θa - 120°) and c (replace θa by θa + 120°). Calculate the total three-phase mmf. What is the angular velocity and rotational direction of each component of the mmf?

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Fb and Fe Similarly we can write Fa ibA1 cos 0a 120 A3 cos 30 12... View full answer

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