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Unformatted text preview: winding. a) Draw the developed diagram for the bphase MMF. (10 pts) b) How many poles does this machine have? Explain briefly. (5 pts) c) Based upon your understanding of where would you wrap a coil such that you obtain the maximum electric field due to timechanging current in the bphase winding? Explain briefly. Draw the coil on the figure and label it maximum E coil. (5 pts) 4. A 3phase machine has the stator windings energized such that , , . You run around the stator counterclockwise at 45 rad/s. As you are running, you always observe the peak airgap flux density of 1 T. Plot the flux density you would see if you stopped and held yourself fixed at that position on the stator over 1 electrical cycle of time ( s). (10 pts) E t d d B = i as 90 t ( 29 cos = i bs 90 t 2 3 cos = i cs 90 t 2 3+ cos = 2 90...
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 Fall '08
 Staff
 Volt

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