Question
3-9 Assume the field distribution produced by the stator in the machine shown in Fig. P3-9 to be radially uniform. The magnitude ell' + ia N₂ ia @m S Fig. P3-9 Problem 3-9. Stator magnetic axis PROBLEMS 89 of the air-gap flux density is B,, the rotor length is l, and the rota- tional speed of the motor is @m (a) Plot the emf e induced in the coil as a function of for two values of i: 0 and 10 A. (b) In the position shown, the cur- rent i, in the coil 11' equals Ia. Calculate the torque acting on the coil in this position for two values of instantaneous speed @m: 0 and 100 rad/s.
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