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ถามโจทย์ปัญหา => ถามโจทย์ปัญหาไฟฟ้าแม่เหล็ก => Topic started by: blue on June 15, 2008, 05:09:27 PM



Title: ถามโทย์ปัญหาเรื่อง rotating machine
Post by: blue on June 15, 2008, 05:09:27 PM
โจทย์เขาถามว่า
the rotating machine of fig has the following parameters
Lss=0.15H  Lrr=0.06H  Lsr= 0.08 cos ө  H
1. the rotor is driven at 3600 rpm. if the stator winding carries a current of 5 A(rms) at 60 Hz determine the instantaneous voltage and rms voltage induced in the rotor coil. determine the frequency of the rotor induced voltage.

2. Suppose the stator and rotor coils are connected in series and a current of 5 A(rms) at 60 Hz  is passed though them. determine the speeds at which the machine will produce an average torque. Also determine the maximum torque that the machine will produce at each speed.

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