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Discussion :: GATE EEE

  1. The separately excited dc motor in the figure below has a rated armature current of 20 A and a rated armature voltage of 150 V. An ideal chopper switching at 5 kHz is used to control the armature voltage. If La = 0.1 mH, Ra= 1Ω , neglecting armature reaction, the duty ratio of the chopper to obtain 50% of the rated torque at the rated speed and the rated field current is

    2. A.
    0.4
    B.
    0.5
    C.
    0.6
    D.
    0.7

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    Workspace

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    Answer : Option D

    Explanation :

    -NA-

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