Word list: armature, between, brushes, clockwise, commutator, currents, direction, distortion, increase, induces, inline, interpoles, main-field, neutral-plane, power

Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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Question 12

The following sequential statements, when completed, describe armature reaction in a DC generator. Complete each statement by inserting the appropriate word from among those provided in the word list below.

Word list:
armature, between, brushes, clockwise, commutator, currents, direction, distortion, increase, induces, inline, interpoles, main-field, neutral-plane, power, rotating, rotation, slip-rings, slow-down, sparking, speed, torque, voltage.

  • Armature reaction is the __________________ of the air gap flux that results from the interaction of the magnetic field created by _________________ in the armature conductors with uniform magnetic field of the __________________ winding.
  • Armature reaction results in pole tip saturation and a shift in the ________________, which lies ________________ the main field poles at no-load.
  • In generators this shift in the neutral plane is in the direction of _________________.
  • The effects of armature reaction can be reduced by equipping the DC machine with _________________ connected in series with the _______________, or by physically shifting the position of the __________________.
  • If this is not done _______________ will occur at the brushes and the generator output ________________ will be reduced.
  • Prolonged operation in this state can lead to sustained damage to the brushes and _________________.
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