Principles of Electricity and Electromagnetism |
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Page 387
... armature rotates is produced by a current if flowing through the field coils which are wound on the pole pieces ... armature rotates . The reluctance of this gap is reduced by winding the armature on a steel drum with only a small ...
... armature rotates is produced by a current if flowing through the field coils which are wound on the pole pieces ... armature rotates . The reluctance of this gap is reduced by winding the armature on a steel drum with only a small ...
Page 396
... armature circuit . Owing to the mechanical inertia of the rotating parts , the back emf . is not established at once , and while the motor is getting up to speed , an excessive current would be drawn by the armature windings . The ...
... armature circuit . Owing to the mechanical inertia of the rotating parts , the back emf . is not established at once , and while the motor is getting up to speed , an excessive current would be drawn by the armature windings . The ...
Page 418
... armature . 2. The drum armature of a two - pole generator has 12 coils of 20 turns apiece . Its effective length is 0.167 m . and its effective radius is 0.05 m . If it rotates in a region of uniform induction of 1 weber per square ...
... armature . 2. The drum armature of a two - pole generator has 12 coils of 20 turns apiece . Its effective length is 0.167 m . and its effective radius is 0.05 m . If it rotates in a region of uniform induction of 1 weber per square ...
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angle antenna applied approximately assumed atom axis becomes calculated capacity carrying cell characteristic charge circuit closed coil component condition conducting conductor connected considered constant curve density depends determined dielectric difference direction discharge discussion distance effective electric electrons element energy equal equation evident expression factor field flow flux force frequency function galvanometer given grid hence impedance important increases indicated induction integral ions known length limited linear load losses magnetic magnetic field magnitude maximum means measured mechanical metal meter method negative normal obtained oscillations parallel path period phase placed plate positive potential present produced proportional quantities radius ratio reduced region relation represents resistance result rotation seen separation Show shown simple solution space surface temperature terminals transformer tube unit vector volts volume wave wire written zero