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1. Calculate the coil pitches and indicate the slots into which the first coils should be placed for the following armature windings: (a) 36 slots, 4 poles; (b) 57 slots, four poles; (c) 76 slots, 6 poles; (d) 132 slots, 8 poles; (e) 270 slots, 10 poles.

1. Calculate the coil pitches and indicate the slots into which the first coils should be placed for the following armature windings: (a) 36 slots, 4 poles; (b) 57 slots, four poles; (c) 76 slots, 6 poles; (d) 132 slots, 8 poles; (e) 270 slots, 10 poles.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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1. Calculate the coil pitches and indicate the slots into which the first coils should be placed for the following armature windings: (a) 36 slots, 4 poles; (b) 57 slots, four poles; (c) 76 slots, 6 poles; (d) 132 slots, 8 poles; (e) 270 slots, 10 poles. 2. The armature of a 6-pole generator carries a total of 350 A. What current flows in each path if the winding is (a) triplex lap? (b) duplex wave? 3. he total armature current carried by a 50-hp, 4-pole, 230-V motor is 180 A. If the winding is wave, how much current is handled by each path and by each brush arm if there are (a) 4 brush arms? (b) 2 brush arms? 4. Determine the commutator pitches for the following wave-wound armatures: (a) 75 segments, 4 poles; (b) 93 segments, 4 poles; (C) 229 segments, 6 poles. 5. A 17-slot, 33-segment armature is wound simplex-wave for four poles. Calculate the coil and commutator pitches and specify whether or not there will be a "dead" element. 6. A 500-kW, 600-V, 10-pole generator has an armature with 108 slots, 324 commutator segments, and a simplex-lap winding with a total of 648 conductors. Calculate: (a) the no. of conductors per slot; (b) the no. of winding elements per coil; (c) the no. of turns per winding element. 7. How many equalizers are there in a 6-pole, 50% equalized armature in which there are 216 segments? To what three segments is the first equalizer connected? 8. Determine the coil and commutator pitches, and the number of parallel paths for a 72-slot, 288-segment, 6-pole frog-leg armature winding.
Transcribed Image Text:1. Calculate the coil pitches and indicate the slots into which the first coils should be placed for the following armature windings: (a) 36 slots, 4 poles; (b) 57 slots, four poles; (c) 76 slots, 6 poles; (d) 132 slots, 8 poles; (e) 270 slots, 10 poles. 2. The armature of a 6-pole generator carries a total of 350 A. What current flows in each path if the winding is (a) triplex lap? (b) duplex wave? 3. he total armature current carried by a 50-hp, 4-pole, 230-V motor is 180 A. If the winding is wave, how much current is handled by each path and by each brush arm if there are (a) 4 brush arms? (b) 2 brush arms? 4. Determine the commutator pitches for the following wave-wound armatures: (a) 75 segments, 4 poles; (b) 93 segments, 4 poles; (C) 229 segments, 6 poles. 5. A 17-slot, 33-segment armature is wound simplex-wave for four poles. Calculate the coil and commutator pitches and specify whether or not there will be a "dead" element. 6. A 500-kW, 600-V, 10-pole generator has an armature with 108 slots, 324 commutator segments, and a simplex-lap winding with a total of 648 conductors. Calculate: (a) the no. of conductors per slot; (b) the no. of winding elements per coil; (c) the no. of turns per winding element. 7. How many equalizers are there in a 6-pole, 50% equalized armature in which there are 216 segments? To what three segments is the first equalizer connected? 8. Determine the coil and commutator pitches, and the number of parallel paths for a 72-slot, 288-segment, 6-pole frog-leg armature winding.
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