Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1903)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 384
first set on the commutatorat the opposite ends of thediameter, in bipolar dynamos,or diametrically opposite. Thisis usually done by countingthe number of bars in the com-mutator and then properlydividing them. Suppose thata commutator has 20 bars, thetoe of the brush should thenbe set to the… … Fig. 353.—Armature Winding. 366 PRACTICAL ELECTRICITY. divided into four equal parts for a 4-pole machine, and so on.Suppose a commutator of a 4-pole dynamo to consist of 144segments, then the toes of the brushes would be set to theinsulation line between 144 and 1; 36 and 37 ; 72 and 73,and 108…
Electricity · Magnetism
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