The standard manual of dynamos and practical application of dynamo-electric machinery (1915)
MacFadden, Carl K. [from old catalog], Ray, William D., [from old catalog] joint author · Chicago, Laird & Lee, inc. · leaf 41
s methods in vogue for energizing themwill now be taken up. It takes a current of electricity,passing around an iron core or center to make an electromagnet, the power of which will vary with the ampere 36 THEORY OF DYNAMOS. turns, or the product of the number of amperes passingand the number of… … FIGURE 16.—SERIES WOUND DYNAMO. to energize them, the plan of connections being shown infigure 15. Then it was seen that the current from thedynamo itself might be used to excite its own field mag-nets and owing to a slight amount of residual magnet-ism, which always remains in a piece of iron…
Electrical engineering · Electric machinery
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