Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 74
\*F /a^B_ Fig. 61.—Gramme ring winding. they are carried around when the core is driven by a prime mover;the lines of force still pass from N to S and do not rotate with thecore. When this construction is used it is found necessary tolaminate the core for the reason given in art. 62, page 55.…
Electrical engineering
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