Electrical machinery; a practical study course on installation, operation and maintenance (1921)
Annett, Fred Anzley · New York [etc.] McGraw-Hill book company · leaf 257
FiG. 251 Fic;. 252 … Fig. 253 FiQ. 254 Figs. 251 to 254.—Shows magnptic flux distribution in direct-current machine. ing load on the motor the distribution of the field from themain ])olos will l)e changing. With the flux uniformly dis-tributed, as in Fijjj. 251. tlie correct position of tlie bnisheswould be as…
Electric machinery
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