Electrical machinery; a practical study course on installation, operation and maintenance (1921)
Annett, Fred Anzley · New York [etc.] McGraw-Hill book company · leaf 219
gsare in opposition when the load is thrown on, the voltage willdecrease very rapidly as the load increases, owing to thedemagnetizing effects of the series-field winding. It may be possible to cross the armature connection insteadof the field. If this can be done, the machine will come up… … Fig. 220.—Same as Fig. 219, with brushes shifted 60 degrees. The best solution of the problem is obtained by shifting thebrushes from one neutral position to the next, which meansthat the brushes Avill be shifted 90 dcg. on a four-pole machine,60 deg. on a six-pole machine, etc. A com})arison of…
Electric machinery
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
