Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 233
ed to a minimum by castwelding. The core is slotted parallel with the shaft to prevent, as far as possible, the dis-tortion of the magnetic field, especially on heavy overloads. FIELD MAGNETS 213 Ques. What mode of construction is adopted to reducethe reluctance of the magnetic circuit when… … Fig. 236.—Fort Wayne one piece frame with cast welded combined cores and pole pieces.In any electrical apparatus a magnetic circuit of low reluctance requires less energy tomaintain a given flux than one having a comparatively high reluctance. To reduce thisto a minimum the pole pieces and cores…
Electrical engineering
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