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 240
e magnetizing coilsis dissipated in three ways; by: 1. Induction; 2. Radiation; 3. Convection. In the first instance, it passes through the copper and theinsulation, either to the external surface, whence it passes offby radiation and convection into the air, or to the magnet 220 HAWKINS… … Fig. 246.—Fort Wayne compound wound rectangular ventilated spool field coil. The seriesand shunt coils are wound side by side, ventilating passages being provided lengthwisethrough each coil and between the shunt and series coils as shown. Ventilation.—Sometimes provision is made for ventilationof…
Electrical engineering
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