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- · New York, T. Audel · leaf 239
t. 658 HAWKINS ELECTRICITY Brushes heat sometimes due to too much friction. They should notpress against the commutator more than is necessan. for good contact. Ques. Give some causes for heating of armature. Ans. Eddy currents; moisture; short circuits; unequalstrength of magnetic poles; operation… … Fig. 729.—Eck Manchester type motor. It is a ver\ small size unit and is designed for specialpurposes where very little room is available. The motor occupies a space of 2 J^ X 4 J^between bearings and develops A horse power at 2.000 R. P. M. The frame of this motoris miade of high permeability…
Electrical engineering
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