Practical applied electricity; a book in plain English, for the practical man. Theory, practical applications and examples (1911)
Moreton, David Penn, 1882- · Chicago, The Reilly & Britton co · leaf 198
EENT GENERATOR jg? parts, bearings, etc., as determined by a thermometer It isusually safe to operate a machine above these temperaturesfor a few hours, but an excessive heating of commutatorarmature, or field coils, islikely to injure and insome cases destroy the in-sulation. (c) The heat… … field Current Fig. 151 the magnetic circuit of a generator usually retains some of itsmagnetism and when the armature is revolved in this weakmagnetic field, there is a small e.m.f. induced which producesa current in the field windings. This current, if the windings are properly connected,will…
Electrical engineering
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