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 216
ce connected in series withthe armature. If the resistance (Rx) be decreased, theremust be an increase in speed, the armature current (la) re-maining practically constant, in order that the effective e.m.f.(E — Ec) will be equal to the (LR) drop in the armaturecircuit. When all of the resistance… … Fig. 165 The field circuit of the motor must, of course, be closed whenit is being started in order that the armature conductorsmay cut lines of force and have a counter e.m.f. inducedin them, and also that the proper torque be generated tocause the armature to rotate. 216. Starting Boxes,…
Electrical engineering
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