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 220
peed. Such isthe case in street-car motors. The torque required is amaximum when the car is being started and the speed aminimum, and as the speed increases the torque decreases. Motors may then be divided into three classes, accordingto the character of the work to be performed, and they… … Fig. 169 series motor operated from a constant-potential line generallyfulfills the requirements for case (c). The only motor thatnaturally meets the requirements in case (a) is the seriesmotor operated on a constant-current circuit. 224. Construction of Motors.—The character of the worka motor is…
Electrical engineering
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