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 227
the shaftupon which the pulley (P) ismounted. When the brake isin use, the outer end of thearm (A) rests upon the platform of a pair of scales. Thetorque exerted by the armature in pound-feet is equal to thenet reading of the scales in pounds multiplied by the hori-zontal distance (L), in feet,… … Fig. 179 (120) (121) or h.p. 27r X W X L X r.p.m. 33 000 (122) The input, of course, will be in electrical units and eitherthe output or input must be changed before equation (119)can be used in calculating the efficiency. DIRECT-CUEKENT MOTORS 217 [Note.—The dead weight of the brake must always be…
Electrical engineering
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