Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 157
BeTipheTQl 5peedofCoTnmutatoT in Feet per Min. Fig. 143. Curves Showing Average Friction Loss per SquareInch of Brush Contact at Various Speeds and Brush Tensions Dividing by 33,000 changes this value into horse-power, and multi-plying by 746 converts the result thus obtained into watts. … Peripheral Speed of Commutator in Ft per Min Fig. 144. Curves Showing Average Coefficient of Frictionand Brush-Friction Loss for Different Grades of Brushesat Various Commutator Speeds, with Brush Tension of1 lb. per Square Inch Example. Taking the same machine as just above mentioned, let us…
Electrical engineering
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