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 158
se in tem-perature of the commutator in degrees centigrade will be in which U^ represents the total commutator losses, electrical andmechanical, in watts; Ak represents the radiating surface of thecommutator in square inches; and i?^ represents the peripheral speedof the commutator in feet per… … Fig. 145. Parallel Movement Hrvish Holder per minute, a figure which may be much improved upon -with ven-tilated armatures. Number and Size of Brushes. The total number of brush setsis usually fixed by the type of armature winding, as previously stated;but this criterion gives us no clew to the…
Electrical engineering
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