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 245
hat the commutator shall have about.464 segments, and as each segment plus the necessary insulationcannot be less than about 0.2 inch wide at the face of the armature,the periphery of the commutator must be at least 464 X 0.2 = 92.8inches long. That is, the diameter should be about 92.8 -i- rr =… … ^.a„Z3- 215 206 DIRECT-CURRENT DYNAMOS Allowing 40 amperes per square inch of brush contact, andassuming that a brush covers 3 segments, we have for the net lengthof the commutator, parallel to the shaft, I - ^5 =625in ^-3X0.2X40 ^•^* each brush set collecting 150 amperes, as there are 4 pairs of…
Electrical engineering
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
