Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 92
e positive brush has beenconsidered; the action at the negative brush is similar and neednot be considered separately. The theory applies to a drumwinding as well as to a ring winding, the only difference betweenthe two cases being in the shape of the coil, see Fig. 71. By the use of carbon brushes… … CHAPTER XIIARMATURE REACTION 75. The Cross-magnetizing Effect—In Fig. 93, diagram Ashows the distribution of the magnetic flux in a two-pole machinewhen the field coils are excited and no current is flowing in thearmature winding; the flux density is uniform under the pole faceso that the same…
Electrical engineering
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