Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 311
atinstant A for example the current in phase 1 = -\-Im that in phase 2 = — y and that in phase 3 is also = — -—• The resultant magnetic field produced by the windings atinstants A, B, C and D is shown in diagram S from which it maybe seen that, just as in the case of the two-phase machine,…
Electrical engineering
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