Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 281
motor slows down and stops. The maximum output is generally more than twice the normaloutput of the machine as fixed by the heating of the windings. 284. Operation of a Synchronous Motor when Under- andOverexcited.—In diagram B, Fig. 296, the excitation of themotor M is such that Em = Eg. Two other… … ABCFig. 296.—Effect of excitation on the power factor of a synchronous motor. increase with the excitation and must now be greater than Eg.In the latter case the motor is underexcited and Em must be lessthan Eg. The load on the motor however is unchanged so thatEgI cos a is constant. It is…
Electrical engineering
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