Principles and practice of electrical engineering (1914)
Gray, Alexander, 1882-1921 · New York [etc.] McGraw-Hill Book Company, inc. · leaf 346
e flux which passes between ac.This is accomplished by splitting each pole as shown diagram-matically in Fig. 384 aud exciting each part separately. If thenthe excitation of the main pole M is unchanged, the flux threadingac will be unchanged, but the total flux threading ab may beincreased or… … Fig. 383.—Three-phase rotary con- Fig. «384.—Split-pole rotary con-verter, verter. Another method of changing from alternating to direct currentis described on page 357, the piece of apparatus by which thetransformation is made is called the mercury vapor converter. 354. Frequency Changers.—To…
Electrical engineering
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