High frequency apparatus, design, construction and practical application; a practical treatise for electrical engineers, electricans, physicians, students and experimenters (1920)
Curtis, Thomas Stanley · New York, Norman W. Henley publishing company · leaf 23
ation,we may say that the number of cycles per revolution willbe equal to the number of poles divided by 2. To use this,let us take the case of the four pole machine. Four divided by 2 is 2. Therefore, the machine will deliver twocycles to every complete revolution of the rotor. If thespeed is 1800… … Fig. 2.—A motor-gcneratur lor cl.angir.g direct current to alternating current current is in general use in the United States. Certainparts of the country still use 125 and 133-cycle currentsand in Canada the 25-cycle current is much in evidence. A change in the frequency of the current…
Electric apparatus and appliances
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