Voltage Irregularities in D-C. Generators

This paper enumerates the voltage irregularities which may occur in d-c. generators. It gives a description of these irregularities, the cause of their occurrence, the magnitude of their values, their effect on radio circuits, and states the problem encountered in their measurement. A method is described for the measurement of these voltage irregularities, by the use of an oscillograph, a blocking condenser, and a current transformer. A number of oscillograph records, illustrative of the voltage irregularities existent in various d-c. generators, is shown, and an analysis of the wave form made for each component of slow and fast ripple. These records were taken under various electrical and mechanical conditions of the generators. Comparisons between these records are made. Conclusions are drawn as to features desirable in d-c. generators.