Summary
After describing a method for determining experimentally the constants and a curve called the basic magnetsation curve of the general expedor phase advancer, a general expression for the voltage generated in the phase advancer when connected to an induction motor in any manner, is derived. The exact and approximate equivalent circuits of an induction motor-expedor phase advancer set are obtained from its general equations and an equation for its current locus involving only one of the several assumptions generally made, is derived in two ways. A method of predetermining the complete performance curves of the set from a knowledge of its no-load data is described and complete calculated current loci and performance curves of a 50 h.p. set are given for three cases. The equation for the exact current locus of the set is derived in two ways and it is shown that for practical purposes the difference between the exact and approximate loci is not considerable. The circuits, equations, etc., have been put in such a form that the results obtained from them may be easily applied to an induction motor working in conjunction with various other commutating devices.
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Rudra, J.J. Basic theory of the general expedor phase advancer. Proc. Indian Acad. Sci. (Math. Sci.) 1, 288–307 (1934). https://doi.org/10.1007/BF03035570
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DOI: https://doi.org/10.1007/BF03035570