Existing graphical methods of Walker and Knight and Haddock require the plotting of a limacon and give only one point on the load caharacteristic. A simple adaptation of these is suggested which yields an easy and rapid method of deriving the entire load characteristic from open circuit to short circuit.
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References
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WalkerJ. H.‘Operating characteristics of salient-pole machines’, Proc. IEE, 100(II), pp. 13–24,(1953).
2.
KnightG. J., and HaddockL.‘An original method for predicting the terminal voltage of an alternator for fixed excitation by the two-axis theory’, Int. J. Elect. Enging. Educ., 14(4), pp. 371–79, (1977).
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SayM. G., Alternating Current Machines, Pitman, pp. 392–94, (1976).
