《THE INDUCTANCE COEFFICIENTS OF A SALIENT-POLE ALTERNATOR IN》.pdf

621.313.322.013.2 The Institution of Electrical Engineers Paper No. 3587 S June 1961 THE INDUCTANCE COEFFICIENTS OF A SALIENT-POLE ALTERNATOR IN RELATION TO THE TWO-AXIS THEORY By Professor G. W. CARTER, M.A., Member, W. I. LEACH, M.Sc, Graduate, and J. SUDWORTH, M.Sc, Student. (The paper was first received \9th November, 1960, and in revised form 21th February, 1961.) SUMMARY p Q, p2 = First two coefficients in p(a + #). The simplicity of the machine equations in their two-axis form q — Number of slots per pole per phase. depends upon a certain relation between the inductance coefficients ra — Resistance of armature phase. being satisfied. The condition is likely to be fulfilled in a machine having rc = Effective resistance of armature phase at a uniform air-gap, but in a salient-pole machine its fulfilment is open to standstill. doubt. The paper contains a theoretical and experimental study of rf = Resistance of field winding. the question: the experimental aspect has