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A New Equivalent Circuit Of A Salient-Pole Synchronous Machine And Its Phasor Interpretation, Said Ahmed-Zaid, Danyal Mohammadi, Ahmed M.A. Oteafy

Electrical and Computer Engineering Faculty Publications and Presentations

This paper examines a shortcoming of the classical phasor diagram of a salient-pole synchronous machine based on the well-established two-reaction theory. Unlike in the phasor diagram of a smooth-air-gap machine, it is not possible to readily identify the internally-developed electromagnetic power of a salient-pole synchronous machine from this phasor diagram. By defining new machine reactances, a single equivalent circuit of a salient-pole synchronous machine is proposed together with a phasor diagram where the internally-developed electromagnetic power is made apparent. The revised two-reaction theory is illustrated using the mathematical model of a two-phase salient-pole synchronous machine whose equations are manipulated using …