Abstract
A reassessment is presented of the application of the two-reaction theory to unsaturated salient-pole machines. The study reveals that calculation of the airgap flux or voltage of the salient-pole machine by the two-reaction theory is far from agreement with the test results under unsaturated conditions. A method of representing an unsaturated salient-pole machine by a simple function is described. By the aid of this new method it is shown that the direct- and quadrature-axis magnetizing reactances of an unsaturated salient-pole machine are not the same as the slopes of the airgap lines of the respective magnetization characteristics.
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