Stray losses in large synchronous machines

The results of an investigation of the components of stray losses in large salient pole synchronous machines are presented. Stray losses are caused by the magnetic leakage and fringing flux in the rotating machine, and their prediction is subject to uncertainties in the machine design. A 750 HP experimental machine has been designed, constructed, and extensively instrumented and tested for direct measurement of the loss components. The nature and distribution of the stray losses in various parts of the machine are described.<
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