Abstract
An experimental model recently built to simulate magnetic flux and power loss distribution conditions in a large turbogenerator stator core is described. The model consists of a stack of laminated steel segments of around 0.5 cm depth. It is excited by a three-phase winding wound in the stator slots and arranged to allow easy replacement of stator segments. A plain disc stationary laminated steel "rotor" provides a low reluctance path across the machine. Results of various performance tests are presented and it is concluded that the pattern of flux distribution displayed by the model is of the correct general form. Typical results are included from measurements of local flux using small search coils and of loss using miniature thermocouples. The model should be valuable for studies of the effects of changes in various design parameters where its representation of local conditions is likely to be superior to currently available mathematical models.
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