Equivalent circuit model for pole-phase modulation induction machines

Equivalent circuit parameter expressions have been derived to account for electronic pole changing in pole-phase modulation (PPM) induction machines. Conventional expressions require a fixed number of electrical phases, and winding pole count to be equal to magnetic pole count, both of which are not always satisfied in PPM machines. The proposed model can describe machines with an arbitrary number of electrical inputs and pole count configurations. Generalized parameter expressions allow for the examination of high-level design trade-offs associated with machine geometry, winding design, inverter leg count, and electronic pole count selection in variable speed applications. Finite element models and experiments are used to validate the analytical framework and verify parameter variation during electronic pole adjustment.

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