Institute of Electrical and Electronic Engineers (IEEE)
IEEE Transactions on Energy Conversion
This paper presents a closed-form analytical technique for analyzing surface PM machines equipped with fractional-slot concentrated windings. Since this class of winding configuration deviates significantly from conventional sinusoidal distributions, classical steady-state phasor or analytical techniques cannot be used to provide accurate results. The presented analytical model provides a fast and reliable method to analyze and compare candidate machine designs. Stator slotting effects are taken into consideration and a wide range of concentrated winding configurations can be analyzed. This technique is capable of analyzing the machine both below (constant-torque) and above (flux-weakening) base speed. Average torque, cogging torque, and ripple torque are all evaluated. Analytical results are verified using finite element analysis.
EL-Refaie, Ayman M.; Jahns, Thomas M.; and Novotny, Donald W., "Analysis Of Surface Permanent Magnet Machines with Fractional-Slot Concentrated Windings" (2006). Electrical and Computer Engineering Faculty Research and Publications. 658.
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