Abstract
The arrangement of either distributed or concentrated windings in slots around the air gap of AC machines represents a crucial design issue, in so far as it deeply affects their features. This statement is much more critical in fractional-slot concentrated winding permanent magnet synchronous machines, also named fractional-slot permanent magnet machines (FSPMMs). These are characterized by fractional slot per pole and per phase lower than unity, resulting in dense harmonic contents of the armature MMF with a number of pole pairs lower than the field one. This chapter is aimed at the arrangement of the armature winding of FSPMMs, which is achieved considering the star of slots approach. Following the winding arrangement, the star of slots is used for the investigation of the back-EMF harmonic content as well as for the determination of the winding factors of the fundamental and harmonic backs-EMFs. Finally a case study is treated with emphasis on the MMF spatial repartition and harmonic content.
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Masmoudi, A. (2019). Fractional-Slot Concentrated Windings: Design and Analysis. In: Design and Electromagnetic Feature Analysis of AC Rotating Machines. SpringerBriefs in Electrical and Computer Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-0920-5_3
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DOI: https://doi.org/10.1007/978-981-13-0920-5_3
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