A General Investigation on the Differential Leakage Factor for Symmetrical and Asymmetrical Multiphase Winding Design

Massimo Caruso, Antonino Oscar Di Tommaso, Fabrizio Marignetti and Rosario Miceli
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Massimo Caruso: Department of Engineering, University of Palermo, Viale delle Scienze, Building nr. 9, 90128 Palermo, Italy
Antonino Oscar Di Tommaso: Department of Engineering, University of Palermo, Viale delle Scienze, Building nr. 9, 90128 Palermo, Italy
Fabrizio Marignetti: Department of Electrical and Information Engineering, University of Cassino and South Lazio, via G. Di Biasio 43, 03043 Cassino, Italy
Rosario Miceli: Department of Engineering, University of Palermo, Viale delle Scienze, Building nr. 9, 90128 Palermo, Italy

Energies, 2020, vol. 13, issue 20, 1-13

Abstract: This work provides an investigation based on a fast estimation of the degree of unbalance ( D . U . % ) and the differential leakage factor ( σ 0 ) of multiphase electrical machine windings. This analysis is carried out by exploring almost 5000 combinations in terms of number of slots, pole pairs, phases and layers. The variability of the leakage factor is examined for each condition, defining an optimal region for its minimization. As a result, an extended mapping is carried out for both the degree of unbalance and the leakage factor, providing a useful tool during the early design stage of winding configurations for multiphase electric machines, even with slight asymmetries. The results obtained from this investigation are validated through finite element analysis and demonstrate that the differential leakage factor can be significantly reduced by adopting winding configurations with slight asymmetries, which also represent a valuable alternative in the electrical machine design.

Keywords: electrical machines; differential leakage factor; symmetrical windings; asymmetrical windings; unbalance degree; winding design (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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