Asymmetrical Rotor Skewing Optimization in Switched Reluctance Machines Using Differential Evolutionary Algorithm

Jorge Torres, Pablo Moreno-Torres, Gustavo Navarro, Marcos Blanco, Jorge Nájera, Miguel Santos-Herran and Marcos Lafoz
Additional contact information
Jorge Torres: CIEMAT, Spanish National Research Centre on Energy, Environment and Technology, 28040 Madrid, Spain
Pablo Moreno-Torres: Gamesa Electric, 28830 Madrid, Spain
Gustavo Navarro: CIEMAT, Spanish National Research Centre on Energy, Environment and Technology, 28040 Madrid, Spain
Marcos Blanco: CIEMAT, Spanish National Research Centre on Energy, Environment and Technology, 28040 Madrid, Spain
Jorge Nájera: CIEMAT, Spanish National Research Centre on Energy, Environment and Technology, 28040 Madrid, Spain
Miguel Santos-Herran: CIEMAT, Spanish National Research Centre on Energy, Environment and Technology, 28040 Madrid, Spain
Marcos Lafoz: CIEMAT, Spanish National Research Centre on Energy, Environment and Technology, 28040 Madrid, Spain

Energies, 2021, vol. 14, issue 11, 1-25

Abstract: Minimizing torque ripple in electrical machines for a given application is not a straightforward task, especially when the application imposes certain constraints. There are many techniques to improve torque ripple, either design-based or control-based. In this paper, a new geometry for switched reluctance machines based on rotor poles skewing is proposed to minimize torque ripple. This paper describes a methodology to design an asymmetrical skew rotor—switched reluctance machine using a multi-objective differential evolutionary algorithm. The main parameters of the optimization process are defined, as is the optimization methodology to obtain an improved design with less torque ripple than a conventional one. Moreover, the analytical formulas used in the optimization method, as well as the optimization technique, are deduced and explained in detail. The mathematical model used to simulate the electrical machine and the power converter are also described. Two-dimensional and three-dimensional finite element analyses were also conducted to assess whether 3D effects (end-effect and axial fringing field) affected the results. Finally, a particular case of a high-voltage direct current-controlled generator in the base of the More Electric Aircraft (MEA) concept or an energy storage system as an electrical machine was analyzed, and the results for the improved configuration were compared with those for the conventional one.

Keywords: switched reluctance machine; torque ripple; skewed rotor; differential evolution optimization; multi-objective optimization (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: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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