Optimal Design of a Switched Reluctance Motor with Magnetically Disconnected Rotor Modules Using a Design of Experiments Differential Evolution FEA-Based Method
- Publication Type:
- Journal Article
- Citation:
- IEEE Transactions on Magnetics, 2018, 54 (11)
- Issue Date:
- 2018-11-01
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© 1965-2012 IEEE. Switched reluctance (SR) machines are attractive because they present relatively high efficiency and torque density in spite of lacking permanent magnets. This paper focuses on a two-objective optimization of an external rotor SR motor with a stator that has concentrated coils and a rotor with magnetically isolated modules. The objectives are minimum loss and mass, and 11 independent dimensionless geometric variables are considered as inputs that affect them. A combined design of experiments (DOE) and differential evolution (DE) approach is proposed. The DOE methodology is used to reduce the search space by eliminating from consideration input variable values, leading to poor-performing designs. Following this initial DOE study, an optimization study based on DE is run over the reduced search space, which leads to significant savings in computation time. Furthermore, a directed graph-based method for comparing different designs on the Pareto front to rank the best compromise designs is proposed.
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