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.
|Journal||IEEE Transactions on Magnetics|
|State||Published - Nov 2018|
Bibliographical noteFunding Information:
ACKNOWLEDGMENT This work was supported in part by the University of Kentucky, in part by the L. Stanley Pigman Endowment, in part by the SPARK Program, and in part by ANSYS, Inc.
© 1965-2012 IEEE.
- Design of experiments (DOE)
- differential evolution (DE)
- multiobjective optimization
- switched reluctance (SR) motor
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering