Application of surrogate optimization routine with clustering technique for optimal design of an induction motor

Aswin Balasubramanian*, Floran Martin, Md Masum Billah, Osaruyi Osemwinyen, Anouar Belahcen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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This paper proposes a new surrogate optimization routine for optimal design of a direct on line (DOL) squirrel cage induction motor. The geometry of the motor is optimized to maximize its electromagnetic efficiency while respecting the constraints, such as output power and power factor. The routine uses the methodologies of Latin-hypercube sampling, a clustering technique and a Box–Behnken design for improving the accuracy of the surrogate model while efficiently utilizing the computational resources. The global search-based particle swarm optimization (PSO) algorithm is used for optimizing the surrogate model and the pattern search algorithm is used for fine-tuning the surrogate optimal solution. The proposed surrogate optimization routine achieved an optimal design with an electromagnetic efficiency of 93.90%, for a 7.5 kW motor. To benchmark the performance of the surrogate optimization routine, a comparative analysis was carried out with a direct optimization routine that uses a finite element method (FEM)-based machine model as a cost function.

Original languageEnglish
Article number5042
Number of pages19
Issue number16
Publication statusPublished - 17 Aug 2021
MoE publication typeA1 Journal article-refereed


  • Box–Behnken design
  • Clustering
  • Induction motors
  • Latin-hypercube sampling
  • Particle swarm optimization
  • Pattern search
  • Surrogate optimization


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