Analytical Minimization of Interior Permanent Magnet Machine Torque Pulsations by Design of Sculpted Rotor

Steven Hayslett, Thang Pham and Elias Strangas
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Steven Hayslett: Department of Mechanical Engineering, Michigan State University, East Lansing, MI 48824, USA
Thang Pham: Department of Electrical and Computer Engineering, Michigan State University, East Lansing, MI 48824, USA
Elias Strangas: Department of Electrical and Computer Engineering, Michigan State University, East Lansing, MI 48824, USA

Energies, 2022, vol. 15, issue 11, 1-17

Abstract: A new and efficient analytical optimization methodology for the design of rotor features is developed and used in interior permanent magnet motors (IPM). The analytical methodology is based on an extended winding function theory to include the IPM rotor’s primary and secondary reluctance paths and the non-homogeneous airgap of the rotor sculpt features. The shape and placement of the rotor features, derived from the analytical-based optimization process, show the improvement in torque average and torque ripple of the IPM machine at a fraction of computational effort. The analytical optimization results are validated with finite element analysis via an exhaustive search.

Keywords: interior permanent magnet; rotor sculpting; torque ripple; MMF; permeance; winding function; optimization; analytical model; harmonics (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: 2022
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