Nonlinear Dynamic Model of PMBLDC Motor Considering Core Losses

Muhammed Fasil, Nenad Mijatovic, Bogi Bech Jensen, Joachim Holbøll

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Abstract

The phase variable model is used commonly when simulating a motor drive system with a three-phase permanent magnet brushless DC (PMBLDC) motor. The phase variable model neglects core losses and this affects its accuracy when modelling fractional-slot machines. The inaccuracy of phase variable model of fractional-slot machines can be attributed to considerable armature flux harmonics, which causes an increased core loss. This study proposes a nonlinear phase variable model of PMBLDC motor that considers the core losses induced in the stator and the rotor. The core loss model is developed based on the detailed analysis of the flux path and the variation of flux in different components of the machine. A prototype of fractional slot axial flux PMBLDC in-wheel motor is used to assess the proposed nonlinear dynamic model.
Original languageEnglish
JournalI E E E Transactions on Industrial Electronics
Volume64
Issue number12
Pages (from-to)9282-9280
Number of pages8
ISSN0278-0046
DOIs
Publication statusPublished - 2017

Bibliographical note

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Keywords

  • Brushless DC (BLDC)
  • Machines
  • Axial flux machines
  • Nonlinear model
  • Dynamic model
  • Segmented axial torus motor

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