A new iron loss model for brushless doubly-fed machines with hysteresis and field rotational losses

Salman Abdi Jalebi, Ehsan Abdi, Richard McMahon

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Abstract

The brushless doubly-fed machine (BDFM) has two stator windings with different pole numbers, supplied with different frequencies. Therefore, the distribution of magnetic fields in stator and rotor iron is complex. In addition, the stator flux density distribution is non-sinusoidal and has a DC offset at the natural speed. This makes the use of conventional hysteresis models utilised for sinusoidal fields impractical for the BDFM. In this paper a new hysteresis model is proposed for the BDFM stator iron based on the scalar Preisach model. The rotational characteristics of the magnetic fields in the BDFM are also considered and their effects in generating iron losses are assessed. 2-D time-stepping finite element (FE) models are developed for a prototype D160 BDFM to estimate iron losses and are validated by experiments.
Original languageEnglish
Pages (from-to)3221-3230
Number of pages10
JournalIEEE Transactions on Energy Conversion
Volume36
Issue number4
Early online date27 Apr 2021
DOIs
Publication statusPublished - Dec 2021

Keywords

  • Brushless Doubly Fed Machine (BDFM)
  • Epstein frame
  • Finite element analysis
  • Hysteresis models
  • Iron loss calculation
  • Rotational magnetic fields

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