Analytical Modeling of a Novel Transverse Flux Machine for Direct Drive Wind Turbine Applications

Eduard Muljadi, Iftekhar Hasan, Tausif Husain, Md Uddin, Yilmaz Sozer, Iqbal Husain

Research output: Contribution to conferencePaper

22 Scopus Citations


This paper presents a nonlinear analytical model of a novel double sided flux concentrating Transverse Flux Machine (TFM) based on the Magnetic Equivalent Circuit (MEC) model. The analytical model uses a series-parallel combination of flux tubes to predict the flux paths through different parts of the machine including air gaps, permanent magnets (PM), stator, and rotor. The two-dimensional MEC model approximates the complex three-dimensional flux paths of the TFM and includes the effects of magnetic saturation. The model is capable of adapting to any geometry which makes it a good alternative for evaluating prospective designs of TFM as compared to finite element solvers which are numerically intensive and require more computation time. A single phase, 1 kW, 400 rpm machine is analytically modeled and its resulting flux distribution, no-load EMF and torque, verified with Finite Element Analysis (FEA). The results are found to be in agreement with less than 5% error, while reducing the computation time by 25 times.
Original languageAmerican English
Number of pages8
StatePublished - 2015
Event2015 IEEE Energy Conversion Congress and Exposition (ECCE) - Montreal, Quebec, Canada
Duration: 20 Sep 201524 Sep 2015


Conference2015 IEEE Energy Conversion Congress and Exposition (ECCE)
CityMontreal, Quebec, Canada

Bibliographical note

See NREL/CP-5D00-64745 for preprint

NREL Publication Number

  • NREL/CP-5D00-66400


  • finite element analysis (FEA)
  • flux concentrating
  • magnetic equivalent circuit (MEC)
  • magnetic saturation
  • nonlinear
  • transverse flux machine (TFM)


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