Analysis of Fractional-Slot Axial-Flux PM Machines by 3-D FE Simulation

Research Area: Volume 6,Issue 2, March 2017 Year: 2017
Type of Publication: Article Keywords: Axial Flux Permanent Magnet, Brushless Dc, Yokeless Segmented Stator, Cogging Torque, Unbalanced Torque, 3-D Finite Element
  • Hongwei Lu
  • Ahmet Kamran
Journal: IJEIR Volume: 6
Number: 2 Pages: 74-78
Month: March
ISSN: 2277-5668
As the concept of hybrid electric vehicles and more electric aircraft are extending nowadays, achieving the desired performance along with decreasing the weight can be of the highest importance for the companies to save the fuel and decrease the costs. Axial-flux PM brushless-dc machines with concentrated windings provide high efficiency, compact construction, and high torque-density and are subsequently excellent choices to be used in direct-driven applications. As pole and slot combination has dominant effect on machine performance, this paper investigates effect of similar pole and slot numbers on machine's performance by three-dimensional finite-element (3-D FE) analysis. Air-gap flux density, back-electromotive force (back-EMF), cogging torque, winding inductance, and unbalanced torque exerted on bearings of two 3.4 kW axial-flux PM brushless-dc machines are obtained using 3-D FE method. It provides useful results to be considered in design of brushless-dc machines.

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