Advanced Theory of Fractional-Slot Concentrated-Wound Permanent Magnet Synchronous Machines

  • Mohammad Farshadnia

Part of the Springer Theses book series (Springer Theses)

About this book


This book focuses on the analytical modeling of fractional-slot concentrated-wound (FSCW) interior permanent magnet (IPM) machines and establishes a basis for their magnetic and electrical analysis. Aiming at the precise modeling of FSCW IPM machines’ magnetic and electrical characteristics, it presents a comprehensive mathematical treatment of the stator magneto-motive force (MMF), the IPM rotor non-homogeneous magnetic saturation, and its airgap flux density. The FSCW stator spatial MMF harmonics are analytically formulated, providing a basis on which a novel heuristic algorithm is then proposed for the design of optimal winding layouts for multiphase FSCW stators with different slot/pole combinations. In turn, the proposed mathematical models for the FSCW stator and the IPM rotor are combined to derive detailed mathematical expressions of its operational inductances, electromagnetic torque, torque ripple and their respective subcomponents, as a function of the machine geometry and design parameters. Lastly, the proposed theories and analytical models are validated using finite element analysis and experimental tests on a prototype FSCW IPM machine.


Multiphase Fractional-slot Concentrated-wound (FSCW) Interior Permanent Magnet (IPM) Stator Magneto-motive Force (MMF) Airgap Flux Density Maximum Torque Per Ampere Open-Phase Fault Conditions Electromagnetic Torque dq Model Permanent Magnet Synchronous Motor (PMSM) Airgap Magnetic Field Estimation

Authors and affiliations

  • Mohammad Farshadnia
    • 1
  1. 1.School of Electrical Engineering and TelecommunicationsThe University of New South WalesSydneyAustralia

Bibliographic information

  • DOI
  • Copyright Information Springer Nature Singapore Pte Ltd. 2018
  • Publisher Name Springer, Singapore
  • eBook Packages Engineering Engineering (R0)
  • Print ISBN 978-981-10-8707-3
  • Online ISBN 978-981-10-8708-0
  • Series Print ISSN 2190-5053
  • Series Online ISSN 2190-5061
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