NDLI: Torque characteristics enhancement of ring winding axial flux permanent magnet generator for direct-drive wind turbine

Content Provider	IET Digital Library
Author	Gharehseyed, Saber Vahedi, Abolfazl Nobahari, Amin Darjazini, Amir
Abstract	Ring winding axial flux permanent magnet (PM) machine (RWAFPM) has recently been introduced, which is beneficial in terms of manufacturability and fault tolerability. This study aims to examine the use of RWAFPM for a small-scale direct-drive wind generator. The structural features of the RWAFPM make it subjected to remarkable cogging torque. Accordingly, the main efforts of this study are focused on finding a proper solution for its torque profile challenges. In this regard, extensive investigations are carried out on rotor design improvements. First, several schemes are analysed, separately, including pole skewing, pole arc ratio modifying, pole grouping and rotor disks shifting. Then an optimum combination of selected schemes is calculated by the Taguchi method and considering the mean torque value as well as the PM usage. It is demonstrated that significantly improved results could be achieved mainly through cost-effective modified fabrication. The 3D finite element models are employed throughout the study along with some experimental measurements to verify the results.
Starting Page	1584
Ending Page	1591
Page Count	8
ISSN	17518660
Volume Number	14
e-ISSN	17518679
Issue Number	Issue 9, Sep (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-epa/14/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-epa.2020.0150
Journal	IET Electric Power Applications
Publisher Date	2020-04-29
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	3D Finite Element Models A.C. Machine Axial Flux Permanent Magnet Generator Cogging Torque Cost-effective Modified Fabrication D.C. Machines Direct-drive Wind Generator Direct-drive Wind Turbine Fault Tolerability Fault Tolerance Finite Element Analysis Machine Windings Mean Torque Value Permanent Magnet Generator PM RWAFPM Pole Arc Ratio Modification Pole Grouping Pole Skewing Ring Winding Axial Flux Permanent Magnet Machine Rotor Design Improvements Rotor Disks Rotors Statistics Structural Feature Taguchi Method Torque Torque Characteristic Enhancement Torque Profile Wind Power Plant Wind Turbine
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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