Open AccessAnalysis, design and experimental verification of a field‐modulated permanent‐magnet machine for direct‐drive wind turbines
Author(s) -
Li Xianglin,
Chau Kwok Tong,
Cheng Ming
Publication year - 2015
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.815
H-Index - 97
eISSN - 1751-8679
pISSN - 1751-8660
DOI - 10.1049/iet-epa.2014.0156
Subject(s) - wind power , magnet , rotor (electric) , torque , finite element method , engineering , power (physics) , voltage , design process , mechanical engineering , field (mathematics) , process (computing) , automotive engineering , control engineering , computer science , electrical engineering , physics , structural engineering , work in process , operations management , mathematics , quantum mechanics , pure mathematics , thermodynamics , operating system
This paper presents the design and experimental verification of a field‐modulated permanent‐magnet (FMPM) machine using spoke‐magnet outer rotor for direct‐drive wind turbines. The fundamental operation and optimised design process of the proposed machine are elaborated and discussed in detail. The electromagnetic analytical calculation is used for the initial determination of the prototype design, mainly concerning the special constraints of wind power generation, and the two‐dimensional finite element analysis is also applied to optimise and investigate the detailed characteristics. A 5 kW prototype is constructed, and the measured performances have verified the analysis and design, justifying that the proposed machine can offer significant advantages of high‐torque capability and low‐voltage regulation. Experience gained from this study has led to develop a general design guideline for the open‐slot FMPM machine using spoke‐magnet outer rotor for direct‐drive applications.