Open AccessInvestigation of design methodology for non‐rare‐earth variable‐flux switched‐flux memory machines
Author(s) -
Yang Hui,
Lin Heyun,
Zhuang Erxing,
Fang Shuhua,
Huang Yunkai
Publication year - 2016
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.2015.0427
Subject(s) - stator , magnet , rotor (electric) , counter electromotive force , torque , magnetic flux , flux (metallurgy) , control theory (sociology) , computer science , mechanical engineering , automotive engineering , engineering , materials science , electrical engineering , magnetic field , electromagnetic coil , physics , control (management) , quantum mechanics , artificial intelligence , metallurgy , thermodynamics
This study presents a design methodology for a newly emerged switched‐flux memory machine with low‐cost non‐rare‐earth. The adoption of aluminium–nickel–cobalt magnet with low‐coercive force enables the flexible air‐gap flux control without unnecessary excitation loss. Hence, the excellent flux variability and high‐efficiency sustainability within a wide‐speed range can be achieved. Since geometric constraints exist among major parameters, a design trade‐off should be established to facilitate the feasible design. Therefore, a simplified magnetic circuit is modelled to analytically determine the relationships among various parameters, and the generic design considerations including magnet grade selection and stator/rotor‐pole combination are addressed, respectively. The influences of design parameters on back‐electromotive force and torque capability are evaluated to aid the performance optimisation. A machine prototype is then fabricated to experimentally validate the theoretical analyses.