Investigation of a tubular dual-stator flux-switching permanent-magnet linear generator for free-piston energy converter

This paper describes a tubular dual-stator flux-switching permanent-magnet (PM) linear generator for free-piston energy converter. The operating principle, topology, and design considerations of the machine are investigated. Combining the motion characteristic of free-piston Stirling engine, a tubul...

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Bibliographic Details
Published in:Journal of applied physics 2015-05, Vol.117 (17)
Main Authors: Sui, Yi, Zheng, Ping, Tong, Chengde, Yu, Bin, Zhu, Shaohong, Zhu, Jianguo
Format: Article
Language:English
Subjects:
Converters
Finite element method
Flux
Permanent magnets
Stators
Stirling engines
Switching
Teeth
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Summary:This paper describes a tubular dual-stator flux-switching permanent-magnet (PM) linear generator for free-piston energy converter. The operating principle, topology, and design considerations of the machine are investigated. Combining the motion characteristic of free-piston Stirling engine, a tubular dual-stator PM linear generator is designed by finite element method. Some major structural parameters, such as the outer and inner radii of the mover, PM thickness, mover tooth width, tooth width of the outer and inner stators, etc., are optimized to improve the machine performances like thrust capability and power density. In comparison with conventional single-stator PM machines like moving-magnet linear machine and flux-switching linear machine, the proposed dual-stator flux-switching PM machine shows advantages in higher mass power density, higher volume power density, and lighter mover.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4916186