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Design and analysis of tubular permanent magnetic linear generator with 120° phase belt toroidal windings

Jikai Si (College of Electric Engineering, Zhengzhou University, Zhengzhou, China)
Zuoguang Yan (College of Electric Engineering, Zhengzhou University, Zhengzhou, China)
Rui Nie (College of Electric Engineering, Zhengzhou University, Zhengzhou, China)
Shuai Xu (College of Electric Engineering, Zhengzhou University, Zhengzhou, China)
Chun Gan (School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, China)
Wenping Cao (School of Electrical Engineering and Automation, Anhui University, Anhui, China)

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering

ISSN: 0332-1649

Article publication date: 16 August 2021

Issue publication date: 8 October 2021

93

Abstract

Purpose

To improve the power density and generation efficiency of the tubular permanent magnetic linear generators (TPMLGs) under realistic sea-stator condition, a TPMLG with 120° phase belt toroidal windings (120°-TPMLG) for wave energy conversion is proposed in this paper.

Design/methodology/approach

First, the structure of the 120°-TPMLG is introduced and its operation principle is analyzed. Second, the design process of the 120°-TPMLG is described. Meanwhile, the finite-element models of the 120°-TPMLG and the TPMLG with traditional fractional pitch windings (T-TPMLG) are established based on the similar overall dimensions. Then, the electromagnetic characteristics of the 120°-TPMLG are analyzed, such as air gap flux density, back electromotive force and load voltage. Finally, a comparative analysis of the magnetic flux density, flux linkage, load and no-load performance of the two generators are conducted.

Findings

The result shows that the 120°-TPMLG has higher power density and generation efficiency than the T-TPMLG.

Originality/value

This paper proposes a TPMLG with 120° phase belt toroidal windings (120°-TPMLG) to improve the power density and generation efficiency.

Keywords

Acknowledgements

This article is supported in part by the National Natural Science Foundation of China (NSFC) 51777060 and in part by the Major Special Project for Collaborative Innovation in Zhengzhou under Grant 20XTZX12023.

Citation

Si, J., Yan, Z., Nie, R., Xu, S., Gan, C. and Cao, W. (2021), "Design and analysis of tubular permanent magnetic linear generator with 120° phase belt toroidal windings", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 40 No. 4, pp. 783-801. https://doi.org/10.1108/COMPEL-08-2020-0289

Publisher

:

Emerald Publishing Limited

Copyright © 2021, Emerald Publishing Limited

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