Open Access

ARTICLE

The Multi-Objective Optimization of AFPM Generators with Double-Sided Internal Stator Structures for Vertical Axis Wind Turbines

Dandan Song^1,*, Lianjun Zhou¹, Ziqi Peng², Senhua Luo², Jun Zhu³

1 Jiangsu Jinfeng Technology Co., Ltd., Yancheng, 224100, China
2 School of Automation, Nanjing University of Science and Technology, Nanjing, 210094, China
3 School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo, 454000, China

* Corresponding Author: Dandan Song. Email:

(This article belongs to the Special Issue: Wind Energy Development and Utilization)

Energy Engineering 2021, 118(5), 1439-1452. https://doi.org/10.32604/EE.2021.015011

Received 15 October 2020; Accepted 18 December 2020; Issue published 16 July 2021

Abstract

The axial flux permanent magnet (AFPM) generator with double-sided internal stator structure is highly suitable for vertical axis wind turbines due to its high power density. The performance of the AFPM generator with double-sided internal stator structure can be improved by the reasonable design of electromagnetic parameters. To further improve the overall performance of the AFPM generator with double-sided internal stator structure, multivariable (coil width ω_c, permanent magnet thickness h, pole arc coefficient α_p and working air gap l_g) and multi-objective (generator efficiency η, total harmonic distortion of the voltage THD and induced electromotive force amplitude EMF) functional relationships are innovatively established. Orthogonal analysis, mean analysis and variance analysis are performed on the influence parameters by combining the Taguchi method and response surface methodology to study the influence degrees of each influence parameter on the optimization objectives to determine the most appropriate electromagnetic parameters. The optimization results are verified by 3D finite element analysis. The optimized APFM generator with double-sided internal stator structure exhibits superior economy, stronger magnetic density, higher efficiency and improved power quality.

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Keywords

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