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Energies 2016, 9(9), 672; doi:10.3390/en9090672

Analytical Model of a Dual Rotor Radial Flux Wind Generator Using Ferrite Magnets

School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China
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Author to whom correspondence should be addressed.
Academic Editor: Frede Blaabjerg
Received: 9 July 2016 / Revised: 13 August 2016 / Accepted: 18 August 2016 / Published: 24 August 2016
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Abstract

This paper presents a comprehensive analytical model for dual rotor radial flux wind generators based on the equivalent magnetic circuit method. This model is developed to predict the flux densities of the inner and outer air gaps, flux densities of the rotor and stator yokes, back electromotive force (EMF), electromagnetic torque, cogging torque, and some other characteristics important for generator design. The 2D finite element method (FEM) is employed to verify the presented analytical model, fine-tune it, and validate the prediction precision. The results show that the errors between the proposed analytical model and the FEM results are less than 5% and even less than 1% for certain parameters, that is, the results obtained from the proposed analytical model match well the ones obtained from FEM analysis. Meanwhile, the working points at different temperatures are confirmed to exceed the knee point of the BH curve, which means that irreversible demagnetization does not occur. Finally, the optimization by FEM with the objective of fully using the inner space of the generator, decreasing the cogging torque, and reducing the total harmonic distortion (THD) of back EMF is performed. View Full-Text
Keywords: dual rotor radial flux wind generator; analytical model; equivalent magnetic circuit; ferrite magnets; finite element method; optimization dual rotor radial flux wind generator; analytical model; equivalent magnetic circuit; ferrite magnets; finite element method; optimization
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Xu, P.; Shi, K.; Sun, Y.; Zhu, H. Analytical Model of a Dual Rotor Radial Flux Wind Generator Using Ferrite Magnets. Energies 2016, 9, 672.

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