Affiliations: [a] School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454000, China | [b] Department of Electrical Engineering, School of Energy and Transportation Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China
Correspondence:
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Corresponding author: Z. Jun, Electrical Engineering and Automation, Henan University of Technology, Jiaozuo 454000, Henan, China. Tel.: 13462417363; E-mail: [email protected]
Abstract: In order to improve the suspension characteristics of passive magnetic bearings in vertical axis wind power generation system, T-shaped group of passive magnetic bearing with three rings which owns high suspension characteristics are proposed. The working principle of the structure is described briefly. The multi-objective optimization is achieved with high bearing capacity and high magnetic stiffness by studying its impacts on the magnetic ring with variable geometric parameters: the height of the magnetic ring, the thickness of the magnetic ring and the air gaps between the magnetic rings. The research shows that suspension characteristics of the novel structure are 2 times of the traditional radial magnetic bearings. Its the bearing capacity is at least 1.75 times before optimization and the magnetic stiffness is at least twice as high as before optimization which provides a reference for the suspension characteristics of the vertical axis wind turbine suspension system.
Keywords: Vertical axis, high magnetic stiffness, high bearing capacity, suspension characteristics
