Affiliations: [a] College of Energy and Electrical Engineering, Hohai
University, Nanjing, Jiangsu, China | [b] Research Center for Renewable Energy Generation
Engineering, Ministry of Education, Nanjing, Jiangsu, China
Correspondence:
[*]
Corresponding author: Qingyan Wang, College of Energy and
Electrical Engineering, Hohai University, 8 Fochengxi Road, Nanjing 210098,
Jiangsu, China. Tel.: +86 025 5809 9191; E-mail: wqyhohai@gmail.com
Abstract: To solve the problem of heat and friction existing in weight bearing
of the hydraulic generator, a new type of magnetic levitation devices is
proposed. The devices consist of electromagnetic and permanent magnetic
levitation, which share together most of the hydraulic generator rotor weight
to reduce axial load on thrust bearing. The permanent magnetic levitation is
performed by new repulsive ring Halbach arrays. The new Halbach arrays are
analyzed by using magnetic potential equations and superposition principle, and
the magnetic flux density formulas are obtained. The formula results are
verified by FEM. By further study of 3D model simulation analysis, it is
confirmed that the new repulsive ring Halbach arrays can reach the design goal
on actual working conditions.
Keywords: Hydraulic generator, magnetic levitation, Halbach array, repulsion
