A study on dynamic characteristics of a permanent magnet hybrid magnetic bearing for a small-sized hydrodynamic generator

Author

Kurita, Nobuyuki ; Ishikawa, Takeo ; Ooshio, Keisuke

Author_Institution

Dept. of Electron. Eng., Gunma Univ., Kiryu, Japan

fYear

2012

Firstpage

154

Lastpage

159

Abstract

In order to develop high-efficiency and small-sized hydrodynamic generators, a novel permanent magnet biased magnetic bearing which has a three-dimensional flux path was designed and fabricated. The magnetic bearing is small but has a strong bearing capacity. This paper clarifies the operation principle and dynamic characteristics of the fabricated magnetic bearing. The fabricated magnetic bearing showed good control performance in both the time and frequency domains. In addition, the rotor rotated stably up to 10000 rpm. Moreover, rotational loss of the magnetic bearing was about one-fifth compared with a conventional mechanical ball bearing.

Keywords

ball bearings; hydrodynamics; magnetic bearings; rotors; 3D flux path; bearing capacity; dynamic characteristics; frequency domain; mechanical ball bearing; permanent magnet hybrid magnetic bearing; rotational loss; rotor; small-sized hydrodynamic generator; three-dimensional flux path; time domain; Coils; Frequency domain analysis; Hydrodynamics; Magnetic domains; Magnetic levitation; Rotors; Stators;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Mechatronic Systems (ICAMechS), 2012 International Conference on

Conference_Location

Tokyo

ISSN

1756-8412

Print_ISBN

978-1-4673-1962-1

Type

conf

Filename

6329699