Title :
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
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;
Conference_Titel :
Advanced Mechatronic Systems (ICAMechS), 2012 International Conference on
Conference_Location :
Tokyo
Print_ISBN :
978-1-4673-1962-1
