Open AccessA Study on the Design Procedure of the Eight Pole Magnetic Bearings for the Inner-rotor and the Outer-rotor Type
Author(s) -
Jun-Ho Lee,
Chan-Bae Park,
Byung-Song Lee,
Su-Gil Lee,
Jaehee Kim,
Shin-Myung Jung,
Hyungwoo Lee
Publication year - 2013
Publication title -
journal of electrical engineering and technology/journal of electrical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.226
H-Index - 27
eISSN - 2093-7423
pISSN - 1975-0102
DOI - 10.5370/jeet.2013.8.6.1424
Subject(s) - magnetic bearing , rotor (electric) , flywheel , controllability , bearing (navigation) , engineering , control theory (sociology) , mechanical engineering , position (finance) , flywheel energy storage , radius , computer science , energy storage , physics , mathematics , power (physics) , control (management) , computer security , finance , quantum mechanics , artificial intelligence , economics
This paper presents design procedure of the magnetic bearings used for high-speed electric machines and flywheel energy storage systems. Magnetic bearing can be categorized by inner- rotor type and outer-rotor type according to the position of the rotary disc. These two types are applicable based on application environments such as application space, required attraction force, and controllability. Magnetic bearing is generally designed based on the ratio (geometrical coefficient or geometrical efficiency) of pole width to rotor journal radius but proper ratio is only decided by the analysis. This is the difficulty of the magnetic bearing design. In this paper, proper design technology of the inner-rotor type and outer-rotor-type eight pole magnetic bearings is introduced and compared with the FEM analysis results, which verifies the proposed design procedure is suitable to be applied to the design of the magnetic bearings for the industrial applications and flywheel energy storage system