수동형 마그네틱 베어링이 결합된 스텝 모터의 설계

Abstract

This paper introduces a step motor with a passively levitated rotor which comprises a homopolar step motor and a passive magnetic bearing. Compared with conventional self-bearing motors which are mostly based on the active magnetic bearing technology, the proposed motor has a very simple structure and operating principle. For the levitation, it works just like passive magnetic bearings which use the repulsive force between permanent magnets. Halbach array is used to increase the bearing stiffness. On the other hand, its rotation principle is just the same with that of conventional motors. In this paper, we introduce the design scheme to avoid the flux interference possibly produced by electromagnets and permanent magnets, and show some results of FEM analysis to predict the performance of the proposed motor.攀†책임저자;정회원, 한국과학기술연구원 트라이볼로지 연구센터E-mail : sjongkim@kist.re.krTel : (02)958-5610, Fax : (02)958-5659* 정회원, 한국과학기술연구원 트라이볼로지 연구센터