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2016•The Proceedings of the Dynamics & Design ConferenceRequires access

Wide-gap-applicable flux-path control type magnetic bearing

Ken-ichi Matsuda, Kaname MIYAJIMA, Ryou KONDO, Toru Masuzawa

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Abstract

In this study, a high efficiency wide-gap-applicable flux-path control type magnetic bearing is proposed. It has homopolar type rotors with a permanent magnet between them. The stators are composed of the bias circuit component and the electromagnets component. The bias component generates bias magnetic fluxes by the strong neodymium permanent magnets, while the electromagnets component generates control fluxes by the electromagnets. It is feasible to reduce the energy consumption, because the control fluxes don’t act directly on the homopolar rotors, but can change the flux paths of the bias fluxes. The control forces are generated by the imbalance of the bias fluxes between the rotor and the stators. The experimental setup is made and the basic characteristics of the ultra-wide-gap magnetic bearing are tested. Even though the wide air gap of 30mm, the results show a highly stable levitation.

About this research paper

What this paper is about

In this study, a high efficiency wide-gap-applicable flux-path control type magnetic bearing is proposed. It has homopolar type rotors with a permanent magnet between them. The stators are composed of the bias circuit component and the electromagnets component. The bias component generates bias magnetic fluxes by the strong neodymium permanent magnets, while the electromagnets component generates control fluxes by the electromagnets. It is feasible to reduce the energy consumption, because the control fluxes don’t act directly on the homopolar rotors, but can change the flux paths of the bias fluxes. The control forces are generated by the imbalance of the bias fluxes between the rotor and the stators. The experimental setup is made and the basic characteristics of the ultra-wide-gap magnetic bearing are tested. Even though the wide air gap of 30mm, the results show a highly stable levitation.

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Available abstract

In this study, a high efficiency wide-gap-applicable flux-path control type magnetic bearing is proposed. It has homopolar type rotors with a permanent magnet between them. The stators are composed of the bias circuit component and the electromagnets component. The bias component generates bias magnetic fluxes by the strong neodymium permanent magnets, while the electromagnets component generates control fluxes by the electromagnets. It is feasible to reduce the energy consumption, because the control fluxes don’t act directly on the homopolar rotors, but can change the flux paths of the bias fluxes. The control forces are generated by the imbalance of the bias fluxes between the rotor and the stators. The experimental setup is made and the basic characteristics of the ultra-wide-gap magnetic bearing are tested. Even though the wide air gap of 30mm, the results show a highly stable levitation.

Key concepts: Homopolar motor, Electromagnet, Magnet, Magnetic bearing, Rotor (electric), Magnetic levitation, Levitation, Air gap (plumbing)

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