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Actuators 2017, 6(2), 14; doi:10.3390/act6020014

Development of a Compact Axial Active Magnetic Bearing with a Function of Two-Tilt-Motion Control

Department of Mechanical Engineering, Saitama University, Shimo okubo 255, Sakura-ku, Saitama 338-8570, Japan
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Author to whom correspondence should be addressed.
Academic Editor: Eric H. Maslen
Received: 15 December 2016 / Revised: 9 March 2017 / Accepted: 28 March 2017 / Published: 30 March 2017
(This article belongs to the Special Issue Active Magnetic Bearing Actuators)
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Abstract

A compact axial active magnetic bearing with a function of two-tilt-motion control is fabricated which has a new configuration of magnetic poles. They consist of four cylindrical poles with coils and a single common pole whose opposite plane of the rotor has a permanent magnet to achieve multi-degree-of-freedom zero power control. Modal control is applied because local zero power control may make the whole system unstable when the number of control channels is larger than the number of freedoms of motion to be controlled. In the developed system, a disk-shape rotor is sandwiched between two axial magnetic bearing stators that are operated differentially. Such a configuration makes it possible to rotate the rotor without disturbing the axial motion. The characteristics of the fabricated magnetic bearing system including rotation are studied experimentally. View Full-Text
Keywords: magnetic suspensions; magnetic bearings; zero power control; magnetic field analysis magnetic suspensions; magnetic bearings; zero power control; magnetic field analysis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Ishino, Y.; Mizuno, T.; Takasaki, M.; Hara, M.; Yamaguchi, D. Development of a Compact Axial Active Magnetic Bearing with a Function of Two-Tilt-Motion Control. Actuators 2017, 6, 14.

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