Switching control between three-coil and five-coil modes for six-pole active magnetic bearings

Six-pole active magnetic bearings (AMBs) have fewer poles than the more common eight-pole AMBs making it possible for them to be miniaturized and used in the development of small motors. In this paper, we propose a novel control method for the six-pole AMB, which switches between three-coil and five...

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Autores principales:	Satoshi UENO, Changan JIANG
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2019
Materias:	active magnetic bearing six-pole stator control current power consumption switching control three-coil mode five-coil mode rotary machinery Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/f8bd715996944d69babc1d60ca9ddaf0
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spelling	oai:doaj.org-article:f8bd715996944d69babc1d60ca9ddaf02021-11-29T05:47:05ZSwitching control between three-coil and five-coil modes for six-pole active magnetic bearings2187-974510.1299/mej.19-00295https://doaj.org/article/f8bd715996944d69babc1d60ca9ddaf02019-09-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/6/5/6_19-00295/_pdf/-char/enhttps://doaj.org/toc/2187-9745Six-pole active magnetic bearings (AMBs) have fewer poles than the more common eight-pole AMBs making it possible for them to be miniaturized and used in the development of small motors. In this paper, we propose a novel control method for the six-pole AMB, which switches between three-coil and five-coil modes. The three-coil mode excites three coils to generate a suspension force and reduce power consumption. In contrast, the five-coil mode excites five coils and can generate a larger maximum force than the three-coil mode. By switching between the two modes, it is possible to realize both an increase in the maximum suspension force and a reduction in power consumption. This paper derives the coil currents in the three- and five-coil modes, and introduces a switching method between them. The proposed method is verified with a test rig, and results show that the proposed method enables stable levitation with a lower current limit compared with the method that uses the three-coil mode alone. Moreover, a start-up procedure with a low current limit is proposed and experimentally verified.Satoshi UENOChangan JIANGThe Japan Society of Mechanical Engineersarticleactive magnetic bearingsix-pole statorcontrol currentpower consumptionswitching controlthree-coil modefive-coil moderotary machineryMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 6, Iss 5, Pp 19-00295-19-00295 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	active magnetic bearing six-pole stator control current power consumption switching control three-coil mode five-coil mode rotary machinery Mechanical engineering and machinery TJ1-1570
spellingShingle	active magnetic bearing six-pole stator control current power consumption switching control three-coil mode five-coil mode rotary machinery Mechanical engineering and machinery TJ1-1570 Satoshi UENO Changan JIANG Switching control between three-coil and five-coil modes for six-pole active magnetic bearings
description	Six-pole active magnetic bearings (AMBs) have fewer poles than the more common eight-pole AMBs making it possible for them to be miniaturized and used in the development of small motors. In this paper, we propose a novel control method for the six-pole AMB, which switches between three-coil and five-coil modes. The three-coil mode excites three coils to generate a suspension force and reduce power consumption. In contrast, the five-coil mode excites five coils and can generate a larger maximum force than the three-coil mode. By switching between the two modes, it is possible to realize both an increase in the maximum suspension force and a reduction in power consumption. This paper derives the coil currents in the three- and five-coil modes, and introduces a switching method between them. The proposed method is verified with a test rig, and results show that the proposed method enables stable levitation with a lower current limit compared with the method that uses the three-coil mode alone. Moreover, a start-up procedure with a low current limit is proposed and experimentally verified.
format	article
author	Satoshi UENO Changan JIANG
author_facet	Satoshi UENO Changan JIANG
author_sort	Satoshi UENO
title	Switching control between three-coil and five-coil modes for six-pole active magnetic bearings
title_short	Switching control between three-coil and five-coil modes for six-pole active magnetic bearings
title_full	Switching control between three-coil and five-coil modes for six-pole active magnetic bearings
title_fullStr	Switching control between three-coil and five-coil modes for six-pole active magnetic bearings
title_full_unstemmed	Switching control between three-coil and five-coil modes for six-pole active magnetic bearings
title_sort	switching control between three-coil and five-coil modes for six-pole active magnetic bearings
publisher	The Japan Society of Mechanical Engineers
publishDate	2019
url	https://doaj.org/article/f8bd715996944d69babc1d60ca9ddaf0
work_keys_str_mv	AT satoshiueno switchingcontrolbetweenthreecoilandfivecoilmodesforsixpoleactivemagneticbearings AT changanjiang switchingcontrolbetweenthreecoilandfivecoilmodesforsixpoleactivemagneticbearings
_version_	1718407624004730880

Switching control between three-coil and five-coil modes for six-pole active magnetic bearings

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