Power reduction and resonance avoidance of Maglev vertical axis wind turbines using attractive type passive magnetic bearings

In this paper, a new model of magnetically levitated (Maglev) vertical axis wind turbines (VAWTs) is presented for power generation purposes. The rotor is suspended by two permanent magnet attractive type passive magnetic bearings and one control coil; it is possible to rotate the rotor without any...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Mahmoud S. MAHMOUD, Satoshi UENO, Changan JIANG
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2020
Materias:	magnetic levitation vertical axis wind turbines permanent magnet attractive type passive magnetic bearings zero-power axial position control resonance avoidance Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/33ad34b7b1114123810318943bc4c71b
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:33ad34b7b1114123810318943bc4c71b
record_format	dspace
spelling	oai:doaj.org-article:33ad34b7b1114123810318943bc4c71b2021-11-29T06:01:26ZPower reduction and resonance avoidance of Maglev vertical axis wind turbines using attractive type passive magnetic bearings2187-974510.1299/mej.20-00043https://doaj.org/article/33ad34b7b1114123810318943bc4c71b2020-08-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/7/5/7_20-00043/_pdf/-char/enhttps://doaj.org/toc/2187-9745In this paper, a new model of magnetically levitated (Maglev) vertical axis wind turbines (VAWTs) is presented for power generation purposes. The rotor is suspended by two permanent magnet attractive type passive magnetic bearings and one control coil; it is possible to rotate the rotor without any mechanical contact. The proposed model solves the most common problems which are found on the other Maglev VAWTs such as reducing the power consumption during the levitation to zero amperes by the zero-power control method and reducing rotation loss during rotation. In addition, the model has some main advantages consisting in the ability to avoid the resonance at the critical speed and increase the maximum rotation speed by changing the air gap between the rotor and passive magnetic bearings to adjust the radial stiffness of the rotor. The design of the passive magnetic bearings is investigated by the finite element analysis, and the optimum shape is discussed. The results of levitation tests are presented for the model to show the effectiveness of levitation current reduction and the adjustment of radial stiffness. The results of rotation tests show that the resonance can be avoided by changing the radial stiffness which also makes it possible to rotate the rotor over the critical speed. Moreover, the results of free-run tests show that the rotation loss of the proposed Maglev system is quite low.Mahmoud S. MAHMOUDSatoshi UENOChangan JIANGThe Japan Society of Mechanical Engineersarticlemagnetic levitationvertical axis wind turbinespermanent magnet attractive type passive magnetic bearingszero-power axial position controlresonance avoidanceMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 7, Iss 5, Pp 20-00043-20-00043 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	magnetic levitation vertical axis wind turbines permanent magnet attractive type passive magnetic bearings zero-power axial position control resonance avoidance Mechanical engineering and machinery TJ1-1570
spellingShingle	magnetic levitation vertical axis wind turbines permanent magnet attractive type passive magnetic bearings zero-power axial position control resonance avoidance Mechanical engineering and machinery TJ1-1570 Mahmoud S. MAHMOUD Satoshi UENO Changan JIANG Power reduction and resonance avoidance of Maglev vertical axis wind turbines using attractive type passive magnetic bearings
description	In this paper, a new model of magnetically levitated (Maglev) vertical axis wind turbines (VAWTs) is presented for power generation purposes. The rotor is suspended by two permanent magnet attractive type passive magnetic bearings and one control coil; it is possible to rotate the rotor without any mechanical contact. The proposed model solves the most common problems which are found on the other Maglev VAWTs such as reducing the power consumption during the levitation to zero amperes by the zero-power control method and reducing rotation loss during rotation. In addition, the model has some main advantages consisting in the ability to avoid the resonance at the critical speed and increase the maximum rotation speed by changing the air gap between the rotor and passive magnetic bearings to adjust the radial stiffness of the rotor. The design of the passive magnetic bearings is investigated by the finite element analysis, and the optimum shape is discussed. The results of levitation tests are presented for the model to show the effectiveness of levitation current reduction and the adjustment of radial stiffness. The results of rotation tests show that the resonance can be avoided by changing the radial stiffness which also makes it possible to rotate the rotor over the critical speed. Moreover, the results of free-run tests show that the rotation loss of the proposed Maglev system is quite low.
format	article
author	Mahmoud S. MAHMOUD Satoshi UENO Changan JIANG
author_facet	Mahmoud S. MAHMOUD Satoshi UENO Changan JIANG
author_sort	Mahmoud S. MAHMOUD
title	Power reduction and resonance avoidance of Maglev vertical axis wind turbines using attractive type passive magnetic bearings
title_short	Power reduction and resonance avoidance of Maglev vertical axis wind turbines using attractive type passive magnetic bearings
title_full	Power reduction and resonance avoidance of Maglev vertical axis wind turbines using attractive type passive magnetic bearings
title_fullStr	Power reduction and resonance avoidance of Maglev vertical axis wind turbines using attractive type passive magnetic bearings
title_full_unstemmed	Power reduction and resonance avoidance of Maglev vertical axis wind turbines using attractive type passive magnetic bearings
title_sort	power reduction and resonance avoidance of maglev vertical axis wind turbines using attractive type passive magnetic bearings
publisher	The Japan Society of Mechanical Engineers
publishDate	2020
url	https://doaj.org/article/33ad34b7b1114123810318943bc4c71b
work_keys_str_mv	AT mahmoudsmahmoud powerreductionandresonanceavoidanceofmaglevverticalaxiswindturbinesusingattractivetypepassivemagneticbearings AT satoshiueno powerreductionandresonanceavoidanceofmaglevverticalaxiswindturbinesusingattractivetypepassivemagneticbearings AT changanjiang powerreductionandresonanceavoidanceofmaglevverticalaxiswindturbinesusingattractivetypepassivemagneticbearings
_version_	1718407578047741952

Power reduction and resonance avoidance of Maglev vertical axis wind turbines using attractive type passive magnetic bearings

Ejemplares similares