Evaluation of a bearingless PM motor with wide magnetic gaps

Junichi Asama; Miya Amada; Norimasa Tanabe; Naoya Miyamoto; Akira Chiba; Satoru Iwasaki; Masatsugu Takemoto; Tadashi Fukao; M. Azizur Rahman

doi:10.1109/TEC.2010.2040828

Evaluation of a bearingless PM motor with wide magnetic gaps

Junichi Asama, Miya Amada, Norimasa Tanabe, Naoya Miyamoto, Akira Chiba, Satoru Iwasaki, Masatsugu Takemoto, Tadashi Fukao, M. Azizur Rahman

Research output: Contribution to journal › Article › peer-review

39 Citations (Scopus)

Abstract

A new noncontact drive system has been developed employing a consequent-pole-type bearingless permanent magnet (PM) motor and a thrust magnetic bearing. This bearingless motor has a wide magnetic gap. The wide magnetic gap may cause a decrease in radial magnetic suspension force because of an increase in magnetic reluctance. A thrust magnetic bearing is installed at the end of the shaft because strong thrust force exists in centrifugal pump applications. In this paper, the magnetic suspension forces and rotation characteristics of the experimental prototype are evaluated while the rotor is magnetically suspended. Experimental results are also compared to the calculated ones using the finite-element method. It is demonstrated that the developed consequent-pole-type bearingless PM motor possesses sufficient magnetic suspension force for noncontact operation.

Original language	English
Article number	5422659
Pages (from-to)	957-964
Number of pages	8
Journal	IEEE Transactions on Energy Conversion
Volume	25
Issue number	4
DOIs	https://doi.org/10.1109/TEC.2010.2040828
Publication status	Published - Dec 2010
Externally published	Yes

Keywords

Bearingless motor
centrifugal pump
consequent pole
magnetic bearing
permanent magnet (PM) motor
wide gap

ASJC Scopus subject areas

Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1109/TEC.2010.2040828

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Evaluation of a bearingless PM motor with wide magnetic gaps. / Asama, Junichi; Amada, Miya; Tanabe, Norimasa; Miyamoto, Naoya; Chiba, Akira; Iwasaki, Satoru; Takemoto, Masatsugu; Fukao, Tadashi; Rahman, M. Azizur.

In: IEEE Transactions on Energy Conversion, Vol. 25, No. 4, 5422659, 12.2010, p. 957-964.

Research output: Contribution to journal › Article › peer-review

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abstract = "A new noncontact drive system has been developed employing a consequent-pole-type bearingless permanent magnet (PM) motor and a thrust magnetic bearing. This bearingless motor has a wide magnetic gap. The wide magnetic gap may cause a decrease in radial magnetic suspension force because of an increase in magnetic reluctance. A thrust magnetic bearing is installed at the end of the shaft because strong thrust force exists in centrifugal pump applications. In this paper, the magnetic suspension forces and rotation characteristics of the experimental prototype are evaluated while the rotor is magnetically suspended. Experimental results are also compared to the calculated ones using the finite-element method. It is demonstrated that the developed consequent-pole-type bearingless PM motor possesses sufficient magnetic suspension force for noncontact operation.",

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AU - Asama, Junichi

AU - Amada, Miya

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AU - Iwasaki, Satoru

AU - Takemoto, Masatsugu

AU - Fukao, Tadashi

AU - Rahman, M. Azizur

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N2 - A new noncontact drive system has been developed employing a consequent-pole-type bearingless permanent magnet (PM) motor and a thrust magnetic bearing. This bearingless motor has a wide magnetic gap. The wide magnetic gap may cause a decrease in radial magnetic suspension force because of an increase in magnetic reluctance. A thrust magnetic bearing is installed at the end of the shaft because strong thrust force exists in centrifugal pump applications. In this paper, the magnetic suspension forces and rotation characteristics of the experimental prototype are evaluated while the rotor is magnetically suspended. Experimental results are also compared to the calculated ones using the finite-element method. It is demonstrated that the developed consequent-pole-type bearingless PM motor possesses sufficient magnetic suspension force for noncontact operation.

AB - A new noncontact drive system has been developed employing a consequent-pole-type bearingless permanent magnet (PM) motor and a thrust magnetic bearing. This bearingless motor has a wide magnetic gap. The wide magnetic gap may cause a decrease in radial magnetic suspension force because of an increase in magnetic reluctance. A thrust magnetic bearing is installed at the end of the shaft because strong thrust force exists in centrifugal pump applications. In this paper, the magnetic suspension forces and rotation characteristics of the experimental prototype are evaluated while the rotor is magnetically suspended. Experimental results are also compared to the calculated ones using the finite-element method. It is demonstrated that the developed consequent-pole-type bearingless PM motor possesses sufficient magnetic suspension force for noncontact operation.

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KW - consequent pole

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KW - permanent magnet (PM) motor

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Evaluation of a bearingless PM motor with wide magnetic gaps

Abstract

Keywords

ASJC Scopus subject areas

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