Comparison of Magnetic Gear Characteristics Using Different Permanent Magnet Materials

Eui Jong Park; Sang Yong Jung; Yong Jae Kim

doi:10.1109/TASC.2020.2966180

Comparison of Magnetic Gear Characteristics Using Different Permanent Magnet Materials

Eui Jong Park, Sang Yong Jung, Yong Jae Kim

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

20 Scopus citations

Abstract

In the coaxial magnetic gear, the permanent magnets of each rotor face each other, and the driving frequency of each rotor has different values according to the gear ratio. The magnetic flux that changes with time is transmitted to each permanent magnet. If the permanent magnet has conductivity property, losses by eddy currents are occurred in the permanent magnet. It is a major loss of a magnetic gear. Because the loss causes demagnetization by heat, it is mentioned a fatal problem at high speed. In this paper, the characteristics were analyzed by applying permanent magnets without conductivity. In addition, the analysis of the electromagnetic field as well as the mechanical loss were also considered to show which magnet type is advantageous.

Original language	English
Article number	8957474
Journal	IEEE Transactions on Applied Superconductivity
Volume	30
Issue number	4
DOIs	https://doi.org/10.1109/TASC.2020.2966180
State	Published - Jun 2020
Externally published	Yes

Keywords

bearing loss
Coaxial magnetic gear
ferrite magnet
housing loss
magnet eddy current loss
NdFeB magnet

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10.1109/TASC.2020.2966180

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title = "Comparison of Magnetic Gear Characteristics Using Different Permanent Magnet Materials",

abstract = "In the coaxial magnetic gear, the permanent magnets of each rotor face each other, and the driving frequency of each rotor has different values according to the gear ratio. The magnetic flux that changes with time is transmitted to each permanent magnet. If the permanent magnet has conductivity property, losses by eddy currents are occurred in the permanent magnet. It is a major loss of a magnetic gear. Because the loss causes demagnetization by heat, it is mentioned a fatal problem at high speed. In this paper, the characteristics were analyzed by applying permanent magnets without conductivity. In addition, the analysis of the electromagnetic field as well as the mechanical loss were also considered to show which magnet type is advantageous.",

keywords = "bearing loss, Coaxial magnetic gear, ferrite magnet, housing loss, magnet eddy current loss, NdFeB magnet",

author = "Park, \{Eui Jong\} and Jung, \{Sang Yong\} and Kim, \{Yong Jae\}",

note = "Publisher Copyright: {\textcopyright} 2002-2011 IEEE.",

year = "2020",

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doi = "10.1109/TASC.2020.2966180",

language = "English",

volume = "30",

journal = "IEEE Transactions on Applied Superconductivity",

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T1 - Comparison of Magnetic Gear Characteristics Using Different Permanent Magnet Materials

AU - Park, Eui Jong

AU - Jung, Sang Yong

AU - Kim, Yong Jae

PY - 2020/6

Y1 - 2020/6

N2 - In the coaxial magnetic gear, the permanent magnets of each rotor face each other, and the driving frequency of each rotor has different values according to the gear ratio. The magnetic flux that changes with time is transmitted to each permanent magnet. If the permanent magnet has conductivity property, losses by eddy currents are occurred in the permanent magnet. It is a major loss of a magnetic gear. Because the loss causes demagnetization by heat, it is mentioned a fatal problem at high speed. In this paper, the characteristics were analyzed by applying permanent magnets without conductivity. In addition, the analysis of the electromagnetic field as well as the mechanical loss were also considered to show which magnet type is advantageous.

AB - In the coaxial magnetic gear, the permanent magnets of each rotor face each other, and the driving frequency of each rotor has different values according to the gear ratio. The magnetic flux that changes with time is transmitted to each permanent magnet. If the permanent magnet has conductivity property, losses by eddy currents are occurred in the permanent magnet. It is a major loss of a magnetic gear. Because the loss causes demagnetization by heat, it is mentioned a fatal problem at high speed. In this paper, the characteristics were analyzed by applying permanent magnets without conductivity. In addition, the analysis of the electromagnetic field as well as the mechanical loss were also considered to show which magnet type is advantageous.

KW - bearing loss

KW - Coaxial magnetic gear

KW - ferrite magnet

KW - housing loss

KW - magnet eddy current loss

KW - NdFeB magnet

UR - https://www.scopus.com/pages/publications/85079575680

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DO - 10.1109/TASC.2020.2966180

M3 - Article

AN - SCOPUS:85079575680

SN - 1051-8223

VL - 30

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

IS - 4

M1 - 8957474

ER -

Comparison of Magnetic Gear Characteristics Using Different Permanent Magnet Materials

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