The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Characteristic Analysis of High Speed Coaxial Magnetic Gear by Two-Dimensional Finite Element Analysis

2차원 유한요소 해석을 이용한 고속용 마그네틱 기어의 형상에 따른 특성 해석

  • Lee, Jeong-In (Dept. of Electrical Engineering, Chungnam National University) ;
  • Shin, Kyung-Hun (Dept. of Electrical Engineering, Chungnam National University) ;
  • Bang, Tae-Kyoung (Dept. of Electrical Engineering, Chungnam National University) ;
  • Lee, Sang-Hwa (Dept. of Electrical Engineering, Chungnam National University) ;
  • Choi, Jang-Young (Dept. of Electrical Engineering, Chungnam National University)
  • Received : 2018.03.22
  • Accepted : 2018.12.19
  • Published : 2019.01.01
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Abstract

In this paper, the characteristics of the coaxial magnetic gear according to the shape of the same gear ratio are analyzed using the two - dimensional finite element analysis. The rotor shape is SMCMG, CPCMG and RCMG. After this we analyzed the characteristics according to three shapes. Also, the amount of permanent magnet used in each shape was compared. Next, characteristics analysis of the magnetic gear according to the shape at the same torque was performed. And the total weight and efficiency of the magnetic gears were compared and verified.

Keywords

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그림 1 기계식 기어의 구조 [1] Fig. 1 Structure of mechanical gear [1]

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그림 3 SMCMG의 구조 및 자속밀도 Fig. 3 Structure and magnetic flux density of SMCMG

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그림 4 SMCMG 해석 결과 (a) 탈출 토크 특성 (b) 부하에 따른 토크 특성 (c) 부하에 따른 외측 회전속도 특성 (d) SMCMG 손실 및 토크 리플과 THD 특성 Fig. 4 Analysis result of SMCMG (a) characteristics of pull-out torque (b) characteristics of torque according to load (c) characteristics of outer rotation speed according to load (d) characteristics of SMCMG loss and torque ripple and THD

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그림 5 CPCMG의 구조 및 자속밀도 Fig. 5 Structure and magnetic flux density of CPCMG

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그림 6 CPCMG 해석 결과 (a) 탈출 토크 특성 (b) 부하에 따른 토크 특성 (c) 부하에 따른 외측 회전속도 특성 (d) CPCMG 손실 및 토크 리플과 THD 특성 Fig. 6 Analysis result of CPCMG (a) characteristics of pullout torque (b) characteristics of torque according to load (c) characteristics of outer rotation speed according to load (d) characteristics of CPCMG loss and torque ripple and THD

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그림 7 RCMG의 구조 및 자속밀도 Fig. 7 Structure and magnetic flux density of RCMG

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그림 8 RCMG 해석 결과 (a) 탈출 토크 특성 (b) 부하에 따른 토크 특성 (c) 부하에 따른 외측 회전속도 특성 (d) RCMG 손실 및 토크 리플과 THD 특성 Fig. 8 Analysis result of RCMG (a) characteristics of pullout torque (b) characteristics of torque according to load (c) characteristics of outer rotation speed according to load (d) characteristics of RCMG loss and torque ripple and THD

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그림 10 동일 토크시 CPCMG 및 RCMG 해석 결과 (a) 부하에 따른 CPCMG 토크 특성 (b) CPCMG 손실 및 토크리플과 THD 특성 (c) 부하에 따른 RCMG 토크 특성 (d) RCMG 손실 및 토크리플과 THD 특성 Fig. 10 Analysis results of CPCMG and RCMG at the same torque (a) characteristics of CPCMG torque according to load (b) characteristics of CPCMG loss and torque ripple and THD (c) characteristics of RCMG torque according to load (d) characteristics of RCMG loss and torque ripple and THD

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그림 11 해석결과에 따른 마그네틱 기어 효율 Fig. 11 Magnetic gear efficiency according to analysis result

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그림 9 형상에 따른 마그네틱 기어의 동일 토크 특성 (a) 외측 토크 (b) 내측 토크 Fig. 9 Characteristics of Same torque at the magnetic gears according to shape (a) outer torque (b) inner torque

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그림 2 마그네틱 기어의 구조 Fig. 2 Structure of magnetic gear

표 1 동축 마그네틱 기어의 설계 사양 Table 1 Design specification of coaxial magnetic gear

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표 3 동축 마그네틱 기어의 형사에 따른 동일 설계 사양시 영구자석 및 철심 사용량 Table 3 Permanent magnet and core usage in the same design specification according to the shape of coaxial magnetic gear

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표 4 동축 마그네틱 기어의 형사에 따른 동일 토크시 영구자석 및 철심 사용량 Table 4 Permanent magnet and core usage in the same torque according to the shape of coaxial magnetic gear

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표 2 동축 마그네틱 기어의 형상에 따른 기어비 Table 2 Gear ratio according to the shape of coaxial magnetic gear

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