[ Papers ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 27, No. 5, pp.417-423

ISSN: 2508-5107 (Online)

Print publication date 15 Oct 2018

Received 15 Aug 2018 Revised 27 Aug 2018 Accepted 28 Aug 2018

DOI: https://doi.org/10.7735/ksmte.2018.27.5.417

마그네틱 기어를 이용한 2단 감속 장치

정광석^a^{, *}

Characteristics of the Double Reduction Gearing System Using Magnetic Gears

Kwang Suk Jung^a^{, *}

aDepartment of Mechanical Engineering, Korea National University of Transportation, 50, Daehak-ro, Chungju, Chungbuk-do, 27469, Korea

Correspondence to: ^*Tel.: +82-43-841-5135 Fax: +82-43-841-5120 E-mail address: ksjung@ut.ac.kr (Kwang Suk Jung).

Abstract

Magnetic gears exhibit torque transfer densities that are comparable to those of helical gears because all the permanent magnets arranged along the circumferential direction contribute to power transmission. However, the reduction ratio that can be realized with a single magnetic gear is not theoretically limited; however, this parameter is not effective in a single gear owing to the decrease in the magnetic strength of the permanent magnet depending on its volume. High reduction ratio can be realized by connecting multiple magnetic gears in series. This study examines the power transfer characteristics of a double reduction gear unit with two magnetic gears having a reduction ratio of 1/3.25. The theoretical modeling, frequency response characteristics, and control test results of this system implemented using hardware are described in detail.

Keywords:

Double reduction gear, Frequency response function, Harmonic analysis, High reduction ratio, IP control, Magnetic gear

Acknowledgments

본 연구는 중소벤처기업부의 중소기업융복합기술개발사업[S2449707, 마그네틱기어 일체형 0.75 kW급 지능형 휠 구동시스템 개발]과 정부(교육부)의 재원으로 한국연구재단의 기초연구사업[NRF-2016R1D1A1B03930283]의 지원에 의한 연구임.

References

Qu, R., Li, D., Wang, J., 2011, Relationship Between Magnetic Gears and Vernier Machines, Electrical Machines and Sytems(ICEMS) 2011 International Conference, 1-6.
Jian, L., Chau, K., 2009, Design and Analysis of an Integrated Halbach-Magnetic-Geared Permanent-Magnet Motor for Electric Vehicles, J of Asian Electric Vehicles, 7:1 1213-1219.
Muruganandam, G, Jayakumar, K., 2012, A Novel Perpendicular Magnetic Gear With High Gear Ratio, European Journal of Scientific Research, 69:4 593-598.
Mezani, S., Atallah, K., Howe, D., 2006, A High-Performance Axial-Field Magnetic Gear, J. of Applied Physics, 99 08R303-08R303-3. [https://doi.org/10.1063/1.2158966]
Jian, L., Chau, K., 2010, Design and Analysis of a Magnetic-Geared Electronic-Continuously Variable Transmission System Using Finite Element Method, Progress in Electromagnetic Research, 107 47-61. [https://doi.org/10.2528/PIER10062806]
Rasmussen P., Andersen, T., Jorgensen, F., Nielsen, O., 2005, Development of a High-Performance Magnetic Gear, IEEE Transactions on Industry Applications, 41:3 764-770.
Jorgensen, F., Andersen, T., Rasmussen, P., 2008, The Cycloid Permanent Magnetic Gear, IEEE Transactions on Industry Applications, 44:6 1659-1665.
Lee, S. J., Jung, K. S., 2015, Characteristic Study of a Magnet Gear Speed Reducer With a Unified Harmonic Modulator, J. of the Korean Society of Manufacturing Technology Engineers, 24:3 348-354.
Ogata, K., 1990, Modern Control Engineering, Prentice-Hall, USA.