한국생산제조학회 학술지 영문 홈페이지
[ Technical Papers ]
Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 29, No. 5, pp.406-412
ISSN: 2508-5107 (Online)
Print publication date 15 Oct 2020
Received 21 Jul 2020 Revised 24 Aug 2020 Accepted 01 Sep 2020
DOI: https://doi.org/10.7735/ksmte.2020.29.5.406

편심 자석 로터의 내·외측 자기장 변조를 이용한 마그네틱 하모닉 기어

원훈희a ; 정광석a, *
Magnetic Harmonic Gear that Utilizes the Inner and Outer Magnetic Field Modulation of Eccentric Magnet Rotor
Hoon Hee Wona ; Kwang Suk Junga, *
aDepartment of Mechanical Engineering, Korea National University of Transportation

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

Abstract

In a magnetic harmonic gear, the magnetic field on the high-speed side is modulated by the air-gap movement according to the rotation of the eccentric body. Owing to the modulated magnetic field, the permanent magnet layer outside the high-speed rotor rotates in synchronization with the stator composed of another permanent magnet. Therefore, transferring only the synchronous rotational motion outside the eccentric body to the output side requires a complicated conversion mechanism. In this study, we propose a magnetic harmonic gear that utilizes both the inner and outer magnetic fields of an eccentric permanent magnet layer. The outer magnetic field is utilized for the deceleration function as in the existing harmonic gear, whereas the additional inner magnetic field is utilized to extract the rotational motion. The topology of the system is verified by the harmonic analysis of the air-gap magnetic field and with experimental set-up.

Keywords:

Eccentric rotation, Harmonic filtering, Magnetic harmonic gear, Noncontact power transmission, Sinusoidal air-gapping

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Hoon Hee Won

M.Sc. candidate in the Department of Mechanical Engineering, Korea National University of Transportation.His research interest is magnetic gear-embedded motor.

E-mail: rhgns0934@ut.ac.kr

Kwang Suk Jung

Professor in the Department of Mechanical Engineering, Korea National University of Transportation.His research interest include electromagnetic energy conversion device, magnetic gear, power transmission of electric vehicle, and magnetic levitation application.

E-mail: ksjung@ut.ac.kr