Cycloidal Magnetic Gear Utilizing Magnetic Repulsion Characteristics

Pin Hao Liao, Mi Ching Tsai, Hsueh Chi Lu, Po-Wei Huang, Tsung-Wei Chang

Research output: Contribution to journalArticlepeer-review


The use of non-contact magnetic transmission, such as Coaxial Magnetic Gears (CMGs), has become increasingly significant in the industrial sector. However, designing for high reduction ratios poses CMGs with strict challenges in size and manufacturing. This paper proposes a Repulsive-type Cycloidal Magnetic Gear (RCMG) as a means to address the increasing demand for high reduction ratios and longer lifespans prevalent in recent years. Transmission is achieved through the principle of magnetic repulsion, resulting in a reduction ratio of 19:1. In addition, this study explores the two modes of operation of the RCMG through analytical derivations and FEA software. Characteristics such as bearing load, slip torque, and reduction ratio were analyzed. This framework not only achieves a high reduction ratio but also significantly reduces the bearing load. Finally, this paper prototypes a model to validate the slip torque and reduction ratio.

Original languageEnglish
Pages (from-to)1
Number of pages1
JournalIEEE Transactions on Magnetics
Publication statusAccepted/In press - 2024

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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