Research Projects
Magnetic Gear
Contact-free torque transmission — magnetic gearing for backdrivable, robust actuation.
Overview
Magnetic gears transmit torque without physical contact, eliminating wear, backlash, and jamming while providing inherent overload protection — ideal properties for robot actuation.
We developed mechanically variable magnetic gear transmissions, magnetic-gear-based actuators with disturbance-observer torque control exploiting the magnetic spring, and a coaxial magnetic gear tool-changing system.
Demonstrations
Mechanical Variable Magnetic Gear Transmission
Coaxial Magnetic Gear-based Tool-Changing System
Representative Publications
H. Song, E. Lee, H.-T. Seo*, S. Jeong*
IEEE Robotics and Automation Letters · 2023
Mechanical Variable Magnetic Gear Transmission: Concept and Preliminary Research
E. Lee, H. Song, J. Jeong, S. Jeong*
IEEE Robotics and Automation Letters · 2022
Patents
- Hybrid transmission combining magnetic and mechanical gearsFiledKR 10-2025-0025130
- End-effector exchange systemFiledKR 10-2024-0038169
- Control system and method for a coaxial magnetic gear-based drive module ↗RegisteredKR 10-2023-0059085
- Magnet transmissionFiledKR 10-2022-0063534
- Transmission using magnetic gearsFiledKR 10-2021-0155810
Funding
- NRF Basic Research Program (2021.06 – 2024.02)