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Updated: Feb 3, 2026

Magnetic Tweezers for the Measurement of Twist and Torque
Published on: May 19, 2014
Towards Miniaturization of Magnetic Gears: Torque Performance Assessment
Efren Diez-Jimenez1, Rocio Sanchez-Montero2, Miriam Martinez-Muñoz3
1Departamento de Teoría de la Señal y Comunicaciones, Universidad de Alcalá, Ctra. Madrid-Barcelona, Km 33,66, Alcalá de Henares 28871, Spain. efren.diez@uah.es.
Abstract:
Magnetomechanical components can be a good solution in order to reduce, or even completely avoid, friction phenomena in micro-electro-mechanical systems (MEMS) since they can transmit forces through magnetic fields without contacts. In this communication, electromagnetic simulations of the expected specific torque of a coaxial magnetic gear are given. The results show that micromagnetic gears (3 mm of diameter) could provide a specific torque up to 8.98 Nm/kg, several times larger than the specific torque that microgears (<9 mm of diameter) can provide. This implies that micromagnetic gears could provide speed conversion without contact in the teeth, avoiding corresponding friction, but also that it would even improve the specific torque transmission with respect to contact microgears.
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