Design and performance of a MR torque transfer device

Kevin Molyet, Constantin Ciocanel, Hideki Yamamoto, Nagi Naganathan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations


Magnetorheological (MR) fluids possess the unique ability to undergo dramatic and nearly completely reversible changes in their rheological properties under the application of a magnetic field. These controllable fluids can serve as quiet, rapid interfaces between electronic controls and mechanical systems. One area of application is to use these fluids in torque transfer devices, such as clutches and brakes. After determining MR fluid properties and behavior using a rheometer, a parallel disk type MR clutch was successfully developed, which utilized a stationary electromagnetic coil. Finite element analysis was used to design the coil and clutch assembly in order to maximize the magnetic field generated within the MR fluid. The resulting magnetic field was uniform over the active portion of the clutch, easily controllable by adjusting the current passing through the coil, and provided a large range of field strength values. The experimentally measured output torque was generally in good agreement with predicted values. This work will detail the design considerations and methodology used to develop this clutch, which can be extended to the design of other MR devices.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME Aerospace Division 2005
Number of pages7
StatePublished - 2005
Event2005 ASME International Mechanical Engineering Congress and Exposition, IMECE 2005 - Orlando, FL, United States
Duration: Nov 5 2005Nov 11 2005

Publication series

NameAmerican Society of Mechanical Engineers, Aerospace Division (Publication) AD
Volume70 AD
ISSN (Print)0733-4230


Other2005 ASME International Mechanical Engineering Congress and Exposition, IMECE 2005
Country/TerritoryUnited States
CityOrlando, FL


  • Clutch
  • Magnetorheological (MR) fluid
  • Torque prediction

ASJC Scopus subject areas

  • Mechanical Engineering
  • Space and Planetary Science


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