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The novel MRF-ball-clutch design

A MRF-safety-clutch for high torque applications
 
: Jackel, Marco; Kloepfer, Jannes; Matthias, M.; Seipel, Björn

:

Unal, H.I.:
13th International Conference on Electrorheological Fluids and Magnetorheological Suspensions (ERMR2012). Proceedings : 2 - 6 July 2012, Ankara, Turkey
Bristol: IOP Publishing, 2013 (Journal of physics. Conference series 412)
ISSN: 1742-6588
Art.012051, 8 pp.
International Conference on Electrorheological Fluids and Magnetorheological Suspensions (ERMR) <13, 2012, Ankara>
English
Conference Paper, Journal Article
Fraunhofer LBF ()
clutch design; torque applications

Abstract
This paper describes the development of a safety-clutch by using magnetorheological fluids (MRF) to switch the transmission torque between a motor and a generator in a bus-like vehicle. The clutch is based on a new design combining an axial MRF-actuator and a ball coupling mechanism. This so called "MRF-ball-clutch" avoids the disadvantages of traditional bell-or disc-MRF-clutch designs where the torque is transmitted by the MRF which leads to a self-heating due to the shearing forces in the fluid and a more or less significant drag torque caused by limitations of the relation between minimal and maximal transmittable torque. The safety clutch based on the new MRF-clutch design requires a minimum of power consumption and allows switching high torsional moments in a very compact, lightweight and robust design.

: http://publica.fraunhofer.de/documents/N-241961.html