Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Realization of a MRF-safety-clutch for high torsional moments based on a novel ball-clutch design

: Matthias, M.; Seipel, Björn; Jackel, Marco; Kloepfer, Jannes


Sodano, H.A. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.; American Society of Mechanical Engineers -ASME-:
Active and passive smart structures and integrated systems 2012 : 12 - 15 March 2012, San Diego, California, United States
Bellingham, WA: SPIE, 2012 (Proceedings of SPIE 8341)
ISBN: 978-0-8194-8998-2
Paper 83410P
Conference "Active and Passive Smart Structures and Integrated Systems" <2012, San Diego/Calif.>
Conference Paper
Fraunhofer LBF ()
photo; clutch design

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. The work was done within the Fraunhofer System Research for Electromobility FSEM, founded by the German Federal Ministry of Research and Technology.