The novel MRF-ball-clutch design – a MRF-safety-clutch for high torque applications

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...

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Bibliographic Details
Published in:Journal of physics. Conference series 2013-01, Vol.412 (1), p.12051-8
Main Authors: Jackel, M, Kloepfer, J, Matthias, M, Seipel, B
Format: Article
Language:English
Subjects:
Actuators
Clutches
Drag
Fluid flow
Lightweight
Magnetorheological fluids
Physics
Power consumption
Robust design
Safety
Shear forces
Torque
Transmissions (automotive)
Weight reduction
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Summary: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.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/412/1/012051