Schaltbare magnetorheologische Drehmoment- oder Kraftuebertragungsvorrichtung, deren Verwendung sowie magnetorheologisches Drehmoment- oder Kraftuebertragungsverfahren

DE 102009007209 A1 UPAB: 20100827 NOVELTY - The transmission device has two device parts that are separated by a transmission gap (2) for transmitting torque. The gap is filled with a magnetorheological material (2MRF). The device parts rotate relative to each other about a rotational axis (R). A magnetic circuit system has a permanent magnet (6) with variable magnetization and an electromagnet (1) for generating the magnetic flux in the gap. The electromagnet and the permanent magnet are designed such that the magnetization of the permanent magnet is adjusted by changing the coil current of the electromagnet. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) a magnetorheological force transmission device (2) a magnetorheological torque transmission method (3) a magnetorheological force transmission method. USE - Magnetorheological torque transmission device e.g. magnetic clutch, brake, damping device such as electrically controllable damping device and/or shock absorber, impact absorber, vibration damper e.g. rotary vibration damper, clamping or locking device, safety switch, haptic device and human-machine interface element (all claimed). ADVANTAGE - The transmission device accurately transmits the torque with minimum power requirement. The electromagnet and the permanent magnet are designed such that the magnetization of the permanent magnet is adjusted by changing the coil current of the electromagnet, thus ensuring failure proof operation of the transmission device