Abstract: The invention concerns an adjustable hysteresis driver, with a rotor component (5) on the input side that can be driven and/or a stator component (7?, 7?), with an armature component (8) on the output side in fixed connection with a shaft (4), with a hysteresis component (9) connected to the armature component (8), the stator component (7?, 7?) comprising an electromagnet (7a) or permanent magnet (18) by means of which a magnetic flux can be induced in the rotor component (5) and/or the stator component (7?, 7?), and in which the torque that can be transmitted can be adjusted by electromagnetic or electro-mechanical means. The purpose of the invention is to propose a hysteresis driver with improved adjustability.

Abstract: The planetary gear according to the invention comprises a sun gear (2) connected to a driven central shaft (20), a ring gear (12), a group of first stepped planetary gears (8, 10) and a group of second stepped planetary gears (4, 6). The large step wheels (4) of the second stepped planetary gears engage the sun gear (2), the small step wheels (6) of the second stepped planetary gears simultaneously engage a pair of adjoining large step wheels (8) of the first stepped planetary gears and all small step wheels (10) of the first stepped planetary gears engage the ring gear (12). The gear allows for high transmission ratios having a small size and low inertia moment and offers excellent properties in relation to efficiency and transmission reliability.