The magnetic particle brake and clutch is simple in design and achieves a high torque in a small space. The unit is made up of 2 independently mounted rotors. The outer rotor contains a toroidal coil which is supplied with direct current for actuation. The air gap between the rotors contains a magnetized powder (ferro/chrome). When the coil is energized, the magnetization causes the powder grains to form a kind of chain, whereby the stiffness of this chain varies with the magnetic field and is directly proportional to the level of the applied current. This results in a more or less strong braking adhesion between the two rotors, which achieve a transmission torque proportional to the current.

Advantages:
noiseless actuation, torque directly proportional to the excitation current, torque independent of speed (from 30 min), robust design, suitable for continuous slip, high torque control range of approx. 1:50

The magnetic particle brakes are designed for a temperature range of -20 to +90 °C.