Structure and function
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 ring coil which is supplied with direct current for actuation. There is a magnetized powder (ferro/chrome) in the air gap between the rotors. 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 creates a more or less strong braking adhesion between the two rotors, which achieve a transmission torque proportional to the current.
Advantages
- Silent operation
- Torque directly proportional to the excitation current
- Torque independent of speed (from 30 min)
- Robust construction, suitable for permanent slipping
- High torque control range of approx. 1:50
Applications
- Engaging and disengaging the clutch
- Brakes
- Torque control, torque limitation
- Tension control during winding and unwinding
- Targeted braking and starting
- of moments of inertia and masses
