Magnetic particle clutch
A magnetic particle clutch is a special type of electromagnetic clutch which does not use friction plates. Instead, it uses a fine powder of magnetically susceptible material (typically stainless steel) to mechanically link an otherwise free wheeling disc attached to one shaft, to a rotor attached to the other shaft.
When a magnetic field is applied to the powder, it forms chains connecting the disc and rotor. The strength of the chains depends on the strength of the magnetic field.
Some advantages over a friction plate clutch include:
- it doesn't exhibit stick-slip phenomenon or stiction
- the torque may be easily and quickly controlled
- it is more resistant to wear
- it may be used for continuous slip applications
- it has a very fast response time
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