| 摘要 |
A paper-making machine or an off-line coater includes a rotatable drive unit and a rotatable driven element in the form of a roll, cylinder, pulley and/or gear. A clutch includes a rotatable input shaft coupled with the rotatable drive unit. At least one drive rotor is connected with the input shaft, and includes a plurality of magnetic coils. Each magnetic coil includes a coil winding. At least one driven rotor is positioned axially adjacent to at least one of the drive rotors. Each drive rotor includes a plurality of angularly spaced electrical conductors which are positioned adjacent to at least one of the drive rotors. A rotatable output shaft is coupled with the driven rotor and the rotatable driven element. A source of modulated direct current power is coupled with each of the magnetic coils, whereby a magnetic flux generated by the drive rotor and a coupling force between the drive rotor and the driven rotor can be varied.
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