Electromagnetic clutch with permanent magnet brake

Details Electromagnetic clutch with permanent magnet brake Electromagnetic clutch with permanent magnet brake

1991-10-11

1992-06-09

Braun, Leslie A.

192 clutches and power-stop control

Clutch and brake

Sliding operation

192 12D, 56 113, F16D 6706

Patent

active

051199181

ABSTRACT:
Energization of an electric coil produces flux for attracting an armature of a clutch into engagement with a rotor in order to couple an input shaft to an output pulley. When the coil is de-energized, two angularly spaced permanent magnets pull the armature away from the rotor and into engagement with fixed pole pieces which cause a braking torque to be applied to the output pulley. The magnets are located closely adjacent one another and only along a short arc of the armature in order to enable the flux of the coil to overcome the flux of the magnets and effect easy release of the brake and engagement of the clutch when the coil is energized.

REFERENCES:
patent: 2612248 (1952-09-01), Feiertag
patent: 2618368 (1952-11-01), Hoover
patent: 2646145 (1953-07-01), Durston
patent: 3642104 (1972-02-01), Schafer
patent: 3945476 (1976-03-01), De Jong
patent: 4300082 (1981-11-01), Angerbach et al.
patent: 4566574 (1986-01-01), Marshall

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