Methods and apparatus for controlling the engagement of gap-type

Details Methods and apparatus for controlling the engagement of gap-type Methods and apparatus for controlling the engagement of gap-type

1987-03-31

1990-01-02

Hix, L. T.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

Systems for magnetizing, demagnetizing, or controlling the...

192 356, 192 84R, 192 84C, H01F 718

Patent

active

RE0331406

ABSTRACT:
A control unit and method for operating a gap-type electromagnetic clutch or brake is provided which reduces audible chatter, screeching caused by belt slippage and related wear and tear on the driving and driven components. The operating winding of the clutch or brake is energized to cause the gap between an armature and rotor to close, energization of winding is then reduced to initially reduce the torque coupling between the armature and rotor and finally energization of the winding is gradually increased to full energization so as to provide a gradually increasing torque coupling between the armature and rotor.

REFERENCES:
patent: 2808017 (1957-10-01), Harter
patent: 3268045 (1966-08-01), Poumakis
patent: 3581156 (1971-05-01), Dolbachian et al.
patent: 4160498 (1979-07-01), Newton et al.
patent: 4227230 (1980-10-01), Bray
patent: 4376476 (1983-03-01), Hagiri

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