Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1984-02-17
1985-04-02
Moose, Jr., Harry E.
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
045090912
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 the 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: 2808917 (1957-10-01), Harter
patent: 3581156 (1971-05-01), Dolbachian
patent: 4160498 (1979-07-01), Newton et al.
patent: 4376476 (1983-03-01), Hagiri
Moose Jr. Harry E.
Warner Electric Brake & Clutch Company
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