Methods and apparatus for controlling the engagement of gap-type electromagnetic couplings
USRE33140E · kind E · reissue
4Cited by
6References
32Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1987 |
| Grant date | Jan 2, 1990 |
| Priority date | — |
| Expiry date | Mar 31, 2007 |
Classification
- Technology area (CPC —)General
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.