Methods and apparatus for controlling the engagement of gap-type electromagnetic couplings
US4509091A · kind A · utility
28Cited by
4References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1984 |
| Grant date | Apr 2, 1985 |
| Priority date | — |
| Expiry date | Feb 17, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2027/008
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.