Internal protection circuit for electrically driven device
US5200872A · kind A · utility
82Cited by
26References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1992 |
| Grant date | Apr 6, 1993 |
| Priority date | — |
| Expiry date | Feb 7, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Protection for an encased motor driven device is enhanced by utilizing additional sensors with associated resistance heaters to actuate the thermally responsive contacts of the internal line break. The sensors and heaters are powered from an auxiliary winding in the motor coils. When applied to a hermetic scroll compressor, the compressor can be protected against reverse rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.