Closed loop power factor control for drilling rigs
US4482857A · kind A · utility
10Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1983 |
| Grant date | Nov 13, 1984 |
| Priority date | — |
| Expiry date | Aug 8, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E40/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power factor controller for alternating current/direct current drilling rigs is provided which utilizes a uniquely controlled, unloaded, over-excited generator to provide reactive power to maintain the rig's power factor within prescribed limits during peak demand operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.