Pitch control battery backup methods and system
US7740448B2 · kind B2 · utility
14Cited by
19References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2005 |
| Grant date | Jun 22, 2010 |
| Priority date | — |
| Expiry date | Feb 17, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/76
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for controlling a pitch control system of a wind turbine includes providing a charged backup battery configured to supply no energy to a DC link when full AC input power is available, wherein the DC link includes a DC link capacitor. The method further includes using energy stored in the DC link capacitor to operate a pitch control system during a loss or dip of AC input power, and maintaining charge on the DC link capacitor using the charged backup battery as voltage across the DC link capacitor drops during the operation of the pitch control system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.