Apparatus and method for managing a backup power supply for an aircraft cockpit voice recorder
US8013471B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2009 |
| Grant date | Sep 6, 2011 |
| Priority date | — |
| Expiry date | Feb 13, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/345
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Charge on a storage capacitor in a backup power supply is managed by discharging the capacitor into an aircraft recorder that is to be powered when a primary power source fails. During the discharging, a first amount of energy discharged from the capacitor is measured along with the length of the discharge time. The first amount of energy and the discharge time are employed to define a target energy level to which the capacitor should be charged to enable the backup power supply to adequately power aircraft recorder. Then charging of the capacitor commences while a second amount of energy stored in the capacitor is measured. The capacitor charging terminates when the second amount of energy reaches the target energy level. Definition of the target energy level also may take into account variation in temperature of the capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.