Low-loss control of DC-DC converters in an energy storage system
US7990117B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 7, 2008 |
| Grant date | Aug 2, 2011 |
| Priority date | — |
| Expiry date | Nov 11, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1582
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An energy storage system including a buck-boost DC-DC converter operable so as to minimize switching loses. The system includes a first energy storage device, e.g., a bank of ultracapacitors, and a second energy storage device, e.g., a second bank of electrolytic capacitors. Both first and second energy storage devices are connected to the DC-DC converter. The DC-DC converter is operated in a non-standard manner so as to reduce switching and other losses. In particular, the DC-DC converter may be operated in an alternate buck mode so as to force on a switch S2 through which energy flows from the first energy storage device to the second energy storage device. The switch S2 is forced on for so long as the voltage on the second energy storage device remains within a first operating window.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.