Charging efficiency using selectable isolation
US8810208B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2011 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | Jun 8, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/13
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The apparatus for charging an energy storage system (ESS) from an AC line voltage includes a boost stage for converting the AC line voltage to a first ESS charging voltage; an isolation stage, coupled to the boost stage, for converting the first ESS charging voltage to a second ESS charging voltage with the second ESS charging voltage less than the first ESS charging voltage, the isolation stage removing a common mode current between the ESS and the boost stage; a configurator, responsive to a control signal, to set a direct communication of the first ESS charging voltage to the ESS in a bypass mode and to open the direct communication of the first ESS charging voltage to the ESS in an isolation mode; and a controller, coupled to the configurator, for setting the modes responsive to a battery voltage, a peak of the AC line voltage, and a total leakage current at an input of the AC line voltage, the controller asserting the control signal to the configurator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.