Discharge of back-up capacitor by constant current
US9966776B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2016 |
| Grant date | May 8, 2018 |
| Priority date | — |
| Expiry date | Nov 5, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/345
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrical arrangement includes a high-voltage battery and a number of electrical utility arrangements connected to the battery via a main switch and a downstream back-up capacitor. A discharge circuit is connected to the capacitor and has a discharge path with an ohmic discharge resistor. In normal mode no current flows in the discharge resistor. Opening the main switch effects a transition from normal mode to special mode, while the discharge path is energized and electrical energy stored in the capacitor is converted into thermal energy by the discharge resistor. The discharge circuit has a voltage converter between the high-voltage side of the capacitor and the discharge path. The voltage converter has a first semiconductor switch for discharging the capacitor clock-controlled such that an electrical output voltage at the discharge path constantly has a rated value so long as a capacitor voltage at the capacitor is above the rated value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.