Discharge circuits for EMI filters capacitors and methods thereof
US9148049B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 11, 2013 |
| Grant date | Sep 29, 2015 |
| Priority date | — |
| Expiry date | Dec 6, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/322
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A discharge circuit for an EMI filter capacitor, wherein the EMI filter capacitor is coupled between input terminals of a switching converter. The discharge circuit has a detecting circuit and a current source. The detecting circuit is configured to detect whether an electrical source is coupled to the input terminals of the switching converter. The current source is coupled between the input terminals of the switching converter and a power supply capacitor, and is configured to provide a power supply voltage across the power supply capacitor. When the electrical source is uncoupled from the input terminals of the switching converter, the EMI filter capacitor is discharged by the current source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.