Safety capacitor discharging method and apparatus for AC-to-DC converters
US8305047B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2009 |
| Grant date | Nov 6, 2012 |
| Priority date | — |
| Expiry date | Jul 17, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/322
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention discloses a safety capacitor discharging method for AC-to-DC converters, wherein the AC-to-DC converters have a safety capacitor connected between two line voltages, the method comprising the steps of: detecting at least one line voltage to generate a line-off signal, wherein the line-off signal is at a first state when the peak voltage of the at least one line voltage is above a reference voltage, and the line-off signal is at a second state when the peak voltage of the at least one line voltage is below the reference voltage; and performing discharge of the safety capacitor by generating a conduction path between two plates of the safety capacitor when the line-off signal is at the second state. The present invention also provides a safety capacitor discharging apparatus for AC-to-DC converters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.