Arc detection
US9739821B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2014 |
| Grant date | Aug 22, 2017 |
| Priority date | — |
| Expiry date | May 27, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/56
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a method for detection of an arc in a current path of a converter arrangement (2) for converting a DC input power to an output power, an arc is detected by sensing the current (4) in the current path by means of a current transformer (11), filtering the current signal (4′) with an analog band pass filter (14), converting the analog filtered current signal (4″) into a digital current signal (4′″), determining the harmonic content (19) of the digital current signal (4′″) and then deciding whether an arc exists if the harmonic content (19) exceeds a threshold, where the threshold is determined at the beginning as a multiple of the average harmonic content during a certain period of time of the current signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.