Patent · US Active

Method and circuit arrangement for detecting an arc, and photovoltaic (PV) inverter having a corresponding circuit arrangement

US12267040B2 · kind B2 · utility

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0References

18Claims

0Family size

Assignee

SMA Solar Technology AG · DE

Inventors

Rainer Schmitt · Meckenheim, DE
Marcel Kratochvil · Kassel, DE
Sybille Pape · Vellmar, DE

Key dates

Filing date	Jul 15, 2022
Grant date	Apr 1, 2025
Priority date	—
Expiry date	Apr 13, 2043

Classification

Technology area (CPC H)Electricity
CPC primaryH02J2300/24
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method for detecting an arc in a circuit including a DC load, a DC source supplying the DC load, and a circuit arrangement between the DC source and the DC load is provided. A power flow between the DC source and an output of the circuit arrangement is cyclically interrupted by a switching circuit, such that the power flow is enabled in an active time window with the first period Δt1 and suppressed in an inactive time window with the second period Δt2. Detection of a current I and/or a voltage U in two consecutive active time windows and comparison of the detected values of current I and/or voltage U of the active time window with the corresponding detected values from the preceding active time window can signal an arc if these values of the active time window differ from the corresponding values of the preceding active time window by more than a threshold value.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.