DETECTION CIRCUIT FOR DC CURRENT ELECTRIC ARC, AND MICROPROCESSOR

WIPO Patent Application WO/2017/219730

A1

Disclosed are a detection circuit for a DC current electric arc, and a microprocessor, resolving an existing problem of low accuracy in detection circuit detection results for DC current electric arcs. The circuit comprises: a current sampling circuit, a first circuit, a second circuit, and a microprocessor. The current sampling circuit samples the DC current, and outputs a current sampling signal of the DC current. The first circuit receives and processes the current sampling signal, and outputs a time domain signal comprising at least one pulse, wherein the at least one pulse indicates a change rate of the current sampling signal in the time domain. The second circuit receives, amplifies and filters the current sampling signal, and outputs a frequency domain signal of the current sampling signal. The microprocessor receives the time domain signal and the frequency domain signal, and counts electric arc events according to analysis results of the time domain signal and the frequency domain signal. If a count total of electric arc events meets a preset condition, an electric arc is determined to be present in the DC current.

JPH1078460	DC COMPONENT-REMOVING DEVICE AND ELEMENT-CONSTANT MEASURING DEVICE
JP7404983	Power supply control device

HAN JINTAO (CN)
ZHANG SHENGJIE (CN)

PCT/CN2017/079602

December 28, 2017

April 06, 2017

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HUAWEI TECH CO LTD (CN)

G01R19/00

CN106199131A	2016-12-07
CN103245897A	2013-08-14
CN101673934A	2010-03-17
CN102253293A	2011-11-23
CN103812081A	2014-05-21
CN105093082A	2015-11-25
US20090284265A1	2009-11-19

See also references of EP 3462185A4

TDIP & PARTNERS (CN)

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