US 11,867,771 B2
Methods and devices for detecting an electrical arc
Felix Kaiser, Munich (DE); Christoph Grund, Munich (DE); Goran Keser, Munich (DE); and Christopher Roemmelmayer, Munich (DE)
Assigned to Infineon Technologies AG, Neubiberg (DE)
Filed by Infineon Technologies AG, Neubiberg (DE)
Filed on Jan. 31, 2022, as Appl. No. 17/589,751.
Claims priority of application No. 102021103121.4 (DE), filed on Feb. 10, 2021.
Prior Publication US 2022/0252679 A1, Aug. 11, 2022
Int. Cl. G01R 31/52 (2020.01)
CPC G01R 31/52 (2020.01) 21 Claims
OG exemplary drawing
 
1. A method for detecting an arc, the method comprising:
applying a first wavelet transformation with a first mother wavelet to a chronological sequence of current measurements of a current through a lead to obtain first wavelet coefficients,
applying a second wavelet transformation with a second mother wavelet different from the first mother wavelet to the chronological sequence of current measurements to obtain second wavelet coefficients, and
determining whether an arc is present based on the first wavelet coefficients and the second wavelet coefficients, wherein the method further comprises:
forming a set of first values based on the first wavelet coefficients, wherein a number of the first values is less than a number of the first wavelet coefficients, and/or
forming a set of second values based on the second wavelet coefficients, wherein a number of the second values is less than a number of the second wavelet coefficients, and/or
forming a set of third values based on third wavelet coefficients, wherein a number of third values is less than a number of the third wavelet coefficients, wherein determining whether the arc is present is based on the first values, the second values and/or the third values.