Discharge Detection Device
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United States of America Patent
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Issued Date -
Feb 1, 2024
app pub date -
Dec 1, 2021
filing date -
Dec 4, 2020
priority date (Note) -
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Abstract
Provided is a discharge detector for detecting discharge occurred in a circuit with an electrically connected load based on a noise in a high frequency band superimposed on an alternating current power source supplied to the circuit. The discharge detector includes a high pass filter configured to extract a frequency component in a high frequency band from the alternating current power source; an amplifier configured to amplify an output of the high pass filter; a smoothing section configured to smooth an output of the amplifier; a phase division section configured to specify a peak time domain including time before and after a peak value and a zero cross time domain including time before and after a 0 value based on a value in one cycle of a voltage or current of the alternating current power source; and a determination section configured to determine whether discharge has occurred based on a difference between a first output of the smoothing section in the peak time domain and a second output of the smoothing section in the zero cross time domain.
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