Abnormality Detection Circuit And Abnormality Detection Method
Number of patents in Portfolio can not be more than 2000
United States of America
Stats
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N/A
Issued Date -
Jun 30, 2022
app pub date -
Dec 23, 2021
filing date -
Dec 23, 2021
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
An abnormality detection circuit includes an AC power source coupled to a load via first and second wiring lines, a first relay contact disposed in the middle of the first wiring line, a second relay contact disposed in the middle of the second wiring line, a comparative voltage detection circuit to which a voltage is applied from the AC power source irrespective of whether the first and second relay contacts are open or closed, a first voltage detection circuit to which a voltage is applied from the AC power source when the first relay contact is closed, a second voltage detection circuit to which a voltage is applied from the AC power source when the second relay contact is closed, and an abnormality detector that detects abnormalities of the first relay contact by comparing the voltage applied to the comparative voltage detection circuit with the voltage applied to the first voltage detection circuit and detects abnormalities of the second relay contact by comparing the voltage applied to the comparative voltage detection circuit with the voltage applied to the second voltage detection circuit.
First Claim
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