DETECTING WELDED RELAY CONTACTS USING ELECTRICAL PULSE
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United States of America
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Issued Date -
Dec 26, 2024
app pub date -
Jun 21, 2023
filing date -
Jun 21, 2023
priority date (Note) -
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Abstract
A system includes a relay system and a controller. The relay system includes a plurality of relays. The controller is configured to transmit a close signal to a first relay of the plurality of relays, and to transmit a pulse signal to a second relay of the plurality of relays. The pulse signal is configured to have a sufficient electrical magnitude and duration to close the second relay when the second relay has an electrical weld, and to have an insufficient electrical magnitude and duration to close the first contact and the second contact of the second relay when the second relay has no electrical weld. The controller is also configured to measure a current flow through the second relay in response to the pulse signal; and based on the current flow through the second relay, determine whether the electrical weld exists in the second relay.
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