Detecting welded relay contacts using electrical pulse
US12422484B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2023 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | Dec 21, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/3278
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.