Electrical Contactor Health Monitoring

JP2025507322A5Pending Publication Date: 2026-01-07CATERPILLAR INC

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Patent Information

Application Number: JP2024546462
Authority / Receiving Office: JP · JP
Patent Type: Applications
Current Assignee / Owner
Priority Date: 2022-02-17
Filing Date: 2023-01-23
Publication Date: 2026-01-07

Application Information

Patent Timeline

17 Feb 2022

Priority

23 Jan 2023

Application

JP2024546462

07 Jan 2026

Publication

JP2025507322A5

IPC: H01H9/54; H02H7/00; H01H1/00; G01R31/00

CPC: G01R31/3275; H01H1/0015; G01R31/333; H01H3/001; G01R31/3333

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Application Domain

Emergency protective circuit arrangements Contact testing/inspection

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AI Technical Summary

Technical Problem

Electrical contactors in work site equipment have finite lifetimes that are current and voltage dependent, making it challenging to accurately predict their remaining lifespan due to varying current conditions during operation.

Method used

A method and device for monitoring the integrity of electrical contactors by determining the current value at switching events and assigning a percentage of the total contactor life expectancy to each event, allowing for updated remaining life estimates to be calculated and output.

Benefits of technology

Enables accurate prediction of the remaining lifetime of contactors by considering current variations, ensuring timely maintenance and reducing the risk of unexpected failures.

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Abstract

A method for monitoring contactor health of an electrical contactor of an electrical device, the electrical contactor being switchable in a switching event between an open state and a closed state or between a closed state and an open state, in response to a switching event command, the method includes determining a current value indicative of a current flowing in the closed electrical contactor at a time proximate the switching event, attributing a percentage of a total contactor life estimate to the switching event based on the current value, determining an updated percentage remaining contactor life estimate by subtracting the percentage of the total contactor life estimate from an initial percentage remaining contactor life estimate, and outputting the updated percentage remaining contactor life estimate.

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