Power Supply Relay Control for Deterioration vs Temporary Anomalies
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Solution Overview
Problem
Existing power supply circuit controllers fail to accurately determine relay deterioration, leading to potential misidentification of temporary anomalies as permanent failures, due to the inability to differentiate between relay deterioration and temporary foreign object attachment.
Innovation Solution
A controller for a power supply circuit that monitors voltage changes and measures elapsed time during relay energization and de-energization processes, determining relay deterioration based on specified reference values and successive occurrences or increasing trends, thereby distinguishing between deterioration and temporary anomalies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage change monitoring is used to detect relay anomalies, then inoperability due to welded contacts can be determined, but deterioration of the relay cannot be distinguished from temporary anomalies
Solution Approach 1:
The system performs preliminary actions by energizing the first relay, second relay, and third relay in a specific sequence before de-energizing the second relay. This creates a controlled test condition where the third relay's activation delay can be measured without interference from other relay operations, allowing accurate baseline measurement of relay performance
Solution Approach 2:
The system continuously monitors voltage at the load and provides feedback on activation delay. By comparing the measured activation delay against reference values and tracking successive occurrences, the system can distinguish between temporary anomalies and actual deterioration, improving both anomaly detection reliability and deterioration detection precision
2Measurement precision
If activation delay measurement is used to detect relay deterioration, then deterioration can be identified, but temporary anomalies may be misidentified as permanent failures
Solution Approach 1:
The system performs periodic measurement of activation delay through repeated sequence processes. By measuring the activation delay multiple times and analyzing successive occurrences, the system can distinguish between temporary anomalies (which occur sporadically) and actual deterioration (which persists across multiple measurements), thereby improving determination reliability
Solution Approach 2:
The system uses excessive measurement by taking multiple measurements of activation delay and comparing against reference values. This excessive action ensures that temporary anomalies do not lead to false deterioration determinations, as the system requires consistent evidence across multiple measurements before confirming deterioration
Data Source
AI summary
A controller for a power supply circuit, a control method for a power supply circuit, and a memory medium are provided. In a case in which a monitored value starts decreasing from when a second relay is de-energized, the controller measures elapsed time from when the monitored value starts decreasing to when the monitored value starts increasing. It is determined that a third relay has deteriorated when a determination condition, which includes a condition that the elapsed time is greater than or equal to a specified reference value, is met.