Redundant Contactor System with Data-Based Maintenance Indicators
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing climate control systems rely on time-based replacement schedules for contactors, which can lead to premature or unnecessary replacements, resulting in increased labor and material costs.
Innovation Solution
A redundant contactor system with a microcontroller and three independent relays, which uses voltage and current feedback to detect stuck relay contacts and provide adaptive data-based preventive maintenance alerts, eliminating the need for time-based replacement schedules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If time-based replacement schedules are used for contactors, then system reliability is maintained through preventive replacement, but unnecessary replacements occur resulting in increased labor and material costs
Solution Approach 1:
The patent implements feedback by using microcontrollers to continuously monitor voltage and current signals from relay contacts, detecting actual contactor health status and providing real-time feedback on whether replacement is truly necessary, thereby eliminating unnecessary replacements while maintaining reliability
Solution Approach 2:
The patent replaces the mechanical/time-based replacement schedule system with an electronic monitoring and detection system that uses microcontrollers, ADCs, and signal processing to determine replacement needs based on actual contactor performance rather than predetermined time intervals
2Measurement precision
If redundant relays and monitoring systems are added, then detection precision for stuck contacts is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the monitoring function into three independent relay channels, each with its own monitoring circuit, allowing individual detection of each contactor's status while maintaining modular simplicity in the overall system design
Solution Approach 2:
The patent implements universality by designing a multi-functional monitoring system where the same microcontroller and ADC circuitry serve multiple relay contacts simultaneously, reducing overall device complexity compared to having separate dedicated monitoring circuits for each contact
Data Source
AI summary
Exemplary embodiments are disclosed of contactors with data-based preventive maintenance replacement indicators and related methods for indicating that relay contact(s) should be replaced.