Electromagnetic Opening Closing Device Self-Check Malfunction Detection
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Solution Overview
Problem
Electromagnetic opening/closing devices face issues with impaired conduction between contacts due to surface oxidation or welding, requiring effective malfunction detection methods to notify external systems.
Innovation Solution
An electromagnetic opening/closing device equipped with a detector, determination unit, and output unit that self-checks the state of contacts and provides notifications for malfunctions, using a detection coil, auxiliary contacts, and a drive unit to determine and signal the presence of malfunctions based on contact states and external commands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electromagnetic opening/closing device operates without self-checking capability, then device structure remains simple, but malfunction detection requires external apparatus increasing system complexity
Solution Approach 1:
The electromagnetic opening/closing device performs self-diagnosis by detecting its own contact states through the detector and determination unit, eliminating the need for external monitoring apparatus. The device independently determines whether contacts are normally open or normally closed based on detector signals and generates appropriate malfunction notifications,实现ing self-service malfunction detection.
Solution Approach 2:
The detector continuously monitors contact states and feeds this information back to the determination unit, which compares actual states with expected states (normally open or normally closed). This feedback mechanism enables real-time malfunction detection and notification generation without external intervention.
2Reliability
If external apparatus is used to detect contact malfunction, then detection function is provided, but system complexity and cost increase
Solution Approach 1:
The malfunction detection function is merged into the electromagnetic opening/closing device itself by integrating the detector, determination unit, and notification generation capabilities. This consolidation eliminates the need for separate external monitoring apparatus, reducing system complexity while maintaining detection functionality.
Solution Approach 2:
The detector serves multiple functions: it monitors contact states, provides feedback to the determination unit, and enables both normally open and normally closed contact malfunction detection. This multi-functionality reduces the need for separate specialized components.
3Measurement precision
If detector monitors contact state continuously, then malfunction detection accuracy improves, but energy consumption increases
Solution Approach 1:
The detector periodically monitors contact states rather than continuously, triggering detection cycles based on operational phases or time intervals. This periodic monitoring maintains adequate detection accuracy while significantly reducing energy consumption compared to continuous monitoring.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables self-checking and notification of malfunctions, allowing for easy monitoring and reducing the need for external apparatuses to detect failures, thereby improving reliability and maintenance in electromagnetic opening/closing devices.
Implementation Method 1
an electromagnet configured to allow the moving contact (11) to come into contact with or separate from the stationary contact (10) by electromagnetic force
Implementation Method 2
The detector (5) comprises a detection coil (53) configured to have impedance varying in response to excitation of the electromagnet (20, 22). The detector is configured to detect opening or closing of the stationary contact (10) and the moving contact (11) based on a change in the impedance of the detection coil (53).
Data Source
AI summary
An electromagnetic opening/closing device A1 includes a detector 5 for detecting an opened or closed state of a contact unit 1; a malfunction determination unit 6 configured to determine presence or absence of malfunction based on the opened or closed state of the contact unit 1 detected through the detector 5 and an opened or closed state of the contact unit 1 corresponding to an exterior command; and an output unit 8 configured to supply an exterior with a determination result by the malfunction determination unit 6.