Semiconductor DC Disconnect Module With Relay-Level Diagnostics
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Solution Overview
Problem
Existing relay technologies for safely disconnecting DC loads in laser systems face limitations such as a limited lifespan due to wear and a large installation space requirement, and there is a need for an alternative monitoring method for semiconductor-based switching elements to achieve diagnostic coverage comparable to mechanically contacting relays.
Innovation Solution
A shutdown module utilizing semiconductor-based switching elements with integrated diagnostic units, comprising a control unit, shutdown circuits, and a charging circuit, which ensures safe disconnection of DC loads by monitoring voltage differences and providing feedback signals, thereby eliminating the need for mechanically contacting relays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanically contacting relays are used for switching, then diagnostic coverage of 90%-99% can be achieved through positive guidance of contacts, but the lifespan is limited due to wear (approximately 50,000 switching cycles) and installation space requirement is large
Solution Approach 1:
The patent replaces mechanically contacting relays with semiconductor-based switching elements (such as MOSFETs or IGBTs) that have no moving parts, eliminating wear and extending lifespan indefinitely while maintaining switching functionality through electronic control
2Reliability
If mechanically contacting relays are used for switching, then diagnostic coverage of 90%-99% can be achieved through positive guidance of contacts, but installation space requirement is large
Solution Approach 1:
The patent replaces bulky mechanically contacting relays with compact semiconductor-based switching elements integrated into a circuit board, dramatically reducing installation space while maintaining all necessary switching and diagnostic functions through electronic implementation
3Duration of action of moving object
If semiconductor-based switching elements are used to replace relays, then lifespan is extended and installation space is reduced, but diagnostic option at load contacts is lacking
Solution Approach 1:
The patent implements a diagnostic circuit that continuously monitors the switching state of semiconductor elements by detecting voltage differences across them, providing real-time feedback signals that indicate whether the load is properly disconnected, thereby achieving diagnostic coverage comparable to mechanical relays
Solution Approach 2:
The patent introduces an intermediary diagnostic circuit that mediates between the semiconductor switching elements and the control system, using voltage detection and signal processing to translate the switching state into interpretable diagnostic information without requiring direct contact with the load
Data Source
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AI summary
The invention relates to a disconnection module which is provided for safely disconnecting a DC voltage load and which comprises a disconnection unit (1) having semiconductor-based switching elements, an actuation unit (2), a voltage supply unit (4) and a diagnosis unit (3) for monitoring the switching state of the semiconductor-based switching elements. The disconnection module is suitable in particular for safely disconnecting the voltage supply of laser beam sources.