Interconnect Connection Circuit with Preliminary Wiring Check
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Solution Overview
Problem
Existing connection circuits in interconnect devices fail to effectively detect erroneous wiring, leading to repeated melting of safety fuses due to short circuits, and are cumbersome to check with separate conduction testers, while poly-switches are inadequate for protecting circuits with normal currents.
Innovation Solution
A connection circuit with a power control unit that performs a preliminary wiring check by detecting short circuits between power and ground lines using a short-circuit checker or amperemeter, preventing power supply until the lines are confirmed not short-circuited, thus avoiding overcurrent and fuse melting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a safety fuse is used to protect against overcurrent, then the circuit is protected from damage, but the fuse may be repeatedly melted due to unknown short circuits, requiring frequent replacement
Solution Approach 1:
The patent applies preliminary action by performing a wiring check operation before main power supply. The control unit detects potential short circuits in advance by applying a test voltage and measuring current, preventing fuse melting before it occurs. This preliminary detection eliminates the need for repeated fuse replacements while maintaining circuit protection.
2Reliability
If a conduction tester is used to check wiring before power-on, then short circuits can be detected, but the checking process becomes cumbersome and time-consuming
Solution Approach 1:
The patent merges the wiring check function with the main power supply circuit by using the control unit to perform both functions. The control unit automatically executes a wiring check operation before main power supply, combining what were previously separate tasks (manual conduction testing and power supply) into one integrated automated process, thereby eliminating time loss.
Solution Approach 2:
The system performs self-service by automatically checking wiring conditions without requiring external conduction testers or manual intervention. The control unit autonomously applies test voltage, measures current, determines short circuit conditions, and controls power supply accordingly, making the system self-diagnosing and self-protecting.
3Ease of operation
If a poly-switch is used instead of a safety fuse, then repeated replacements are avoided, but the cut-off time is too long for circuits with normal currents of several amperes
Solution Approach 1:
The patent applies preliminary action by performing wiring checks before main power supply, detecting potential short circuits in advance. This prevents overcurrent conditions from developing, eliminating the need for slow poly-switch response and maintaining fast protection capability through preventive detection rather than reactive response.
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
Prevents safety fuse melting and enables quick overcurrent protection by ensuring accurate wiring before power is supplied, reducing the need for repeated fuse replacements and simplifying the checking process.
Implementation Method 1
it is determined whether or not the power line and the ground line are short-circuited based on a current value detected by an amperemeter
Implementation Method 2
the safety fuse is melted when an overcurrent occurs
Implementation Method 3
the safety fuse is melted when an overcurrent occurs
Data Source
AI summary
Disclosed is a connection circuit capable of detecting erroneous wiring of an interconnect device in order to prevent a safety fuse from being melted and quickly perform an overcurrent protection in the event of erroneous wiring or the like. In this connection circuit of the interconnect device, a preliminary wiring check operation is performed when a power control unit receives a power-on signal. It is detected whether or not a power line and a ground line are short-circuited in the preliminary wiring check operation. When the power line and the ground line are not short-circuited, an operation instruction is output from the power control unit to a power unit. As a result, power is turned on after it is checked whether or not the power line and the ground line are short-circuited in advance. Therefore, it is possible to prevent the safety fuse from being melted.