Circuit Interrupter Control Using Abnormal Current for Fast Cutoff
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Solution Overview
Problem
Existing control systems for interrupting electric circuits in vehicles take time to activate due to the need for crash determination processing, which can lead to delays in disconnecting power during accidents.
Innovation Solution
A control system that uses an abnormal current flowing through an intermediate electrical path to drive a switch system, directly activating an interrupter to disconnect the main electric circuit without the need for crash determination processing, thereby reducing activation time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electronic control unit is used to detect crash and activate the conduction cutoff device, then the system can reliably detect abnormal conditions, but it takes time for the control unit to determine whether there is a crash, causing delay in activation
Solution Approach 1:
The patent extracts the crash detection function from the electronic control unit and implements it directly through the circuit architecture. The abnormal current detection is performed by the circuit itself rather than through software processing in the ECU, eliminating the time delay associated with microcontroller-based detection while maintaining reliable crash detection capability.
Solution Approach 2:
The patent replaces the electronic control unit's software-based detection mechanism with a direct electrical circuit mechanism. By using the abnormal current flowing through the intermediate electrical path to directly drive the driven unit, the system substitutes the ECU's processing mechanism with an immediate electrical response mechanism, achieving both reliability and speed.
2Measurement precision
If an electronic control unit performs crash determination processing, then the system can accurately identify abnormal conditions, but the processing time increases, delaying the interrupter activation
Solution Approach 1:
The patent extracts the detection function from the ECU's software processing and implements it through the circuit's inherent electrical characteristics. The abnormal current directly flows through the intermediate electrical path and drives the driven unit without requiring software-based determination processing, maintaining detection accuracy while eliminating processing delays.
Solution Approach 2:
The circuit performs self-detection of abnormal conditions through the abnormal current flow. The intermediate electrical path automatically detects the presence of abnormal current and directly drives the driven unit without external control, enabling the system to self-identify and respond to abnormal conditions immediately without ECU intervention.
3Loss of time
If a direct current-driven mechanism is used without ECU processing, then the activation time is reduced, but the system complexity increases with additional electrical paths and components
Solution Approach 1:
The intermediate electrical path serves multiple functions: it is part of the main electric circuit for normal operation and simultaneously serves as the drive source for the driven unit during abnormal conditions. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in system complexity while achieving rapid activation.
Solution Approach 2:
The abnormal current flowing through the intermediate electrical path acts as an intermediary that directly drives the driven unit. This intermediary mechanism eliminates the need for complex control logic and additional active components, achieving rapid activation with minimal added complexity by utilizing the existing circuit infrastructure.
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
This solution allows for faster interruption of the electric circuit during abnormal conditions, such as accidents, by eliminating the need for processing delays, ensuring quicker disconnection of power and enhancing system reliability.
Implementation Method 1
When an abnormal current having a current value equal to or greater than a prescribed value flows through the intermediate electrical path, the driving unit uses, as a drive source for driving the driven unit, the abnormal current flowing through the intermediate electrical path
Data Source
AI summary
A control system is designed to control an interrupter. The interrupter is started by a startup current to interrupt a main electric circuit. The startup current flows through an auxiliary electric circuit and has a current valve equal to or greater than a predetermined value. The control system includes a driving unit and a driven unit. The driving unit includes an intermediate electrical path to be connected to the main electric circuit. The driven unit is to be connected to the auxiliary electric circuit. When an abnormal current having a current value equal to or greater than a prescribed value flows through the intermediate electrical path, the driving unit uses, as a drive source for driving the driven unit, the abnormal current flowing through the intermediate electrical path. The driven unit supplies the auxiliary electric circuit with the startup current by being driven by the driving unit.