Induced-Current Cutoff Circuit for Self-Powered Breaker Tripping
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Solution Overview
Problem
Conventional cutoff devices require separate structural elements for detecting overcurrents and driving the cutoff mechanism, which can fail if disconnected due to accidents, leading to operational failures.
Innovation Solution
A cutoff device configuration that includes an electrical path with a coil generating an induced current, which drives a breaker through wiring, eliminating the need for a separate power source and enabling detection of overcurrents using the same induced current, thereby simplifying the device's configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate structural elements are used for detecting overcurrent and driving the cutoff mechanism, then the detection function can be performed, but the device complexity increases and reliability decreases due to potential disconnection
Solution Approach 1:
The patent combines the detection coil and driving coil into a single integrated coil structure. The same coil generates induced current that serves both detection and driving functions, eliminating the need for separate structural elements and reducing potential disconnection points while maintaining operational reliability
Solution Approach 2:
The single coil structure performs multiple functions: it detects overcurrent conditions and simultaneously generates the induced current to drive the cutoff mechanism. This multi-functional design reduces the number of components needed while improving system reliability
2Device complexity
If separate power supply is used for driving the cutoff mechanism, then the driving function can be ensured, but the device complexity increases
Solution Approach 1:
The system uses the induced current generated by the coil itself to drive the cutoff mechanism, rather than requiring an external power supply. The same electromagnetic induction that enables detection also provides the driving energy, making the system self-sufficient and simplifying the overall configuration
Solution Approach 2:
The patent merges the power supply function with the detection function by using the induced current from the same coil for both purposes. This eliminates the need for a separate power supply system and reduces configuration complexity
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
The solution allows for a more reliable and simplified cutoff device operation by using the induced current to drive the breaker and detect overcurrents, reducing the risk of failure due to disconnection and enhancing operational efficiency.
Implementation Method 1
a first coil in which a first induced current corresponding to an electric current flowing through the electrical path is generated
Data Source
AI summary
This cutoff device includes: an electrical path; a first coil in which a first induced current corresponding to an electric current flowing through the electrical path is generated; a breaker that interrupts the electrical path; and wiring that electrically connects the first coil and the breaker. The breaker is driven with the first induced current generated in the first coil.