High Current Vacuum Interrupter with Sectional Electrode
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Solution Overview
Problem
Traditional vacuum circuit interrupters face challenges in managing heat generated by high current flows, leading to larger, more expensive electrodes that require robust and energy-intensive operating mechanisms, necessitating a solution for smaller, more efficient electrodes that can handle higher currents.
Innovation Solution
The introduction of a conductive assembly with a heat transfer assembly, comprising elongated bodies with first and second heat transfer surfaces, allows for effective heat dissipation from the electrodes, enabling smaller electrode designs while maintaining high current handling capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If traditional electrodes are used to handle higher currents, then the current handling capability is improved, but the electrode size and volume increase
Solution Approach 1:
The electrode is divided into multiple segments or sections along its length, with each section having different cross-sectional areas. This segmentation allows the electrode to handle high current through strategic design of conductive paths while maintaining a smaller overall volume by reducing the cross-sectional area in non-critical regions.
Solution Approach 2:
Different sections of the electrode are designed with different local properties - specifically, varying cross-sectional areas. The electrode has larger cross-sectional areas at locations requiring higher current carrying capacity and smaller cross-sectional areas in regions where less current flows, optimizing the balance between current handling and volume.
2Power
If larger electrodes are used to handle higher currents, then the current handling capability is improved, but the cost increases
Solution Approach 1:
By segmenting the electrode into sections with different cross-sectional areas, the design avoids the need to manufacture and install uniformly large electrodes throughout, reducing material costs and manufacturing complexity while still achieving the required current handling capability in critical areas.
Solution Approach 2:
The varying cross-sectional area design applies material and manufacturing resources only where needed - larger sections are placed only in locations requiring high current capacity, reducing overall material consumption and manufacturing cost compared to uniformly large electrodes.
3Power
If larger electrodes are used to handle higher currents, then the current handling capability is improved, but the operating mechanism becomes more robust and expensive
Solution Approach 1:
The segmented electrode structure with varying cross-sectional areas reduces the overall size and weight of the electrode assembly, which in turn reduces the size and complexity requirements of the operating mechanism needed to move and position the electrode sections, simplifying the overall system.
Solution Approach 2:
By concentrating the larger cross-sectional areas only where high current handling is needed rather than throughout the entire electrode, the overall mass and dimensions of the electrode are reduced, allowing for a less robust and less expensive operating mechanism to be used.
4Power
If larger electrodes are used to handle higher currents, then the current handling capability is improved, but the energy consumption increases
Solution Approach 1:
The segmented design with varying cross-sectional areas reduces the total mass of the electrode compared to a uniformly large electrode, thereby reducing the energy required by the operating mechanism to move and position the electrode during operation.
Solution Approach 2:
By optimizing the cross-sectional area at each location based on actual current distribution, the electrode minimizes unnecessary material mass in regions where full current capacity is not required, reducing the energy needed for actuation while maintaining adequate current handling where needed.
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 configuration enables efficient heat transfer, reducing the size and energy requirements of the electrodes while maintaining performance, thus addressing the need for smaller, cost-effective solutions for higher current ratings.
Implementation Method 1
The heat transfer assembly includes a number of elongated bodies, a first heat transfer surface, and a second heat transfer surface. The first heat transfer surface is disposed on the conductive assembly. Each heat transfer assembly body includes a second heat transfer surface. Each heat transfer assembly body is coupled to the conductive assembly with the first heat transfer surface coupled to a number of second heat transfer surfaces.
Data Source
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AI summary
An electrode assembly (70) for a circuit breaker (10) is provided. The electrode assembly (70) includes a conductive assembly (90) and a heat transfer assembly (200). The conductive assembly (90) includes a stem portion (92) and a contact portion (94). The heat transfer assembly (200) includes a number of elongated bodies (202), a first heat transfer surface (204), and a second heat transfer surface (206). The first heat transfer surface (204) is disposed on the conductive assembly (90). Each heat transfer assembly body (202) includes a second heat transfer surface (206). Each heat transfer assembly body (202) is coupled to the conductive assembly (90) with the first heat transfer surface (204) coupled to a number of second heat transfer surfaces (206).