Switching Apparatus Self-Powered Branch for Circuit Interruption
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Solution Overview
Problem
Existing switching apparatuses for circuit interruption devices require a standalone power source for switching elements, which increases hardware cost, size, and weight, and may not be compatible with varying voltage levels during normal or fault operations.
Innovation Solution
A switching apparatus with a first current-conductive branch including a switching element and an energy storage element, where the energy storage element is coupled to a second switching element, allowing energy from the first branch to power the second element, eliminating the need for a standalone power source and enabling operation across incompatible voltage levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standalone power source is used for the second switching element, then the switching element can be reliably powered, but the hardware cost, size, and weight increase
Solution Approach 1:
The patent merges the power source function into the existing first current-conductive branch by using the first switching element and energy storage element to generate and store power for the second switching element. This eliminates the need for a separate standalone power source, thereby reducing hardware weight while maintaining reliable power supply to the second switching element.
2Reliability
If a standalone power source is used for the second switching element, then the switching element can be reliably powered, but the hardware cost and size increase
Solution Approach 1:
The patent combines multiple functions into the first current-conductive branch: the first switching element serves both as a current switch and as part of the power generation circuit, while the energy storage element serves both as an energy reservoir and as a power regulation component. This functional merging reduces the number of separate components needed, thereby reducing hardware complexity and cost while ensuring reliable power supply.
Solution Approach 2:
The first switching element and energy storage element perform multiple functions: they switch current in the first branch, generate power for the second switching element, store energy for reliable power supply, and regulate voltage levels. This multi-functionality eliminates the need for dedicated standalone power source components, reducing overall device complexity.
3Power
If voltage levels at the terminals are incompatible with the second switching element requirements, then the switching apparatus can operate at high voltage, but the second switching element cannot be powered
Solution Approach 1:
The energy storage element acts as an intermediary between the high voltage first current-conductive branch and the second switching element. It receives energy from the high voltage current, stores it, and releases it at compatible voltage levels to power the second switching element, thereby bridging the voltage incompatibility while maintaining reliable operation at high voltage levels.
Solution Approach 2:
The energy storage element transforms the electrical parameters (voltage and current) from the first branch into suitable parameters for the second switching element. By controlling the charging and discharging of the energy storage element, the system changes the voltage and current parameters to achieve compatibility between the high voltage operation and the switching element requirements.
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 reduces hardware costs, size, and weight while providing a reliable power supply for switching elements, enabling efficient operation during both normal and fault conditions, even at high voltage levels, and allows for sequential switching operations.
Implementation Method 1
an energy storage element electrically coupled to the second switching element so that the energy storage element is configured as a power source for enabling the operation of the second switching element
Data Source
AI summary
A switching apparatus comprises: a first current-conductive branch (12) including a first switching element (24), the first switching element (24) configured to be switchable to selectively permit and block a flow of current in the first current-conductive branch (12); a second current-conductive branch (14) including a second switching element (32), the second switching element (32) configured to be switchable to selectively permit and block a flow of current in the second current-conductive branch (14); and first and second terminals (18,20) for connection, in use, to an electrical network (22), wherein the first and second current-conductive branches (12,14) extend between the first and second terminals (18,20), wherein the first current-conductive branch (12) further includes an energy storage element electrically coupled to the second switching element (32) so that the energy storage element is configured as a power source for enabling the operation of the second switching element (32), and the first switching element (24) is configured to be switchable to selectively direct a current flowing in the first current-conductive branch (12) to flow through the energy storage element so as to store energy in the energy storage element.