Surge Absorber Bulging Electrode Long Wave Tail Protection
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Solution Overview
Problem
Conventional surge absorbers, such as micro-gap and carbon trigger line types, face issues with damage from long wave tail surges and increased manufacturing costs due to the need for discharging aids to stabilize sparkover voltage.
Innovation Solution
A surge absorber design featuring bulging electrode elements with an expanded center portion made of metal, formed within terminal electrode members and bonded using an Ag-containing brazing material, which concentrates electric fields for efficient discharge and stabilizes sparkover voltage without additional discharging aids, and includes a trigger portion for improved impulse voltage responsibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a micro-gap type surge absorber is used, then the surge absorber can protect electronic equipment from abnormal overvoltage, but the internal elements are severely damaged when a current surge having a long wave tail enters
Solution Approach 1:
The patent changes the physical parameters of the electrode by creating a bulging shape with expanded center portion instead of a flat surface. This geometric parameter change concentrates the electric field at the bulging portion, enabling the surge absorber to handle long wave tail surges without damaging internal elements, while maintaining effective surge protection capability.
2Reliability
If a carbon trigger line-type surge absorber is used, then the surge absorber can stabilize sparkover voltage, but a projecting electrode and discharging aid are required, resulting in increased manufacturing cost
Solution Approach 1:
The patent extracts and eliminates the need for separate discharging aid materials and complex projecting electrode structures. By incorporating the electron emission function directly into the bulging electrode element through geometric design, the invention achieves stable sparkover voltage without additional components, thereby reducing manufacturing cost and simplifying the structure.
Solution Approach 2:
The bulging electrode element serves multiple functions simultaneously: it acts as both the main electrode and the electron emission source through its geometric shape. The expanded center portion naturally concentrates the electric field and emits electrons without requiring additional discharging aids, enabling the electrode to serve itself and reduce overall system complexity and cost.
3Reliability
If bulging electrode elements with expanded center portion are formed, then the electric field concentrates for efficient discharge and long wave tail surge absorption, but the electrode structure becomes more complex
Solution Approach 1:
The patent merges the electron emission function and the surge absorption function into a single integrated electrode structure. The bulging electrode element with expanded center portion combines the geometric features needed for field concentration with the functional requirements for both electron emission and surge handling, eliminating the need for separate components and reducing overall device complexity despite the localized geometric 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 surge absorber effectively absorbs long wave tail surges with stable sparkover voltage and reduced manufacturing costs, demonstrating high reliability and surge tolerance with a simple configuration and improved impulse ratio.
Implementation Method 1
since the electric field concentrates on the expanded center portion of the bulging electrode elements and thus can readily be discharged therethrough
Implementation Method 2
the bulging electrode element contains metal which can emit more electrons than the terminal electrode members
Data Source
AI summary
[Problems]Disclosed is a surge absorber which can absorb a surge having a long wave tail, wherein a stable sparkover voltage is obtained without applying a discharging aid to electrodes.[Means for Solving the Problems]The surge absorber is comprised of a pair of terminal electrode members (2) which are opposed to each other; and the insulation tube (3) on which the pair of terminal electrode members (2) are disposed on opposite ends thereof and that has a discharge control gas sealed therein. Bulging electrode elements (4) having an expanded center portion (4a) are formed on the inner surfaces of the terminal electrode members (2). The bulging electrode elements (4) contain metal which can emit more electrons than the terminal electrode members (2).