Wave-Shaped Fuse Element for High-Voltage Compact Casing
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Solution Overview
Problem
Existing fuses designed for high voltage and high current applications tend to increase in width, length, and height, necessitating larger casings, which is undesirable.
Innovation Solution
A fuse design featuring a wave-shaped fuse element with crest and valley parts, including a cutout on the tip of the crest part, allows for high voltage and high current handling without enlarging the casing by preventing interference during insertion and positioning the fusing part away from the casing inner surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the fuse element is complicated in configuration to address high voltage and high current, then the voltage and current handling capability is improved, but the width, length, and height of the fuse element increase
Solution Approach 1:
The fuse element is configured in a wave shape with multiple crests and valleys, utilizing three-dimensional spatial arrangement to increase the effective length and voltage handling capability within a compact footprint. This dimensional transformation allows the fuse element to accommodate high voltage requirements without proportionally increasing overall dimensions.
2Power
If the fuse element is complicated in configuration to address high voltage and high current, then the voltage and current handling capability is improved, but the dimensions of the casing increase
Solution Approach 1:
The wave-shaped fuse element efficiently utilizes three-dimensional space within the casing, allowing increased voltage handling capability without proportionally increasing casing volume. The compact spatial arrangement of crests and valleys maximizes the use of available internal space.
Solution Approach 2:
The multiple crests and valleys of the wave-shaped fuse element are nested within the limited space of the casing, with each crest and valley efficiently positioned to maximize space utilization. This nested arrangement allows complex fuse element configuration without requiring proportional increase in casing dimensions.
3Strength
If the crest part of the fuse element is provided without cutout, then the structural integrity is improved, but the end part interferes with the opening and inner surface of the casing during insertion
Solution Approach 1:
A cutout is extracted from the end part of each crest, removing the interfering portion that would otherwise contact the casing opening or inner surface during insertion. This selective removal of material eliminates the interference problem while preserving the structural integrity of the remaining crest structure.
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 design enables efficient arc extinction and maintains casing dimensions, allowing easy insertion and housing of the fuse element while addressing high voltage and high current requirements.
Implementation Method 1
when an unintended overcurrent flows in the electric circuit, a fusing part of a fuse element incorporated in the fuse fuses due to heat generated by the overcurrent
Implementation Method 2
an arc generated in the fusing part is efficiently extinguished by an arc-extinguishing material or the like, which is provided in the casing
Data Source
AI summary
The invention of the present application provides a fuse addressing high voltage and high current while maintaining dimensions of a casing of the fuse. The fuse is a fuse including a casing, terminal parts on respective sides, and a fuse element housed in the casing, in which the fuse element is in a wave shape including a valley part and a crest part while including a fusing part, and the crest part includes a tip part provided with a cutout formed by cutting out an end part of the tip part.