Wedge-Shaped Electrical Switch Busbar Contact Area
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Solution Overview
Problem
Conventional non-destructive testing systems experience overheating and reduced effectiveness due to the small surface area of flat bar contacts used in electrical switching devices, which limits their operational effectiveness in high amperage applications.
Innovation Solution
An electrical switch assembly with a wedge-shaped assembly that repositions to form an electrical circuit between busbars, providing a larger contact area and improved cooling through a fan assembly, reducing overheating and enhancing operational efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If flat bar contacts are used in conventional switching devices, then the device structure is simple, but the contact surface area is small causing overheating and burning
Solution Approach 1:
The patent transitions from flat bar contacts (2D surface contact) to wedge-shaped contacts with angled surfaces (3D geometric contact). The wedge shape creates a larger effective contact area by utilizing the angled geometry to distribute current over a broader surface, thereby reducing current density and preventing overheating while maintaining structural simplicity.
2Reliability
If flat bar contacts with small surface area are used, then the device complexity is low, but the operational effectiveness is reduced due to overheating
Solution Approach 1:
The patent changes the geometric parameters of the contact surfaces by introducing wedge-shaped contacts with specific angles. This parameter change increases the contact surface area and modifies the pressure distribution, thereby improving operational effectiveness and preventing overheating without significantly increasing device complexity.
3Power
If conventional flat bar contacts are used, then the switching device is easy to manufacture, but the current rating is limited due to small contact area
Solution Approach 1:
The wedge-shaped contact geometry utilizes three-dimensional spatial arrangement to increase contact surface area. This dimensional approach allows the contacts to handle higher current ratings by distributing current density over a larger area, while the wedge shape itself can be manufactured using standard machining processes, maintaining ease of manufacture.
4Duration of action of stationary object
If flat bar contacts are used, then the initial device cost is low, but the operational life is reduced due to overheating and burning
Solution Approach 1:
By changing the geometric parameters to wedge-shaped contacts, the patent increases the contact surface area and reduces current density. This parameter modification lowers operating temperatures and prevents thermal degradation, thereby extending the operational life of the switching device without requiring expensive materials or complex cooling systems.
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 wedge-shaped assembly increases the current rating, reduces circuit resistance, and extends the life of the electrical connections by maintaining a consistent and clean contact surface, while also allowing for efficient testing with reduced overall testing time.
Implementation Method 1
The wedge-shaped assembly increases the current rating, reduces circuit resistance
Implementation Method 2
providing a larger contact area and improved cooling through a fan assembly, reducing overheating
Data Source
AI summary
An electrical switch assembly includes a first pair of busbars, each busbar having a first portion and a second portion, the first portion disposed at an angle with respect to the second portion, and a wedge-shaped assembly configured to be repositionable to form an electrical circuit between the first pair of busbars. Also described herein is a non-destructive testing system including the electrical switch assembly.