Heat Dissipation Support Unit for Switchgear Thermal Management
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Solution Overview
Problem
Conventional heat dissipation techniques for circuit breakers are limited, particularly in switchgear with space constraints due to dielectric clearances, leading to premature wear and failure from excessive thermal stresses.
Innovation Solution
A heat dissipation support unit is introduced, physically positioned between the high heat-high voltage region and the low heat-earth potential region, utilizing a core with conducting and ceramic sections to form a heat convection bridge while providing mechanical support, ensuring effective heat transfer and dielectric stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional heat dissipation techniques (heat sinks, chemical deposits, increased cross-section) are used, then heat dissipation is improved, but device complexity and space requirements increase due to dielectric clearance constraints
Solution Approach 1:
The support unit is designed to perform multiple functions simultaneously: it provides mechanical support for the moveable contact while also serving as a heat dissipation pathway. By integrating these two functions into a single component, the patent eliminates the need for separate heat sinks or thermal management devices, thereby reducing device complexity while maintaining effective heat dissipation.
Solution Approach 2:
The patent combines the structural support function and thermal management function into a single integrated support unit. The support unit mechanically supports the moveable contact and simultaneously conducts heat away from it, merging two previously separate functions into one component to reduce overall system complexity.
2Temperature
If heat sinks and thermal management components are added, then heat dissipation is improved, but the available space is reduced due to dielectric clearance requirements
Solution Approach 1:
The support unit performs dual functions as both a mechanical support structure and a thermal conduction pathway. By making the support unit multi-functional, the patent eliminates the need for additional dedicated heat dissipation components that would consume valuable space within the circuit breaker assembly.
Solution Approach 2:
The support unit utilizes its own structural presence to provide heat dissipation functionality. Rather than requiring separate heat sinks or thermal management components, the support unit itself serves as the heat dissipation pathway, effectively using its own mass and thermal conductivity properties to manage thermal loads without requiring additional space-consuming components.
3Temperature
If the support unit is made entirely of conducting material, then heat transfer is improved, but dielectric stability is compromised in high voltage regions
Solution Approach 1:
The support unit is constructed from composite materials that combine high thermal conductivity with adequate dielectric properties. This allows the support unit to effectively conduct heat away from the moveable contact while simultaneously maintaining the necessary dielectric stability to withstand high voltage conditions in the circuit breaker environment.
Solution Approach 2:
The patent modifies the material parameters of the support unit by selecting materials with specific thermal and electrical property combinations. The support unit uses materials optimized to balance thermal conductivity for heat dissipation with electrical resistivity or dielectric strength for voltage withstanding, achieving a parameter optimization that satisfies both thermal management and electrical insulation 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
The solution effectively dissipates heat generated during operation, reducing thermal stresses and improving the reliability of circuit breakers by maintaining dielectric stability and mechanical support, suitable for various types of insulants and switchgear configurations.
Implementation Method 1
a heat dissipation support unit physically disposable between a high heat - high voltage region proximal to the moveable contact and a low heat - earth potential region of the switching device thereby, forming a heat convection bridge therebetween
Implementation Method 2
utilizing a core with conducting and ceramic sections to form a heat convection bridge while providing mechanical support, ensuring effective heat transfer and dielectric stability
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A switching device (100) including at least a switching compartment (100A), a busbar compartment (100B), a cable compartment (100C), and a drive unit (100D) operably connected to one another is provided. The switching compartment (100A) has a stationary contact (102) and a moveable contact (103) moveable for opening and closing an electrical circuit formed therebtween. The switching compartment (100A) also includes a heat dissipation support unit (106) physically disposable between a high heat - high voltage region (104, 103) proximal to the moveable contact (103) and a low heat - earth potential region (101, 100E) thereby, forming a heat convection bridge therebetween during operation of the switching device (100).