Power Supply Conductor Layout for Snubber Capacitor Temperature Control
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Solution Overview
Problem
In electric devices, particularly those with capacitors, excessive heat transfer to snubber capacitors leads to temperature rises, which can be detrimental to their performance and longevity.
Innovation Solution
The design incorporates a first power supply portion with a higher thermal resistance per unit length in its extension direction compared to a second power supply portion, which reduces heat transfer to the capacitor, thereby suppressing temperature rises.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the second power supply portion has low thermal resistance per unit length to efficiently conduct power, then power transmission efficiency is improved, but heat transfer to the capacitor increases causing excessive temperature rise
Solution Approach 1:
The patent applies local quality by creating different thermal resistance characteristics in different regions of the power supply portions. The first power supply portion (connected to the capacitor) has high thermal resistance per unit length to prevent heat transfer to the capacitor, while the second power supply portion has low thermal resistance per unit length for efficient power transmission. This spatial differentiation of thermal properties resolves the contradiction between power transmission efficiency and temperature control.
2Temperature
If the power supply portion is designed for efficient heat dissipation, then thermal management is improved, but heat transfer to the capacitor increases reducing its lifespan
Solution Approach 1:
The patent segments the power supply system into two distinct portions with different thermal characteristics. The first power supply portion is segmented to have high thermal resistance specifically at the section connected to the capacitor, while the second power supply portion maintains low thermal resistance for overall heat dissipation. This segmentation allows simultaneous achievement of thermal management and capacitor protection.
3Temperature
If thermal resistance per unit length is increased in the first power supply portion to protect the capacitor, then capacitor temperature control is improved, but power transmission efficiency decreases
Solution Approach 1:
The patent implements local quality by applying high thermal resistance characteristics only to the first power supply portion that is in thermal proximity to the capacitor, while maintaining low thermal resistance in the second power supply portion. This localized thermal resistance differentiation ensures that power transmission efficiency is maintained in the second portion while the first portion provides thermal protection to the capacitor.
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 effectively minimizes heat transfer to the capacitor, preventing excessive temperature rises and ensuring the capacitor's optimal functioning and extended lifespan.
Implementation Method 1
A thermal resistance per unit length in a second extension direction of the second power supply portion is higher than a thermal resistance per unit length in a first extension direction of the first power supply portion
Data Source
AI summary
An electric device includes a first power supply portion having a first conductive section configured to electrically connect a power source and an electrical component and a second conductive section configured to be integrally connected to the first conductive section and extend away from the first conductive section, a second power supply portion connecting to the second conductive section, and a capacitor. A thermal resistance per unit length in a second extension direction of the second power supply portion is higher than a thermal resistance per unit length in a first extension direction of the first power supply portion.