Capacitor-Centered Power Converter Layout for Thermal Balance
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Solution Overview
Problem
Conventional semiconductor modules face challenges in efficiently integrating power switching elements like MOSFETs and IGBTs within electronic devices, particularly in ensuring optimal thermal management and electrical connectivity while maintaining compactness and reliability.
Innovation Solution
A power conversion device comprising a capacitor module with specific busbar configurations and semiconductor modules arranged in a biased manner, utilizing silicon carbide semiconductor elements and a conductive substrate with Ag plating for enhanced thermal and electrical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If semiconductor modules with power switching elements are integrated in conventional configurations, then electrical connectivity is achieved, but thermal management efficiency deteriorates
Solution Approach 1:
The patent transitions from planar 2D arrangement of power switching elements to a 3D stacked configuration where semiconductor modules are vertically stacked with capacitor modules interspersed between them. This vertical stacking enables improved thermal management by providing direct thermal pathways from power switching elements to heat dissipation structures, while maintaining compact footprint and reducing integration complexity through spatial optimization.
2Volume of moving object
If compact arrangement of semiconductor modules is implemented, then device size is reduced, but electrical connectivity and thermal management deteriorate
Solution Approach 1:
The patent segments the power conversion device into modular units comprising semiconductor modules and capacitor modules stacked alternately. Each semiconductor module is electrically connected to adjacent capacitor modules through busbars, creating distributed electrical connectivity pathways. This segmentation maintains reliable electrical connections while achieving compact overall device volume through efficient vertical stacking and reduced inter-module spacing.
3Loss of energy
If conventional semiconductor module integration is used, then manufacturing is simplified, but thermal dissipation efficiency deteriorates
Solution Approach 1:
The patent merges the functional roles of power switching elements and energy storage elements into a unified stacked architecture where semiconductor modules and capacitor modules are integrally positioned. This merging enables direct thermal coupling between power switching elements and capacitor modules that serve as heat sinks, improving thermal dissipation efficiency while maintaining manufacturing simplicity through standardized module interfaces and assembly procedures.
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 provides improved thermal dissipation and electrical connectivity, enhancing the reliability and efficiency of power conversion devices by optimizing the arrangement and materials used in semiconductor modules.
Implementation Method 1
a conductive substrate with Ag plating for enhanced thermal and electrical performance
Implementation Method 2
a conductive substrate with Ag plating for enhanced thermal and electrical performance
Data Source
AI summary
The power conversion device includes a first semiconductor module, a second semiconductor module, a third semiconductor module, and a capacitor module. As viewed in a z direction, the first center line of the first semiconductor module, the second center line of the second semiconductor module, and the third center line of the third semiconductor module intersect the capacitor body. The first angle formed by the first center line and the second center line and the second angle formed by the second center line and the third center line are equal to each other. The lengths of the first busbar, the second busbar and the third busbar are equal to each other.