Capacitor Bus Bar Thermal Shielding for Power Conversion Downsizing
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Solution Overview
Problem
Conventional power conversion apparatuses face challenges in designing capacitor modules to prevent heat damage from heat-generating components while also requiring downsizing, which complicates the arrangement of capacitor modules relative to heat-generating components.
Innovation Solution
The power conversion apparatus incorporates a first and second capacitor module arranged to face each other with a heat-generating component in between, where the second bus bar has an intervening part that separates from both the second capacitor element and the heat-generating component, effectively blocking heat transfer and facilitating downsizing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If capacitor modules are arranged close to heat-generating components to reduce overall size, then the power conversion apparatus achieves downsizing, but the capacitor elements are exposed to heat damage
Solution Approach 1:
The bus bar structure is designed with an intervening portion that acts as a thermal barrier between the heat-generating component and the capacitor element. This intermediary structure blocks heat transfer while maintaining electrical connectivity, allowing close arrangement of components without exposing the capacitor element to harmful heat
Solution Approach 2:
The bus bar is segmented into different functional portions: a connection portion that connects to the capacitor element and an intervening portion that serves as heat shielding. This segmentation allows the same component to fulfill both electrical connection and thermal protection functions
2Object-affected harmful factors
If heat shielding structures are added between capacitor elements and heat-generating components, then heat damage is prevented, but the device complexity and parts count increase
Solution Approach 1:
The bus bar is designed to perform multiple functions simultaneously: it provides electrical connection between components and acts as a heat shielding barrier. This multi-functionality eliminates the need for separate heat shielding components, maintaining simplicity while preventing heat damage
Solution Approach 2:
The heat shielding function is merged into the existing bus bar structure rather than being implemented as a separate component. The intervening portion of the bus bar combines electrical conduction and thermal blocking functions in a single integrated element
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 suppresses temperature rise in the second capacitor element without increasing parts count, enabling the downsizing of the power conversion apparatus while preventing heat damage.
Implementation Method 1
the second bus bar has an intervening part that intervenes between the second capacitor element and the heat-generating component, in a state of being separated from the two
Data Source
AI summary
A power conversion apparatus has: a heat-generating component; and a first capacitor module and a second capacitor module that are arranged to face each other with the heat-generating component therebetween. The first capacitor module has a first capacitor element, a first case that accommodates the first capacitor element, and a first bus bar with one end connected to the first capacitor element. The second capacitor module has a second capacitor element, a second case that accommodates the second capacitor element, and a second bus bar with one end connected to the second capacitor element. The second bus bar has an intervening part that intervenes between the second capacitor element and the heat-generating component, in a state of being separated from the two.