Capacitor Mounting Structure for Insulated Heat Dissipation
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Solution Overview
Problem
Existing control devices face challenges in efficiently dissipating heat from capacitors due to insulation materials impeding heat transfer and require large-scale operations for capacitor fixation, leading to inefficiencies in production.
Innovation Solution
A control device design featuring a capacitor mounting wall with high thermal conductivity, insulation members, and a thermally conductive adhesive to ensure electrical insulation and stable fixation, allowing for efficient heat dissipation and simplified fixing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insulation paper is disposed over the entire area of the capacitor mounting wall, then electrical insulation between the capacitor and capacitor mounting wall is improved, but heat dissipation from the capacitor to the capacitor mounting wall is greatly impeded
Solution Approach 1:
The insulation paper is segmented into a first region and a second region. The first region has insulation properties to provide electrical insulation, while the second region has heat dissipation properties (lower thermal resistance) to facilitate heat transfer from the capacitor to the capacitor mounting wall. This segmentation allows the insulation member to simultaneously fulfill both insulation and heat dissipation functions without requiring separate components.
Solution Approach 2:
Different regions of the insulation paper are assigned different functional properties: the first region (where electrical insulation is most needed) has higher insulation properties, while the second region (where heat dissipation is prioritized) has lower thermal resistance. This local differentiation of properties allows optimal performance in both insulation and heat dissipation without compromising either function.
2Reliability
If resin molding is used to fix the capacitor and insulation paper to the capacitor mounting wall, then electrical insulation and mechanical fixation are achieved, but the fixing operation becomes large-scale and production efficiency decreases
Solution Approach 1:
The fixation function is extracted from the resin molding process and assigned to a dedicated fixation member (adhesive layer) positioned between the capacitor and the capacitor mounting wall. This separates the fixation function from the insulation and sealing functions, allowing simpler and faster fixation operations without requiring extensive resin molding, thereby improving production efficiency while maintaining fixation stability.
Solution Approach 2:
A fixation member (adhesive layer) is introduced as an intermediary component between the capacitor and the capacitor mounting wall. This intermediary provides both mechanical fixation and thermal conduction functions, replacing the need for resin molding to achieve fixation. The adhesive layer simplifies the assembly process and improves production efficiency while ensuring stable capacitor positioning.
3Temperature
If the capacitor is fixed directly to the capacitor mounting wall without an insulation member, then heat dissipation is maximized, but electrical insulation between the capacitor and capacitor mounting wall is insufficient
Solution Approach 1:
The insulation member is constructed as a composite structure with a first region having high insulation properties and a second region having high heat dissipation properties (lower thermal resistance). This composite design allows the single insulation member to simultaneously provide both electrical insulation and efficient heat dissipation, eliminating the need to choose between insulation and heat dissipation performance.
Solution Approach 2:
The insulation member is designed to perform multiple functions simultaneously: electrical insulation (through the first region), heat dissipation (through the second region with lower thermal resistance), and mechanical support/positioning of the capacitor. This multi-functionality eliminates the need for separate insulation and heat dissipation components, simplifying the structure while maximizing both insulation and thermal performance.
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 design enhances heat dissipation and simplifies the capacitor fixing process, maintaining a uniform adhesive thickness and stable capacitor posture, thereby improving production efficiency and thermal management.
Implementation Method 1
heat emitted by the capacitor during use of the control device is transmitted to the capacitor mounting wall through the thermally conductive adhesive with high thermal conductivity
Implementation Method 2
the capacitor and the capacitor mounting wall are electrically insulated by the insulation paper
Data Source
AI summary
Provided is a control device that includes a capacitor, a case, an insulation member, and a thermally conductive adhesive with high thermal conductivity. The case has a capacitor mounting wall with high thermal conductivity and accommodates the capacitor inside with the capacitor mounted on the capacitor mounting wall. The insulation member is interposed between the capacitor mounting wall and a portion of the capacitor. The thermally conductive adhesive is interposed in a region between the capacitor mounting wall and the capacitor where the insulation member is not disposed.