Capacitor Frame Integration for Train Power Conversion
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Solution Overview
Problem
The existing power conversion apparatus for trains has a complex structure due to the housing required to accommodate and stabilize the heavy molded capacitor, which is necessary for high-capacity DC to AC power conversion, leading to structural complications.
Innovation Solution
A power conversion apparatus with a simple structure that utilizes an electric circuit element, a cooler, a connection frame, capacitors, and frames to form a structural member, where the capacitors are supported by frames and connected via electrical conductors, allowing for heat dissipation and structural integrity without additional structural members above or under the capacitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a molded capacitor with multiple capacitor elements is employed to obtain high capacity, then the capacitance requirement is satisfied, but the weight increases to 25-60 kg causing vibration during train movement
Solution Approach 1:
The patent combines the capacitor unit with the frame structure by fixing the capacitor to the frame member, merging two previously separate components (capacitor housing and support structure) into a single integrated assembly, thereby eliminating the need for additional support structures and reducing overall weight
2Strength
If a housing with frame members and reinforcing members is provided to ensure strength for the heavy capacitor, then structural strength is sufficient, but the structure becomes complicated
Solution Approach 1:
The capacitor housing and support structure are merged into a single integrated component where the frame member serves dual purposes as both structural support and capacitor mounting base, eliminating the need for separate reinforcing members and mounting plates
Solution Approach 2:
The frame member is designed to perform multiple functions simultaneously: providing structural strength, serving as a mounting surface for the capacitor, and acting as part of the overall support system, thereby reducing the number of dedicated components needed
3Stability of the object's composition
If a box-shaped housing with mounting plate is provided to accommodate the molded capacitor, then the capacitor is firmly fixed, but additional structural members are required increasing complexity
Solution Approach 1:
The mounting plate function is merged into the frame member itself, which provides both the structural support and the mounting surface in a single component, eliminating the need for separate mounting plates and reducing the total number of parts
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 ensures sufficient strength and stability with a simplified structure, enhancing heat dissipation and reducing weight, thereby improving the overall efficiency and reliability of the power conversion apparatus.
Implementation Method 1
The cooler is attached to the electric circuit element and is configured to cool the electric circuit element by releasing into the air the heat generated by the electric circuit element during operation
Data Source
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AI summary
A frame portion (114) is a plate-like member to which a cooler is attached for cooling an electric circuit element (101) configured to operate for power conversion that causes generation of heat. The capacitor (104) is a structural member disposed in a direction perpendicular to the frame portion (114) and including a capacitor element electrically connected to the electric circuit element (101). The capacitor (104) includes a first support surface and a second support surface that are external surfaces facing in opposite directions from each other and parallel to the direction perpendicular to the frame portion (114). The first frame (105) and the second frame (106) each have an end portion fixed to a connection frame (103). The first frame (105) includes a first attachment surface (125) fixed to a first support surface (117). The second frame (106) includes a second attachment surface (132) fixed to a second support surface (118).