Electric Power Converter Circuit Board Fixing Structure
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Solution Overview
Problem
In electric power converters for vehicles, the second electronic circuit board is difficult to fix securely due to interference from the first circuit board, leading to limited fixing points and vulnerability to vibrations.
Innovation Solution
The electric power converter design includes a container with separate fixing portions for each circuit board, allowing them to be fixed without interference, with an interposition member providing additional support and fixing points, enhancing the overall fixing strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the first electronic circuit board is disposed between the fixation surface and the second electronic circuit board, then the board thickness direction stacking is achieved, but the second electronic circuit board cannot be fixed with increased number of fixing points due to interference
Solution Approach 1:
The patent introduces a longitudinal dimension along the container's length direction, allowing fixing portions to be distributed not only at the four corners but also at intermediate positions along the longitudinal direction. This dimensional expansion of fixing point distribution resolves the interference issue while maintaining the stacked configuration of circuit boards.
2Stability of the object's composition
If the fixing points are limited to the four corners of the circuit board, then the stacking arrangement is maintained, but the fixing points are concentrated and the circuit board is likely to be deformed by external force
Solution Approach 1:
The patent segments the fixing points into multiple independent locations along the longitudinal direction of the container. Instead of concentrating all fixing points at the four corners, the fixing portions are divided and distributed at multiple positions including intermediate locations, reducing the concentration of stress and preventing deformation under external forces.
3Device complexity
If the fixing points are concentrated at the outer periphery of the circuit board, then the stacking arrangement is simplified, but the circuit board is difficult to fix at the desired fixing strength to withstand vibrations
Solution Approach 1:
The patent adds the longitudinal direction as an additional dimension for fixing point distribution. By positioning fixing portions at multiple locations along the longitudinal direction rather than only at peripheral corners, the structure achieves both simplicity and enhanced vibration resistance through distributed fixing.
Data Source
AI summary
An electric power converter includes a semiconductor module, a first electronic circuit board, a second electronic circuit board, and a container that contains the first electronic circuit board and the second electronic circuit board. The container has a first fixing portion to which the first electronic circuit board is fixed and a second fixing portion to which the second electronic circuit board is fixed. The electric power converter is configured such that the second electronic circuit board does not intervene between the first fixing portion of the container and the first electronic circuit board in the board thickness direction and the first electronic circuit board does not intervene between the second fixing portion of the container and the second electronic circuit board in the board thickness direction.