Electric Device Insulation Segmentation for Convection Cooling
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Solution Overview
Problem
Electrical devices controlling machines require large amounts of insulating material for effective insulation, leading to high production costs and inefficient cooling due to material constraints.
Innovation Solution
The design incorporates a space between insulation zones that reduces the amount of insulating material needed, allowing for air circulation and improved cooling through convection, while maintaining effective insulation by strategically placing insulating material around critical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large amount of insulating material is used to guarantee effective insulation of electronic units, then insulation reliability is improved, but production costs increase
Solution Approach 1:
The electrical device is divided into distinct first and second zones with different insulation requirements. The first zone contains high-voltage components requiring comprehensive insulation, while the second zone contains low-voltage control components requiring minimal insulation. This segmentation allows insulating material to be applied selectively only where necessary, reducing overall material consumption while maintaining insulation reliability in critical areas.
Solution Approach 2:
Different insulation strategies are applied to different spatial regions based on their specific electrical stress requirements. The first zone near high-voltage components receives full insulating material coverage, while the second zone is left partially exposed or receives minimal insulation. This local differentiation optimizes the balance between insulation effectiveness and material usage.
2Reliability
If insulating material is used to surround electronic units, then insulation effectiveness is improved, but cooling efficiency deteriorates
Solution Approach 1:
The device structure separates insulated regions from non-insulated regions, creating dedicated cooling channels in the second zone where insulating material is absent or minimal. This allows cooling air to flow freely around heat-generating components in the second zone while the first zone maintains full insulation for electrical safety.
Solution Approach 2:
A partition wall or insulating barrier is introduced between the first and second zones to prevent electrical breakdown while allowing thermal management. This intermediary structure enables the first zone to be fully insulated for high-voltage isolation while the second zone remains accessible for convective cooling, thus mediating between insulation requirements and cooling needs.
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 approach decreases production costs and enhances cooling efficiency by minimizing the use of insulating material while ensuring effective insulation and preventing short-circuits.
Implementation Method 1
this space allows air circulation between the first and the second zone and around the third zone, and thus better cooling of the electrical device by convection
Data Source
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AI summary
The invention relates to an electrical device (10), in particular intended to control an electrical machine, comprising: - a first zone filled with an insulating material (A) and comprising a first electronic unit (12) embedded in the insulating material (A); - a second zone filled with an insulating material (B) and comprising a second electronic unit (18) embedded in the insulating material (B); and - a third zone filled with an insulating material (B) and comprising at least one electrical connection element (22) embedded in the insulating material (B), the at least one electrical connection element (22) connecting the first electronic unit (12) with the second electronic unit (18); wherein the first and second zones are each in contact with the third zone such that the electrical device comprises at least one space extending around the third zone and between the first and second zones.