Busbar Current-Guiding Profile Layout for Thermal Expansion Alignment
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Solution Overview
Problem
Existing busbar arrangements with current-carrying profiles face challenges in thermal expansion, leading to significant length changes and misalignment issues when multiple profiles are connected, particularly due to differing expansion rates of metal and plastic components, which complicates electrical connections and increases costs.
Innovation Solution
The current-carrying profiles are positively locked to the metal trough in the central region (30% to 70% of their length) to prevent longitudinal movement, allowing only expansion at the ends, while the end regions are movable, ensuring minimal length offset and reduced risk of twisting, using embossings and stop troughs for secure positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If current-carrying profiles are rigidly fixed along their entire length to prevent thermal expansion, then alignment stability is improved, but thermal stress and deformation increase
Solution Approach 1:
The current-carrying profile is divided into two functional zones: a central fixed region (40-60% of length) that maintains alignment stability, and end regions (20-30% each) that are movable to accommodate thermal expansion. This segmentation allows simultaneous achievement of both alignment stability and thermal stress resistance.
Solution Approach 2:
Different portions of the current-carrying profile have different fixation characteristics: the central region has high fixation strength to prevent misalignment, while the end regions have reduced fixation to allow thermal expansion. This local differentiation of properties resolves the contradiction between stability and thermal stress.
2Adaptability or versatility
If flexible electrical conductors are used to compensate for thermal expansion, then length compensation is improved, but system cost increases
Solution Approach 1:
The current-carrying profile itself provides length compensation through its movable end regions, eliminating the need for separate flexible conductor mechanisms. The profile's own structure enables thermal expansion accommodation, reducing system complexity and cost.
Solution Approach 2:
The end regions of the current-carrying profile are designed to be dynamically movable rather than rigidly fixed, allowing automatic adaptation to thermal expansion without requiring additional flexible components or complex adjustment mechanisms.
3Productivity
If multiple current-carrying profiles are connected in alignment, then electrical distribution capability is improved, but cumulative length offset and misalignment increase
Solution Approach 1:
By segmenting each profile into fixed and movable regions, the invention ensures that only the central aligned portions contribute to electrical connection precision, while end regions independently accommodate expansion. This prevents cumulative misalignment in multi-profile installations.
Solution Approach 2:
The movable end regions act as pre-designed compensation zones that absorb thermal expansion before it can affect the aligned central regions. This beforehand cushioning prevents cumulative length offset from propagating through multiple connected profiles.
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 solution effectively minimizes the length offset due to thermal expansion, maintains alignment between connected profiles, and enhances stability by allowing controlled expansion, reducing the need for costly flexibility mechanisms.
Implementation Method 1
Under the usual thermal load, the electrical conductors made of metal, the metal trough and the support profile made of plastic, i.e. the current-carrying profile, expand differently. This can lead to significant changes in length or shifts in length during operation.
Data Source
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AI summary
A busbar arrangement (1) with a metal trough (2) extending in a longitudinal direction (L) and with current-carrying profiles (5) also extending in a longitudinal direction (L) is described. The current-carrying profiles (5) have several grooves (8) extending parallel to each other in the longitudinal direction (L) and bounded laterally by webs (7) and at the bottom of the grooves (13) by a base (6) connecting the webs (7). Electrical conductors are accommodated in the grooves (8). The current-carrying profiles (5) are installed in the metal trough (2). In the central region (MB) of 30% to 70% of their length, the current-carrying profiles (5) are positively connected (9) to the metal trough (2) and are relatively movable relative to the metal trough (2) at their end regions adjoining the central region (MB) in the longitudinal direction (L).