Rotating Machine Power Interconnection Segmentation
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Solution Overview
Problem
Existing power interconnection solutions for rotating electrical machines, such as alternator-starters, face challenges with complex trace realization and insufficient current-carrying capacity, leading to overheating issues due to small power interconnection traces.
Innovation Solution
A power interconnection part with independent, non-overmolded electrical terminals and nested, concentric power traces that are not overlapped, allowing for larger trace sections to handle higher currents, and featuring a dissipator with a base plate and attachment devices for secure integration with electronic modules and a heatsink.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If power traces are integrated into a peripheral belt with electronic components, then device integration is improved, but the power interconnection trace sections become too small to handle required currents, leading to excessive temperature
Solution Approach 1:
The power interconnection system is segmented into two distinct parts: a peripheral belt containing electronic components and signal traces, and a separate power interconnection piece with dedicated power traces. This segmentation allows each component to be optimized independently - the peripheral belt for signal integration and the power piece for high-current handling with sufficient trace cross-sections
Solution Approach 2:
The power interconnection piece is positioned in a different spatial dimension (axial direction) from the peripheral belt, rather than integrating power traces within the same plane. This dimensional separation allows power traces to have larger cross-sections without constraining the peripheral belt layout, effectively resolving the temperature issue while maintaining integration
2Quantity of substance
If power traces are made larger to handle higher currents, then current-carrying capacity is improved, but the space available for electronic components and traces is reduced
Solution Approach 1:
By separating the power interconnection function from the electronic component integration, the patent creates dedicated space for large power traces in the power interconnection piece without reducing the surface area available for electronic components in the peripheral belt. Each segment serves its specific function with appropriate dimensions
Solution Approach 2:
The power interconnection piece is placed in the axial direction (different dimension) from the peripheral belt, allowing power traces to extend radially with sufficient cross-sectional area without encroaching on the planar space needed for electronic components and signal traces
3Ease of manufacture
If power traces are overmolded with signal traces in the same structure, then manufacturing is simplified, but the power trace sections become insufficient for required current levels
Solution Approach 1:
The patent segments the manufacturing into two independent parts: the peripheral belt with signal traces and the power interconnection piece with power traces. This allows each part to be manufactured separately with optimal trace dimensions - signal traces in the belt and large power traces in the power piece - then assembled together
Solution Approach 2:
By placing the power interconnection piece in the axial direction rather than integrating it in the same plane, the patent enables power traces to have sufficient cross-sections without compromising the manufacturing simplicity of the peripheral belt. The separate positioning allows independent optimization of both components
Data Source
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AI summary
The invention concerns a power interconnecting part (21) for an electrical rotating machine. The inventive power interconnecting part (21) comprises at least one power trace provided with power electrical terminals (2120, 2110, 217d) designed to co-operate with a power trace (103, 104) of an electronic module (10) so as to distribute an electrical power to said module (10), said module being incorporated on said machine.