Inverter Module Bus Bar Layout for Miniaturization
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Solution Overview
Problem
Existing inverter modules face challenges in miniaturization and increased size due to the configuration of switching elements and bus bars, which affects their overall efficiency and mountability.
Innovation Solution
The inverter module is designed with switching elements disposed in a specific arrangement, where upper-stage and lower-stage elements are aligned in orthogonal directions, and bus bars are positioned to minimize component count and optimize space usage, allowing for compact integration and improved cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If multiple inverter modules are provided separately for each phase, then the inductance of the inverter circuit is reduced, but the overall size increases
Solution Approach 1:
The patent merges multiple inverter modules for different phases into a single integrated inverter module. The first inverter module (first phase) and second inverter module (second phase) are combined in one housing, reducing the number of separate modules while maintaining low inductance through optimized internal layout of switching elements and bus bars.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement within the housing to accommodate multiple inverter modules. By arranging switching elements and bus bars in specific spatial configurations (different dimensions and orientations), the design achieves low inductance without increasing the external footprint, effectively using vertical and lateral space efficiently.
2Reliability
If switching elements and bus bars are arranged in conventional configurations, then electrical connectivity is maintained, but miniaturization becomes difficult
Solution Approach 1:
The inverter module is segmented into distinct functional units (first inverter module for first phase, second inverter module for second phase) with clearly defined switching element groups and bus bar connections. This segmentation allows for optimized routing of electrical connections while maintaining compact overall dimensions.
Solution Approach 2:
The patent employs multi-dimensional arrangement of components - switching elements are positioned at different heights and lateral positions, bus bars extend in multiple directions (first direction, second direction perpendicular to first). This three-dimensional connectivity approach reduces the planar footprint while ensuring reliable electrical paths between all components.
Data Source
AI summary
In an inverter module (10) including a plurality of switching elements (11), a positive-polarity bus bar (14), a negative-polarity bus bar (15), and a plurality of output bus bars (16, 17, and 18), the plurality of output bus bars (16, 17, and 18) are disposed in a first direction (D1) in which upper-stage-side switching elements (11U) and lower-stage-side switching elements (11L) are placed side by side, and the positive-polarity bus bar (14) and the negative-polarity bus bar (15) are disposed in a second direction (D2) intersecting the first direction (D1).