Circuit Assembly Bus Bar Gate Terminal Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional circuit assemblies incur increased manufacturing costs due to the need for separate heat-resistant control boards and the use of inter-board connectors for connecting semiconductor elements, particularly when mounting FETs.
Innovation Solution
A circuit assembly design featuring a first and second bus bar for power circuit connections and a control board with a third bus bar connecting the gate terminal directly to the control board, eliminating the need for inter-board connectors and reducing processing costs by avoiding bending operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a conventional circuit assembly uses separate heat-resistant control boards connected by inter-board connectors, then heat resistance is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines the control board and power circuit board into a single integrated board structure. The control circuit is mounted on a control board that is directly integrated with the power circuit board, eliminating the need for separate heat-resistant control boards and inter-board connectors. This integration maintains heat resistance while reducing manufacturing cost by simplifying the assembly structure.
2Reliability
If the gate terminal is bent to connect to the board, then electrical connection is achieved, but manufacturing cost increases
Solution Approach 1:
The patent incorporates a bus bar extension that pre-extends from the power circuit board toward the control board. This extension is prepared in advance during board manufacturing, so that when the semiconductor element is mounted, the gate terminal can be directly connected to the extended bus bar without requiring bending operations. This preliminary preparation eliminates costly bending processes while ensuring reliable electrical connection.
3Reliability
If inter-board connectors are used to connect control board and power circuit board, then electrical connection is achieved, but device complexity increases
Solution Approach 1:
The patent integrates the control board and power circuit board into a single unified board structure, eliminating the need for inter-board connectors. The control circuit is mounted on the control board that is directly integrated with the power circuit board, creating a simplified single-board architecture that reduces structural complexity while maintaining reliable electrical connections through direct trace connections.
Data Source
AI summary
A circuit assembly is provided. The circuit assembly includes: a first bus bar and a second bus bar that are part of a power circuit; and a control board to which a control circuit configured to control current flow in the power circuit is mounted, the circuit assembly including: a semiconductor switching element including a drain terminal and a source terminal that are connected to the first bus bar and the second bus bar, respectively, and a gate terminal configured to receive input of a control signal from the control circuit configured to control current flow in the power circuit; and a third bus bar configured to electrically connect the gate terminal and the control board.