Terminal Block Cover Segmentation for Aircraft IDG Creep Protection
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Solution Overview
Problem
Integrated drive generators in aircraft face challenges in maintaining a constant frequency of electric power generation due to varying input shaft speeds, requiring speed trimming mechanisms to stabilize output frequency, and existing terminal block designs lack effective protection and spacing for efficient power transmission.
Innovation Solution
A terminal block cover with specific geometric dimensions and rib structures provides enhanced creep and lightning protection, supporting the terminal connections with intermediate spacing channels and ribs to ensure stable and secure power transmission, while allowing for easy replacement and alignment with the integrated drive generator's operational requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal block cover uses a simple design without intermediate spacing channels, then the device complexity is reduced, but the protection against creep and lightning is insufficient
Solution Approach 1:
The terminal block cover is segmented into multiple functional regions including intermediate spacing channels that physically separate terminal connections. This segmentation provides creep and lightning protection by creating isolation barriers between adjacent terminals, preventing harmful electrical discharge paths while maintaining a relatively simple overall cover structure.
Solution Approach 2:
The intermediate spacing channels act as intermediary structures between adjacent terminal connections. These channels serve as protective mediators that prevent direct electrical contact and reduce the risk of creep and lightning damage, while adding minimal structural complexity to the cover design.
2Reliability
If the terminal block cover includes intermediate spacing channels and ribs for protection, then the reliability is improved, but the manufacturing complexity increases
Solution Approach 1:
The protective structure is segmented into standardized intermediate spacing channels and ribs that can be integrated into the cover molding process. This segmentation allows for reliable protection while using conventional manufacturing techniques to minimize complexity.
Solution Approach 2:
The intermediate spacing channels and protective ribs are merged into a single integrated cover structure rather than being separate components. This combining approach maintains reliable protection functionality while simplifying manufacturing by reducing the number of parts and assembly steps.
Data Source
Figure 1A~1B
Figure 2A~2D
Figure 2E
AI summary
A terminal block cover (104) for use in an integrated drive generator has a body (105) having a closed outer face and extending to an open inner face, and having an open side (118) and a closed side (116). There are four connection channels (108) for receiving electric connections for each of three phases of power and a neutral, and they extend from the closed side to the open side. There are spacing channels (110) formed between adjacent ones of each of the four connection channels, with the spacing channels being formed by two spaced ribs (112, 114) with an interior space. An integrated drive generator and a method are also disclosed.