Detachable Coupling Member Structure for Vibration-Stable Power Modules
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Solution Overview
Problem
Modular power electronic devices face issues such as damage, difficulty in maintenance, and instability due to incomplete connections, vibrations, and arbitrary movement when detachably coupled to a base, leading to increased risk of damage and reduced operational reliability.
Innovation Solution
A coupling member with a detachable structure featuring coupling arms, support arms, and guide grooves that stabilize the connection between the power electronic device and a terminal member, preventing damage from vibrations and arbitrary movement, and allowing for easy maintenance by detaching only the coupling member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a PLC is detachably coupled to a base, then modular configuration and flexibility are improved, but connection stability and risk of damage increase
Solution Approach 1:
The coupling structure is divided into separate coupling members on the PLC and base, each with complementary coupling portions. This segmentation allows the PLC to be detachably coupled to the base while maintaining stable connection through the distributed coupling portions that prevent arbitrary separation and reduce damage risk.
Solution Approach 2:
The coupling members extend in multiple directions (height direction and length direction) to provide multi-dimensional coupling. This dimensional approach enhances connection stability by distributing coupling forces across multiple spatial dimensions, preventing arbitrary movement while maintaining modular flexibility.
2Strength
If a PLC cover is formed as an integral type, then rigidity is improved, but maintenance complexity and time increase
Solution Approach 1:
The PLC cover is divided into a cover body and separate coupling members. This segmentation allows the coupling members to be detached and replaced independently for maintenance, while the cover body maintains its rigidity. The separate coupling members can be easily replaced without removing the entire cover, significantly reducing maintenance complexity.
3Device complexity
If a PLC cover is formed as an integral type, then structural simplicity is improved, but stress concentration and damage risk increase
Solution Approach 1:
The coupling members are separated from the cover body, creating distinct structural elements. This segmentation distributes mechanical stress away from the cover body to the dedicated coupling members, reducing stress concentration at coupling portions. The cover body maintains structural simplicity while the separate coupling members absorb mechanical stresses from coupling and decoupling operations.
4Ease of manufacture
If components are provided as an integral type, then manufacturing simplicity is improved, but operational reliability decreases
Solution Approach 1:
The coupling members are provided as separate components from the cover body and internal components. This segmentation allows each component to be manufactured independently using optimized processes, then assembled together. The separate coupling members can be replaced if damaged, preventing damage to internal components and maintaining operational reliability.
Data Source
AI summary
Disclosed are a coupling member and a power electronic device including same. A coupling member according to an aspect of the present disclosure is a coupling member that is removably coupled to an external power electronic device, and includes: a coupling body; and a coupling arm that extends from one side of the coupling body in the height direction and is removably coupled to the power electronic device, wherein the coupling arm includes a coupling extension portion extending from the one side of the coupling body into the inside of the power electronic device and a coupling protrusion that protrudes from an end of the coupling extension portion and is coupled to an inner surface of the power electronic device, wherein a plurality of coupling arms are provided, and the plurality of coupling arms may be arranged to be spaced apart from each other along one direction.