Power Connector Hot Plugging Protection via Segmented Contact Assembly
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Solution Overview
Problem
Power connectors face issues with 'hot plugging,' where live electrical connections or disconnections can cause pins and sleeves to melt, weld together, or result in arc flashes due to high switching energy, compromising their integrity.
Innovation Solution
A power connector design that includes a contact assembly enclosed by a housing, electrically connected to mating members, and an operating mechanism allowing for electrical connection and disconnection while maintaining mechanical coupling, redirecting switching energy away from the pins and sleeves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pins and sleeves are used for direct electrical connection and disconnection, then electrical connectivity is achieved, but switching energy causes melting, welding, and arc flashes
Solution Approach 1:
The connector is divided into two functional parts: a mechanical coupling section (pins and sleeves) and an electrical switching section (contact assembly with movable contact). The mechanical coupling establishes physical connection first, while the electrical switching occurs separately through the movable contact making/breaking connections to the pins, isolating the harmful switching energy from the mechanical coupling components.
Solution Approach 2:
The contact assembly acts as an intermediary between the mechanical coupling and the electrical circuit. The movable contact within the contact assembly makes and breaks electrical connections to the pins, serving as a mediator that handles the high-stress switching operations while protecting the permanent pin and sleeve structures from direct exposure to switching energy.
2Stability of the object's composition
If mechanical coupling is maintained during electrical connection and disconnection, then structural stability is preserved, but switching energy focuses on the mating members
Solution Approach 1:
The connector separates mechanical coupling functions from electrical switching functions. The pins and sleeves maintain stable mechanical coupling throughout operation, while the contact assembly with its movable contact handles all electrical connection and disconnection operations, ensuring switching energy never concentrates on the mechanically coupled pin-sleeve interfaces.
Solution Approach 2:
The contact assembly serves as an intermediary layer between the stable mechanical coupling and the dynamic electrical connections. The movable contact within this intermediary assembly absorbs all switching energy through make/break operations, while the underlying pin-sleeve mechanical coupling remains undisturbed and thermally protected.
3Reliability
If direct connection between pins and sleeves is used, then electrical pathway is established, but arc flashes and welding occur during switching
Solution Approach 1:
The electrical connection path is segmented into multiple stages: mechanical coupling of pins and sleeves, then separate electrical connection through the contact assembly's movable contact. This segmentation ensures that arc flashes and welding only occur at the movable contact interfaces, which are designed to handle such events, while the permanent pin and sleeve structures remain protected from thermal damage.
Solution Approach 2:
The contact assembly with movable contact serves as an intermediary switching mechanism that isolates the harmful arc flash and welding effects from the main electrical pathway. The movable contact makes and breaks connections to the pins through controlled operations, acting as a protective intermediary that absorbs switching stresses while ensuring safe electrical connectivity through the overall assembly.
Data Source
AI summary
An electrical connection element is for a power connector. The power connector includes an electrical component having a number of first electrical mating members. The electrical connection element comprises: a housing including a number of second electrical mating members structured to be electrically connected to the number of first electrical mating members; a contact assembly enclosed by the housing and being electrically connected to the number of second electrical mating members; and an operating mechanism for opening and closing the contact assembly. The contact assembly is structured to electrically connect and disconnect power while the number of first electrical mating members remain mechanically coupled to the number of second electrical mating members.