Plasma Torch Lead Connector Pin Zoning for Signal Integrity
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Solution Overview
Problem
Existing connector assemblies for plasma arc torch systems face challenges in quick connect and disconnect operations, leading to signal noise issues, pressure drops, and limited functionality due to inadequate pin arrangements, which restrict the accommodation of additional pins for advanced features like RFID communication and increased power supply.
Innovation Solution
A connector assembly design with optimized pin spacing and orientation, including distinct circumferential zones for pilot and control signal pins, and the use of insulative blades to reduce current creepage, allowing for more pins and improved signal integrity while preventing noise interference and improper connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If existing connector designs are used for quick connect and disconnect, then connection speed is improved, but signal noise issues and pressure drops occur
Solution Approach 1:
The connector pins are divided into distinct circumferential zones (pilot zone, control zone, communication zone) with insulative blades between them, segmenting the electrical pathways to prevent noise interference while maintaining quick connect capability
Solution Approach 2:
Insulative blades are introduced as intermediary elements between different pin zones to block electrical noise and prevent unwanted current creepage, thereby improving signal integrity without sacrificing connection speed
2Device complexity
If existing pin arrangements are used, then connection simplicity is maintained, but functionality is limited due to inadequate space for additional pins
Solution Approach 1:
The patent utilizes the circumferential dimension around the central conduit to arrange pins in multiple zones, maximizing the use of available space and accommodating additional pins for RFID, pilot current, and communication functions without increasing overall connector complexity
Solution Approach 2:
The connector design incorporates multiple pin types (pilot pins, control pins, communication pins) within a single universal connector structure, enabling the same connector to support various torch functionalities including RFID communication, additional gas control, and enhanced power supply
3Quantity of substance
If pins are placed closer together to fit more pins, then space utilization is improved, but creepage distance is reduced leading to current leakage
Solution Approach 1:
Insulative blades are positioned between adjacent pin zones to act as electrical barriers, maintaining adequate creepage distance and preventing current leakage even when pins are densely arranged to maximize space utilization
Solution Approach 2:
The insulative blades provide localized electrical insulation between specific pin zones while allowing other areas to maintain close pin spacing, optimizing both the number of pins and electrical safety through spatially differentiated properties
Data Source
AI summary
A lead connector is provided for connecting a plasma torch lead of a plasma arc torch to a power supply of a plasma cutting system. The lead connector includes a base portion, a central conduit disposed in the base portion, where the central conduit is configured to carry a gas and a torch current to the plasma arc torch, and multiple pins disposed radially about a center of the central conduit. The pins are located at a radius of between about 0.4 inches and about 0.65 inches from the center of the central conduit on a radial plane of the base portion. The pins include one or more pilot carrying pins and one or more control signal pins located from about 27 degrees to about 64 degrees and from about 120 degrees to about 170 degrees, respectively, about the center of the central conduit on the radial plane.