Plasma Torch Lead Connector Layout for Signal Isolation
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Solution Overview
Problem
Existing connector assemblies for plasma arc torch systems face challenges with signal noise, pressure drops, and limited pin arrangements, which restrict functionality and expansion capabilities, particularly in accommodating additional communication signals and varied power ranges.
Innovation Solution
A connector assembly design with optimized pin spacing and orientation, including distinct circumferential zones and insulative blades, to reduce current creepage and interference, while allowing for quick connect and disconnect functionality and accommodating additional pins for enhanced communication and power capabilities.
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 interference and improper connections occur
Solution Approach 1:
The connector assembly is segmented into distinct functional zones: a first zone for pilot carrying pins and a second zone for control signal pins. This spatial segmentation prevents signal noise interference by physically separating high-current pilot signals from sensitive control signals, while maintaining quick connect and disconnect capability through the overall connector design.
Solution Approach 2:
Different regions of the connector are assigned different functional qualities. The first zone is optimized for high-current pilot signals with appropriate spacing and insulation, while the second zone is optimized for low-voltage control signals. This local differentiation ensures signal integrity for each type while maintaining overall connection speed.
2Reliability
If pin arrangements are optimized for current functionality, then connection reliability is improved, but adaptability for additional pins and expansion is limited
Solution Approach 1:
The connector assembly design incorporates a universal layout with multiple zones that can accommodate different pin configurations. The first zone for pilot carrying pins and the second zone for control signal pins can be populated with varying numbers and types of pins depending on the specific application, allowing the same basic connector design to serve multiple functions and support future expansion with additional communication signals or power ranges.
3Area of stationary object
If pins are placed closer together to maximize space utilization, then device compactness is improved, but current creepage between pins increases
Solution Approach 1:
The connector design uses angular positioning in the radial plane to create sufficient creepage distance between pins. By strategically positioning the first zone and second zone at different angular locations around the central conduit, the design maintains adequate electrical clearance while maximizing space utilization in the radial dimension.
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.