Weld Cable Duplex Communication With Distortion Compensation
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Solution Overview
Problem
Welding systems face challenges in accurately and efficiently communicating over weld cables due to distortions caused by the arrangement and characteristics of power cables, which affect the welding process voltage and current, especially in environments where over-the-air communications are impractical.
Innovation Solution
The implementation of weld cable communications (WCC) circuitry that transmits and receives tones to facilitate duplex communications, characterizes weld cables, and compensates for distortions by using channel equalization filter coefficients, allowing for the transmission of data and power simultaneously over the weld cable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If weld cable is used to transmit power, then power delivery is achieved, but communication accuracy deteriorates due to cable distortions
Solution Approach 1:
The patent introduces an intermediary communication system that uses the weld cable as a transmission medium. By treating the cable as both a power conductor and a communication channel, the system enables data transmission alongside power delivery, resolving the contradiction between power delivery and communication accuracy.
Solution Approach 2:
The weld cable is made multi-functional by enabling it to perform both power transmission and data communication functions simultaneously. This universal approach allows the same physical medium to serve dual purposes, eliminating the need for separate communication infrastructure.
2Device complexity
If traditional communication methods are used, then simplicity is maintained, but reliability deteriorates in poor over-the-air conditions
Solution Approach 1:
The weld cable acts as an intermediary communication channel that bypasses the unreliable over-the-air environment. By routing communications through the physical cable connection rather than wireless signals, the system achieves reliable communication without adding significant complexity to the overall system architecture.
3Power
If cable distortions are present, then power transmission is achieved, but data transmission quality deteriorates
Solution Approach 1:
The system employs feedback mechanisms to detect and correct distortions in the weld cable. By monitoring the communication channel characteristics and adjusting transmission parameters accordingly, the system maintains data transmission quality despite the presence of cable distortions that affect power transmission.
Solution Approach 2:
The communication system adapts by changing transmission parameters such as frequency, amplitude, or modulation scheme based on the detected cable characteristics. This dynamic parameter adjustment allows the system to optimize data transmission quality while accounting for the fixed distortions introduced by the power cable's physical properties.
Data Source
AI summary
In one embodiment, a welding system having a welding power supply configured to provide welding power is provided. The welding system additionally includes a weld cable coupled to the welding power supply and configured to transmit the welding power. The welding system further includes a processor configured to transmit and to receive a plurality of tones to provide communications with a device external to the welding power supply via the weld cable.