Welding Cable Distortion Compensation via Digital Filter Coefficients
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing welding systems face inefficiencies in measuring and compensating for distortions in weld cable voltage and impedance, which can affect the welding process, making it cumbersome and inefficient to correct for frequency and time-dependent amplitude and phase distortions.
Innovation Solution
A welding system with a processor and weld cable communications circuitry that transmits and receives data to determine channel equalization filter coefficients, allowing for compensation of distortive characteristics in the weld cable by applying digital filter functions to modulated and unmodulated tones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If voltage sensors or interference variable measurements are used to determine welding voltage or weld cable impedance, then measurement accuracy can be achieved, but the process becomes cumbersome and inefficient
Solution Approach 1:
The patent replaces physical voltage sensors and manual measurement devices with digital signal processing methods. Channel equalization filter coefficients are used to compensate for cable distortions, and digital filters process modulated tones to determine welding voltage and impedance, eliminating the need for cumbersome physical sensors and manual measurement procedures
Solution Approach 2:
The patent introduces channel equalization filter coefficients as an intermediary element that compensates for cable distortions. These coefficients act as a mediator between the transmitted modulated tones and the received signals, enabling accurate voltage and impedance determination without direct physical measurement at the cable ends
2Reliability
If channel equalization filter coefficients are determined and digital filter functions are applied to compensate for distortions, then welding voltage and current consistency is improved, but system complexity increases
Solution Approach 1:
The patent performs preliminary determination of channel equalization filter coefficients before actual welding operations. By pre-calculating and storing these coefficients that compensate for cable distortions, the system avoids real-time complex calculations during welding, thereby improving voltage consistency without proportionally increasing operational complexity
Solution Approach 2:
The patent transforms the complex problem of distortion compensation by changing parameters from direct voltage measurement to frequency-domain analysis using modulated tones. Channel equalization filter coefficients operate in the frequency domain to compensate for amplitude and phase distortions, converting a complex time-domain problem into manageable frequency-parameter adjustments
Data Source
AI summary
A welding system having a welding power supply and a processor is provided. The welding power supply is configured to provide a welding power for a welding application through a weld cable. The processor is disposed within the welding power supply and the processor is configured to transmit and receive data related to a welding operating parameter through the weld cable. The processor is also configured to determine an equalization filter coefficient related to the weld cable.