System and method for controlling an electric arc welder
US6498321B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2001 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | May 3, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/1056
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A control system for an electric arc welder performing a welding process between an electrode and a workpiece, which system comprises: a high speed switching type power supply with a controller operated at a switching frequency of at least about 10 kHz with an input current control signal to adjust the output current of the power supply; a first sensor sensing the actual arc voltage; a second sensor sensing the actual arc current; a first circuit for creating a power signal representing the desired real time power level at progressive times during the welding process; a second circuit for creating a function of the sensed actual voltage and the sensed actual current; and a third circuit for adjusting the current control signal in accordance with the difference between the power signal and the function of the actual voltage and current, preferably arc power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.