Method and apparatus for electronically controlling the output of an engine driven generator welding power supply
US6005220A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 1998 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Feb 20, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/1006
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for providing a welding output is disclosed. The apparatus includes a an ac generator having a field winding, a welding output winding and an electronic field controller connected to the field winding. The controller receives a current feedback signal and a voltage feedback signal, and shapes the output curve in response to the desired output command signals. According to one embodiment the controller also receives a field current feedback signal. The controller may shape the output curves to emulate a DC generator, for example by causing the welding output V-A curves to have multiple breakpoints, and/or a substantially preset slope over a welding range wherein the preset slope does not vary over the output current range of the power supply. Also, the slope of the V-A output curve below the welding range may be different than the slope in the welding range. An auxiliary output winding having a substantially constant voltage may be provided on the generator and the generator may be either single or three phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.