Method for regulating and/or controlling a welding current source with a resonance circuit
US6849828B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 19, 2001 |
| Grant date | Feb 1, 2005 |
| Priority date | — |
| Expiry date | Jun 17, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/1056
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention describes a method of controlling a welding current source (2) having a resonant circuit (27), whereby a bridge circuit (28) is controlled by a control system (4). A consumer, in particular a welding process, is supplied with energy via the bridge circuit (28) from a power source (29). In order to control the individual switching elements (32-35) of the bridge circuit (28), fixed pre-set control states S1 to S6 are stored and, during normal operation, the bridge circuit (28) is controlled on the basis of the control states S1 to S4 one after the other. If a change in resistance occurs at the consumer, the control system (4) switches to a special operating mode at the resonance frequency of the resonant circuit (27) and the bridge circuit (28) is controlled on the basis of the stored control states in order to run the special operating mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.