Method and device for controlling the length of an electrical arc in an arc generating machine
US4435631A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1981 |
| Grant date | Mar 6, 1984 |
| Priority date | — |
| Expiry date | Dec 15, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/25
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In accordance with the method, the arc supplying current is modulated if necessary for generating an acoustical signal. The acoustical signal generated by the arc is detected and its amplitude which, in practice, is a direct function of the actual length of the arc, is compared to a reference amplitude corresponding to the desired length of the electrical arc, in order to determine the algebraic value of their difference. This algebraic value is used for monitoring at least one element of the machine between which the arc forms, and moving this element proportionally to the so-determined algebraic value in order to increase or reduce the actual length of the arc and to bring this length back to the desired length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.