Plasma torch electronic pulsing circuit
US5170030A · kind A · utility
23Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1991 |
| Grant date | Dec 8, 1992 |
| Priority date | — |
| Expiry date | Sep 18, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H1/36
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A plasma arc torch having new electronic circuit concepts wherein main current regulated power means regulates the pilot current prior to main arc transfer. Further, the circuit may contain two inductors to which DC current initially flows but is interrupted upon main arc transfer such that one inductor maintains the pilot arc while the current in the second inductor forces the establishment of the transferred arc. Also, advantages are presented in pulsing the cutting arc as well as pulsing the pilot arc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.