Plasma cutter for auxiliary power output of a power source
US6130398A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1998 |
| Grant date | Oct 10, 2000 |
| Priority date | — |
| Expiry date | Jul 9, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K10/006
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A plasma arc cutting power supply, and method of providing plasma cutting power, is disclosed. It includes a source of power having, preferably an engine or transformer based power source, that provides a main power output and an auxiliary power output. A two-state configuration circuit is in electrical communication with the auxiliary power output. The auxiliary power output receives voltage of a first magnitude with a non-floating ground when the configuration circuit is in its first state. The auxiliary power output receives voltage of a second magnitude, preferably different than the first magnitude, with a floating ground, when the configuration circuit is in its second state. When a plasma cutting circuit is connected to the auxiliary power output the configuration circuit is set in its second state. The plasma cutting circuit includes at least one chopper. A safety circuit that disables the plasma output includes a GFI or optical isolator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.