Transformer module for a welder
US6998573B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2003 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Jan 14, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F30/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric arc welder comprising a high switching frequency inverter for driving the primary of an output transformer where the output transformer has a plurality of modules forming the secondary windings of the transformer and each of the modules comprises a first coaxial set of concentric, telescoped tubes separated by a tubular insulator, a second coaxial set of concentric, telescoped conductive tubes separated by a tubular insulator wherein the sets each have an elongated central passage for accommodating the primary and a conductor connecting the tubes into a series circuit. These modules form a transformer for such welder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.