High frequency welding apparatus
US4453073A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1981 |
| Grant date | Jun 5, 1984 |
| Priority date | — |
| Expiry date | Dec 16, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/53835
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Welding apparatus and a method of producing source of welding current. Use is made of an inverter supplied with direct current from a source to pulse a center-tapped primary winding of a transformer at a frequency in excess of the audio range of frequencies, typically 10 KHz to 20 KHz. A secondary winding of the transformer has output terminals for electrical connection to an electrode and work to be welded. The operation of the inverter is controlled by means of a feedback signal derived from a winding inductively coupled to the transformer. The high operating frequency results in a significant reduction in the mass and dimensions of the welder compared to conventional welders which operate at mains frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.