Patent · US Expired

Method for noise reduction

US5138132A · kind A · utility

6Cited by

1References

1Claims

0Family size

Assignee

Rehm Schweisstechnik GmbH u. Co. · DE

Inventors

Klaus Baurle · Schallstadt, DE
Florian Maciaszczyk · Großenhain, DE
Wolfgang Schuster · Wien, AT

Key dates

Filing date	Feb 25, 1991
Grant date	Aug 11, 1992
Priority date	—
Expiry date	Feb 25, 2011

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23K9/095
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

This invention relates to a method for noise reduction and stabilization of the welding arc in TIG-ac-welding machines with self-commutated inverter current sources where the alternating frequency of the welding current is preferably changed in the inverse direction as a function of the amount of the welding current.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.