Title:
【発明の名称】溶接のためのインダクタンス制御を有する直流チョッパー
Document Type and Number:
Japanese Patent JP3101814
Kind Code:
B2
Abstract:
A multi-stage down chopper for arc welding by creating current flow between an electrode and a workpiece, the chopper includes a D.C. input source, a first switching stage, with a first switch device and a first choke, this first stage selectively connects the D.C. input source across the electrode and workpiece at a controlled duty cycle and switching rate and a second switching stage, with a second switch device and a second choke, the second stage also selectively connects the D.C. input source across the electrode and workpiece at the aforesaid controlled duty cycle and switching rate, wherein the chopper is improved by the first and second chokes onto a single core and by providing a minimum current override feedback circuit.
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Inventors:
Ivan ebaker
Application Number:
JP20930298A
Publication Date:
October 23, 2000
Filing Date:
July 24, 1998
Export Citation:
Assignee:
The Lincoln Electric Company
International Classes:
B23K9/09; H02M3/145; H02M3/155; H02M3/156; B23K9/073; H02M9/00; (IPC1-7): B23K9/073; H02M3/155; H02M9/00
Domestic Patent References:
| JP6068164A | ||||
| JP63313668A | ||||
| JP7112275A | ||||
| JP10175070A | ||||
| JP57115974A | ||||
| JP5762864A | ||||
| JP57165373U | ||||
| JP641969U | ||||
| JP638983B2 | ||||
| JP6230072B2 | ||||
| JP6217161Y2 | ||||
| JP216862Y2 |
Attorney, Agent or Firm:
Takehiko Saito (1 outside)