CA2142776A1 - Controllable Inverter Power Supply - Google Patents

Controllable Inverter Power Supply

Info

Publication number
CA2142776A1
CA2142776A1 CA2142776A CA2142776A CA2142776A1 CA 2142776 A1 CA2142776 A1 CA 2142776A1 CA 2142776 A CA2142776 A CA 2142776A CA 2142776 A CA2142776 A CA 2142776A CA 2142776 A1 CA2142776 A1 CA 2142776A1
Authority
CA
Canada
Prior art keywords
power
output
source
current
power supply
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2142776A
Other languages
French (fr)
Other versions
CA2142776C (en
Inventor
Jon O. Reynolds
Michael D. Madsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Miller Electric Manufacturing Co
Original Assignee
Miller Electric Manufacturing Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Miller Electric Manufacturing Co filed Critical Miller Electric Manufacturing Co
Publication of CA2142776A1 publication Critical patent/CA2142776A1/en
Application granted granted Critical
Publication of CA2142776C publication Critical patent/CA2142776C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
    • B23K9/1006—Power supply
    • B23K9/1043—Power supply characterised by the electric circuit

Abstract

In accordance with the present invention a power supply for providing an ac/dc output to a load is disclosed.
The power supply includes a first source of dc power and an inverter that provides an ac output to the load. A second source of dc power is provided and selectably connects the first and second sources of dc power in series with the load when the output current reverses. In one embodiment the power sources are connected in series with every output current reversal. The first source of dc power is controllable and the magnitude of the dc current is responsive to a current reference signal. A control circuit provides the current reference signal, wherein the current reference signal is pulsed immediately prior to the ac output reversing polarity. The first source of dc power source preferably includes a buck converter that is switched at a variable frequency, depending upon the desired output current. In the event the user selects either an ac or dc electrode negative output a period of electrode positive dc energy is provided at start up to help establish the arc.
CA002142776A 1994-03-03 1995-02-17 Controllable inverter power supply Expired - Fee Related CA2142776C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US206,057 1994-03-03
US08/206,057 US5444356A (en) 1994-03-03 1994-03-03 Buck converter having a variable output and method for buck converting power with a variable output

Publications (2)

Publication Number Publication Date
CA2142776A1 true CA2142776A1 (en) 1995-09-04
CA2142776C CA2142776C (en) 1998-02-24

Family

ID=22764797

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002142776A Expired - Fee Related CA2142776C (en) 1994-03-03 1995-02-17 Controllable inverter power supply

Country Status (4)

Country Link
US (3) US5444356A (en)
EP (2) EP0670623B1 (en)
CA (1) CA2142776C (en)
DE (1) DE69519533T2 (en)

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US9656340B2 (en) 2012-09-24 2017-05-23 Lincoln Global, Inc. Systems and methods providing low current regulation for AC arc welding processes
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US9199327B2 (en) * 2013-01-29 2015-12-01 Shenzhen Jasic Technology Co., Ltd. Portable IGBT arc welding machine
US9550249B2 (en) * 2013-01-31 2017-01-24 Victory Equipment Company High power factor rectifier/filter for three phase input welder or plasma cutter
US9555494B2 (en) 2013-03-04 2017-01-31 Lincoln Global, Inc. System and method for auxiliary power generator with selectable frequency
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Also Published As

Publication number Publication date
US5710696A (en) 1998-01-20
DE69519533D1 (en) 2001-01-11
EP0670623B1 (en) 2000-12-06
EP0977347A3 (en) 2001-02-07
US5615095A (en) 1997-03-25
US5444356A (en) 1995-08-22
CA2142776C (en) 1998-02-24
EP0670623A2 (en) 1995-09-06
EP0977347A2 (en) 2000-02-02
DE69519533T2 (en) 2001-05-31
EP0670623A3 (en) 1996-06-26

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Effective date: 20130218