JPS561271A - Direct current welding electric power source device - Google Patents

Direct current welding electric power source device

Info

Publication number
JPS561271A
JPS561271A JP7741779A JP7741779A JPS561271A JP S561271 A JPS561271 A JP S561271A JP 7741779 A JP7741779 A JP 7741779A JP 7741779 A JP7741779 A JP 7741779A JP S561271 A JPS561271 A JP S561271A
Authority
JP
Japan
Prior art keywords
transformer
direct current
conduct
power source
electric power
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.)
Pending
Application number
JP7741779A
Other languages
Japanese (ja)
Inventor
Yoriaki Nishida
Hisao Tsunaga
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7741779A priority Critical patent/JPS561271A/en
Publication of JPS561271A publication Critical patent/JPS561271A/en
Pending legal-status Critical Current

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  • Arc Welding Control (AREA)

Abstract

PURPOSE: To prevent the magnetic deviation of a main transformer by specifying the conduction periods of respectively one set two pieces of alternately actuating switching elements and free wheel diodes of the bridge inverter circuit to which direct current is input and which has a transformer on its load.
CONSTITUTION: The secondary side of a transformer Tr is full-wave rectified by way of a reactor L1 and arc load is connected between its outputs. The switching elements Q1WQ4 of the inverter part repeat the operation of simultaneously turning Q1, Q4 ON, thence turning Q1, Q4 OFF thence simultaneously turning Q2, Q3 ON at a certain frequency. The operations of these elements are the same and from the beginning of the half period when the element Q1 is to be intrinsically conducted, they are put in a ready state. The time when there is no more forward voltage drop of the diode D1 is detected and a time delay circuit and switch SW are operated to conduct Q1. In this way, the conduction time of each element is unified and the unbalance of the periods when the diodes D1, D4 and D2, D3 conduct is eliminated, whereby the magnetic deviation of the transformer is prevented.
COPYRIGHT: (C)1981,JPO&Japio
JP7741779A 1979-06-18 1979-06-18 Direct current welding electric power source device Pending JPS561271A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7741779A JPS561271A (en) 1979-06-18 1979-06-18 Direct current welding electric power source device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7741779A JPS561271A (en) 1979-06-18 1979-06-18 Direct current welding electric power source device

Publications (1)

Publication Number Publication Date
JPS561271A true JPS561271A (en) 1981-01-08

Family

ID=13633367

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7741779A Pending JPS561271A (en) 1979-06-18 1979-06-18 Direct current welding electric power source device

Country Status (1)

Country Link
JP (1) JPS561271A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS597479A (en) * 1982-07-05 1984-01-14 Daihen Corp Power source for welding

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS597479A (en) * 1982-07-05 1984-01-14 Daihen Corp Power source for welding
JPH0470115B2 (en) * 1982-07-05 1992-11-10 Daihen Corp

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