JPS5597877A - Overcurrent protector of direct current arc welding machine - Google Patents

Overcurrent protector of direct current arc welding machine

Info

Publication number
JPS5597877A
JPS5597877A JP671079A JP671079A JPS5597877A JP S5597877 A JPS5597877 A JP S5597877A JP 671079 A JP671079 A JP 671079A JP 671079 A JP671079 A JP 671079A JP S5597877 A JPS5597877 A JP S5597877A
Authority
JP
Japan
Prior art keywords
voltage
capacitor
charging
vpt
vst
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
JP671079A
Other languages
Japanese (ja)
Other versions
JPS6260197B2 (en
Inventor
Hideo Ishii
Haruo Moriguchi
Hirobumi Yoshikawa
Masao Katooka
Kunio Kano
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.)
Sansha Electric Manufacturing Co Ltd
Original Assignee
Sansha Electric Manufacturing 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 Sansha Electric Manufacturing Co Ltd filed Critical Sansha Electric Manufacturing Co Ltd
Priority to JP671079A priority Critical patent/JPS5597877A/en
Publication of JPS5597877A publication Critical patent/JPS5597877A/en
Publication of JPS6260197B2 publication Critical patent/JPS6260197B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Arc Welding Control (AREA)

Abstract

PURPOSE: To protect the DC power supply against abnormal states by providing an arc voltage detecting element, a time constant circuit consisting of a resistance and capacitor, a driving element, a control element, etc. to the captioned protector.
CONSTITUTION: In the captioned overcurrent protector, the charging voltage Vc of a capacitor C changes and the operation level of the 2nd transistor Tr 2 is beforehand determined and the time reaching for this becomes faster as the voltage Vp is higher and longer as it is lower. The voltage Vp contributing to the charging of the capacitor C is taken from the output of an amplifier IC and the voltage at the point P starts charging to the capacitor C as the 1st transistor Tr 1 goes OFF when the output voltage becomes set voltage or less. This charging voltage is converted to the voltages Vpw, Vpt by the voltages Vsw and Vst at the wire shorting. Because of Vsw > Vst, they become Vpw < Vpt and the voltage Vc of the capacitor C reaches the operation level of the transistor Trp. In the case of the voltage Vst, the gate block circuit operation time becomes faster than the operation time of the case of the voltage Vpt, thus safe current is supplied.
COPYRIGHT: (C)1980,JPO&Japio
JP671079A 1979-01-23 1979-01-23 Overcurrent protector of direct current arc welding machine Granted JPS5597877A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP671079A JPS5597877A (en) 1979-01-23 1979-01-23 Overcurrent protector of direct current arc welding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP671079A JPS5597877A (en) 1979-01-23 1979-01-23 Overcurrent protector of direct current arc welding machine

Publications (2)

Publication Number Publication Date
JPS5597877A true JPS5597877A (en) 1980-07-25
JPS6260197B2 JPS6260197B2 (en) 1987-12-15

Family

ID=11645839

Family Applications (1)

Application Number Title Priority Date Filing Date
JP671079A Granted JPS5597877A (en) 1979-01-23 1979-01-23 Overcurrent protector of direct current arc welding machine

Country Status (1)

Country Link
JP (1) JPS5597877A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456813A (en) * 1982-01-08 1984-06-26 Mitsubishi Denki Kabushiki Kaisha Hot wire type arc welding system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456813A (en) * 1982-01-08 1984-06-26 Mitsubishi Denki Kabushiki Kaisha Hot wire type arc welding system

Also Published As

Publication number Publication date
JPS6260197B2 (en) 1987-12-15

Similar Documents

Publication Publication Date Title
CA2050223A1 (en) Overload current protection apparatus
GB2342795B (en) Improvements relating to monitoring apparatus for electrical circuits
JPS5570862A (en) Transfer paper separating device in electronic copier
JPS57212825A (en) Protective device
DE69112801D1 (en) Method and device for charging a battery.
JPS54156296A (en) Controlling method for wire-cut electric discharge machine
JPS576916A (en) Power supply device
JPS56132813A (en) Reset device of integrated circuit
JPS5654530A (en) Voltage abnormality detector
JPS5467655A (en) Distribution line shortage protector
JPS54102923A (en) Driving circiut
JPS54116277A (en) Abnormal voltage detecting circuit
JPS5570475A (en) Ac electric shock preventing device for high resistance
FR2377089A1 (en) AC circuit breaker test unit - has auxiliary voltage source coupled to FET control device
JPS5490549A (en) Dc stabilized power source device
JPS57100520A (en) Memory power supply circuit
JPS56159716A (en) Direct-current electric power device
JPS5781963A (en) Current detecting circuit for dc pulse arc welding machine
JPS5558623A (en) Method for making cr timer of non-power failure and non- power failure timer unit
JPS6412827A (en) Protecting circuit of voltage regulator for charging generator
JPS5497752A (en) Protective circuit for switching regulator
JPS57162362A (en) Measuring method for latchup withstand amount of complementary mos integrated circuit device
JPS57211984A (en) Power source for current transformer coil
JPS5691678A (en) Switching power supply device
JPS5654370A (en) Testing method of semiconductor