JPS54128846A - Elevation control system for arc furnace electrode - Google Patents

Elevation control system for arc furnace electrode

Info

Publication number
JPS54128846A
JPS54128846A JP3706578A JP3706578A JPS54128846A JP S54128846 A JPS54128846 A JP S54128846A JP 3706578 A JP3706578 A JP 3706578A JP 3706578 A JP3706578 A JP 3706578A JP S54128846 A JPS54128846 A JP S54128846A
Authority
JP
Japan
Prior art keywords
electrode
signal
current
transformer
control system
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
JP3706578A
Other languages
Japanese (ja)
Inventor
Yukinari Ito
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP3706578A priority Critical patent/JPS54128846A/en
Publication of JPS54128846A publication Critical patent/JPS54128846A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Landscapes

  • Discharge Heating (AREA)

Abstract

PURPOSE: To prevent the damage of a furnace wall by detecting arc current for elevating an electrode quickly when excess current is detected.
CONSTITUTION: A current transformer 9 and a voltage transformer 10 are provided on the secondary side of a furnace transformer 3, and their output signals are converted into DC voltages, which are compared through an adjusting resistor 13. A speed reference signal V1 is taken out from this resistor 13 and compared with a speed return signal V2 for forming a speed control circuit of an electrode 2. Here, in a quick elevation circuit of the electrode, arc current is given to a rectifier 15 through current transformers 9 and 14, and the rectified signal is divided in voltage to be input to an amplifier 17. When an output signal is obtained from the amplifier 17, a field-effect transistor 18 is connected, and a quick elevating signal V3 for the electrode is given to a speed control circuit.
COPYRIGHT: (C)1979,JPO&Japio
JP3706578A 1978-03-30 1978-03-30 Elevation control system for arc furnace electrode Pending JPS54128846A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3706578A JPS54128846A (en) 1978-03-30 1978-03-30 Elevation control system for arc furnace electrode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3706578A JPS54128846A (en) 1978-03-30 1978-03-30 Elevation control system for arc furnace electrode

Publications (1)

Publication Number Publication Date
JPS54128846A true JPS54128846A (en) 1979-10-05

Family

ID=12487140

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3706578A Pending JPS54128846A (en) 1978-03-30 1978-03-30 Elevation control system for arc furnace electrode

Country Status (1)

Country Link
JP (1) JPS54128846A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0254891A (en) * 1988-08-19 1990-02-23 Nkk Corp Current control method of dc arc furnace

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0254891A (en) * 1988-08-19 1990-02-23 Nkk Corp Current control method of dc arc furnace

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