GB1096790A - Electrode position control device for electrode furnaces - Google Patents
Electrode position control device for electrode furnacesInfo
- Publication number
- GB1096790A GB1096790A GB18018/65A GB1801865A GB1096790A GB 1096790 A GB1096790 A GB 1096790A GB 18018/65 A GB18018/65 A GB 18018/65A GB 1801865 A GB1801865 A GB 1801865A GB 1096790 A GB1096790 A GB 1096790A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplifier
- electrode
- integrating device
- electrodes
- inoperative
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B7/00—Heating by electric discharge
- H05B7/02—Details
- H05B7/10—Mountings, supports, terminals or arrangements for feeding or guiding electrodes
- H05B7/109—Feeding arrangements
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B7/00—Heating by electric discharge
- H05B7/02—Details
- H05B7/144—Power supplies specially adapted for heating by electric discharge; Automatic control of power, e.g. by positioning of electrodes
- H05B7/148—Automatic control of power
-
- 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
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Power Engineering (AREA)
- Feedback Control In General (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Coloring (AREA)
Abstract
1,096,790. Automatic control of electrode furnaces. ALLMANNA SVENSKA ELEKTRISKA A.B. April 29, 1965 [April 30, 1964], No. 18018/65. Heading G3R. A system for automatically controlling the position of the electrodes of a furnace includes an integrating device which is rendered inoperative during the periods whilst the electrodes are being moved, the use of an integrating device ensuring against unnecessary control of the electrode positions. A signal proportional to electrode current is compared with a reference value and the resulting signal is fed to an amplifier over a phase sensitive blocking device which introduces a dead band into the control. The signal fed to the amplifier is integrated by a device comprising resistors and capacitors. When the integrated voltage reaches a value set by a limiting device connected to the output of the amplifier one or other of two complementary transistors is rendered conductive thereby disabling the integrating device with the result that the amplifier instantaneously reaches maximum output. The output of the amplifier, by way of a second pair of complementary transistors, energizes one or other of a pair of relays which are operative to move the electrodes up or down to restore the electrode current to the normal value. The relays have contacts which short circuit the blocking device connected to the amplifier input and further contacts which cause a further relay to render the integrating device inoperative. The further relay also renders the integrating device inoperative when adjustment of the system is made.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE5397/64A SE311052B (en) | 1964-04-30 | 1964-04-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1096790A true GB1096790A (en) | 1967-12-29 |
Family
ID=20266383
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18018/65A Expired GB1096790A (en) | 1964-04-30 | 1965-04-29 | Electrode position control device for electrode furnaces |
Country Status (4)
Country | Link |
---|---|
FR (1) | FR1433755A (en) |
GB (1) | GB1096790A (en) |
NO (1) | NO122266B (en) |
SE (1) | SE311052B (en) |
-
1964
- 1964-04-30 SE SE5397/64A patent/SE311052B/xx unknown
-
1965
- 1965-04-26 NO NO157823A patent/NO122266B/no unknown
- 1965-04-28 FR FR14961A patent/FR1433755A/en not_active Expired
- 1965-04-29 GB GB18018/65A patent/GB1096790A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
SE311052B (en) | 1969-05-27 |
FR1433755A (en) | 1966-04-01 |
NO122266B (en) | 1971-06-07 |
DE1565254B2 (en) | 1972-12-07 |
DE1565254A1 (en) | 1970-05-27 |
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