FR2236333A1 - Circuit for controlling current rectifier - in electrically heated furnace, receives state signal from each thyristor in group reducing regulator current with fault - Google Patents

Circuit for controlling current rectifier - in electrically heated furnace, receives state signal from each thyristor in group reducing regulator current with fault

Info

Publication number
FR2236333A1
FR2236333A1 FR7423172A FR7423172A FR2236333A1 FR 2236333 A1 FR2236333 A1 FR 2236333A1 FR 7423172 A FR7423172 A FR 7423172A FR 7423172 A FR7423172 A FR 7423172A FR 2236333 A1 FR2236333 A1 FR 2236333A1
Authority
FR
France
Prior art keywords
circuit
current
fault
electrically heated
thyristor
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.)
Withdrawn
Application number
FR7423172A
Other languages
French (fr)
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.)
Siemens AG
Original Assignee
Siemens AG
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
Priority claimed from DE2334081A external-priority patent/DE2334081B1/en
Priority claimed from DE2424825A external-priority patent/DE2424825A1/en
Application filed by Siemens AG filed Critical Siemens AG
Publication of FR2236333A1 publication Critical patent/FR2236333A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M7/155—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M7/1555—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with control circuit
    • H02M7/1557—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with control circuit with automatic control of the output voltage or current
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/40—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices
    • G05F1/44—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Rectifiers (AREA)
  • Control Of Voltage And Current In General (AREA)
  • Power Conversion In General (AREA)

Abstract

The circuit for the current rectifier of an electrically heated furnace has a current regulator preceding the control circuit. The control circuit receives a demand and an actual signal which are compared and the error used to adjust the load. In the event of one or more of the thyristors from a group dropping out of circuit, then a signal representing the operational conditions is derived and transmitted to the regulator. A fault would cause the current regulator preceding the control circuit to produce a reduction in the value of the desired current.
FR7423172A 1973-07-04 1974-07-03 Circuit for controlling current rectifier - in electrically heated furnace, receives state signal from each thyristor in group reducing regulator current with fault Withdrawn FR2236333A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2334081A DE2334081B1 (en) 1973-07-04 1973-07-04 Circuit arrangement for the converter operation of an electric heat generator
DE2424825A DE2424825A1 (en) 1974-05-22 1974-05-22 CIRCUIT ARRANGEMENT FOR POWER CONVERTER OPERATION OF AN ELECTRIC HEATER

Publications (1)

Publication Number Publication Date
FR2236333A1 true FR2236333A1 (en) 1975-01-31

Family

ID=25765431

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7423172A Withdrawn FR2236333A1 (en) 1973-07-04 1974-07-03 Circuit for controlling current rectifier - in electrically heated furnace, receives state signal from each thyristor in group reducing regulator current with fault

Country Status (4)

Country Link
AT (1) AT326378B (en)
FR (1) FR2236333A1 (en)
IT (1) IT1015611B (en)
NL (1) NL7409064A (en)

Also Published As

Publication number Publication date
IT1015611B (en) 1977-05-20
NL7409064A (en) 1975-01-07
AT326378B (en) 1975-12-10
ATA551274A (en) 1975-02-15

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Legal Events

Date Code Title Description
ST Notification of lapse