GB2005493A - Circuit arrangement for the protection of two controllable semiconductor rectifiers connected in antiparallel against excessive voltages. - Google Patents

Circuit arrangement for the protection of two controllable semiconductor rectifiers connected in antiparallel against excessive voltages.

Info

Publication number
GB2005493A
GB2005493A GB7839320A GB7839320A GB2005493A GB 2005493 A GB2005493 A GB 2005493A GB 7839320 A GB7839320 A GB 7839320A GB 7839320 A GB7839320 A GB 7839320A GB 2005493 A GB2005493 A GB 2005493A
Authority
GB
United Kingdom
Prior art keywords
antiparallel
protection
circuit arrangement
controllable semiconductor
against excessive
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
GB7839320A
Other versions
GB2005493B (en
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.)
BBC Brown Boveri AG Switzerland
BBC Brown Boveri France SA
Original Assignee
BBC Brown Boveri AG Switzerland
BBC Brown Boveri France SA
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 BBC Brown Boveri AG Switzerland, BBC Brown Boveri France SA filed Critical BBC Brown Boveri AG Switzerland
Publication of GB2005493A publication Critical patent/GB2005493A/en
Application granted granted Critical
Publication of GB2005493B publication Critical patent/GB2005493B/en
Expired 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
    • H03K17/0824—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in thyristor switches

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Protection Of Static Devices (AREA)
  • Arc Welding Control (AREA)

Abstract

Thyristors 3,4 connected in antiparallel are protected from excess applied voltages of either polarity by means having the same breakdown voltage for both polarities. Thus, a bridge 8-12 is connected between the control electrodes 5, 6 with a trigger diode in its direct current path and the arrangement is such that, in the event of an excess applied voltage of either polarity, turn- on current is applied to the control electrode of that thyristor, which is stressed with positive anode voltage, by way of zener breakdown. The circuit is applicable to controlling of the other thyristor current in a welding transformer. A fuse 14 and fault indicator 15 may be included. <IMAGE>
GB7839320A 1977-10-06 1978-10-04 Circiut arrangement for the protection of two controllablesemiconductor rectifiers connected in antiparallel againstexcessive voltages Expired GB2005493B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2744961A DE2744961C2 (en) 1977-10-06 1977-10-06 Surge protection arrangement for the AC power controller of a welding transformer

Publications (2)

Publication Number Publication Date
GB2005493A true GB2005493A (en) 1979-04-19
GB2005493B GB2005493B (en) 1982-04-28

Family

ID=6020810

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7839320A Expired GB2005493B (en) 1977-10-06 1978-10-04 Circiut arrangement for the protection of two controllablesemiconductor rectifiers connected in antiparallel againstexcessive voltages

Country Status (5)

Country Link
CA (1) CA1132656A (en)
CH (1) CH632358A5 (en)
DE (1) DE2744961C2 (en)
GB (1) GB2005493B (en)
SE (1) SE440713B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0071945A1 (en) * 1981-08-12 1983-02-16 Siemens Aktiengesellschaft Ignition circuit for a power thyristor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3311667C2 (en) * 1983-03-30 1986-02-13 Siemens AG, 1000 Berlin und 8000 München Arrangement for the feedback of protective ignitions with two series-connected counter-parallel thyristor pairs

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2258112B2 (en) * 1972-11-28 1978-02-23 Brown, Boveri & Cie Ag, 6800 Mannheim PROTECTIVE CIRCUIT TO PROTECT THYRISTORS AGAINST OVERVOLTAGE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0071945A1 (en) * 1981-08-12 1983-02-16 Siemens Aktiengesellschaft Ignition circuit for a power thyristor

Also Published As

Publication number Publication date
GB2005493B (en) 1982-04-28
SE7810308L (en) 1979-04-07
DE2744961A1 (en) 1979-04-12
CA1132656A (en) 1982-09-28
DE2744961C2 (en) 1985-07-18
CH632358A5 (en) 1982-09-30
SE440713B (en) 1985-08-12

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee