US3596168A - Thyristor-triggering arrangement using dual pulse transformers having dissimilar characteristics - Google Patents

Thyristor-triggering arrangement using dual pulse transformers having dissimilar characteristics Download PDF

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Publication number
US3596168A
US3596168A US29541A US3596168DA US3596168A US 3596168 A US3596168 A US 3596168A US 29541 A US29541 A US 29541A US 3596168D A US3596168D A US 3596168DA US 3596168 A US3596168 A US 3596168A
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Prior art keywords
pulse
transforming means
transformer
arrangement according
series
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Expired - Lifetime
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US29541A
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English (en)
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Jurgen Hengsberger
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Licentia Patent Verwaltungs GmbH
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Licentia Patent Verwaltungs GmbH
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    • 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
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region

Definitions

  • Waddell ABSTRACT To promote simultaneous firing of series-connected thyristors, each is controlled by two pulse transformers in series.
  • the first transformer efficiently transmits the initial part of a control pulse having a very steep wave front, and the second transformer efliciently transmits the relatively long body of the pulse.
  • the pulse transformers needed for the transmission of such ignition pulses must be designed with relatively few secondary turns. In order to transmit the pulse length required, they must, however, be of particularly large core cross section. Because of the pulse length required, only ring tape core material with high usable induction can be considered for practical purposes, although for the transmission of the steeply rising leading edge of the pulse a low-loss material, such as ferrite, would be substantially more favorable, which however, has only low usable induction. It is seen that the expenditure of material for such a pulse transformer is considerable and that compromises must be made in the design of the transformer because of the difierent requirements for the transmission of the pulse from and the pulse back.
  • the object of the present invention to create an arrangement for the transmission of a pulse of steep front and long duration that no longer exhibits these disadvantages. Accordingly, the invention is Concerned with an arrangement of a control pulse, especially a pulse of long duration with a nearly vertical wave front, for converters with very many, series-connected, controllable converter valves. It is characterized by associating with each controllable converter valve a first and a second pulse transformer.
  • the first pulse transformer serves for the transmission of the initial pulse peak.
  • the core of the first pulse transformer is therefore made of a material with a loss as low as possible, for instance, ferrite.
  • the second pulse transformer serves for the transmission of the back of the pulse.
  • the core of this transformer is therefore made of a material with high saturation induction.
  • the first pulse transformer has only a low number, and the second pulse transformer a relatively high number of secondary turns.
  • the first pulse transformer can be designed with very low leakage, so that it is also possible to transmit impulses of very fast rise time.
  • the core cross section of the second pulse transformer can be reduced.
  • FIGS. 1 and 2 show example of execution in which the ignition pulses are supplied by a single pulse source.
  • FIG. 3 shows an alternative feature of the invention wherein the transformer cores are premagnetized.
  • a pulse source 9 supplies the control (gate) pulses required for the ignition of these converter valves.
  • the control pulses which are here designed as pulses of long continuous duration with steeply rising leading edges, are fed to the controlled valves 1 and 2 in each case via first and second pulse transformers and 6 which are illustrated symbolically in the drawings.
  • the primary windings 6a and a of all pulse transformers are serially interconnected and are connected with the pulse source 9, whereby these transformers will operate contemporaneously.
  • Preferably single turn 0 front 12a of the control pulse is efficiently transformed primaries are used.
  • the secondary windings 5b and 6b of the pulse transformers which are associated in each case with one converter valve 1 or 2, respectively, are connected in parallel and are isolated from each other by diodes 3 and 4. ln this arrangement, there is only a single pulse source, so that the pulse 12 generated by the source 9 must flow through the primary winding of the first pulse transformer as well as through the primary winding of the second one.
  • the high and fast-rising by the low-loss and low-leakage first pulse transformer 5 to a short duration, high magnitude gate pulse 13:: which is fed to each controlled rectifier valve 1 and 2 respectively, and the pulse back I2! is transformed by the second pulse transformer 6 into a longer lasting but less steeply rising pulse 13b which is fed to the same valves.
  • FIG. 2 shows an arrangement constructed similarly as FIG. 1.
  • the secondary windings 5b and 6b of the pulse transformers associated in each case with a controlled converter valve 1 or 2, respectively are connected not in parallel but in series.
  • a diode 7 In parallel to the secondary winding 6b of the second pulse transformer is connected a diode 7 which has such polarity that the high, fast rising impulse supplied by the secondary winding 5b of the first pulse transformer need not flow through the secondary winding 6b, which consists of many turns, of the second pulse transformer.
  • the arrangements according to FIGS. 1 and 2 are equivalent as to expenditure and operation.
  • the operation of the source 9 would, of course, be synchronized with the alternating voltage power system to which the valves 1 and 2 are coupled.
  • the pulse transformer provided for the transmission of the steep pulse front is constructed of lowloss material and preferably with few secondary turns
  • the pulse transformer provided for the transmission of the pulse back is constructed of core material of high saturation induction and preferably with many secondary turns, in order to achieve a large voltage-time area.
  • premagnetization on the primary side can be used in all circuit variants given.
  • FIG. 3 shows a premagnetizing source 15 connected to a third winding 60 and thereby inductively coupled to the primary winding 6a of one of the pulse transformers 6'.
  • the primary windings of the pulse transformcrscouldbeconductively paralleledbypremagnetizingmeans comprising the series combination of a DC source, a resistor, and a choke.
  • premagnetization is even mandatory.
  • An arrangement according to the invention makes possible a reduction of the expenditure of material in the construction of the transformer of the pulse stage while simultaneously fulfilling the required conditions optimally.
  • control means for substantially simultaneously firing a plurality of series-connected controllable converter valves, the control means including a common source of periodic control pulses of long duration with steeply rising leading edges, wherein the improvement comprises for each valve 1, 2 the combination of:
  • first pulse transforming means 5 having a primary winding 5a conductively connected to said common source 9 and a secondary winding 5b connected to the associated valve for transmitting an initial part of each control pulse to that valve, and
  • second transforming means 6 having a primary winding 6a connected in series with said common source and with the primary winding 5a of said first transforming means so that each of said control pulses must flow through both of said primary'wiridings, said second transforming means having a secondary winding 6b connected to the associated valve and being contemporaneously operative with said first transforming means for transmitting the remainder of each control pulse to the same valve, and said first and second transforming means having appreciably dissimilar characteristics.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
US29541A 1967-01-27 1970-04-17 Thyristor-triggering arrangement using dual pulse transformers having dissimilar characteristics Expired - Lifetime US3596168A (en)

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DEL0055597 1967-01-27

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US (1) US3596168A (enrdf_load_stackoverflow)
FR (1) FR1551690A (enrdf_load_stackoverflow)
SE (1) SE339959B (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3723847A (en) * 1971-07-01 1973-03-27 Comp Generale Electricite Semiconductor system redundant control arrangement
US4028609A (en) * 1975-12-22 1977-06-07 Westinghouse Electric Corporation Digital firing pulse generator with pulse suppression
US4337404A (en) * 1978-12-22 1982-06-29 Asea Aktiebolag Apparatus for firing series-connected thyristors
US4535400A (en) * 1983-09-06 1985-08-13 General Electric Company Means and method for simultaneously triggering series SCR's
EP0338945A1 (fr) * 1988-04-22 1989-10-25 Merlin Gerin Dispositif statique à thyristors pour un réseau alternatif à moyenne tension
US5331234A (en) * 1992-06-12 1994-07-19 The United States Of America As Represented By The United States Department Of Energy Solid state switch
US20090206677A1 (en) * 2008-02-14 2009-08-20 Kulpin John G High voltage switching device
RU2469456C2 (ru) * 2011-02-02 2012-12-10 Открытое акционерное общество "Всероссийский научно-исследовательский проектно-конструкторский и технологический институт релестроения с опытным производством" Устройство для управления последовательно включенными тиристорами

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3038895B1 (fr) 2015-07-17 2017-07-07 Coatex Sas Production de carbonate de calcium precipite

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3723847A (en) * 1971-07-01 1973-03-27 Comp Generale Electricite Semiconductor system redundant control arrangement
US4028609A (en) * 1975-12-22 1977-06-07 Westinghouse Electric Corporation Digital firing pulse generator with pulse suppression
US4337404A (en) * 1978-12-22 1982-06-29 Asea Aktiebolag Apparatus for firing series-connected thyristors
US4535400A (en) * 1983-09-06 1985-08-13 General Electric Company Means and method for simultaneously triggering series SCR's
EP0338945A1 (fr) * 1988-04-22 1989-10-25 Merlin Gerin Dispositif statique à thyristors pour un réseau alternatif à moyenne tension
FR2630597A1 (fr) * 1988-04-22 1989-10-27 Merlin Gerin Dispositif statique a thyristors notamment contacteur, gradateur ou disjoncteur, pour un reseau alternatif a moyenne tension
US5331234A (en) * 1992-06-12 1994-07-19 The United States Of America As Represented By The United States Department Of Energy Solid state switch
US20090206677A1 (en) * 2008-02-14 2009-08-20 Kulpin John G High voltage switching device
RU2469456C2 (ru) * 2011-02-02 2012-12-10 Открытое акционерное общество "Всероссийский научно-исследовательский проектно-конструкторский и технологический институт релестроения с опытным производством" Устройство для управления последовательно включенными тиристорами

Also Published As

Publication number Publication date
SE339959B (enrdf_load_stackoverflow) 1971-11-01
FR1551690A (enrdf_load_stackoverflow) 1968-12-27

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