NO116472B - - Google Patents
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- Publication number
- NO116472B NO116472B NO16790667A NO16790667A NO116472B NO 116472 B NO116472 B NO 116472B NO 16790667 A NO16790667 A NO 16790667A NO 16790667 A NO16790667 A NO 16790667A NO 116472 B NO116472 B NO 116472B
- Authority
- NO
- Norway
- Prior art keywords
- voltage
- resistance
- switching
- capacitor
- shunted
- Prior art date
Links
- 239000003990 capacitor Substances 0.000 claims description 11
- 239000004065 semiconductor Substances 0.000 claims description 8
- 230000010363 phase shift Effects 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims 1
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Control Of Electrical Variables (AREA)
- Emergency Protection Circuit Devices (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Description
Anordning til lasteomkobling ved trinntransformatorer ved hjelp av styrbare halvlederlikeretter-apparater. Device for load switching at step transformers using controllable semiconductor rectifier devices.
Der har allerede vært foreslått en anordning til lastomkobling ved trinntransformatorer ved hjelp av styrte halvlederlike-rettere hvor der parallelt med de styrbare halvlederlikeretter-apparafatl-er anordnet styreapparater som med sine utganger mater det respektive i den annen velgerarm liggende styrbare halvlederlikeretter-apparat og., takket være anordningen av et RC-ledd parallelt med inngangen., kan fore laststrommen i noen få mikrosekunder under omkoblingen etter null-gjennomgang av strommen uten at der på dem opptrer noen vesentlig spenning sammenholdt med trinnspenningen. Denne lille spenning bevirker via en kondensator og en dermed seriekoblet transformator 'allerede tenning av de tilsluttede styrbare halvlederlikeretbere. Den vesentlig hoyere trinnspenning frembringer via kondensatoroverforings-leddet og et dermed parallellkoblet motstandsoverforingsledd bare st-yrestrommer av tilstrekkelig stbrrelse, som adderes på transfon..a-Kfr. kl. 21C-67/01 torens sekundærsider og som folge av sin faseforskyvning gir den nodvendige ubrutte likestrom. De styreapparater soin anvendes i denne forbindelse, og som får sin styrespenning fra den til enhver tid foreliggende trinnspenning på trinntransformatoren, er anvendelige for forskjellig trinnspenning, f.eks. opp til et forhold 1:4. Nu forekommer det imidlertid i praksis, f.eks. ved lokomotivtransforma-torer, at trinnspenningene varierer i enda hoyere forhold, f.eks. 1:7. Blir styrekretsen i slike tilfeller dimensjonert for den minste forekommende trinnspenning, så opptrer der en for hby belastning ved de meget sterkt varierende trinnspenninger, altså f.eks. opp til syv ganger inngangsspenningen. A device has already been proposed for load switching at step transformers using controlled semiconductor rectifiers, where control devices are arranged in parallel with the controllable semiconductor rectifier apparatus which, with their outputs, feed the respective controllable semiconductor rectifier device located in the other selector arm and., thanks to the arrangement of an RC link in parallel with the input., can carry the load current for a few microseconds during the switching after zero crossing of the current without any significant voltage appearing on them compared to the step voltage. This small voltage causes the connected controllable semiconductor rectifiers via a capacitor and a series-connected transformer to already be ignited. The significantly higher step voltage produces via the capacitor transfer link and a parallel-connected resistance transfer link only control currents of sufficient strength, which are added to the transformer..a-Kfr. at 21C-67/01 the secondary sides of the tor and, as a result of its phase shift, it provides the necessary uninterrupted direct current. The control devices used in this connection, which get their control voltage from the step voltage present at any time on the step transformer, are applicable for different step voltages, e.g. up to a ratio of 1:4. However, it now occurs in practice, e.g. with locomotive transformers, that the step voltages vary in even higher proportions, e.g. 1:7. In such cases, if the control circuit is dimensioned for the smallest occurring step voltage, then too high a load occurs with the very strongly varying step voltages, i.e. e.g. up to seven times the input voltage.
Oppfinnelsens oppgave er å angi en losning hvorved styreapparater av .vedkommende art også kan gjores anvendelige ved to forskjellige spenningsområder, f.eks. 1:4 og 1:7, og det særlig slik The task of the invention is to provide a solution whereby control devices of the relevant kind can also be made applicable at two different voltage ranges, e.g. 1:4 and 1:7, and especially so
at omkoblingen fra det ene spenningsområde til det annet skjer automatisk that the switching from one voltage range to the other occurs automatically
Ifblge oppfinnelsen blir dette oppnådd ved hjelp av en forkoblingsmotstand som er innkoblet foran styreapparatene og består av en koblingskontakt som ligger 1 ledningsføringen for styreapparatets tilslutningsledninger og er innkoblet i diagonalen i en Gratzbro, og som er shuntet med en motstand og påvirkes av et relé beliggende mellom de to trinnvelgerarmer, samt av en kondensator som er tilsluttet Gratzbroens likespenningsutgang og shuntet med en motstand. According to the invention, this is achieved by means of a ballast resistor which is connected in front of the control devices and consists of a switching contact which is located in the wiring for the control device's connection cables and is connected diagonally in a Gratzbro, and which is shunted with a resistance and is affected by a relay located between the two step selector arms, as well as by a capacitor which is connected to Gratzbroen's direct voltage output and shunted with a resistor.
Oppfinnelsen vil bli belyst nærmere under henvisningThe invention will be explained in more detail under reference
til tegningen.to the drawing.
Fig. 1 viser oppbygningen fra forkoblingsapparatetFig. 1 shows the structure of the ballast
samt dettes sammenkobling med stjTeapparatet.as well as its connection with the control device.
Fig. 2 viser hvorledes det relé som påvirker forkoblings-apparatets koblingskontakt, er innkoblet mellom de to velgerarmer. Fig. 2 shows how the relay that affects the ballast's switching contact is connected between the two selector arms.
På fig. 1 er der ved 1 antydet et styreapparat utfortIn fig. 1, a control device is indicated by 1
i henhold til det ovennevnte eldre forslag. 11 og 12 er styreapparatets inngangsklemrner. 2 betegner et forkoblingsapparat som er anordnet i samsvar med oppfinnelsen, og som ligger i serie med styreapparatet 1 og folgelig er tilsluttet dels styreapparatets inn-gangs kl emme 11 og dels klemmen 13. Forkobllngsapparatet består av en koblingskontakt 22 som ligger i ledningslopet for inngangsledningen. og samtidig i diagonalen av en Gratzbro 23. Koblingskontakten 22 er shuntet! med en motstand 21. Til Gratzbroens likespenningsutgang er der koblet en kondensator 24, som igjen er shuntet med en motstand 25. Koblingskontakten 22 styres av et relé 5 (jfr. fig. 2) innkoblet i en ledning j according to the above older proposal. 11 and 12 are the control unit's input terminals. 2 denotes a ballast device which is arranged in accordance with the invention, and which is in series with the control device 1 and is consequently connected partly to the control device's input terminal 11 and partly to terminal 13. The ballast device consists of a coupling contact 22 which is located in the cable loop for the input cable. and at the same time in the diagonal of a Gratzbro 23. The coupling contact 22 is shunted! with a resistor 21. A capacitor 24 is connected to the Gratzbroen's DC output, which in turn is shunted with a resistor 25. The switching contact 22 is controlled by a relay 5 (cf. Fig. 2) connected in a wire j
som forbinder en av de to velgerarmer 41, 42, som kan kobles langs faste uttakskontakter, f.eks. 31, 32, på en trinnvikling 3-which connects one of the two selector arms 41, 42, which can be connected along fixed outlet contacts, e.g. 31, 32, on a step winding 3-
Anordningen arbeider på folgende måte: Ved små trånn-spenninger er relékontakten 22 sluttet, da reléet3ikke er magnetisert. Dermed ligger hele spenningen på styreapparatet 1. Når trinnspenningen når en bestemt storre hoyde, blir reléet 5 magnetisert og åpner dermed koblingskontakten 22. Motstanden 21 panner nu for styreapparatet en seriemotstand som reduserer spenningen over styreapparatet til en passende verdi. Denne nedsettelse av spenningen er onskelig i stasjoner tilstand. Nu oker imidlertid forkoblingsmotstanden 21 styreapparatets reaksjonstid på ugunstig måte når der legges spenning til klemmene 13, 12. Por å unngå denne uheldige virkning er motstanden 21 shuntet med en kondensator 24 i parallellkobling med en forholdsvis stor motstand 25. Men da nettopp kondensatoren 24 ville bevirke sveising av koblingskontakten 22 ved slutningen, er en direkte shuntin.5 av motstanden 21 ikke tilrådelig, og kondensatoren 24 er derfor tilsluttet likespennings-utgangen fra Gratzbroen 23. Dermed kan kondensatoren kortvarig virke til å shunte motstanden, men kan ikke lenger lade seg ut over relékontakten 22 på farlig måte. The device works in the following way: At low voltages, the relay contact 22 is closed, as the relay 3 is not magnetized. Thus, the entire voltage is on the control device 1. When the step voltage reaches a certain greater height, the relay 5 is magnetized and thus opens the switching contact 22. The resistor 21 now creates a series resistance for the control device which reduces the voltage across the control device to a suitable value. This lowering of the voltage is undesirable in the drives condition. Now, however, the ballast resistor 21 increases the reaction time of the control device in an unfavorable way when voltage is applied to the terminals 13, 12. To avoid this unfortunate effect, the resistor 21 is shunted with a capacitor 24 in parallel connection with a relatively large resistor 25. But precisely then the capacitor 24 would cause welding of the coupling contact 22 at the end, a direct shunting of the resistor 21 is not advisable, and the capacitor 24 is therefore connected to the direct voltage output of the Gratz bridge 23. Thus, the capacitor can briefly act to shunt the resistance, but can no longer discharge itself over relay contact 22 in a dangerous manner.
Claims (1)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19641271820 DE1271820C2 (en) | 1964-09-19 | 1964-09-19 | ARRANGEMENT FOR SWITCHING THE LOAD FOR STEPPING TRANSFORMERS IN NATURAL ZERO PASSAGE OF THE LOAD CURRENT |
DES0093243 | 1964-09-19 | ||
DES0104400 | 1966-06-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
NO116472B true NO116472B (en) | 1969-03-31 |
Family
ID=27180554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO16790667A NO116472B (en) | 1964-09-19 | 1967-04-27 |
Country Status (9)
Country | Link |
---|---|
BE (2) | BE668266A (en) |
CH (1) | CH435440A (en) |
DE (2) | DE1271820C2 (en) |
DK (1) | DK133645B (en) |
ES (1) | ES342202A1 (en) |
GB (1) | GB1130739A (en) |
NL (7) | NL6512004A (en) |
NO (1) | NO116472B (en) |
SE (2) | SE319232B (en) |
-
0
- NL NL277399D patent/NL277399A/xx unknown
- NL NL136228D patent/NL136228C/xx active
- NL NL273278D patent/NL273278A/xx unknown
- NL NL128998D patent/NL128998C/xx active
- NL NL130274D patent/NL130274C/xx active
-
1964
- 1964-09-19 DE DE19641271820 patent/DE1271820C2/en not_active Expired
-
1965
- 1965-08-12 CH CH1131665A patent/CH435440A/en unknown
- 1965-08-13 BE BE668266D patent/BE668266A/xx unknown
- 1965-09-06 SE SE1159265A patent/SE319232B/xx unknown
- 1965-09-15 NL NL6512004A patent/NL6512004A/xx unknown
-
1966
- 1966-06-23 DE DE19661563356 patent/DE1563356B2/en active Pending
-
1967
- 1967-04-27 NO NO16790667A patent/NO116472B/no unknown
- 1967-05-16 DK DK253767A patent/DK133645B/en unknown
- 1967-05-17 BE BE698600D patent/BE698600A/xx unknown
- 1967-06-09 NL NL6708051A patent/NL6708051A/xx unknown
- 1967-06-22 GB GB2896967A patent/GB1130739A/en not_active Expired
- 1967-06-23 ES ES342202A patent/ES342202A1/en not_active Expired
- 1967-06-26 SE SE9136/67*A patent/SE319553B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
NL6708051A (en) | 1967-12-27 |
NL136228C (en) | |
NL130274C (en) | |
BE698600A (en) | 1967-11-03 |
SE319553B (en) | 1970-01-19 |
DK133645C (en) | 1976-11-08 |
DE1271820C2 (en) | 1973-11-22 |
DE1271820B (en) | 1973-11-22 |
SE319232B (en) | 1970-01-12 |
NL6512004A (en) | 1966-03-21 |
GB1130739A (en) | 1968-10-16 |
NL128998C (en) | |
NL273278A (en) | |
ES342202A1 (en) | 1968-07-16 |
CH435440A (en) | 1967-05-15 |
DE1563356B2 (en) | 1971-12-23 |
DK133645B (en) | 1976-06-21 |
NL277399A (en) | |
DE1563356A1 (en) | 1970-05-27 |
BE668266A (en) | 1965-12-01 |
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