DE2747449A1 - Forced commutation system for thyristor circuit - operates with mutually coupled inductors inserted into thyristor leads - Google Patents

Forced commutation system for thyristor circuit - operates with mutually coupled inductors inserted into thyristor leads

Info

Publication number
DE2747449A1
DE2747449A1 DE19772747449 DE2747449A DE2747449A1 DE 2747449 A1 DE2747449 A1 DE 2747449A1 DE 19772747449 DE19772747449 DE 19772747449 DE 2747449 A DE2747449 A DE 2747449A DE 2747449 A1 DE2747449 A1 DE 2747449A1
Authority
DE
Germany
Prior art keywords
thyristor
circuit
leads
mutually coupled
operates
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Withdrawn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
DE19772747449
Other languages
German (de)
Inventor
Martti Dipl Ing Harmoinen
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.)
ABB Stromberg Oy
Original Assignee
Stromberg Oy AB
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 Stromberg Oy AB filed Critical Stromberg Oy AB
Publication of DE2747449A1 publication Critical patent/DE2747449A1/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Withdrawn legal-status Critical Current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
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/505—Conversion of dc power input into ac 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
    • H02M7/515—Conversion of dc power input into ac 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
    • H02M7/5152—Conversion of dc power input into ac 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 separate extinguishing means
    • H02M7/5155—Conversion of dc power input into ac 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 separate extinguishing means wherein each commutation element has its own extinguishing means
    • 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
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/4811—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode having auxiliary actively switched resonant commutation circuits connected to intermediate DC voltage or between two push-pull branches

Abstract

The normally separate inductors in the main thyristor (Tp) leads and in the common lead to the commutating thyristors (Ta) are combined into two mutually coupled inductors (L1, L2). By means of this mutual coupling the effect of the separate inductor in the commutating thyristor connection is synthesised. The mutual coupling can be adjusted to the desired value for correct commutation by altering the size, and for fine setting the spacing between, the two inductor coils (L1, L2). This form of construction reduces the bulk of the whole assembly and makes possible the manufacture of small compact inverters.

Description

Schaltung für Thyri storen-ZwangskomnutieNngskreiseCircuit for thyristor forced communication circuits

Gegenstand der Erfindung ist eine Schaltung für Zwangskommutierungskreisen von Thvristoren, mit wenigstens drei verschiedenen Schlingen mit einer induktiven Reaktanz. The invention relates to a circuit for forced commutation circuits of thyristors, with at least three different loops with an inductive one Reactance.

In zwangskommutierten Thyristorschaltungen geschieht die Löschung im allgemeinen mittels eines aus einem sog. Komnuti erunRskondencator und einer KoTmutiertungsdrossel geformten LC-Kreises. So ist z.B. der Fall in der bekannten Schaltung gemass der Figur 1. In dieser Schaltung ist zwischen den Glsichspannungseingangspolen ein Gleichstromfilterschalter eingeschaltet, welcher als Zwischenlager für Energie dient und wodurch auch der Komnutierungsstrom fliesst. Parallel mit dem Kondensator C ist eine Rsihenschaltung von zwei Kommutierungskondensatoren CkI singeschaltet. In den Komnutierungskondensatoren Ck wird die zur Löschung der Thyristoren bHnotigtH Kommutierungsenergie geladen. Der Verbindungspunkt dieser Kommutierungskondensatoren Ck ist mittels einer Kommutierungsdrossel Lk einem aus zwei Hauptthyristoren Tp, zwei Hilfsthyristoren TA und zwei O-Dioden fl gabildeten Ausgangskreis, angeordnet. The deletion takes place in forcibly commutated thyristor circuits generally by means of a so-called communication condenser and a Mutating throttle shaped LC circle. For example, this is the case in the well-known Circuit according to FIG. 1. In this circuit there is between the DC voltage input poles a DC filter switch switched on, which acts as an intermediate storage facility for energy serves and through which the communication flow also flows. In parallel with the capacitor C is a series connection of two commutation capacitors CkI. In the communication capacitors Ck, the bHnotigtH to extinguish the thyristors Commutation energy charged. The connection point of these commutation capacitors Ck is one of two main thyristors Tp by means of a commutation reactor Lk, two auxiliary thyristors TA and two O-diodes fl output circuit arranged.

Eine Schaltung gemäss der Figur 1 kann als solche nicht in der Praxis angewendt werden, sondern die Karmutierungsdrossel soll, um die di/dt- und dv/dt-Wsrte der Thyristoren zu begrenzen, in drei Teile, Lkf Lk2 und Lk3 (Figur 2) aufgeteilt werden. Bei Hochleistungsschaltungen sind diese, was den Typeffekt anbetrifft, annähernd gleich gross. A circuit according to FIG. 1 cannot be used as such in practice should be used, but the carbutation throttle should be used to set the di / dt and dv / dt words the thyristors limit, divided into three parts, Lkf Lk2 and Lk3 (Figure 2) will. In the case of high-performance circuits, these are approximate as far as the type effect is concerned same size.

Die Induktivität der Kommutierungsdrosseln wechselt im allgemeinen von einem Mikrohenry bis auf einige hundert Mikrohenry, weshalb diese vorteilhaft mit einem Luftkern versehen werden. Hierbei entsteht das Problem, die mit einem Luftkern versehenen Drosseln so unterzubringen, dass dersn Felder einander nicht beeinflussen, im allgemeinen weit genug von einander entfernt. Hieraus folgt, dass die Kommutierungsdrosseln der Konstruktion eines kleinen und günstigen Inverter im Wege stehen. The inductance of the commutating reactors generally changes from one microhenry to a few hundred microhenry, which is why these are advantageous be provided with an air core. This creates the problem that with a Air-core chokes are to be accommodated in such a way that the fields do not overlap affect, generally far enough apart. It follows that the commutation reactors of the construction of a small and cheap inverter stand in the way.

Dieser Erfindung liegt die Aufgabe zugrunde, den obenerwähnten Nachteil zu beseitigen und eine praktischere Kommutierungsschaltung als bisher zu erzielen. Die Erfindung basiert auf die Erkenntnis, dass die Funktion der Schaltung gemäss der Figur 2 durch eine Drossel, der mit zwei Wicklungen und zwischen diesen einer gewissen magnetischen Schaltung versehen ist, realisiert werden kann. This invention is based on the above mentioned disadvantage to eliminate and to achieve a more practical commutation circuit than before. The invention is based on the knowledge that the function of the circuit according to of Figure 2 by a choke with two windings and one between them certain magnetic circuit is provided, can be realized.

Genauer ausgedrückt ist für die erfindungsgemässe Schaltung hauptsächlich kennzeichnend, dass an zwei Schlingen je eine Wicklung so geschaltet ist, dass deren Gegeninduktivität eine induktive Reaktanz in den anderen Schlingen anregt, die wenigstens von gleicher Grössenordnung ist wie die Induktivität der beiden Wicklungen. To put it more precisely, is mainly for the circuit according to the invention characterizing that a winding is connected to two loops so that their Mutual inductance excites an inductive reactance in the other loops at least is of the same order of magnitude as the inductance of the two windings.

Kennzeichnend für eine spezielle Ausführungsform der erfindungsgemässen Schaltung ist, dass beide Wicklungen als eine Drossel mit Doppelwicklung aufgebaut sind. Characteristic of a special embodiment of the invention The circuit is that both windings are constructed as a choke with double winding are.

Die Erfidnung wird unten im Einzelnen anhand der in der beigelegten Zeichnung dargestellten Ausführungsformen näher betrachtet. Die Figur 3 stellt in Diagrammform eine erfindungsgemässes Schaltung dar. The invention is detailed below based on that in the enclosed Embodiments shown in the drawing considered in more detail. Figure 3 represents in Diagram shows a circuit according to the invention.

Die Figur 4 stellt den praktischen Aufbau einer in der erfindungsgemessen Schaltung angewandten Drossel dar. FIG. 4 shows the practical structure of one in accordance with the invention Circuit applied choke.

Wie aus der Figur 3 hervorgeht, ist der Virbindungspunkt des Komutierungskondensators Ck mit dem Verbindungspunkt der Hilfsthyristoren TA kurzgeschlossen, wogegen die Gleichspannungseingangspolen dem Hauptthyristorkreis mittels der Drossel L1 bzw. L2 angeschlossen sind. As can be seen from FIG. 3, the connection point is the commutation capacitor Ck short-circuited to the connection point of the auxiliary thyristors TA, whereas the DC voltage input poles to the main thyristor circuit by means of choke L1 resp. L2 are connected.

Die Bemessung der Drossel gemäss der Figur 3 in der Schaltung gemäss der Figur 2 erfolgt in folgender Weise: L1 = Lkl + Lk3 L2 = Lk2 + Lk3 M = L1 + L2 - [Lk1 + Lk2] 2 wo M die Gegeninduktivität der Wicklungen 1 und 2 bedeutet. The dimensioning of the throttle according to FIG. 3 in the circuit according to FIG 2 takes place in the following way: L1 = Lkl + Lk3 L2 = Lk2 + Lk3 M = L1 + L2 - [Lk1 + Lk2] 2 where M is the mutual inductance of windings 1 and 2.

Mit dieser Bemessung funktioniert die Schaltung gemäss der Figur 3 in derselben Weise wie die Schaltung gemäß der Figur 2. With this dimensioning, the circuit works according to the figure 3 in the same way as the circuit according to FIG.

Ein erfindungsgemässer Drossel wird mechanisch z.B. gemäss der Figur 4 aufgebaut. Uort bildet die Wicklung eine induktivität L1 und die Wicklung 2 eine Induktivität L2. Durch änderung des Abstandes zwischen den Wicklungen wird die erwünschte Gegeninduktivität M erzielt. A throttle according to the invention is mechanically e.g. according to the figure 4 built. The winding forms an inductance L1 and the winding 2 forms an inductance Inductance L2. By changing the distance between the windings, the desired Mutual inductance M achieved.

Für die verschiedenen Kcrrponenten der Schaltungen können z.B. Werte folgender Grössenordnung gewählt werden. For the various components of the circuits, e.g. values of the following order of magnitude.

Lk1, Lk2, Lk3 10µH L1, L2 20µH CK 50 P F C 2mF Die Strom- und Spannungsgebiete der Thyristoren Tp, TA und der Dioden D sind vorteilhaft 25...1000 A bzw. 600...2000 V. Lk1, Lk2, Lk3 10µH L1, L2 20µH CK 50 P F C 2mF The current and voltage areas the thyristors Tp, TA and the diodes D are advantageously 25 ... 1000 A or 600 ... 2000 V.

Die Erholungszeit der Thyristoren Tp, TA ist 20.. .50 µs. The recovery time of the thyristors Tp, TA is 20 .. .50 µs.

L e e r s e i t eL e r s e i t e

Claims (2)

Patentansprüche: 1. Schaltung für Zwangskommutierungskreisen von Thyristoren A), mit wenigstens drei verschiedenen Schlingen (1, 2, 3) mit einer induktiven Reaktanz, dadurch g e k e n n z e i c h n e t, dass an zwei Schlingen (z.B. 1 und 2) je eine Wicklung (L1 und L2) so geschaltet ist, dass deren Gegeninduktivität (M) eine induktive Reaktanz in den anderen Schlingen (z.B. 3) anregt, die wenigstens von gleicher Grössenordnung ist winde Induktivität (Figur 3) der beiden Wicklungen (L1 und L2). Claims: 1. Circuit for forced commutation circuits from Thyristors A), with at least three different loops (1, 2, 3) with one inductive reactance, as a result of which it is attached to two loops (e.g. 1 and 2) each winding (L1 and L2) is switched in such a way that their mutual inductance (M) stimulates an inductive reactance in the other loops (e.g. 3) which is at least The inductance (FIG. 3) of the two windings is of the same order of magnitude (L1 and L2). 2. Schaltung gemäss Patentanspruch 1, dadurch g e k n n n -z a i c h n e t, dass beide Wicklungen (L1 und L2) als eine Drossel mit koppelwicklung aufgebaut sind. 2. Circuit according to claim 1, thereby g e k n n n -z a i c h n e t that both windings (L1 and L2) as a choke with coupling winding are constructed.
DE19772747449 1976-10-22 1977-10-21 Forced commutation system for thyristor circuit - operates with mutually coupled inductors inserted into thyristor leads Withdrawn DE2747449A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI763019A FI763019A (en) 1976-10-22 1976-10-22 KOPPLING VID TVAONGSKOMMUTERINGSKRETSAR FOER TYRISTORER

Publications (1)

Publication Number Publication Date
DE2747449A1 true DE2747449A1 (en) 1978-04-27

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ID=8510363

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Application Number Title Priority Date Filing Date
DE19772747449 Withdrawn DE2747449A1 (en) 1976-10-22 1977-10-21 Forced commutation system for thyristor circuit - operates with mutually coupled inductors inserted into thyristor leads

Country Status (3)

Country Link
DE (1) DE2747449A1 (en)
FI (1) FI763019A (en)
SE (1) SE7711713L (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0012648A1 (en) * 1978-12-08 1980-06-25 Westinghouse Electric Corporation Single-pole commutation circuit
US4334265A (en) * 1979-01-19 1982-06-08 Asea Aktiebolag Thyristor inverter with inverter bridge and common turn-off circuit for inverter thyristors
US5243476A (en) * 1991-04-13 1993-09-07 Samsung Electronics Co., Ltd. Method of establishing the copying speed of a double-deck vcr

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0012648A1 (en) * 1978-12-08 1980-06-25 Westinghouse Electric Corporation Single-pole commutation circuit
US4334265A (en) * 1979-01-19 1982-06-08 Asea Aktiebolag Thyristor inverter with inverter bridge and common turn-off circuit for inverter thyristors
US5243476A (en) * 1991-04-13 1993-09-07 Samsung Electronics Co., Ltd. Method of establishing the copying speed of a double-deck vcr

Also Published As

Publication number Publication date
SE7711713L (en) 1978-04-23
FI763019A (en) 1978-04-23

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8141 Disposal/no request for examination