DE1091219B - Self-excited inverter, containing non-linear amplifier elements arranged in a push-pull circuit - Google Patents
Self-excited inverter, containing non-linear amplifier elements arranged in a push-pull circuitInfo
- Publication number
- DE1091219B DE1091219B DEL33383A DEL0033383A DE1091219B DE 1091219 B DE1091219 B DE 1091219B DE L33383 A DEL33383 A DE L33383A DE L0033383 A DEL0033383 A DE L0033383A DE 1091219 B DE1091219 B DE 1091219B
- Authority
- DE
- Germany
- Prior art keywords
- self
- push
- excited inverter
- pull circuit
- linear amplifier
- 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.)
- Pending
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
- H02M7/53—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 triode or transistor type requiring continuous application of a control signal
- H02M7/537—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 triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5383—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 triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a self-oscillating arrangement
- H02M7/53832—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 triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a self-oscillating arrangement in a push-pull arrangement
- H02M7/53835—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 triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a self-oscillating arrangement in a push-pull arrangement of the parallel type
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Description
DEUTSCHESGERMAN
Wechselrichter werden eingesetzt, um aus einer Gleichspannung, beispielsweise Batterie, eine Wechselspannung zu erzeugen, die dann gegebenenfalls durch weitere Gleichrichter wieder in eine sozusagen transformierte Gleichspannung umgeformt wird. Vorwiegend in Anordnungen, bei denen es auf keine große Frequenzgenauigkeit und Stabilität ankommt, hat sich der selbsterregte Wechselrichter wegen seiner Kurzschlußfestigkeit bewährt. Beim selbsterregten Wechselrichter liegt eine Rückkopplungsschaltung vor, bei der die Ausgangswechselspannung über zeitverzögernde Schaltelemente, beispielsweise Rückkopplungswicklungen, auf den Eingang von nichtlinearen Verstärkerelementen gegeben wird Als Verstärkerelemente kommen sowohl mechanische Kontakte als auch elekironische Schalter, wie Röhren oder Transistoren in Frage.Inverters are used to convert a direct voltage, for example a battery, an alternating voltage to generate, which then, if necessary, transformed back into one, so to speak, by further rectifiers DC voltage is converted. Predominantly in arrangements where there is no large one Frequency accuracy and stability matter, the self-excited inverter has because of its short-circuit resistance proven. The self-excited inverter has a feedback circuit in which the output alternating voltage via time-delaying switching elements, for example feedback windings, given to the input of non-linear amplifier elements come as amplifier elements both mechanical contacts and electronic switches, such as tubes or transistors in Question.
Um das Anschwingen des selbsterregten Wechselrichters zu ermöglichen, waren bisher sogenannte Starthilfen erforderlich. Eine entsprechende bekannte Schaltungsanordnung zeigt Fig. 1. Dort soll die von der Batterie 1 gelieferte Gleichspannung in eine an der Ausgangswicklung 2 a des Wechselrichtertransfo>rmators 2 abgenommenen Wechselspannung umgeformt werden. Die Primärwicklung 2 b dieses Transformators wird abwechselnd von den als Schalter dienenden pnp-Flächentransistoren 3 und 4 mit der Gleichspannung beaufschlagt. Um den Transistoren die Funktion von Schaltern geben zu können, ist am Wechselrichtertransformator 2 die Rückkopplungswicklung 2 c vorgesehen, die die abwechselnde Steuerung des jeweiligen Emitterbasiskreises bewirkt. Wegen der Symmetrie der Wechselrichteranordnung kann jedoch der vorgenannte Steuerungsvorgang im genügenden Maße erst einsetzen, wenn nach Einlegen des Schalters 11 eine zusätzliche Unsymmetrie mit Hilfe des Kondensators 12 hervorgerufen wird. Es wird so erreicht, daß die Gleichspannung erst an einer Primärwicklungshälfte liegt und an der anderen Primärwicklungshälfte infolge der Gegenspannungsbildung eine Span- nung umgekehrter Polarität entsteht, die zur sofortigen Aussteuerung des Transistors 4 führt.So-called starting aids were previously required to enable the self-excited inverter to start oscillating. A corresponding known circuit arrangement is shown in FIG. 1. There, the direct voltage supplied by the battery 1 is to be converted into an alternating voltage taken from the output winding 2 a of the inverter transformer 2. The primary winding 2 b of this transformer is alternately acted upon by the pnp junction transistors 3 and 4 serving as switches with the direct voltage. In order to provide the transistors, the function of switches, c is provided at the inverter transformer 2, the feedback coil 2, which causes the alternating control of the respective emitter-base circuit. Because of the symmetry of the inverter arrangement, however, the aforementioned control process can only start to a sufficient extent when an additional asymmetry is produced with the aid of the capacitor 12 after the switch 11 has been inserted. It is achieved in this way that the direct voltage is only applied to one primary winding half and a voltage of opposite polarity arises on the other primary winding half as a result of the formation of the counter voltage, which leads to the transistor 4 being activated immediately.
Kommt die vorbeschriebene Schaltungsanordnung für die Umwandlung größerer Leistungen in Frage,
so machen sich die Induktivitäten der Transformatorwicklungen durch Überspannungserzeugung beim Umschalten
besonders bemerkbar. Es ist daher zweckmäßig, Schutzeinrichtungen vorzusehen, die bereits
von mit mechanischen Kontakten arbeitenden Wechselrichtern her bekannt sind. Das entsprechende Ausführungsbeispiel
ist in Fig. 2 dargestellt. Es entspricht im wesentlichen der Fig. 1, jedoch ist einmal der Startkondensator
12 weggelassen, und zum anderen sind zur Überspannungsbegrenzung Trockengleichrichter-Selbsterregter
Wechselrichter,
enthaltend in Gegentaktschaltung
angeordnete nichtlineare Verstärkerelemente If the circuit arrangement described above is suitable for converting larger powers, the inductances of the transformer windings are particularly noticeable due to the generation of overvoltage when switching. It is therefore advisable to provide protective devices that are already known from inverters working with mechanical contacts. The corresponding embodiment is shown in FIG. It essentially corresponds to FIG. 1, but on the one hand the starting capacitor 12 is omitted, and on the other hand, dry rectifier self-excited inverters are used to limit overvoltage.
contained in push-pull circuit
arranged non-linear amplifier elements
Anmelder:Applicant:
LICENTIA Patent-Verwaltungs-G.m.b.H., Frankfurt/M., Theodor-Stern-Kai 1LICENTIA Patent-Verwaltungs-G.m.b.H., Frankfurt / M., Theodor-Stern-Kai 1
Dipl.-Ing. Friedrich Ludwig, Berlin-Hermsdorf,
ist als Erfinder genannt wordenDipl.-Ing. Friedrich Ludwig, Berlin-Hermsdorf,
has been named as the inventor
ventile 5 und 8 in Verbindung mit Kondensatoren 6 und 9 vorgesehen. Als Entladewiderstände für die Kondensatoren dienen die ohmschen Widerstände 7 und 10.valves 5 and 8 in connection with capacitors 6 and 9 are provided. As discharge resistors for the Capacitors are used by the ohmic resistors 7 and 10.
Die Erfindung bezieht sich nun auf einen selbsterregten Wechselrichter, enthaltend nichtlineare Verstärkerelemente, wie pnp-Flächentransistoren, denen zur Vermeidung von Überspannungen kapazitive Scheinwiderstände parallel geschaltet sind. Um nun auch bei einem solchen Wechselrichter ohne zusätzliche Starthilfe auskommen zu können, so daß also der Kondensator 12 der Fig. 1 erspart bleiben kann, sind erfindungsgemäß die Kapazitäten je Zweig der Gegentaktschaltung unterschiedlich bemessen. Es genügt, einen Kondensator der i?C-Glieder um etwa 20:0/o kleiner zu machen als den anderen. Die Einwirkung auf die Sperrspannungsspitze der Transistoren ist dann noch nicht erheblich.The invention now relates to a self-excited inverter containing non-linear amplifier elements, such as pnp junction transistors, to which capacitive apparent resistances are connected in parallel to avoid overvoltages. In order to be able to get along with such an inverter without additional starting aid, so that the capacitor 12 of FIG. 1 can be saved, the capacitances per branch of the push-pull circuit are dimensioned differently according to the invention. It is sufficient to make one capacitor of the i? C elements about 20 : 0 / o smaller than the other. The effect on the reverse voltage peak of the transistors is then not yet significant.
Abschließend sei darauf hingewiesen, daß die Erfindung nicht auf die Verwendung der hier im Beispiel dargestellten Transistoren beschränkt ist.Finally, it should be noted that the invention is not limited to the use of the transistors shown here in the example.
Als Schaltelemente können an sich beliebige Verstärker, beispielsweise Elektronenröhren mit Pentoden-Charakteristik, eingesetzt werden.Any amplifier, for example electron tubes with pentode characteristics, can be used as switching elements. can be used.
009 628/159009 628/159
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL33383A DE1091219B (en) | 1959-06-05 | 1959-06-05 | Self-excited inverter, containing non-linear amplifier elements arranged in a push-pull circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEL33383A DE1091219B (en) | 1959-06-05 | 1959-06-05 | Self-excited inverter, containing non-linear amplifier elements arranged in a push-pull circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1091219B true DE1091219B (en) | 1960-10-20 |
Family
ID=7266263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEL33383A Pending DE1091219B (en) | 1959-06-05 | 1959-06-05 | Self-excited inverter, containing non-linear amplifier elements arranged in a push-pull circuit |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1091219B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3172060A (en) * | 1961-11-08 | 1965-03-02 | Honeywell Inc | Starting circuit for semiconductor inverters |
US3257604A (en) * | 1961-07-07 | 1966-06-21 | Westinghouse Electric Corp | Inverter |
DE1271253B (en) * | 1965-12-23 | 1968-06-27 | Siemens Ag | Converter arrangement with thyristors |
-
1959
- 1959-06-05 DE DEL33383A patent/DE1091219B/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3257604A (en) * | 1961-07-07 | 1966-06-21 | Westinghouse Electric Corp | Inverter |
US3172060A (en) * | 1961-11-08 | 1965-03-02 | Honeywell Inc | Starting circuit for semiconductor inverters |
DE1271253B (en) * | 1965-12-23 | 1968-06-27 | Siemens Ag | Converter arrangement with thyristors |
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