DE1114927B - Protection device for an externally controlled inverter - Google Patents

Protection device for an externally controlled inverter

Info

Publication number
DE1114927B
DE1114927B DEL33520A DEL0033520A DE1114927B DE 1114927 B DE1114927 B DE 1114927B DE L33520 A DEL33520 A DE L33520A DE L0033520 A DEL0033520 A DE L0033520A DE 1114927 B DE1114927 B DE 1114927B
Authority
DE
Germany
Prior art keywords
inverter
externally controlled
protection device
controllable semiconductor
controlled inverter
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
Application number
DEL33520A
Other languages
German (de)
Inventor
Friedrich Ludwig
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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
Priority to NL252910D priority Critical patent/NL252910A/xx
Priority to NL271628D priority patent/NL271628A/xx
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DEL33520A priority patent/DE1114927B/en
Priority to GB21366/60A priority patent/GB931322A/en
Priority to CH705960A priority patent/CH380226A/en
Priority to FR830600A priority patent/FR1260412A/en
Priority to BE592206A priority patent/BE592206A/en
Priority to DEL37623A priority patent/DE1136416B/en
Publication of DE1114927B publication Critical patent/DE1114927B/en
Priority to BE610179A priority patent/BE610179R/en
Priority to GB41239/61A priority patent/GB940597A/en
Pending 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
    • H02M7/53—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
    • H02M7/53846—Control circuits
    • H02M7/53862—Control circuits using transistor type converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
    • H02H7/1227—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters responsive to abnormalities in the output circuit, e.g. short circuit
    • 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
    • H02M7/538—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 push-pull configuration
    • H02M7/53803—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 push-pull configuration with automatic control of output voltage or current
    • H02M7/53806—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 push-pull configuration with automatic control of output voltage or current in a push-pull configuration of the parallel type
    • 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
    • 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
    • H02M7/53846—Control circuits
    • 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
    • H02M7/539—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 with automatic control of output wave form or frequency
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Description

DEUTSCHESGERMAN

PATENTAMTPATENT OFFICE

KL.21d32KL.21d 3 2

INTERNATIONALE KI.INTERNATIONAL AI.

H02j;dH02j; d

L 33520 Vmb/21d3 L 33520 Vmb / 21d 3

ANMELDETAG: 23. JUNI 1959REGISTRATION DATE: JUNE 23, 1959

BEKANNTMACHUNG
DER ANMELDUNG
UND AUSGABE DER
AUSLEGESCHRIFT: 12. OKTOBER 1961 NOTICE
THE REGISTRATION
AND ISSUE OF THE
EDITORIAL: OCTOBER 12, 1961

Es sind Wechselrichter bekannt, die von einer Hilfsspannungsquelle fremdgesteuert werden, so daß also die Frequenz unabhängig von der Art der Belastung des Wechselrichters ist. Bei geringfügigen Belastungsschwankungen ist dies von Vorteil. Tritt jedoch eine kurzschlußähnliche Störung auf der Ausgangsseite auf, so kann dies insbesondere zu einer Überlastung der umsteuernden Schaltelemente führen. Insbesondere sind steuerbare Halbleiter, wie Flächentransistoren, wegen der mit ihren kleinen Abmessungen verbundenen kleinen thermischen Zeitkonstanten besonders gefährdet. In diesem Fall ist auch ein Schutz durch Sicherungen wegen ihrer Trägheit nicht möglich. Ein wirksamer Schutz müßte unverzögert eingreifen.There are known inverters which are externally controlled by an auxiliary voltage source, so that so the frequency is independent of the type of load on the inverter. With minor fluctuations in load this is an advantage. However, if a short-circuit-like fault occurs on the output side on, this can in particular lead to an overload of the reversing switching elements. In particular, controllable semiconductors, such as junction transistors, are because of their small size Dimensions associated with small thermal time constants particularly at risk. In this case it is protection by fuses is also not possible because of their inertia. Effective protection should be immediate intervention.

In Anlage mit Quecksilberdampfstromrichtern ist es bereits bekannt, bei Störungen eine elektronische Gittersperreinrichtung wirksam werden zu lassen. Außerdem ist bereits die Verwendungsmöglichkeit von Transistorschaltern für Schutzzwecke beschrieben worden. Hieran knüpft die vorliegende Erfindung in neuer und vorteilhafter Kombination an.In systems with mercury vapor converters, it is already known to have an electronic device in the event of malfunctions To let the lattice barrier device take effect. In addition, the possibility of use is already there of transistor switches for protection purposes has been described. The present invention is linked to this in a new and advantageous combination.

Die Erfindung bezieht sich demgemäß auf eine Schutzeinrichtung für einen fremdgesteuerten Wechselrichter, enthaltend nichtlineare Verstärkerelemente, wie Transistoren, bei dem zur Fremdsteuerung ein selbsterregter Wechselrichter vorgesehen ist. Erfindungsgemäß wird vorgeschlagen, daß die Fremdsteuerung im Störungsfalle durch einen steuerbaren Halbleiter, insbesondere der Kollektor-Emitter-Strecke eines Flächentransistors, abgeschaltet wird, daß der steuerbare Halbleiter im Batteriezweig des selbsterregten Wechselrichters angeordnet ist und daß der steuerbare Halbleiter nach erfolgter Inbetriebnahme des fremdgesteuerten Wechselrichters von dessen Ausgangsgrößen bis zum Auftreten einer Störung geöffnet gehalten wird. Es ist darauf hinzuweisen, daß sich entsprechend den Ausführungen zum Stand der Technik das Schutzbegehren auf die Kombination der Merkmale des Hauptanspruchs, nicht aber auf seine Teilmerkmale richtet.The invention accordingly relates to a protective device for an externally controlled inverter, containing non-linear amplifier elements, such as transistors, in which an external control Self-excited inverter is provided. According to the invention it is proposed that the external control in the event of a fault by a controllable semiconductor, in particular the collector-emitter path a flat transistor, is switched off that the controllable semiconductor in the battery branch of the self-excited Inverter is arranged and that the controllable semiconductor after commissioning of the externally controlled inverter is opened from its output variables until a fault occurs is held. It should be noted that according to the statements on the status of Technology the protection request on the combination of the features of the main claim, but not on directs its partial characteristics.

Die weitere Erläuterung der Erfindung erfolgt an Hand der Figur. Der nur prinzipmäßig fremdgesteuerte Leistungswechselrichter 1 formt aus einer nicht näher dargestellten Gleichspannungsquelle die Gleichspannung in eine an der Sekundärwicklung des Transformators 2 abgenommene Wechselspannung um. Zur Fremdsteuerung des Leistungswechselrichters 1 ist der selbsterregte Wechselrichter 3 vorgesehen. An der Sekundärwicklung 41 seines Transformators 4 wird die benötigte Steuerwechselspannung für den Wechselrichter 1 abgenommen. Die Primär-The invention is further explained with reference to the figure. The one that is only externally controlled in principle Power inverter 1 forms the DC voltage source (not shown in detail) DC voltage into an AC voltage taken from the secondary winding of the transformer 2 around. The self-excited inverter 3 is provided for external control of the power inverter 1. The required AC control voltage is applied to the secondary winding 41 of its transformer 4 for the inverter 1 removed. The primary

Schutzeinrichtung für einen fremdgesteuerten WechselrichterProtective device for an externally controlled inverter

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

Friedrich Ludwig, Berlin-Hermsdorf, ist als Erfinder genannt wordenFriedrich Ludwig, Berlin-Hermsdorf, has been named as the inventor

Wicklungen 42 und 43 werden abwechselnd von den Schalttransistoren 5 und 6 an die Gleichspannungsquelle 9 gelegt. Zur Steuerung der Schalttransistoren 5 und 6 dienen die Rückkopplungswicklungen 44 und 45 des Wechselrichtertransformators 4.Windings 42 and 43 are alternately from the switching transistors 5 and 6 to the DC voltage source 9 laid. The feedback windings 44 and serve to control the switching transistors 5 and 6 45 of the inverter transformer 4.

Um nun den gewünschten Schutz des Leistungswechselrichters 1 zu erreichen, ist im Batteriezweig des selbsterregten Wechselrichters 3 die Kollektor-Emitter-Strecke des Flächentransistors 7 angeordnet, der ohne eine Steuerspannung an seiner Basis-Emitter-Strecke den Batteriezweig unterbricht. Als Steuerspannung für diesen Transistor 7 wird die Ausgangsspannung des Leistungswechselrichters 1 verwendet, die über einen Spannungsteiler 12, 13 von der Sekundärwicklung des Ausgangstransformators 2 abgenommen und in der Einrichtung 14 gleichgerichtet wird. Die Steuerspannung ist so gepolt, daß sie den Transistor7 öffnet.In order to achieve the desired protection of the power inverter 1, is in the battery branch of the self-excited inverter 3, the collector-emitter path of the flat transistor 7 is arranged, which interrupts the battery branch without a control voltage at its base-emitter path. As control voltage the output voltage of the power inverter 1 is used for this transistor 7, which is taken from the secondary winding of the output transformer 2 via a voltage divider 12, 13 and is rectified in the device 14. The polarity of the control voltage is such that it powers transistor7 opens.

Damit der selbsterregte Wechselrichters nach Schließen des Einschalters 8 anschwingen kann — der Transistor 7 wird ja erst leitend, wenn am Ausgang des Leistungswechselrichters 1 eine Spannung besteht —, wird zum Einschalten der Punkt A über den Vorwiderstand 11 kurzzeitig mit der Basis des Transistors 7 mittels des Tasters 10 verbunden. Die Steuerstufe schwingt dann an, wenn der Transistor 7 leitend geworden ist. Gegebenenfalls kann auf der Ausgangsseite des Leistungswechselrichters 1 ein weiterer Schalter vorgesehen sein, der geöffnet sein muß, bevor der Taster 10 in Funktion treten kann. Letzterer kann durch eine geeignete elektrische Verriegelung, beispielsweise durch einen Hilfskontakt am Schalter, bewirkt werden. Die Einschaltung des Verbrauchers erfolgt dann, wenn der Wechselrichter die erforderliche Betriebsfrequenz hat.So that the self-excited inverter can start to oscillate after closing the switch 8 - the transistor 7 only becomes conductive when there is a voltage at the output of the power inverter 1 - to switch on point A via the series resistor 11 is briefly connected to the base of the transistor 7 by means of the Push button 10 connected. The control stage then swings when the transistor 7 has become conductive. If necessary, a further switch can be provided on the output side of the power inverter 1, which switch must be opened before the button 10 can function. The latter can be brought about by a suitable electrical interlock, for example by an auxiliary contact on the switch. The load is switched on when the inverter has the required operating frequency.

109 708/173109 708/173

Tritt nun an den Ausgangsklemmen B und C des Transformators 2 ein Klemmenkurzschluß auf, so wird der Transistor? infolge des Fehlens der vom Ausgang des Leistungswechselrichters 1 gelieferten Basis-Emitter-Spannung gesperrt, der selbsterregte Wechselrichter 3 hört auf zu schwingen und steuert den Leistungswechselrichter 1 nicht mehr aus. Eine Gefährdung der in letzterem enthaltenden Umsteuerelemente, beispielsweise Transistoren, -wird so vermieden. Nach Beseitigung des Kurzschlusses wird der Wechselrichter durch Betätigung des Schalters 8 und des Tasters 10 wieder in Betrieb genommen.If a terminal short-circuit now occurs at output terminals B and C of transformer 2, does the transistor? Blocked due to the lack of the base-emitter voltage supplied by the output of the power inverter 1, the self-excited inverter 3 stops oscillating and no longer controls the power inverter 1. Endangering the reversing elements contained in the latter, for example transistors, is thus avoided. After the short circuit has been eliminated, the inverter is put back into operation by actuating switch 8 and button 10.

Der Vorteil des Erfindungsgegenstandes besteht darin, daß er unverzögert arbeitet und der Eingriff an der leistungsschwächsten Stelle vorgenommen wird. Der Transistor? kann etwa von der gleichen Größe sein wie die Transistoren 5 und 6 des selbsterregten Wechselrichters 3. Die Spannung zum Öffnen des Transistors 7 ist klein und somit die Steuerleistung gering.The advantage of the subject matter of the invention is that it works without delay and the intervention is carried out at the weakest point. The transistor? may be about the same The size of the transistors 5 and 6 of the self-excited inverter 3. The voltage to open of the transistor 7 is small and thus the control power is low.

Claims (2)

PATENTANSPRÜCHE:PATENT CLAIMS: 1. Schutzeinrichtung für einen fremdgesteuerten Wechselrichter, enthaltend nichtlineare Ver-Stärkerelemente, wie Transistoren, bei dem zur Fremdsteuerung ein selbsterregter Wechselrichter vorgesehen ist, dadurch gekennzeichnet, daß die Fremdsteuerung im Störungsfalle durch einen steuerbaren Halbleiter (7), insbesondere die Kollektor-Emitter-Strecke eines Flächentransistors, abgeschaltet wird, daß der steuerbare Halbleiter (7) im Batteriezweig des selbsterregten Wechselrichters (3) angeordnet ist und daß der steuerbare Halbleiter (7) nach erfolgter Inbetriebnahme des fremdgesteuerten Wechselrichters (1) von dessen Ausgangsgrößen bis zum Auftreten einer Störung geöffnet gehalten wird.1. Protection device for an externally controlled inverter, containing non-linear amplifier elements, such as transistors, in which a self-excited inverter is provided for external control, characterized in that the external control in the event of a failure by a controllable semiconductor (7), in particular the collector-emitter path a flat transistor, is switched off, that the controllable semiconductor (7) is arranged in the battery branch of the self-excited inverter (3) and that the controllable semiconductor (7) is kept open after commissioning of the externally controlled inverter (1) from its output variables until a fault occurs will. 2. Schutzeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Steuerstrecke des Halbleiters (7), insbesondere die Basis-Emitter-Strecke des Flächentransistors, von der zweckmäßig gleichgerichteten Ausgangsspannung des fremdgesteuerten Wechselrichters (1) erregt wird.2. Protection device according to claim 1, characterized in that the control path of the Semiconductor (7), in particular the base-emitter path of the flat transistor, from the expedient rectified output voltage of the externally controlled inverter (1) is excited. S.Schutzeinrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Inbetriebnahme durch kurzzeitig wirksame Schaltmittel, insbesondere Drucktaster (10), erfolgt, die mittels einer Hilfsspannung (9, 11) den steuerbaren Halbleiter (7) öffnen.S.Schutzeinrichtung according to claim 2, characterized in that the commissioning by Briefly effective switching means, in particular pushbuttons (10), are carried out by means of an auxiliary voltage (9, 11) open the controllable semiconductor (7). In Betracht gezogene Druckschriften:
Deutsche Patentschrift Nr. 758 237;
Funktechnik, 1958, S. 197 und 198.Considered publications:
German Patent No. 758,237;
Funkechnik, 1958, pp. 197 and 198. Hierzu 1 Blatt Zeichnungen1 sheet of drawings © 109 708/173 10.© 109 708/173 10.
DEL33520A 1959-06-23 1959-06-23 Protection device for an externally controlled inverter Pending DE1114927B (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
NL252910D NL252910A (en) 1959-06-23
NL271628D NL271628A (en) 1959-06-23
DEL33520A DE1114927B (en) 1959-06-23 1959-06-23 Protection device for an externally controlled inverter
GB21366/60A GB931322A (en) 1959-06-23 1960-06-17 A separately controlled inverter
CH705960A CH380226A (en) 1959-06-23 1960-06-20 Externally controlled inverter
FR830600A FR1260412A (en) 1959-06-23 1960-06-21 Safety circuit power oscillator
BE592206A BE592206A (en) 1959-06-23 1960-06-23 Power oscillator with safety circuit
DEL37623A DE1136416B (en) 1959-06-23 1960-11-25 Protection device for an externally controlled inverter
BE610179A BE610179R (en) 1959-06-23 1961-11-10 Safety circuit power oscillator.
GB41239/61A GB940597A (en) 1959-06-23 1961-11-17 A separately controlled inverter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEL33520A DE1114927B (en) 1959-06-23 1959-06-23 Protection device for an externally controlled inverter
DEL37623A DE1136416B (en) 1959-06-23 1960-11-25 Protection device for an externally controlled inverter

Publications (1)

Publication Number Publication Date
DE1114927B true DE1114927B (en) 1961-10-12

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Family Applications (2)

Application Number Title Priority Date Filing Date
DEL33520A Pending DE1114927B (en) 1959-06-23 1959-06-23 Protection device for an externally controlled inverter
DEL37623A Pending DE1136416B (en) 1959-06-23 1960-11-25 Protection device for an externally controlled inverter

Family Applications After (1)

Application Number Title Priority Date Filing Date
DEL37623A Pending DE1136416B (en) 1959-06-23 1960-11-25 Protection device for an externally controlled inverter

Country Status (5)

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BE (2) BE592206A (en)
CH (1) CH380226A (en)
DE (2) DE1114927B (en)
GB (2) GB931322A (en)
NL (2) NL271628A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3260921A (en) * 1962-10-26 1966-07-12 United Aircraft Corp Inverter clamping circuit
US3758841A (en) * 1971-11-11 1973-09-11 Gen Motors Corp Dc to ac static power converter with short circuit protection
DE2807999A1 (en) * 1978-02-23 1979-08-30 Licentia Gmbh Short circuit protection for transistor inverter - uses current rise limiting choke shunted by diode for separate suppression control

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2643985C3 (en) * 1976-09-29 1981-06-04 Siemens AG, 1000 Berlin und 8000 München Overload protection circuit for a transistor blocking converter with several output voltages
GB2193057B (en) * 1986-06-30 1990-04-04 Advance Power Supplies Ltd A power supply unit
JP3115116U (en) * 2005-07-26 2005-11-04 船井電機株式会社 Self-excited inverter circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE758237C (en) * 1937-12-23 1953-11-16 Siemens Schuckertwerke A G Switching arrangement for the controllable determination of the ignition time of electric arc converters

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE758237C (en) * 1937-12-23 1953-11-16 Siemens Schuckertwerke A G Switching arrangement for the controllable determination of the ignition time of electric arc converters

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3260921A (en) * 1962-10-26 1966-07-12 United Aircraft Corp Inverter clamping circuit
US3758841A (en) * 1971-11-11 1973-09-11 Gen Motors Corp Dc to ac static power converter with short circuit protection
DE2807999A1 (en) * 1978-02-23 1979-08-30 Licentia Gmbh Short circuit protection for transistor inverter - uses current rise limiting choke shunted by diode for separate suppression control

Also Published As

Publication number Publication date
NL271628A (en) 1900-01-01
BE610179R (en) 1962-03-01
BE592206A (en) 1960-10-17
NL252910A (en) 1900-01-01
CH380226A (en) 1964-07-31
GB940597A (en) 1963-10-30
DE1136416B (en) 1962-09-13
GB931322A (en) 1963-07-17

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