DE641407C - Method for frequency control of self-excited inverters operated with grid-controlled steam or gas discharge paths - Google Patents

Method for frequency control of self-excited inverters operated with grid-controlled steam or gas discharge paths

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Publication number
DE641407C
DE641407C DEA74861D DEA0074861D DE641407C DE 641407 C DE641407 C DE 641407C DE A74861 D DEA74861 D DE A74861D DE A0074861 D DEA0074861 D DE A0074861D DE 641407 C DE641407 C DE 641407C
Authority
DE
Germany
Prior art keywords
grid
discharge paths
changing
capacitor
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.)
Expired
Application number
DEA74861D
Other languages
German (de)
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.)
AEG AG
Original Assignee
AEG AG
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 AEG AG filed Critical AEG AG
Application granted granted Critical
Publication of DE641407C publication Critical patent/DE641407C/en
Expired legal-status Critical Current

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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
    • H02M7/445—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes

Description

Die Erfindung betrifft ein Verfahren zur Frequenzregelung selbsterregter, mit gittergesteuerten Dampf- oder Gasentladungsstrecken betriebener Wechselrichter. Das Verfahren besteht darin, daß die Frequenzregelung durch Regelung von. Widerständen in den Gitterkreisien vorgenommen wird.The invention relates to a method for frequency control of self-excited, grid-controlled Inverters operated by steam or gas discharge lines. The procedure is that the frequency control through regulation of. Resistances in the grid circles is made.

Es sind Wechselrichter bekanntgeworden, bei denen ebenfalls durch ,-Änderung vonThere are inverters become known, in which also by, -change of

to Widerständen in den Gitterkreisen die Frequenz der abgegebenen Wechselspannung geändert werden kann. Jedoch handelt es sich dort lediglich um den Abgriff einer veränderlichen Spannung an hauptstromdurchflossenenWiderständen; für jedeEntladungsstrecke muß dort ein besonders regelbarer Hauptstromwiderstand vorgesehen sein, welcher zusätzliche Energieverluste bedingt.to resistances in the grid circles changed the frequency of the alternating voltage output can be. However, it is only a question of tapping a variable Voltage at resistors through which the main current flows; there must be a specially controllable main current resistor for each discharge path be provided, which causes additional energy losses.

Die Nachteile dieser Einrichtungen werden durch den Erfindungsgegenstand vermieden. Erfindungsgemäß shad die zur Frequenzregelung dienenden veränderbaren Widerstände derart angeordnet, daß. sie nur vom Gitterstrom der Entladungsstrecken durchflössen werden.The disadvantages of these devices are avoided by the subject matter of the invention. According to the invention, the variable resistors used for frequency control are shaded arranged such that. they only flowed through by the grid current of the discharge paths will.

Die Abbildung zeigt die Anwendung des Erfindungsgedankens an dem Anwendungsbeispiel eines einphasigen selbsterregten Wechselrichters in Parallelanordnung. Der Speisegleichstrom fließt aus dem Gleichstromnetz 10 durch die Umformungseinrichtung, welche im wesentlichen aus dem Transformator 12, den Entladungsstrecken 13 und 14 mit den Anoden 16 bzw. 19 und den Kathoden 17 bzw. 20 und dem Kommutierungskondensatoi"2i besteht, und wird von dieser als Wechselstrom dem Verbraucher 11 entweder unmittelbar wie in der Abbildung oder über eine Sekundärwicklung des Transformators 12 zugeführt. Zwischen die Anoden 16 und 19 ist die Reihenschaltung eines KondensatorsThe figure shows the application of the inventive concept to the application example a single-phase self-excited inverter in parallel arrangement. The direct current feed flows from the direct current network 10 by the conversion device, which essentially consists of the transformer 12, the discharge paths 13 and 14 with the anodes 16 or 19 and the cathodes 17 or 20 and the commutation capacitor "2i exists, and is from this as alternating current to the consumer 11 either directly as in the picture or via a secondary winding of the transformer 12 supplied. A capacitor is connected in series between the anodes 16 and 19

23 und eines Widerstandes 22 eingefügt. An den Widerstand 22 ist die Primärwicklung23 and a resistor 22 inserted. The primary winding is connected to resistor 22

24 eines Transformators 25 angeschlossen. Die Enden der Sekundärwicklung 26 des *5 Transformators 2 5 sind gegebenenfalls über Strombegrenzungswiderstände mit den. Steuergittern 15 bzw. 18 der Entladungsstrecken verbunden, während die Mittelpunktsanzapfung der Sekundärwicklung 26 gegebenenfalls über .einen. Strombegrenzungswiderstand 27 und über einen Kondensator 30, dem ein veränderbarer Widerstand 31 parallelgeschaltet ist, mit den Kathoden der Entladungsstrecken24 of a transformer 25 is connected. The ends of the secondary winding 26 of the * 5 Transformer 2 5 are possibly over Current limiting resistors with the. Control grids 15 and 18 of the discharge paths connected, while the center tap of the secondary winding 26 if necessary about .a. Current limiting resistor 27 and a capacitor 30, which is a variable Resistor 31 is connected in parallel with the cathodes of the discharge paths

Claims (2)

und dem negativen Pol der Gleichstromleitung verbunden ist.and is connected to the negative pole of the DC power line. Der Kondensator 30 im Gitterkreis wird durch die Gitterströme der Entladungsv strecken jeweils aufgeladen und sucht seits sich über den Widerstand 31 zu laden. Es stellt sich daher am Kondensator..-, 30 eine mittlere negative Vorspannung ein, deren Höhe im wesentlichen von der Zeitkonstante des aus der Kapazität 30 und dem Widerstand 31 gebildeten Kreises bestimmt ist. Da diese Spannung in Reihe mit der von dem Hauptstromkreis abgeleiteten Steuerwechselspannung im Gitterkreis liegt, läßt sich durch Änderung dieser Spannung, d.h. also durch Änderung der Zeitkonstante des Kreises 30, 31, die Arbeitsfrequenz des Wechselrichters in einfachster Weise regeln. Wird beispielsweise die Wechselstroinbelastung 11 durch einen Synchronmotor gebildet, so kann mit der den Erfindungsgedanken verkörpernden Anordnung bequem eine Regelung der Drehzahl dieses Motors zwischen 500 und 4000 Umdrehungen in der Minute durch Änderung der Wechselrichter- as frequenz erzielt werden.The capacitor 30 in the grid circle is discharged by the grid currents stretch in each case charged and seeks hand over the resistor 31 to load. A medium negative bias is therefore established at the capacitor ..-, 30, the amount of which essentially depends on the time constant of the capacitance 30 and the Resistance 31 formed circle is determined. Since this tension is in series with the is derived from the main circuit control AC voltage in the grid circuit, leaves by changing this voltage, i.e. by changing the time constant of the Circle 30, 31, the working frequency of the Control the inverter in the simplest way. For example, the alternating current load 11 formed by a synchronous motor, so can the inventive idea Embodying arrangement conveniently regulates the speed of this motor between 500 and 4000 revolutions in the Minute can be achieved by changing the inverter frequency. ■■',. Patentansprüche: ■■ ',. Patent claims: ί ι. Verfahren zur Frequenzregelung selbsterregter, mit gittergesteuerten Dampf- oder Gasentladungsstrecken betriebener Wechselrichter durch Änderung von nur vom Gitterstrom der Entladungsstrecken durchflossenen Scheinwiderstanden (27, 30, 31)·ί ι. Frequency control method self-excited, operated with grid-controlled steam or gas discharge paths Inverter by changing only the grid current of the discharge paths through-flow impedances (27, 30, 31) 2. Anordnung zur Ausführung des Verfahrens nach Anspruch 1 für Wechselrichter in Parallelanordnung, dadurch gekennzeichnet, daß ein Kondensator (30), der durch einen mit Rücksicht auf die gewünschte Zeitkonstante veränderbaren Widerstand (31) überbrückt ist, in die Verbindungsleitung zwischen dem Mittelpunkt der Sekundärwicklung des Gittertransformators und den Kathoden der Entladungsstrecken eingeschaltet ist.2. Arrangement for performing the method according to claim 1 for inverters in parallel arrangement, characterized in that a capacitor (30), which by a with regard to the desired time constant variable resistor (31) is bridged into the Connection line between the center point of the secondary winding of the grid transformer and the cathodes of the discharge paths are switched on. Hierzu ι Blatt ZeichnungenFor this purpose ι sheet of drawings
DEA74861D 1930-04-25 1930-12-10 Method for frequency control of self-excited inverters operated with grid-controlled steam or gas discharge paths Expired DE641407C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US641407XA 1930-04-25 1930-04-25

Publications (1)

Publication Number Publication Date
DE641407C true DE641407C (en) 1937-01-30

Family

ID=22053827

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA74861D Expired DE641407C (en) 1930-04-25 1930-12-10 Method for frequency control of self-excited inverters operated with grid-controlled steam or gas discharge paths

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Country Link
DE (1) DE641407C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE973843C (en) * 1951-04-04 1960-06-23 Siemens Ag Inverter, especially for generating control voltages for spot weld welding machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE973843C (en) * 1951-04-04 1960-06-23 Siemens Ag Inverter, especially for generating control voltages for spot weld welding machines

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