DE671848C - Device to ensure the self-excitation of three-phase generators, especially for high-speed excitation - Google Patents
Device to ensure the self-excitation of three-phase generators, especially for high-speed excitationInfo
- Publication number
- DE671848C DE671848C DEA78549D DEA0078549D DE671848C DE 671848 C DE671848 C DE 671848C DE A78549 D DEA78549 D DE A78549D DE A0078549 D DEA0078549 D DE A0078549D DE 671848 C DE671848 C DE 671848C
- Authority
- DE
- Germany
- Prior art keywords
- auxiliary
- excitation
- generator
- winding
- anodes
- 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
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K19/00—Synchronous motors or generators
- H02K19/16—Synchronous generators
- H02K19/38—Structural association of synchronous generators with exciting machines
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Synchronous Machinery (AREA)
Description
Im Hauptpatent 663 000 wird eine Einrichtung zur Sicherstellung der Selbsterregung von Drehstromgeneratoren, insbesondere zur Schnellerregung, beschrieben, bei der die Erregerwicklung des Generators betriebsmäßig ,über in Gleichrichterschaltung arbeitende, für die volle Erregerleistung bemessene Entladungsstrecken gespeist wird und auf der Welle des Generators ein Drehstromhilfsgenerator mit Permanentmagnieiten zur Lieferung der Anfangserregung angeordnet und so bemessen ist, daß er während des Anlaufes oder nach Störungen, die Generatorspannung in kurzer Zeit so hoch treibt, diaß die Zündspannung der an die Klemmen des Generators angeschlossenen Entladungsstrekken überschritten und der Erregergleichrichter in Betrieb genommen wird.The main patent 663 000 is a device to ensure the self-excitation of three-phase generators, in particular for high-speed excitation, in which the excitation winding of the generator is operational , over working in rectifier circuit, dimensioned for the full excitation power Discharge paths is fed and a three-phase auxiliary generator on the shaft of the generator arranged with permanent magnets to deliver the initial excitation and is dimensioned in such a way that it maintains the generator voltage during start-up or after malfunctions in a short time so high that the ignition voltage of the at the terminals of the Generator connected discharge paths exceeded and the exciter rectifier is put into operation.
Trotz dieser Maßnahmen, die darauf ab-Despite these measures aimed at
na zielen, 'eine Selbsterregung des Drehstromgenerators sicherzustellen, besteht die Gefahr, daß der remanente Magnetismus des Hilfsdrehstromgenerators durch die von seiner Ständerdurchfluitung. herrührende Ankerrückwirkung so sehr geschwächt wird, daß eine Selbsterregung in Frage gestellt ist. Diese Gefahr wird gemäß der Erfindung dadurch vermieden, daß der einen Werkstoff hohler- Koerzitivkraft enthaltende Magnetkreis des Hilfsdrehstromgenerators so bemessen ist, daß durch die bei Belastung auftretende Ankerrückwirkung der remamente Kraftfluß um weniger als ioo/0 geschwächt wird. Hierdurch wird erreicht, daß die Zündung der an die Ankerwicklung der Synchronmaschine angeschlossenen Hauptanoden über Hilfsanoden oder einen besonderen Hilfsgleichrichter unter allen Umständen erzielt wird. na aim to 'ensure self-excitation of the three-phase generator, there is a risk that the remanent magnetism of the auxiliary three-phase generator by the flow of its stator. anchor reaction is weakened so much that self-excitation is called into question. This danger is according avoided by the invention that the material a magnetic circuit containing hohler- coercive force is dimensioned in the auxiliary alternator so that ioo / 0 is attenuated by the load occurring in the armature reaction remamente force flux by less than. This ensures that the ignition of the main anodes connected to the armature winding of the synchronous machine is achieved under all circumstances via auxiliary anodes or a special auxiliary rectifier.
In der Zeichnimg ist die Erfindung in zwei Ausführungsbeispielen veranschaulicht. ι ist die Erregerwicklung der Synchronmaschine, die an die Schleifringe 2 angeschlossen ist. Die Ankerwicklung ist mit 3 bezeichnet. Auf der Welle der Synchronmaschine ist das zweiteilige Polrad 4 des Hilfsdrehstromgenerators angeordnet, dessen Schenkel aus Platten 5 hoher Koerzitivkraft bestehen. Die Ankerwicklung: 6 des Hilfsdrehstromgenerators ist mit Hilfsanoden 7 des Gleichrichters 8 verbunden.In the drawing, the invention is illustrated in two exemplary embodiments. ι is the field winding of the synchronous machine, which is connected to the slip rings 2 is. The armature winding is denoted by 3. On the shaft of the synchronous machine is the two-part pole wheel 4 of the Auxiliary three-phase generator arranged, the legs of which consist of plates 5 high coercive force exist. The armature winding: 6 of the auxiliary three-phase generator is connected to the auxiliary anodes 7 of the Rectifier 8 connected.
Die Spannung des Hilfsdrehstromgenerators ist derart ausgelegt, daß bei der normalen Drehzahl der Synchronmaschine eine sichere Zündung an den Hilfsanoden 7 eintritt. Es fließt dann ein Gleichstrom überThe voltage of the auxiliary three-phase generator is designed so that with the normal Speed of the synchronous machine a safe ignition occurs at the auxiliary anodes 7. A direct current then flows over
*) Von dem Patentsucher ist als der Erfinder angegeben worden:*) The patent seeker stated as the inventor:
Dr.-Ing. Arthur Mandl in London.Dr.-Ing. Arthur Mandl in London.
Claims (2)
Es genügt, mit dem Hilfsdrehstromgenerator 30 bis 40 V zu erzeugen, um die Hilfsanoden sicher zum Zünden zu bringen. Bei einer Erregung des Turboinduktors mit 12 V und 30 A erregt sich der Turbogenerator so weit, daß die Hauptanoden sicher zünden und die Hilfsanoden 'erlöschen.A turbo generator of 30,000 kVA has an excitation power of around 120 kW. With the normal excitation voltage of 220 V, the nominal load in the inductor is about 220 VX 500 A, while idling about 250 A. Of this, about 150 A are consumed in the air gap, i.e. about 12 VX 30 A at 20.0 / 0 of the machine or excitation voltage .
It is sufficient to generate 30 to 40 V with the auxiliary three-phase generator to safely ignite the auxiliary anodes. When the turbo-inductor is excited with 12 V and 30 A, the turbo-generator is excited to such an extent that the main anodes ignite safely and the auxiliary anodes go out.
Wenn man eine Schwächung der Koerzitivkraft vollkommen vermeiden will, so ist eine Schaltung nach Abb. 2 möglich. Hier ist das Polrad 4 des Hilfsdrehstromgenerators mit einer Wicklung 10 versehen, mittels der nach erfolgter Zündung an den Hilfsanoden 7 ein die Ankerrückwirkung· kompensierendes Feld erzeugt wird. Neben der Wicklung 10 ist hierbei 'ein zusätzlicher Schleifring 11 erforderlich. Das andere Wicklungsende der Wicklung 10 kann unmittelbar mit der Erregerwicklung der Synchronmaschine verbunden sein.In Fig. 3, the power flow 0 of the auxiliary three-phase generator is plotted as a function of the exciting AW. With open. In the stator circuit, the no-load flow of force 0 O is created . If the machine provides power, so it produces charged at a constant resistance, Gegenflniperewindungen so that as actual voltage, the 'corresponding to the point of intersection / 3 comes about by the straight line £. "This is for purpose of corresponding Damensionierungj only slightly smaller than the idling point P 0 corresponding.
If you want to avoid a weakening of the coercive force completely, a circuit according to Fig. 2 is possible. Here the pole wheel 4 of the auxiliary three-phase generator is provided with a winding 10, by means of which a field which compensates for the armature reaction is generated on the auxiliary anodes 7 after ignition has taken place. In addition to the winding 10, an additional slip ring 11 is required here. The other winding end of the winding 10 can be connected directly to the field winding of the synchronous machine.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA78549D DE671848C (en) | 1936-02-18 | 1936-02-18 | Device to ensure the self-excitation of three-phase generators, especially for high-speed excitation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA78549D DE671848C (en) | 1936-02-18 | 1936-02-18 | Device to ensure the self-excitation of three-phase generators, especially for high-speed excitation |
Publications (1)
Publication Number | Publication Date |
---|---|
DE671848C true DE671848C (en) | 1939-02-16 |
Family
ID=6947448
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA78549D Expired DE671848C (en) | 1936-02-18 | 1936-02-18 | Device to ensure the self-excitation of three-phase generators, especially for high-speed excitation |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE671848C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE755413C (en) * | 1940-09-20 | 1953-03-09 | Sachsenwerk Licht & Kraft Ag | Device for briefly driving the auxiliary exciter of an alternating current generator equipped with an exciter converter |
DE758668C (en) * | 1939-03-05 | 1954-02-22 | Siemens Schuckertwerke A G | Excitation from self-excited alternators |
DE949960C (en) * | 1950-05-16 | 1956-11-08 | Siemens Ag | Device for supplying a direct voltage proportional to the speed |
-
1936
- 1936-02-18 DE DEA78549D patent/DE671848C/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE758668C (en) * | 1939-03-05 | 1954-02-22 | Siemens Schuckertwerke A G | Excitation from self-excited alternators |
DE755413C (en) * | 1940-09-20 | 1953-03-09 | Sachsenwerk Licht & Kraft Ag | Device for briefly driving the auxiliary exciter of an alternating current generator equipped with an exciter converter |
DE949960C (en) * | 1950-05-16 | 1956-11-08 | Siemens Ag | Device for supplying a direct voltage proportional to the speed |
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