DE348967C - Automatic short-circuit device for three-phase motors - Google Patents
Automatic short-circuit device for three-phase motorsInfo
- Publication number
- DE348967C DE348967C DENDAT348967D DE348967DD DE348967C DE 348967 C DE348967 C DE 348967C DE NDAT348967 D DENDAT348967 D DE NDAT348967D DE 348967D D DE348967D D DE 348967DD DE 348967 C DE348967 C DE 348967C
- Authority
- DE
- Germany
- Prior art keywords
- mercury
- short circuit
- circuit device
- phase motors
- short
- 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
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 10
- 229910052753 mercury Inorganic materials 0.000 claims description 10
- 239000004020 conductor Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/02—Details of starting control
- H02P1/04—Means for controlling progress of starting sequence in dependence upon time or upon current, speed, or other motor parameter
- H02P1/12—Switching devices centrifugally operated by the motor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Centrifugal Separators (AREA)
Description
Selbsttätige Kurzschlußvorrichtung für Drehstrommotoren. Die vorliegende Erfindung bezieht sich auf Kurzschlußvorrichtungen für Drehstrommotoren, bei welchen der Kurzschluß der Phasenwicklungen des Ankers unter Anwendung eines flüssigen Leiters, z. B. Quecksilber, selbsttätig durch die Zentrifugalkraft erfolgt.Automatic short-circuit device for three-phase motors. The present The invention relates to short-circuit devices for three-phase motors, in which the short-circuit of the phase windings of the armature using a liquid conductor, z. B. mercury, takes place automatically by centrifugal force.
Die Erfindung besteht in einer Anordnung von mechanischenWiderständen in der O_uecksilber enthaltenden, mit der Welle des Drehstrommotors umlaufenden Büchse. Durch diese Widerstände, die aus perforierten Blechen o. dgl. bestehen können, kann der Lauf des Quecksilbers in der Büchse so gehemmt werden, daß das Eintreten des Kurzschlusses verzögert bzw. erst bei einer bestimmten Tourenzahl herbeigeführt wird.The invention consists in an arrangement of mechanical resistances in the O_uecksilber containing, rotating with the shaft of the three-phase motor Rifle. Through these resistances, which can consist of perforated sheets or the like, the flow of mercury in the can can be so inhibited that the entry of the short circuit is delayed or only brought about at a certain number of revolutions will.
Auf der Zeichnung ist schematisch ein Ausführungsbeispiel des Erfindungsgegenstandes dargestellt.An exemplary embodiment of the subject matter of the invention is shown schematically in the drawing shown.
Auf der Welle a des Drehstrommotors ist zweckmäßig neben den Schleifringen eine flache Büchse b angeordnet, die aus geeignetem Material, beispielsweise aus Metall oder Fiber, besteht. Die Büchse ist mit einem ringförmigen Hohlraum c ausgebildet, der an einer Seite fest verschließbar ist. In die Büchse a sind drei Kontakte f unter je i--o° Abstand eingeführt, die mit der inneren Umfangsfläche der Büchse glatt abschneiden. Wird die Büchse nicht aus Fiber oder einem anderen Isolationsmaterial hergestellt, so müssen naturgemäß die Kontakte isoliert befestigt werden. Der Innenraum c der Büchse ist mit einem flüssigen Leiter g, zweckmäßig mit Quecksilber, bis zu einem bestimmten Grade angefüllt, so daß in der Ruhestellung der Büchse durch das Quecksilber keine leitende Verbindung zwischen zwei Kontakten entsteht. In einer Ausdrehung des Hohlraumes c ist ein flacher Kupferring h eingesetzt, so daß deir äußere Ringraum k von dem übrigen Hohlraum d der Büchse durch den Kupferring getrennt ist. Der Kupferring h ist perforiert, beispielsweise mit ganz feinen Löchern i versehen.On the shaft a of the three-phase motor, a flat sleeve b, which is made of a suitable material, for example metal or fiber, is expediently arranged next to the slip rings. The sleeve is formed with an annular cavity c which can be firmly closed on one side. In the socket a three contacts f are inserted at a distance of i - o ° each, which cut off smoothly with the inner circumferential surface of the socket. If the socket is not made of fiber or some other insulation material, the contacts must of course be attached in an insulated manner. The interior c of the sleeve is filled to a certain degree with a liquid conductor g, suitably with mercury, so that when the sleeve is in the rest position, the mercury does not create a conductive connection between two contacts. A flat copper ring h is inserted into a recess in the cavity c, so that the outer annular space k is separated from the remaining cavity d of the sleeve by the copper ring. The copper ring h is perforated, for example provided with very fine holes i.
Sobald der Motor nach dem Anlassen auf Touren kommt, wird durch die Zentrifugalkraft das Quecksilber gegen die innere Umfangsfläche der Büche geschleudert. Das O_uecksilber muß dabei zunächst durch die feinen Durchbrechungen i treten, um zu den Kontakten f zu gelangen, so daß die Erreichung des Kurzschlusses verzögert wird. Durch geeignete Wahl der Größe der Löcher i läßt sich daher das Eintreten des Kurzschlusses bei einer bestimmten Tourenzahl erzielen. Anstatt perforierter Bleche lassen sich auch andere mechanische Widerstände zur Erreichung des genannten Zweckes in die Büchse b einbauen.As soon as the engine revs up after starting, the Centrifugal force hurled the mercury against the inner peripheral surface of the books. The O_uecksilber must first pass through the fine openings i in order to to get to the contacts f, so that the achievement of the short circuit is delayed will. Appropriate choice of the size of the holes i therefore allows entry of the short circuit at a certain number of revolutions. Instead of perforated Sheets can also have other mechanical resistances to achieve the above Built into the bushing b.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE348967T |
Publications (1)
Publication Number | Publication Date |
---|---|
DE348967C true DE348967C (en) | 1922-02-21 |
Family
ID=6257940
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT348967D Expired DE348967C (en) | Automatic short-circuit device for three-phase motors |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE348967C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1004264B (en) * | 1952-12-24 | 1957-03-14 | Siemens Ag | Electrical switch that works depending on the speed |
-
0
- DE DENDAT348967D patent/DE348967C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1004264B (en) * | 1952-12-24 | 1957-03-14 | Siemens Ag | Electrical switch that works depending on the speed |
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