DE287322C - - Google Patents
Info
- Publication number
- DE287322C DE287322C DENDAT287322D DE287322DA DE287322C DE 287322 C DE287322 C DE 287322C DE NDAT287322 D DENDAT287322 D DE NDAT287322D DE 287322D A DE287322D A DE 287322DA DE 287322 C DE287322 C DE 287322C
- Authority
- DE
- Germany
- Prior art keywords
- phase
- groups
- star
- zigzag
- group
- 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.)
- Active
Links
- 230000001939 inductive effect Effects 0.000 claims description 4
- 230000004907 flux Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor And Converter Starters (AREA)
- Induction Machinery (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Bei dreiphasigen Induktionsmotoren, die mit großem Anzugsmoment anlaufen sollen, beispielsweise bei Kran- und Aufzugsmotoren, ist es wünschenswert, den Kraftfluß beim Anlauf vorübergehend zu steigern. Es ist bekannt, hierfür die Dreiecksternschaltung anzuwenden. Hierbei tritt jedoch bekanntlich im ersten Moment ein unerwünscht hoher Stromstoß ein.For three-phase induction motors that should start with a large starting torque, for example in crane and elevator motors, it is desirable to temporarily increase the power flow during start-up. It is known, use the triangular star connection for this purpose. However, as is well known, an undesirably high level occurs at the first moment Power surge.
ίο Gemäß der Erfindung werden die Ständerwicklungen des Induktionsmotors in an sich bekannter Weise je in zwei gleiche oder ungleiche Gruppen unterteilt und diese Gruppen, wie die Zeichnung zeigt, nach Art der Zickzackschaltung bei Transformatoren derartig zusammengeschaltet, daß jeweils eine Gruppe der einen Phase mit einer Gruppe einer anderen Phase verbunden ist. Hierdurch wird erreicht, daß die Gruppenspannungen sich nicht algebraisch, sondern geometrisch addieren, die E. M. K. der Phase also kleiner wird. Benutzt man diese Schaltung als erste Anlaßstufe, so ist der Motor höher gesättigt als normal. Bei gleichen Gruppen beträgt die Fluxsteigerung 2: }/J, d. h.'. etwa 15,5 Prozent; die Steigerung des Anzugsmomentes beträgt 4:3, d. h. etwa 30 Prozent. Man wird daher bei Anwendung dieser Schaltung bei Kran- und Aufzugsmotoren mit einem kleineren Modell auskommen, das eine dauernde Steigerung des schon für Kranbetrieb erhöhten Fluxes nicht aushalten würde. Die Schaltung hat weiter den Vorzug, daß sie Unregelmäßigkeiten in Wicklung und Feld und damit eine verschiedene Stromaufnahme in den einzelnen Phasen ausgleicht.According to the invention, the stator windings of the induction motor are divided into two equal or unequal groups in a manner known per se, and these groups, as the drawing shows, are interconnected in the manner of a zigzag circuit in transformers in such a way that one group of one phase with one group connected to another phase. This means that the group voltages do not add up algebraically, but geometrically, so that the EMF of the phase becomes smaller. If this circuit is used as the first starting stage, the motor is more saturated than normal. With the same groups, the flux increase is 2: } / J, ie '. about 15.5 percent; the increase in the tightening torque is 4: 3, ie about 30 percent. Therefore, when using this circuit in crane and elevator motors, a smaller model will be sufficient, which would not be able to withstand a permanent increase in the flux, which is already increased for crane operation. The circuit also has the advantage that it compensates for irregularities in the winding and field and thus a different current consumption in the individual phases.
In den Fällen, in denen die Dreiecksternschaltung statthaft ist, dagegen die Überschaltung von der Dreieck- zur Sternschaltung unerwünschte Stöße im Drehmoment bzw. in der Stromaufnahme des Motors hervorbringt, kann die Zickzackschaltung des Ständers auch als Zwischenstufe zwischen der Dreieck- und Sternschaltung verwendet werden; ebenso kann sie eine Zwischenstufe bilden bei der Sterndreieckschaltung. In those cases in which the triangular star connection is permitted, however, the over-connection from the delta to the star connection produces undesired surges in the torque or in the current consumption of the motor, the zigzag connection of the stator can also be used as an intermediate stage between the triangle and Star connection can be used; it can also form an intermediate stage in the star-delta connection.
Claims (2)
Publications (1)
Publication Number | Publication Date |
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DE287322C true DE287322C (en) |
Family
ID=542553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT287322D Active DE287322C (en) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE287322C (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE741160C (en) * | 1936-12-11 | 1943-11-05 | Siemag Siegener Maschb Ag | Control of roller corridors with individual drive of each roller by short-circuit armature motors for stiff and uneven rolling stock |
DE752248C (en) * | 1937-08-15 | 1952-05-05 | Siemens Schuckertwerke A G | Circuit for starting asynchronous starting electrical machines |
DE885878C (en) * | 1938-07-10 | 1953-08-10 | Brown | Device for undervoltage setting of synchronous generators |
DE1130060B (en) * | 1955-09-27 | 1962-05-24 | Licentia Gmbh | Switching device for single-phase AC motors |
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0
- DE DENDAT287322D patent/DE287322C/de active Active
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE741160C (en) * | 1936-12-11 | 1943-11-05 | Siemag Siegener Maschb Ag | Control of roller corridors with individual drive of each roller by short-circuit armature motors for stiff and uneven rolling stock |
DE752248C (en) * | 1937-08-15 | 1952-05-05 | Siemens Schuckertwerke A G | Circuit for starting asynchronous starting electrical machines |
DE885878C (en) * | 1938-07-10 | 1953-08-10 | Brown | Device for undervoltage setting of synchronous generators |
DE1130060B (en) * | 1955-09-27 | 1962-05-24 | Licentia Gmbh | Switching device for single-phase AC motors |
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