DE282998C - - Google Patents
Info
- Publication number
- DE282998C DE282998C DENDAT282998D DE282998DA DE282998C DE 282998 C DE282998 C DE 282998C DE NDAT282998 D DENDAT282998 D DE NDAT282998D DE 282998D A DE282998D A DE 282998DA DE 282998 C DE282998 C DE 282998C
- Authority
- DE
- Germany
- Prior art keywords
- additional
- voltage
- auxiliary machine
- mains voltage
- event
- 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
- 238000004804 winding Methods 0.000 claims description 11
- 230000005284 excitation Effects 0.000 claims description 2
- 108010083077 roundabout protein Proteins 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
- H02K23/02—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting
- H02K23/24—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting having commutating-pole windings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc Machiner (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Beim Kurzschluß von Gleichstrommaschinen tritt bekanntlich starkes Feuern an den Bürsten auf, das zu Überschlägen und Rundfeuer führen kann und für den Stromwender sehr schädlich ist. Vom Hauptstrom erregte Wendepole verbessern zwar die Kommutierung wesentlich, jedoch ist diese Verbesserung im Falle von Kurzschlüssen deshalb nicht ausreichend, weil sich das erforderliche erhöhte WendefeldIt is well known that when DC machines are short-circuited, the brushes fire intensely that can lead to flashovers and round-about fires and is very harmful to the commutator. Reversing poles excited by the main current improve the commutation significantly, but this improvement is in the case short circuits are not sufficient because the required increased turning field
ίο nicht genügend schnell ausbilden kann.ίο cannot train quickly enough.
Gemäß der Erfindung wird im Augenblick des Kurzschlusses das Wendefeld durch eine zusätzliche Erregung momentan bedeutend verstärkt. Die zusätzliche Wendepolwicklung wird vorteilhaft so gespeist, daß sie bei normalen Spannungen des Netzes unerregt bleibt, im Falle eines Kurzschlusses jedoch stark erregt wird. Dies kann beispielsweise dadurch erreicht werden, daß die zusätzliche Wendepolwicklung von der Differenz der Spannungen des Netzes und einer Hilfsmaschine gespeist wird. Beim normalen Spannungszustande heben sich die Spannung des Netzes und die Spannung der Hilfsmaschine gerade auf, so daß die zusätzliche Hilfspolwicklung unerregt bleibt. Beim Kurzschluß, d. h. beim Ausbleiben der Netzspannung, wird die zusätzliche Wendepolwicklung nahezu mit def vollen Spannung der Hilfsmaschine gespeist.According to the invention, the turning field is at the moment of the short circuit by a additional excitement momentarily increased significantly. The additional reversing pole winding is advantageously fed in such a way that it remains unexcited at normal network voltages, in the event of a short circuit, however, it is strongly excited. This can be done, for example be achieved that the additional reversing pole winding is fed by the difference between the voltages of the network and an auxiliary machine. In normal states of tension the voltage of the network and the voltage of the auxiliary machine cancel each other out, so that the additional auxiliary pole winding remains unexcited. In the event of a short circuit, i.e. H. if there is no mains voltage, the additional Reversing pole winding fed almost with the full voltage of the auxiliary machine.
In der Figur, die ein Ausführungsbeispiel der Anordnung zeigt, bezeichnet α den Anker der Hauptmaschine, b deren Feldwicklung, c deren normale vom Ankerstrom erregte Wendepolwicklung, d die zusätzliche Wendepolwicklung, die von der Differenz der Netzspannung und der Spannung der Hilfsmaschine e, f gespeist wird.In the figure, which shows an embodiment of the arrangement, α denotes the armature of the main machine, b its field winding, c its normal reversing pole winding excited by the armature current, d the additional reversing pole winding, which is fed by the difference in the mains voltage and the voltage of the auxiliary machine e, f will.
Die Hilfsmaschine kann getrennt angetrieben werden, sie kann auch mit der Hauptmaschine α gekuppelt sein. Damit bei Schwankungen der Netzspannung die Wicklung d nicht unnötigerweise erregt wird, kann die Hilfsmaschine e, f eine zusätzliche, vom Netz gespeiste Erregerwicklung g erhalten.The auxiliary machine can be driven separately, it can also be coupled to the main machine α. So that the winding d is not unnecessarily excited in the event of fluctuations in the mains voltage, the auxiliary machine e, f can have an additional excitation winding g fed by the mains.
Claims (2)
Publications (1)
Publication Number | Publication Date |
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DE282998C true DE282998C (en) |
Family
ID=538602
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DENDAT282998D Active DE282998C (en) |
Country Status (1)
Country | Link |
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DE (1) | DE282998C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100038360A1 (en) * | 2008-08-18 | 2010-02-18 | Mcdonnell Scott | Collapsible canister for preventing animals from retrieving contents therefrom when the canister is in a non-collapsed configuration |
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0
- DE DENDAT282998D patent/DE282998C/de active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100038360A1 (en) * | 2008-08-18 | 2010-02-18 | Mcdonnell Scott | Collapsible canister for preventing animals from retrieving contents therefrom when the canister is in a non-collapsed configuration |
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