DE118412C - - Google Patents
Info
- Publication number
- DE118412C DE118412C DENDAT118412D DE118412DA DE118412C DE 118412 C DE118412 C DE 118412C DE NDAT118412 D DENDAT118412 D DE NDAT118412D DE 118412D A DE118412D A DE 118412DA DE 118412 C DE118412 C DE 118412C
- Authority
- DE
- Germany
- Prior art keywords
- choke coils
- choke
- fields
- phase
- regulation
- 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
- 238000010276 construction Methods 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/36—Induction meters, e.g. Ferraris meters
- G01R11/40—Induction meters, e.g. Ferraris meters for polyphase operation
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
In dem gleichseitigen Dreieck (Fig. 1 der beiliegenden Zeichnung) bedeuten Ea Eb Ec die Spannungen, welche zwischen den Drähten 1 und 2, 2 und 3 und 3 und 1 des Dreiphasensystems herrschen, und es soll ein Magnetfeld erzeugt werden, welches gegen Eb- Ea, und ein zweites, welches gegen E6 eine im Bereich von 90 ° liegende Verschiebung hat; die Spannung Eb-Ea ist in dem Diagramm der Fig. 1 ebenfalls eingezeichnet, sie steht senkrecht auf Ec, so dafs das auf Eb-Ea senkrechte Magnetfeld mit E0 in Phase ist.In the equilateral triangle (Fig. 1 of the accompanying drawing) E a E b E c denote the voltages which exist between the wires 1 and 2, 2 and 3 and 3 and 1 of the three-phase system, and a magnetic field is to be generated which against E b - E a , and a second, which has a shift in the range of 90 ° from E 6; the voltage E b -E a is also shown in the diagram of FIG. 1; it is perpendicular to E c , so that the magnetic field perpendicular to E b -E a is in phase with E 0.
Die beiden Magnetfelder können nun wie folgt erzeugt werden: es werden drei Drosselspulen D1DiDs an die Leitungen 1,2,3 an~ geschlossen und in Stern geschaltet; alsdann entsteht, vorausgesetzt, dafs die Drosselspulen bestimmte Bedingungen hinsichtlich ihrer elektrischen Verhältnisse erfüllen, in der an 1 anliegenden Drosselspule D1 ein mit Ec in Phase befindliches, in der an 2 anliegenden Drosselspule D2 ein zu Eb senkrechtes Magnetfeld. Dies beweist Fig. 2; es sei z. B. die, Drosselspule D1, welche an 1 anliegt, so construirt, dafs sie fürThe two magnetic fields can then be generated as follows: there are three choke coils D 1 D D i s closed to the lines 1,2,3 to ~ and star-connected; then, provided that the choke coils meet certain electrical conditions, in the choke coil D 1 applied to 1 a magnetic field in phase with E c and in the choke coil D 2 applied to E b a magnetic field perpendicular. This proves Fig. 2; let it be B. the, choke coil D 1 , which is applied to 1, so designed that it is for
E1 = Eb · (cos 300 — 0,5 · tg 15°) = 0,732 Eb E 1 = E b (cos 30 0 - 0.5 tg 15 °) = 0.732 E b
geeignet ist und dafs dabei der Strom eine bestimmte Gröfse, z. B. 0,2 Amp. hat, und die Verschiebung 300 beträgt; die Drosselspule D2, welche an 2 anliegt, sei eingerichtet für die Spannungis suitable and that the current is of a certain magnitude, e.g. Is 0.2 amps and the offset is 30 0; the choke coil D 2 , which is applied to 2, is set up for the voltage
E2 =E 2 =
2 cos ι 52 cos ι 5
— 0,5i» Eb - 0, 5 i »E b
und soll dabei den gleichen Strom von 0,2 Amp. aufnehmen und eine Verschiebung von 7 5 ° haben; die Drosselspule D3, welche an 3 anliegt, sei ebenfalls für eine Spannung 0,518 Eb so construirt, dafs sie einen Stromand is supposed to absorb the same current of 0.2 Amp. and have a displacement of 75 °; the choke coil D 3 , which is applied to 3, is also designed for a voltage of 0.518 E b in such a way that it generates a current
J3 =. 2 · 0,2 · cos 750 = 0,4 · 0,26 — o,to4 Amp.J 3 =. 2 · 0.2 · cos 75 0 = 0.4 · 0.26 - o, to4 Amp.
aufnimmt und dabei eine Verschiebung von 300 hat; schaltet man diese drei Drosselspulen ein, so entsteht, wie man aus Fig. 2 erkennt, in D1 ein mit Ec in Phase befindlicher, in D2 ein auf Eb senkrechter Strom. Es ist natürlich nicht nöthig, dafs die Drosselspulen gerade die hier als Beispiel angenommenen Verhältnisse haben, nur müssen, wenn eine Drosselspule angenommen ist, die anderen in einem ganz bestimmten Verhältnifs zu ihr stehen. Für die praktische Ausführung wäre z. B. die Lage des Knotenpunktes in Fig. 3 der Lage in Fig. 2 vorzuziehen, weil dabei die Drosselspule D1 eine gröfsere Verschiebung, also geringeren Energieverbrauch als in Fig. 2 erhalten kann.picks up and has a displacement of 30 0 ; If these three choke coils are switched on, as can be seen from FIG. 2, a current in D 1 is in phase with E c and in D 2 a current perpendicular to E b. It is of course not necessary that the choke coils have the ratios assumed here as an example, only if one choke coil is assumed that the others have a quite definite relationship to it. For the practical implementation, z. For example, the position of the node in FIG. 3 is preferable to the position in FIG. 2, because the choke coil D 1 can receive a greater displacement, that is to say less energy consumption, than in FIG. 2.
Claims (1)
entsteht.To generate arrangement in three-phase systems, two magnetic fields, one of which is shifted from E b -E a and the other against E about 90 0, characterized in, that three choke coils are connected to the three lines, and connected in a star, wherein, according to Suitable construction of the choke coils or regulation, in the choke coil adjacent to line ι one against E b -E a , in the one adjacent to line 2 against E b
arises.
Publications (1)
Publication Number | Publication Date |
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DE118412C true DE118412C (en) |
Family
ID=387611
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DENDAT118412D Active DE118412C (en) |
Country Status (1)
Country | Link |
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DE (1) | DE118412C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5028248A (en) * | 1988-11-17 | 1991-07-02 | Tetronics Research & Development Co., Ltd. | Method of melting materials and apparatus therefor |
-
0
- DE DENDAT118412D patent/DE118412C/de active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5028248A (en) * | 1988-11-17 | 1991-07-02 | Tetronics Research & Development Co., Ltd. | Method of melting materials and apparatus therefor |
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