DE298526C

DE298526C -

Info

Publication number: DE298526C
Application number: DENDAT298526D
Authority: DE

Description

In ähnlicher Weise, wie in elektrischen Zentralen das Generalvoltmeter den Mittelwert der einzelnen Speisepunktspannungen anzeigen soll, wird in elektrischen Fernzeigeranlagen in manchen Fällen an einem Empfänger die Angabe des Mittels aus einer Reihe von Einzelwerten verlangt, die an einer entsprechenden Zahl von Gebern aufgegeben bzw. eingestellt worden sind. Gleichzeitig wird verlangt, daß die EinzelwerteIn a similar way to how the general voltmeter measures the mean value of the to indicate individual feed point voltages, is used in electrical remote pointer systems in some In the case of a recipient, the indication of the mean from a series of individual values requested that have been given up or stopped at a corresponding number of donors. At the same time it is required that the individual values

ίο an besonderen Empfängern abgelesen werden können. .ίο can be read on special receivers can. .

Die Lösung dieser Aufgabe ist z. B. in.der Weise versucht worden, daß der gemeinsame oder Mittelempfänger statt einer einzigen eine Reihe von Wicklungen erhält, denen die von den einzelnen Gebern hergestellten Spannungen zugeführt werden. Die Unterbringung dieser Vielfachwicklung stößt erklärlicherweise auf Schwierigkeiten. Außerdem entsteht aber beiThe solution to this problem is z. B. has been tried in such a way that the common or center receiver receives a series of windings instead of a single one, which those of The voltages produced are fed to the individual encoders. The accommodation of this Multiple windings, of course, encounter difficulties. In addition, however, arises at

ao Verwendung von Wechselstrom infolge der durch diese Anordnung bewirkten magnetischen Verkettung der Einzelspannungen eine Rückwirkung der einzelnen Geber aufeinander, die in dem Sinne eines Ausgleichs wirkt. Die Einzelspannungen werden daher wesentlich gleich werden, und es. wird nicht mehr möglich sein, die an den Gebern eingestellten Einzelwerte an den zugehörigen Einzelempfängern abzulesen. Letztere werden vielmehr sämtlich wesentlich gleiche Angäben machen.ao use of alternating current due to the magnetic effect caused by this arrangement Concatenation of the individual voltages a reaction of the individual encoders to one another, the acts in the sense of a balance. The individual voltages are therefore essentially the same be, and it. will no longer be possible to use the individual values set on the encoders read from the associated individual recipients. Rather, the latter all become essential make the same information.

Nach der vorliegenden Erfindung werden die von den einzelnen Gebern gebildeten Spannungen hintereinander geschaltet, so daß auf den Mittelempfänger die Summe der sämtlichen Einzelspannungen wirkt, während den Einzelempfängern die durch die geringe Stromentnahme für den Mittelempfänger nicht merklich veränderten Einzelspannungen zugeführt wer- · den. Handelt es sich um eine größere Zahl von Gebern, so kann die Summe der Einzelspannungen leicht eine gefährliche Höhe erreichen. Es ist daher vorteilhaft, jedem Geber einen Zusatzwiderstand zu geben, der gleichzeitig mit ihm in die Serienschaltung eingefügt wird und der einen angemessenen Teil der Geberspannung verzehrt. Der dem betreffenden Geber zugehörige Einzelempfänger wird dagegen unmittelbar an die Geberwicklung angeschlossen. Bei dieser Anordnung kann dann auch unbeschadet des Drehmomentes des Mittelenipfängers die Zahl der Geber beliebig variabel sein. In keinem Fall kann dabei weder zwischen Teilen der Anlage unter sich noch zwischen einem Punkt der Anlage und Erde eine gefährliche Spannung, d. h. ein Vielfaches einer Einzelgeberspannung, auftreten.According to the present invention, the voltages generated by the individual sensors connected in series, so that the sum of all Individual voltages act while the individual receivers are affected by the low power consumption not noticeably changed individual voltages are supplied for the funds recipient the. If there is a larger number of encoders, the sum of the individual voltages easily reach dangerous heights. It is therefore advantageous to add an additional resistor to each encoder to give, which is inserted into the series circuit at the same time and the consumed an appropriate part of the encoder voltage. The one belonging to the relevant encoder Individual receivers, on the other hand, are connected directly to the encoder winding. With this arrangement can then also without prejudice of the torque of the central receiver, the number of encoders can be varied as required. In no case can neither Parts of the system between one another and a dangerous point between one point of the system and the earth Tension, d. H. a multiple of a single encoder voltage occur.

Die Fig. ι stellt das Beispiel einer solchen Anlage dar. Die Geberapparate G₁ bis G₃ sind hier als von unabhängigen Stromquellen gespeiste Widerstände dargestellt, von denen ein Gleitkontakt die dem jeweils zu übertragenden Wert entsprechende Übertragungsspannung ab-The Fig. Ι shows the example of such a system. The transmitter devices G ₁ to G ₃ are shown here as resistors fed by independent power sources, from which a sliding contact from the transmission voltage corresponding to the respective value to be transmitted.

Claims

takes. The EM funding recipient or recipients are here z. B. be a galvanometer whose deflection corresponds to the mean value of the individual encoder voltages. The individual receivers E1 to E3 are simultaneously - also designed as galvanometers - connected to the individual transmitters G1 to G3 and display the individual value set on the associated transmitter. Incidentally, the idea of the invention is applicable ίο regardless of the type of transmission system used. If several receivers are to display the mean value, they can be connected in parallel or in series, as shown in FIG. When using AC remote indicators, the encoder windings must of course have an open circuit, since several linked windings cannot be connected in series. If now, as is usually required, all receivers are attached to a central point in which the series connection of the various transmitters is made, the beginning and end of all winding parts must be brought up to this central point through separate lines. For a three-phase wound encoder there are six, for a two-phase wound four long-distance lines. In order to reduce this large number of cores, the series connection of the transmitters is carried out via transformers according to FIG. G1, G2 and G3 are three transmitters, from the settings of which in the funds receiver EM the average is to be formed. The transmitters are chained in the usual way, and each of them feeds the primary coils of a transformer via three lines in addition to its associated normal individual receiver E1 or E2 and E3. The secondary coils of these transformers are connected individually (not chained) one behind the other to the center receiver EM. In doing so, if the number of one. Switched encoders or encoder transformers is invariable, it is advisable to make the transformation ratio of the transformers equal to the reciprocal of the number of encoders, so that the sum of the secondary voltages - assuming the same encoder positions - is equal to the voltage of an encoder. Then the recipient of the funds can be a normal apparatus like the individual recipients. If the number of encoders varies greatly, it is better to select the transmission ratio 1: 1 and use the one already described above. By adding additional resistors Wz to the series circuit, if appropriate also inductive resistors, the total voltage and current intensity are kept within the permissible limits. P ate ν τ- claims:

1. A method for forming the means from 6p the settings of individual receivers caused by a number of electrical remote pointer transmitters, characterized in that the individual receivers (G ₁ to G ₃ )

. produced transmission voltages one after the other be switched to one (or more) receivers (ZTM) whose Adjustment therefore through the sums of the individual voltages and thus ■ also through whose mean values are conditional.

2. The method according to claim 1 for the application of AC remote pointers, characterized characterized that instead of the direct series connection of the

. can be connected in series via the secondary coils of transformers whose pri-

. märspulen are fed in a daisy-chained circuit from the encoders for the purpose of the To make it unnecessary to lead out all partial winding ends of the donors (Fig. 2).

3. The method according to claim 1 and 2, characterized in that in the series connection line of the transmitter resistors (Wz) are switched on, which can also be inductive if appropriate, for the purpose of keeping the total voltage and current within the permissible limits.

1 sheet of drawings.