DE1048997B - Apparent consumption measuring device with a Hall generator - Google Patents

Description

GERMAN

The invention relates to a bill consumption meter with a Hall generator, on the first axis of which a magnetic field corresponding to one factor of the apparent consumption is below The use of rectifiers in the excitation circuit acts on the second axis of which one factor is the other corresponding current acts, while the third axis with a measuring device, in particular an electricity meter, communicates. Although the indication of such a device from the phase shift between current and voltage, the two factors of apparent consumption, shows in a given Each induction meter correctly displays the apparent consumption because the cosine of the phase wikele graphically there is a wavy line between current and voltage, which in the Soheitelbereidh is only a little of deviates from a parallel to the abscissa axis.

If the bill consumption is to be measured correctly in a larger angular range, then you can use several induction meters with different internal deviations, depending on the Phase angle is switched. Such a switchover takes place automatically when all counters are used runs simultaneously and connects to the display device via an overhaul gear, so that the fastest running counter, i.e. the one that is currently working in the apex area, is included is coupled to the counter.

The counters can be reduced to two, e.g. B. except for an active and a blind consumption meter, and derive the data of the other counters from the data of the two counters by means of differential gears. According to another type of solution, one winding of the induction device is connected to current, which others to voltage via a phase shifter. The phase shifter is set by a on the phase angle responsive device always controlled so that its output voltage is in phase with the current.

Such and similar measuring devices have the advantage that they work with induction devices, ie For example, avoid direct current meters, but the known, working with induction devices bill consumption meters turn out to be relatively complicated.

Other apparent consumption measuring devices work with direct current devices, for example direct current meters. These meters have a commutator, which is sensitive to overloads and short circuits, but otherwise requires a check at certain time intervals. When using a dynamometric DC meter, the current and the voltage are each supplied via a rectifier to the field coil and the armature of the meter for the purpose of measuring the apparent consumption. With an ampere bill consumption meter
with a hall generator

Applicant:

Siemens-Schuckertwerke

Corporation,

Berlin and Erlangen,

Erlangen, Werner-von-Siemens-Str. 50

Dr.-Ing. Siegfried Franck, Nuremberg,
has been named as the inventor

metric DC meter you can attach the armature to the third axis, i.e. the output side of a Hall generator, put on its first axis, i.e. its field winding, one factor of the apparent consumption, e.g. the voltage of the apparent consumption, corresponding magnetic field using Rectifiers acts in the excitation circuit and through its second axis, i.e. its input side the other factor of the bill consumption, e.g. B. the current of the bill consumption, more appropriate Electricity flows.

The invention manages with an induction device, in particular a meter, and thus avoids a direct current device in the apparent consumption measurement, but leads to a relatively simple design. According to the invention, a bill consumption measuring device, as mentioned at the beginning, is characterized in that that an induction measuring device, in particular a counter, serves as the measuring device, the first path of which is connected to the consumer voltage and its second path to the third axis, and that a constant phase shift between the voltage for the first. Path of the measuring device and the Voltage for the second axis of the Hall generator is provided. In the case of apparent consumption measurement for Three-phase current takes the place of the single-phase consumption current and the sum of the rectified current Phase currents, d. This means that the field winding of the Hall generator is connected in a summation circuit via a rectifier lying transformers of the phases connected. The Hall generator therefore leads on the input and output side Alternating current. The alternating current on the output side is the consumption current or the total consumption current of the three phases proportional.

809 730/196

Claims (2)

An embodiment of the subject matter of the invention is shown in the drawing. R, S, T are the three phases of a three-phase network. The voltage coil 1 of an inductive counter Z is connected to the voltage ^ .S ", the other coil 2 via a Hall generator fi to the voltage RT, namely this voltage is applied to the input terminal 3, 4 of the generator blade 7, the coil 2 to the Output terminal 5, 6 of the leaf connected. The leaf 7 lies in the mouth of an electromagnet 8, which is excited by a coil 9: The coil 9 is connected via a rectifier set G to current transformers W in summation circuit in the three phases R, S, T. The best known semiconductors with a carrier mobility (electron and defect electrons) of more than 6000 cm2 / V see, in particular more than 10,000 cnvVV see, are best used for the lamina 7. Such relationships arise, for example, with semiconductors of the type A111B v, for example with indium antimony. If one works here with field strengths of 10,000 Gauss, one can achieve Hall voltages in the order of magnitude of 0.1 V can operate devices and meters. In order to get the best performance out of the Hall generators, the internal and external resistances must be balanced accordingly. The arrangement works as follows: If no current flows in the three-phase network, the Hall generator H is de-excited. Its output current is zero. The higher the consumption of the three-phase network, the more the Hall generator H is excited, the greater its output current and the more strongly the coil 2 is excited. The values of the counter Z increase to the same extent. Optimal three-phase current conditions for the counter Z are achieved when the drive fields generated by the coils 1 and 2 are phase shifted by 90 °. This favorable phase shift can easily be achieved by appropriate phase adjustment, be it in the counter Z or by connecting it to appropriate phases of the three-phase network. Since the means for achieving such a phase alignment are known, they do not need to be explained in more detail here. ίο patent claims: 1. Apparent consumption measuring device with a Hall generator, on the first axis a dem magnetic field corresponding to a factor of the apparent consumption using rectifiers acts in the excitation circuit, on the second axis of which a current corresponding to the other factor acts, while the third axis with a measuring device, in particular electricity meter, in ao connection, characterized in that the measuring device is an induction measuring device, in particular -counter, whose first path with the consumer voltage and its second path with the third axis is connected, and that a constant phase shift between the voltage for the first path of the meter and the voltage for the second axis of the Hall generator is provided. 2. Device for three-phase current according to claim 1, characterized in that the field winding (9) of the Hall generator (H) is connected via rectifier (G) to transducers (W) of the phases (R, S, T) which are in summation hold is. Considered publications:
German interpretative document No. 1 010 156. 1 sheet of drawings