SU62187A1 - A device for obtaining non-linear current-voltage characteristics - Google Patents

Description

In known devices for obtaining nonlinear current-voltage characteristics based on ferroresonance voltages, their action depends on the frequency of the current.

The described device eliminates this drawback and its circuit is insensitive to frequency oscillations. This is achieved by the fact that the magnetized choke, in which the magnetizing winding is connected through the cuprox rectifier parallel to the second choke, is connected in series with the second choke by a small capacitor.

FIG. 1 shows a diagram of an apparatus for obtaining nonlinear current-voltage characteristics operating as a relay; in fig. 2 - the same device operating as a voltage stabilizer.

The auxiliary choke 2 is connected with the choke coil / bias coil.

The total current of the circuit (FNG. 1) depends mainly on the total conductance of the throttles / bias and capacitor 4. As the voltage LJ increases, the inductive resistance of the chokes, determined by the bias current, decreases. From a certain critical value of the voltage, the full conductivity of the penalty starts to fall so quickly that the curve of the current-voltage characteristic of the voltage is bent and an unstable regime occurs. The maximum current is determined by the circuit parameters and its active resistance. It is possible to RECEIVE a circuit with a co-factor return of the order of 0.95–0.97, i.e., a very high sensitivity to nanotechnology.

Wo 62187-2 -

By varying the current ic passing through the capacitor, the critical voltage can be dramatically varied. The variations of the currents ix in the choke and ic in the capacitor when the frequency of the oscillations on the sign is opposite. Therefore, at a certain value of the currents, their sum can remain constant.

For almost the entire working part, the characteristics of the mains frequency are almost not reflected at the critical voltage (less than ID / O on frequency variations).

The executive element of the circuit can be included either on the main day or in the rectified current circuit.

The use of a device for direct voltage stabilization (Fig. 2) is possible by selecting an appropriate characteristic. Frequency insensitivity and, therefore, high accuracy of operation are the benefits of this stabilizer.

As well as ferroresonance systems, the proposed device can serve to replace an electromagnetic voltage relay in all cases where low cost and reliability of operation is required (determined by the absence of lamps and contacts). The proposed device is particularly suitable for the purpose of voltage stabilization in technically imperfect networks, where frequency fluctuations prevent the use of ferroresonance circuits (when the network frequency changes by 10 o / o critical voltage they range by 15-20 o / o).

An apparatus for obtaining non-linear current-voltage characteristics, in particular for stabilizing the voltage or acting as a voltage relay, using two series-connected chokes, one of which is magnetized by a direct current, characterized in that in order to obtain a circuit insensitive to oscillation m frequency, magnetizable choke, in which the jumper winding is connected through the cuprox attenuator parallel to the second choke, in series connection with the last condenser small capacity tank

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