SU130554A1 - Contactless switch - Google Patents

Description

The proposed contactless co.mmutator is a modification of the known switch according to the author. St. .N 130089, consisting in the fact that instead of feedback windings, electric capacitors connected to the transformer primary windings and tuned with them to ferroresonis are used for self-locking of transformers.

The drawing shows a schematic diagram of the proposed switch.

The designations on the diagram are as follows:

/, 2, 3 .... p-ferromagnetic three-rod transformers, L - inductances, C - capacitors, V - rectifiers, Wi, W-2 and W :; - winding

 - resist loads.

The inductances of the L elements are connected in parallel with capacitors C (or in series) with respect to the AC source. Because of this, by changing the inductance by saturating the cores, conditions for resonance can be created.

The secondary windings of the transformers feed through the rectifier V, the load resistances and the windings W-2 and W- of the two nearest transformers. A bias current and a control current are supplied through the winding Wi.

This system acts as a counting relay circuit, indicating the number of incoming pulses.

Ferroresonance systems fall into resonance at one value of voltage (or current) and fall out of resonance at a much lower value of voltage (or current).

To enhance the effect of nonlinearity of the circuit and more river state change, it is advisable to use nonlinear and compact capacitors made of barium titanite, etc.

Subject invention

Modification of the contactless switch on the author. ev jY 130089, characterized in that, instead of feedback windings, electric capacitors connected in parallel to the primary windings of transformers and tuned to them to ferroresonance are used to self-lock the transformers.