SU87747A1 - Apparatus for producing pointed voltage pulses for controlling ionic valves - Google Patents

Description

For clear and reliable ignition of ionic valves with control grids, the ignition direction in the form of sharp-pointed impulses is usually used. In order to obtain and; ignition pulse pulses, the most common transformers are.

These pictransformers, however, have a low efficiency and a relatively complex magnetic circuit.

The object of the present invention is a device that allows obtaining the voltage of a pointed shape without pictransformers. To this end, the circuit of each phase of the secondary windings of the phase regulator of the device is connected in series with the valves and primary windings of current transformers, from the secondary windings of which the voltage pulses are used to control the ionic valves.

To obtain the required current form in the primary windings of current transformers, a choke with a high inductance can be included in their common circuit.

In order to obtain an undistorted control voltage pulse, the secondary windings of current transformers can be bridged by active resistances.

Diagram of the device depicted on the fng. 1, on fng. Figures 2 and 3 show the variation curves, respectively, of the primary and secondary currents of current transformers.

The secondary windings of the phase regulator FR through the dry rectifiers B and the primary windings of the current transformers TG are closed to a smoothing choke Dr, which allows to obtain the desired shape of the current curve.

 , 87747 2 -

.... The secondary windings of CT current transformers are loaded with ballast 1 resistance Rg-. the voltages from which are used to control the grids of the ion valve IV.

. The anodic theca of a three-phase single-phase rectifier formed by dry valves B, which are powered by the phase switch of the FR, and the loaded CT current transformers and the significant inductance dr, have an almost rectangular curve shown in FIG. 2

The magnetic flux F in the core of current transformers has the same curve shape.

Emf secondary windings of current transformers de have

the shape of the gabled pulses and are depicted for a single phase in FIG. 3. The same shape of the curve has the voltage taken from the ballast resistance Rg. The voltage of the received voltage, besides the positive peak, has a negative peak B (see Fig. 3), which is fed to the grid of the controlled valve at the moment of its extinction and slightly reduces the deionization time of the valve.

Subject invention

Claims (3)

1. A device for producing pointed voltage pulses designed to control ion and valves, characterized in that the circuit of each phase of the secondary windings of the phase regulator is connected in series with valves and primary parts of current transformers, the secondary pulses of which are removed for controlling ion valves 2. The device according to claim 2, characterized in that, in order to obtain the necessary current waveform in the primary windings of current transformers, a choke having a high inductance is included in their common circuit. 3. The device according to paragraphs. 1, 2, characterized in that, in order to obtain an undistorted control voltage pulse shape, the secondary wraps of current transformers are bypassed by active resistances. TT, 77, V I) i it  FIG. I Current 77, Gon TT Ton TT