SU88526A1 - Device for forming and testing ion valves - Google Patents

Description

Lime devices for forming and testing ionic valves, which are artificial circuits, have a number of drawbacks, the main of which is the inadequate iodine of the working conditions in inverter mode.

R G1) simply: the device eliminates this disadvantage by using two sections of the active circuits, one of which (voltage circuit) contains malomon: irbrii high voltage circuit voltage capacitor IIIiii between the source of voltage and the commutator Iie - for example, the inductance of the scattering of the high-voltage source of radiation is used as the inductance of the resonant-1 circuit.

Tests in the inverter mode and, close to normal operation, are absorbed by incorporating a variable inductance into the loop current. The elimination of parasitic oscillations in the resonant circuit is made with the help of an additional damper nepi from the capacitor and the active () T11in (H1, switching on the parallel switch).

On fi1. 1 shows a diagram of the device; in fig. 2- curves depending on the voltage of the tested valve on the ignition angle of the auxiliary valve; in fig. 3-curves, illustrating the operation of the device.

The device (Fig. 1) consists of two synchronously operating circuits: a load current circuit and a load circuit.

In KOfrryp, the loads of the current.m include the transformer Trt, the test ventilators: | and B and / i- (in this case, for clarity, are called rectifier respectively. Inverter), for ruler resistance i and commutator circuit. Dr.

A voltage BBICOKOI-O transformer voltage Three enters the load circuit. auxiliary, single vents. Bi and Bi and capacitor Ci.

Capacitor Ci, forming a vibrate. a circuit with a high inductance dissipation inductance of the same} y-y, changes its

reloading according to reloading moment. FIG. 2 shows the characteristic of voltage surges and the maximum test pressure 1 Enn depending on the angle of the auxiliary valve. The curve / here denotes the voltage of a high-voltage transformer, the 2-surge voltage curve. curve 3 is the maximum test voltage. Since the absolute values of these voltages can exceed the amplitude value of the trans voltage (| x) of the armature by a factor of ten, the circuit can be called resonant | one.

The circuit is fed with a current. the possibility of adjusting the slope of the decay of the current on the inverter, as well as the moment of applying to it a positive voltage and the magnitude of the negative deionisation voltage. Thus, the circuit makes it possible to obtain fully tested valves in the ejection and inverter modes.

To explain the operation of the device, we consider the moment (Fig. 3) when the phase shift between the voltage m. T / i, the high voltage transformer and the voltage (7 "of the current transformer is 2, the Angle a is determined by the ratio of the voltage drop and the slope inverter current. The control voltages of the rectifier B and the inverter b can be sinusoidal and phased with the voltage. Neglected by the ignition voltage n, we can assume that the rectifier B and the inventory / W will light up when the voltage U g is on their anodes become postive The load current coincides in phase with the BcnoMoraTaibHbTe valves Vz and B are closed. The capacitor Ci on the plate facing the valves has a positive charge. In the circuit, there are two emf-Gdc capacitor and a voltage L ,, high voltage transformer connected in series.

Let the ignition pulse be applied to the gate valve Vz. at that moment when the U curve, the decay, approaches zero, as shown in

FIG. Behind. Since the Bi Ende rectifier burns, the ignition of the valve will close the discharge circuit of the capacitor Ci to the secondary winding of the high voltage transformer, the inductance of which will cause the capacitor to recharge, and the instantaneous value of the transformer voltage at this moment will increase charge by the value of and „. Since the additive produced by the capacitor has more voltage loss in the oscillating circuit, the voltage across the capacitor increases all the time until these values are equal. Due to this, in the circuit, the voltage and currents are much greater than those produced by the transformer. By shifting the moment of ignition of the auxiliary valve B, it is possible to change the voltage of the transformer at the time of recharging the capacitor, by adjusting the magnitude of the voltage of the charge of the capacitor.

At the moment the discharge current passes through zero, the Bi rectifier is closed and the negative voltage of the capacitor is applied to it through the illuminated auxiliary valve B-. In a real circuit, such a voltage jump corresponds to the phase switching moment. The adjustment of this test voltage is made by shifting the moment of ignition of the valve Vz. The voltage of the high voltage transformer, which at this time has passed into the negative range, is consistent with the voltage of the capacitor and complements the test voltage to normal form, as shown in FIG. 36

At the moment of discharge of the capacitor in the current loop due to the fall of the voltage on the choke, the inverter B2 will go out earlier than the voltage / ton curve of the current transformer goes through zero. The decay of the circuit current creates a voltage in the other region, which draws in the moment of the inverter quenching. By adjusting the inductance or current, you can adjust

Inverter inverter repair. If this rem is longer than the pulse duration, the siver is not lost and the discharge of the ID through the rectifier will go to the back of the discharge through the inverter. In the time interval between the inversion of the inverter Br and the discharge of the capacitor through a Bi rectifier on the inverter, a negative voltage is generated that depends on the inductance D and the magnitude of the discharge current. Changing the inductance, it is necessary to choose the voltage, the corresponding normal operation, and changing the load current at the moment of quenching - to determine the minimum deionization angle of the inverter, at which it maintains heat absorption. Even before the discharge of the capacitor, a negative voltage is applied to the inverter control grid, which keeps it V locked in the state after a boost before the supply of the igniting iiMnyjibCfi. Since the inverter B is connected in the opposite direction to the rectifier H1, then, as shown in FIG. 36, the negative test voltage supplied to the rectifier through valve B is applied with the opposite sign and to the inverter.

The slope of the decay of the current determines the initial conditions of the rectifier and inverter detalization. It is regulated by changing the time of the clutch-1 valve B and changing the inductance of the throttle. When measuring this current value by counting the moment of ignition of the valve Bc, the set value of the ignition jump changes. Therefore, the measurement of the steepness of the decay of the inverter current is carried out by offsetting the phase voltage of the current transformer relative to the set control voltage and transformer voltages.

The reverse charge of the capacitor occurs when the control and anode voltage of the -Va inverter take positive values. The current is recharged through an inverter Bz and an enie burning Bt. By the time of recharge, the main transformer is negative

voltage, stacks with capacitor voltage. Therefore, the process is ana disguised discharge through a rectifier. A negative reverse voltage will sense the auxiliary valve B1, which is therefore locked regardless of the sign, the charge on its grid. During the reloading of the capacitor (7, it becomes positive, the rectifier and the inverter V are ignited. The auxiliary valve is bridged by the high voltage bridge; 1 Bi and the return valve is passed through the Bi valve B. -, before the valve to be locked up in order to withstand, its full positive voltage of the capacitor is on it.Further to this voltage is added the positive voltage of the transformer, which rises to its maximum. Thus, the pattern of the reverse voltage is similar to that of the inverter. Sv.

Auxiliary ventilator B-i, after the passage of the discharge pulse, takes the same voltage jump as in the previously described case of the rectifier Bi.

After a reverse UE pulse is passed through the Bi-vitality, the high potential takes the linl cathode of this valve and one output of the capacitor. The localization of these high-frequency oscillations is produced by a damping circuit consisting of a series-connected resistance and a capacitor Cc connected in parallel to the Bi valve. As shown in FIG. 2, none of the rectifiers carry a Te.JbHoro negative fault with a positive voltage on the grid.

As is well known, in high-voltage rectifiers, reverse ignitions usually occur at maximum reverse voltages. Therefore, if the test valve fails to withstand the voltage applied to the voltage and gives reverse ignition at the maximum voltage on the transformer, the capacitor will discharge when the voltage is set to the output of the ignition at high discharge currents, the loop capacitor Ci is shunted by the discharge capacitor P with limiting resistance RS- After the discharge of the capacitor through the lazer of the repeated reverse ignitions of the low frequency is obtained. The restoration of the test voltage occurs only after several periods. If the strength of the rectifier is still not restored with periodic reverse ignition, the device operates as a unit for static tests. The same phenomena occur in reverse ignition on the inverter. Recognition is made with the help of a photoelectric relay, which fixes the reverse ignition on the B15 and the inverter.

To exclude the appearance of the current transformer, it is made with two secondary (windings).

The control of all the valves of a vzailgio is connected with the help of the regulator of the apparatus.

PR e; m e i and s get

Claims (3)

1. Organ | 1st form of 1g test of ionic valves, consisting of two separately separate circuits, of which contains the low-voltage test current source and the test currents, and the other resonant circuit, contains a low-power high-voltage voltage source, a capacitor and switching gates, and so on, for the sake of simplicity, the specified capacitor is turned on directly between the switching valves and the high voltage source, the leakage inductance of which is used as the inductance of the resonant circuit. 2. The device according to claim 1, in connection with the fact that, in order to provide the possibility of forming and testing the valves, both in the rectifier: hyyom and also in the nivertor mode, 15 conditions identical conditions of their normal operation, a variable inductor is connected to the primary circuit. 3. The device for and. I, excluding that, in order to prevent the occurrence of iarazitin ix of electric co.tebann in a resonant circuit, pa.ch .: 1no Ko.fmutirushiu to BK.I valves and a damper circuit, contains a capacitor and active s1; 1nne. F. 2