SU1483564A1 - Gas-discharge device controller - Google Patents

Abstract

The invention relates to power converter technology and can be used to control multigrid EEC in switching circuits and to stabilize the voltage on a load. The purpose of the invention is to increase the efficiency and simplify the device. In the initial state, the transistor 5 is closed, which ensures the application of a blocking voltage from the power source 2 to the control grid gap — the cathode of the EEC 1. At the same time, the transistor 4 is open and shunts the gap of the EVP control grid 1. When the output polarity changes the signal from the source of the control signal 7, the transistor 5 opens, which leads to unlocking of the EEP 1. The voltage across the diode 6 causes the transistor 4 to lock up and the voltage applied to the screen grid from the power source 2 through the resistor 3 increases. In general, it is possible to control multigrid EEC from a single power source.

Description

FIG. R

The invention relates to power converter technology and can be used to control multigrid electrovacuum devices (EVP), such as a tetrode, in switching circuits and stabilizing the voltage on a load.

The purpose of the invention is to increase speed and efficiency.

FIG. 1 shows a device diagram; FIG. 2 is a diagram of the device with an additional power source. FIG. 3 is a schematic of the device with a second additional transistor.

The device for controlling the vacuum device 1 contains a power source 2, the positive terminal of which is connected to the first terminal of the screen resistor 3-, the second terminal of which is connected to the screen grid of the EEP 1 and to the collector of the transistor 4, the emitter of which is connected to the control grid of the AWP 1, the emitter of the first additional transistor 5, the anode of diode 6 and to the negative terminal of source 2, one anti-phase output of source 7 of the control signal is connected to the base of transistor 4, the cathode of diode 6 and through the limiting resistor 8 to to the positive terminal of source 2. The other anti-phase output of source 7 is connected to the base of transistor 5, the collector of which is connected to the cathode of the EEP 1 and through the cathode resistor 9 to the positive terminal of source 2.

In addition, the device may contain an additional source 1 O of power, connected according to source 2 between its positive terminal and the first terminal of resistor 3 (Fig. 2).

In addition, the device can contain a second additional transistor 11s whose collector is connected to the first output of resistor 3, the second output of which is connected to the screen of the EEP 1 through the base-emitter junction of transistor 11 (FIG. 3).

The control signal source 7 forms a opposite-polarity voltage at its antiphase outputs: when a positive signal is present at one output, the negative output g is at the other output and vice versa.

The device works as follows.

five

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In the initial state, the negative signal from the output of source 7 transistor 5 is closed, which ensures the application of a blocking voltage from the power source 2 to the control grid — the cathode of the electronically controlled fiber through a resistor 9 — and the transistor 4 is open by a positive signal from the output of the source 7 and shunts Span screen grid - control grid EVP 1, which significantly reduces the amount of voltage cutoff EVP 1, since the locking voltage is applied simultaneously to both grids EVP 1,

When the polarity of the output signal of source 1 is changed, transistor 5 opens, which leads to unlocking of the EEP 1, since the voltage on the control grid becomes close to zero, and is determined by the residual voltage drop on the transistor 5. The voltage drop on diode 6 from the control current of the transistor 5, the transistor 4 is locked, which provides an increase in the voltage applied to the screen grid of the EEP 1 from the power source 2 through the resistor 3.

The magnitude of the voltage applied to the screen grid of the EEP 1 in the conductive period can be increased by switching on an additional source 10 (Fig 2), which leads to an increase in the maximum current that can be switched by the EIS 1. The voltage from the source 2 of the power supply can be applied to the on-screen grid EVP 1 through the transistor 11, which significantly reduces the power loss in the nonconducting period, since the amount of current flowing through the resistor 3 can be chosen much less than the screen current of the EVP 1 in the on state .

Thus, due to the alignment of the switching speeds when turning on the EVP 1, due to the fact that the turn-on time is determined by the discharge of the input capacitance of the WEP 1 through the low output impedance of the first additional transistor 5, i.e. corresponds to the time of locking the device, which occurs due to a decrease in the voltage of the voltage on the screen grid when the transistor 4 is turned on, the device speed increases. With voltage applied to the screen of the EVP 1 through the second additional resistor 11 significantly reduces

power loss in the non-conducting period, due to which the efficiency of the device is increased.

Claims (3)

Invention Formula one . A device for controlling an electrovacuum apparatus, comprising a power source, the positive terminal of which is connected to the first terminal of the screen resistor, the second terminal of which is intended to be connected to the screen grid of the electrovacuum device and connected to the collector of the transistor, the control input of which is connected to one output of the control signal source, the diode of which is intended to be connected to the control grid of the electro-vacuum device, to the cathode of which one terminal of the cathode resistor is intended to be connected, the other terminal of which is connected to one terminal of the arc anichitelnogo resistor of m- lichayuschees in that in order to improve performance, it is provided with a first additional transistor, and a control signal source configured Hetero polar antiphase outputs, one of which is connected to the junction 0 50 the control inputs of the transistor, the cathode of the diode and the other output of the limiting resistor, and the other to the control input of the first additional transistor, the emitter of which is connected to the emitter of the transistor, the anode of the diode and the negative terminal of the power supply, and the collector is connected to one terminal of the cathode resistor, the other the output of which is connected to the positive output of the power source. 2. The device according to claim 1, that is, in order to increase efficiency, it is provided with an additional power source, and the specified connection of the positive output of the power source with the first output of the screen resistor is made via the included additional power source. 3. The device according to PP, 1 and 2, characterized in that it 5 is equipped with a second additional transistor, the collector of which is connected to the first output of the screen resistor, and the specified connection of the second output of the screen resistor is made through the base-emitter junction of the second additional transistor. 0 FIG. 2 FIG. 3