RU39224U1 - POWER SUPPLY FOR ELECTRONIC-OPTICAL CONVERTER - Google Patents

Abstract

The secondary power source for the electron-optical converter relates to electrical engineering and can be used in combination with various devices where primary power sources are used. The aim of the proposed technical solution is to ensure the stability of output voltages, regardless of external factors, the introduction of their digital adjustment, expanding the range of ARYA and reducing the dimensions of the device. The VIL contains: a voltage converter, a reference voltage source, a microcontroller, two DACs, an ARIA integrator, a key device, voltage transducers for the MCP and the screen, voltage multipliers. The device automatically adjusts the output voltages of the multipliers depending on the ambient temperature, while simultaneously monitoring the current of the ARIA.

Description

The proposed power device relates to the field of electrical engineering and can be used in combination with various devices to obtain the necessary high-voltage voltages, ensuring the operability of the electron-optical converter (EOC).

Known power supply device (EOP) 2002C (brochure Form 706-0699) of the company "K and M Electronics, Inc." - A developer and manufacturer of not only a variety of high-reliability military power supplies, but also the electronic components that make them up (11 Interstate Drive, West Springfield, MA 01089-4531 USA, http://www.kandm.com). The disadvantage of this device in its dependence of the output voltage on climatic conditions, as well as in its insufficient speed, in connection with which there is an unsatisfactory mode of operation of the vacuum part and its premature failure.

Closest to the claimed technical solution - the prototype - is a secondary power source for the image intensifier US patent No. 3739178 from 12.06.73, containing two generators 51 and 53, two voltage multipliers for powering the photocathode 12, microchannel plate (MCP) 16 and screen 20 , as well as the automatic brightness control (ARY) 57.

The prototype has common signs with the claimed device:

- generators of sinusoidal signals;

- voltage multipliers;

- ARY scheme.

The prototype has the following disadvantages:

1. There is no adjustment of the threshold current value of the ARIA.

2. The voltage levels of the MCP and the screen are adjusted manually using multi-turn resistors. This leads to a decrease in the reliability of the unit compared to electronic regulation.

3. Long standby time of the secondary power supply (VIL) (the time during which the output voltage of the VIL reaches 0.9 of the nominal).

The purpose of the proposed technical solution is:

- introduction of a thermal compensation circuit on the microcontroller to ensure the stability of output voltages, regardless of external factors;

- the introduction of an integrator on an operational amplifier with a low noise level and a high gain to adjust the range of the ARY and reduce the response time of the ARY;

- adjustment of output voltage values using a microcontroller via a data bus;

- the introduction of a key device to reduce the availability of the VIL;

- reducing the size of the device due to the use of modern element base.

This goal is achieved by the fact that in the device containing the microcontroller 3, digital processing of feedback signals occurs. The stability of the VIL output voltages is achieved by introducing a highly stable reference voltage source (ION).

The proposed device is illustrated by the following graphic materials:

Figure 1 - power device for the image intensifier tube;

Figure 2 is an electrical circuit diagram.

The device VIL (figure 2) contains: a voltage converter 1, a reference voltage source (ION) 2, a microcontroller 3, two digital-analog

converter (DAC) 4 and 5, integrator ARYA 6, key device 7, sinusoidal signal generators 8 and 9, voltage multipliers 10 and 11.

Converter 1 generates a constant voltage (3.3-3.6) V for powering the microcontroller, ION and DAC. ION forms a stable reference voltage of 1.2 V for the microcontroller and DAC. The microcontroller 3 is designed to control the operation modes of the VIL and adjust the output voltage depending on external factors. DACs 4 and 5 set the operation mode of the generators 8 and 9. The key device 7 serves to reduce the availability of the VILs (the time for which the output voltages are set to 0.9 from their nominal values). Generators 8 and 9 are designed to generate sinusoidal signals, which are then fed to the multipliers 10 and 11, and the multipliers, in turn, generate high constant voltage Ufk1, Ufk2, Umkp and Uekr.

The secondary power source for the image intensifier tube is as follows. The supply voltage Upit is supplied to the converter 1 and, simultaneously, to the generator 8 and generator 9. The microcontroller 3, depending on the ambient temperature and the set initial values, gives a control signal to the DAC 5, which, in turn, controls the screen generator 9. At this moment, the key device 7 is triggered. The feedback signal from the generator 9 is supplied to the integrator ARYA 6, amplified and transmitted to the feedback input of the microcontroller 3. Then the microcontroller 3, depending on the ambient temperature Food and ARYA current outputs a control signal to the DAC 4, which in turn controls the generator 8.

The positive effect of the proposed technical solution lies in the fact that the device, having small dimensions and weight, allows you to automatically adjust the output voltages of the multipliers depending on the ambient temperature,

digitally adjust the voltage levels of the MCP, the screen and the current of the ARIA via the data bus and reduce the response time of the ARIA by introducing an integrator on the operational amplifier.

Claims (2)

1. A power device for an electron-optical converter, comprising two parallel generators, voltage multipliers connected to each of them, characterized in that a converter and a reference voltage source are inserted into it, a key device, a microcontroller, an integrator for automatic brightness control and digital-to-analog converters, while the input of the microcontroller is connected to the output of the integrator automatic brightness control, and two outputs are connected to a digital-to-analog converter pits. 2. The device according to claim 1, characterized in that it is further provided with a data bus for digitally adjusting the voltage levels of the microchannel plate, the screen and the current automatic brightness control.