SU1647539A1 - High-voltage dc voltage stabilizer - Google Patents

Abstract

The invention relates to the field of electrical engineering and can be used as a high voltage controlled stabilized DC source. The purpose of the invention is to increase the operational reliability and accuracy of regulation. The stabilizer contains a coupling valve 10 designed to avoid shunting the lower arm of the first voltage divider 9 by the first source of the reference voltage 11s, which increases the reliability of the stabilizer. By eliminating the second source of reference voltage 13 from the current circuit of the output voltage divider 14, the control accuracy is improved. 1 il. with e

Description

The invention relates to electrical engineering and can be used as a high-voltage controlled stabilized source of direct current.

The aim of the invention is to increase the operational reliability and accuracy of regulation of a high voltage voltage stabilizer.

The drawing shows a diagram of a high voltage DC voltage stabilizer.

The high-voltage DC voltage stabilizer contains 15 in turn first 1 and 2 control transistors, an inverter 3 with an output transformer · 4 rectifier 5 and a filter 6. The outputs of the differential amplifiers 7 are connected to the control inputs of the first f and second 20 of the 2 control transistors, respectively and 8, the inverting input of the first differential amplifier 7 is connected 'to the output 25 of the second voltage divider 9 and through an isolation valve 10 with a positive terminal of the first reference source 11 voltage, its inverting input connected to the output 30 per- Vågå voltage divider 12. The inverting input of the second differential amplifier 8 is connected to the positive terminal of the second reference voltage source 13, and the non-inverting 35 input is connected to the output of the input voltage divider 14 of the feedback circuit. Input pins 15 and 16, output 17 and 18.

¹ 40

High voltage stabilizer DC voltage operates as follows.

When connecting the voltage to the input pins 15 and 16 to the input of the inverter 15 3 through the first and second control transistors 1 and 2, a supply voltage of such magnitude will be applied that the output voltage at the output pins 17 and 18 corresponds to the factor of division of the divider 14 into account the voltage the second voltage reference voltage source 13. The output voltage level of the stabilizer is set by the voltage of the second voltage reference voltage source 13, which can be used as a precision digital-to-analog converter Vatel or potentiometric voltage divider -Connection | input to a reference constant voltage source. In stabilization mode, part of the output voltage taken from the divider 14 is compared in the second differential amplifier 8 with the reference voltage of the second reference voltage source 13, their difference is amplified and the output voltage of the second differential amplifier is supplied to the control input of the second control transistor 2. Any change in the output voltage will be compensated by a change in the conductivity of the second control transistor 2, while the first control transistor 1 will support almost constant voltage drop across the collector-emitter junction of the second control transistor 2 due to the presence of a feedback circuit including a first input voltage divider 12 and a second voltage divider 9 at the output of the second control transistor 2, the first * reference voltage source 11, a decoupling valve 10 and the first differential amplifier 7. In this case, the voltage across the collector * emitter junction of the second control transistor 2 will be determined by the ratio of the voltage and the outputs of the first and second voltage dividers 12 and 9 and the voltage of the first voltage source 11. The isolation valve 10 is designed to prevent shunting of the lower arm of the first voltage divider 9 by the first voltage reference source 11, which increases the reliability of the stabilizer.

Thus, the introduction of a decoupling valve into the high-voltage stabilizer of the DC voltage and the proposed connections can improve the reliability and accuracy of high output voltage regulation.

Claims (1)

Claim A high voltage DC voltage stabilizer comprising a first control transistor, one power terminal of which is connected to an input terminal, and a control terminal is connected to the first differential 16 amplifier, the inverter - with an output transformer, the output of which is connected to a rectifier connected to the filter in series, the second control transistor, · the control output of which is connected to the second differential amplifier, two reference voltage sources, the first voltage divider at the input of the second control transistor, the second divider the voltage at the output of the second control transistor and the third voltage divider of the output voltage, characterized in that, in order to improve operational reliability and For control purposes, it is equipped with an isolation valve, the second power output of the first control transistor connected to the first power output of the second control transistor, the second power output of which is connected to the inverter input, and the filter output is connected to the output terminal, while the inverting input of the first differential amplifier is connected to the output of the second voltage divider directly, and through the isolation valve with the positive output of the first source of the reference voltage, non-inverting input d is connected to the output of the first voltage divider 15, the inverting input of the second differential amplifier is connected to the positive terminal of the second reference voltage source, and the non-inverting input is connected to the output of the third voltage divider.