SU1269116A1 - High-voltage d.c.voltage stabilizer - Google Patents

Abstract

The invention relates to electrical engineering, in particular, to power supplies of electronic equipment. The purpose of the invention is to increase the reliability of work. With a high input voltage and no signal at the corresponding output of control unit 7, only negative feedback signal from voltage divider 3 is supplied to comparison unit 5. It is compared with the reference signal. Voltage at the emitter junction of transistor element 2 is stabilized. for all modes. If there are signals at the outputs of block 7, the voltages at the collector-emitter junctions of elements 2 change. When the output voltage changes, it is stabilized using a voltage divider 12, an automatic gain control node 10, a signal amplifier 11 (L error and block 7 management 1 ill.

Description

The invention relates to electrical engineering and is intended for use in the implementation of power supply of electronic equipment, such as photoelectronic multipliers.

The aim of the invention is to increase the reliability by maintaining the value of the voltage transfer coefficient of each of the series-connected transistor control cells without overvoltage at the collector-emitter junctions of the transistor elements and uneven voltage drops across them in all possible modes of the stabilizer.

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

The device contains transistor control cells 1.1-1.Π, each of which includes a transistor element 2, a resistive voltage divider 3, a DC amplifier 4, a comparison unit 5 and a rectifier

6. In addition, the device comprises a control unit 7 with a generator 8, an isolation transformer 9, an automatic gain control (AGC) assembly 10 and an error signal amplifier 11, as well as a common resistive voltage divider 12 and terminals 13., 14 and 15, 16 for connecting the primary power supply and load, respectively. Cells 1.1-1.η are connected in series in one of two power buses located between terminals 13, 14 and 15, 16. A resistive voltage divider 12 is connected between terminals 15 and 16. The input of the control unit 7 (input of the amplifier 11 of the error signal) is connected with the output of the voltage divider 12. The inputs of the AGC assembly 10 are connected to the outputs of the error signal amplifier 11 and the generator 8, and the output is connected to the input of the isolation transformer 9. In each control cell 1.1-1.η, a voltage divider 3 is connected between the power terminals of the transistor element 2, the first input of the comparison unit 5 is connected : with the output of the voltage divider 3, the second input through the rectifier 6 with the corresponding output of the control unit 7 (output of the isolation transformer 9), and the output through the DC amplifier 4 with the control input of the transistor element 2,

The device operates as follows.

In the presence of a high voltage at the input of the stabilizer and the absence of a signal at the corresponding output of the control unit 7, only the negative feedback signal from the voltage divider 3 is fed to the comparison unit 5 of the control cell, where it is compared with the reference signal. The resulting mismatch signal is amplified by amplifier 4 and fed to the control input of transistor element 2. As a result, a given voltage is stabilized at the collector-emitter junction of transistor element 2, which is maximum for all stabilizer modes.

With the appearance of signals at the outputs of the control unit 7, the values of the reference voltages for the comparison units 5 decrease and, accordingly, the voltages at the collector-emitter junctions of the transistor elements 2 decrease. When the voltage at the output of the stabilizer increases (decreases), the signal from the output of the voltage divider 12 increases (decreases) to the input of the amplifier 11 of the error signal. After amplification, the error signal is fed to the corresponding input of the AGC block 10, decreasing (increasing) the output signals of the control unit 7, which leads to an increase (decrease) in the reference voltages of the comparison blocks 5 and an increase (decrease) in the collector voltage emitter junctions of transistor elements 2. As a result, the nominal value of the output voltage of the stabilizer is restored.

Claims (2)

The invention relates to electrical engineering and is intended for use in the implementation of electrical power supply of electronic equipment, such as photomultipliers. The aim of the invention is to increase the reliability of operation by maintaining the transmission coefficient value unchanged by the voltage of each successively connected transistor control cells without overvoltages on the collector-emitter transitions of transistor elements and non-uniformity of the voltage drops across them in all possible stabilizer modes. In the drawing, a pre-set functional diagram of a high-voltage DC-voltage regulator. The device includes transistor control cells 1.1-1.p., each of which includes transistor element 2, resistive voltage divider 3, amplifier 4 DC, unit 5 comparison and rectifier 6. In addition, the device includes a control unit 7 with a generator 8, an isolation transformer 9, an automatic gain control unit 10 (AGC) and an error signal amplifier 11, as well as a common resistive voltage divider 12 and terminals 13., 14, and 15, 16 for connecting a primary power source and a load, respectively. The cells 1.1-ln are connected in series to one of the two busbars located between terminals 13, 14 and 15, 16. Resistor voltage divider 12 is connected between terminals 15 and 16. The input of control unit 7 (error amplifier input 11) is connected to output divide l 12 voltage. The inputs of the AGC node 10 are connected to the outputs of the error signal amplifier 11 and the generator 8, and the output is connected to the input of an isolation transformer 9. In each regulating cell 1.1-1. A voltage divider 3 is connected between the power terminals of the transistor element 2, the first input of the comparison unit 5 connected; with the output of the voltage divider 3, the second input through the rectifier 6 - with the corresponding output of the control unit 7 (the output of the separation transformer 9), and the output through the DC amplifier 4 - with the control input of the transistor element 2. The device operates as follows in a way. If there is a high voltage on the stabilizer input and no signal at the corresponding output of the control unit 7, only the negative feedback signal from the voltage divider 3 is supplied to the comparison unit 5 of this or that regulating cell, where it is compared with the reference signal. The received error signal is amplified by the amplifier 4 and fed to the control input of the transistor element 2. As a result, the preset voltage at the collector-emitter junction of the transistor element 2 is stabilized, which is the maximum for all stabilizer modes. With the appearance of the signals at the outputs of the control unit 7, the values of the reference voltages for the comparison units 5 are reduced and the voltages at the collector-emitter junctions of the transistor elements 2 accordingly decrease. 12 voltage input to the amplifier 11 error signal. After amplification, the error signal is applied to the corresponding input of the AGC block 10, reducing (increasing) the magnitudes of the output signals of the control block 7, which leads to an increase (decrease) in the reference voltages of the comparison blocks 5 and an increase (decrease) in the voltages col.ctor-emitter junctions of transistor elements 2. As a result, the nominal value of the output voltage of the stabilizer is restored. The formula of the invention High-voltage DC voltage regulator, containing n transistor regulating cells connected in series to one of two power lines located between pairs of terminals for connecting the primary power source and load, resistive voltage divider connected between the terminals of the last of the specified pairs, block control, complete with p separate Vyosodamn and one common input. Connected to the output of the voltage divider, about tl 311269116 due to the fact that, for the purpose of the resistor element, the first input of the reliability of the operation, each comparison is connected to the output of the control cell, an additional voltage divider is inserted, The additional resistive divider of the second input is with the corresponding voltage and the comparison unit, with a 5-way circuit of the control unit, and an additional voltage divider output - with a control circuit is trans-connected between the power terminals of the tran- tor element.