SU1203661A1 - High-voltage stabilized d.c.power source - Google Patents

Abstract

The invention makes it possible to increase the reliability of obtaining a stable DC voltage, as well as the quality of stabilization by using a high voltage stabilized DC power source made on the basis of a pulse-width-controlled-voltage regulator, at the output of which a DC / AC converter is turned on. output connected via a high voltage rectifier to the output terminal. Moreover, the choke of the pulse stabilizer filter is made with an additional winding connected to the excitation input of the DC / DC converter. 1 il. 1C о о о О5 О5

Description

The invention relates to electrical engineering and is intended for use in the implementation of power supply of durable video monitoring systems.

The purpose of the invention is to increase the reliability and quality of stabilization of the output voltage by simplifying the structure and simultaneously testing the deviations of the output voltage by changing both the supply voltage of the used voltage converter and the duration of its excitation pulses.

The drawing shows a functional diagram of the proposed high-voltage stabilized DC power supply.

W.-m) The device contains a transistor switch ,, ,,:: 0 control element 1, LCD-filter. : .ussel 3, capacitor 4 and diode D |) M 5, single-ended converter 6 |; special voltage to variable with I;,) (); h:; with th |) ohm 7 and transformer 8;. strand1; rectifier 9, width-to-them; 1.chinahlly mode; 1 torus 10, block 11 compared to:; m and i.ieii: feedback to output i ::: i;: v. c py, made on the basis of the divide- g r 12 voltage. Key control- uuii TiJior / OHT 1, LCD-filter 2, conversion of DC voltage to AC voltage ip; (the high-voltage rectifier 9 is switched on and sequentially. One of the inputs of the latitude i; (the pulse modulator 10 is connected to the output; and) y, the clock puller (not shown), and the output - to the control input of the key regulating element 2. The input of the comparison unit 1 1 is connected to the output of the voltage divider 12, and the output is connected to the other input of the optical or pulse modulator 10. The throttle 3 of the LCD filter 2 is made with an additional winding, under the input transform. 1 6 constant voltage to the alternating voltage.

The device works as follows.

x.) constant} the UBX voltage across the a – 1 one; –and to the power input of the key control element 1. The continuous synchronous pulses are fed to one 113.; i.oH per-pulse and pulse modulator O, The output of which appears unr .: 1i.l5IO1tsis pulses opening the transistor of the regulating element 1. The formed voltage of the pulse form is filtered by the LCD-filter 2, the output of which is a constant voltage, the magnitude of which is the polar-pulse duration. This design is used by the d; 1 power supply of the converter 6. At one time, the excitation pulses are removed simultaneously with the additional winding of the choke 3. (: .1кк11 voltage transistor 7 converter 6.

The primary winding of the new transformer 8 appears non-transitory.

The voltage depends on the supply voltage of the converter 6 and on the duration of the excitation pulses. The increased voltage from the secondary windings of the transformer 8 is fed to the input of the high-voltage rectifier 9, at the output of which a constant high voltage Uvih of a given level is produced. From the output of the voltage divider 12, a signal is proportional to the output voltage Uvi to the voltage output, and is supplied to the comparison unit 11, where it is compared with the reference. The received error signal is fed to the corresponding input of the pulse-width modulator 10, which implements a change in the duration of the control pulses fed to the key regulating element 1.

The change in the output voltage Uv, due to the influence of destabilizing factors, causes a change in the signal coming in on the input of the comparator unit 11 from the output of the divider 12 in the circuit. This leads to a measurement of the error signal at the output of the comparator unit 11 and at the input of the pulse-width modulator 10. As a result, the duration of the control pulses applied to the transistor base of the regulating element 1 changes. This leads to a change in the constant voltage at the LCD output -filter 2, proportional to the length Q of post pulses. The voltage of the converter voltage b and, accordingly, its output voltage, i.e. the output voltage Uv, changes. the power source returns to its previous value.

Simultaneous change occurs

of the output voltage of the converter, due to the change in the duration of the pulses taken from the additional winding of the throttles 3 and fed to the base of the transistor 7, which contributes to enie higher accuracy in maintaining the output

About the voltage Uv. The result is a higher quality stabilization of the output voltage U. with a highly tipy design, and a source that predetermines the high reliability of its operation.

Formula inventions

High-voltage stabilized DC power supply containing sequentially connected key

a regulating element, an LCD filter, a DC / DC converter to a voltage and voltage rectifier, a pulse-voltage modulator, one of the inputs of which is connected to the output of the clock generator, and the output to the control input of a key regulating element, a comparator unit, the input of which is connected to the feedback circuit for the output voltage and the output to

Another input of the pulse-width modulator, characterized in that, in order to increase the reliability and quality of the output voltage stabilization, the LCD filter choke is made with an additional winding connected to the drive input of the DC / AC converter.

Claims (1)

Claim A high-voltage stabilized DC power supply containing a key control element in series, an LCD filter, a DC-AC converter and a high-voltage rectifier, a pulse-width modulator, one of the inputs of which is connected to the output of the clock generator, and the output to the control input of the key control element, a comparison unit, the input of which is connected to the feedback circuit for the output voltage, and the output to the LCD filter filter is made with an additional bmotkoy connected to the input transducer excitation DC to AC. another input of a pulse-width modulator, characterized in that, in order to increase the reliability of operation and the quality of stabilization of the output voltage,