SU679965A1 - Pulsed dc voltage stabilizer - Google Patents

Description

(54) IMPULSE PERMANENT VOLTAGE STABILIZER

CURRENT

one

The invention relates to the field of voltage stabilization and can be used in the construction of power supplies for electronic equipment.

A voltage regulator is known which contains an adjustable one pulse single transistor transducer connected to an isolating-transforming device (for example, a converter) whose output is the output of the stabilizer and connected to the input of the control circuit, as well as an isolating transformer in the converter control circuit, the control circuit of the output is connected to the control input of the transistor converter through the optocoupler 1.

The closest technical solution to this invention is a switching voltage regulator with direct current, containing an adjustable pulse single-ended transistor converter, the input of which is connected to the input terminal, and the output to the input of the separation-conversion unit, the output of which is connected to the input terminal of the circuit

control of the specified converter, the input of which is connected to the output terminal, as well as the separation

transformer in the control circuit of a pulsed single-stage converter 2).

Such a stabilizer has special drawbacks. With a sufficiently high degree of control (when the input and output voltages, as well as the load, change significantly), the duty cycle of the control pulse converter varies over a wide range. As a result of that, because the transformer through which this impulse comes in is not. transmits a constant current component at a fixed amplitude of the control pulse at the output

The transformer dongle switch 0 is either overloaded by the emigter base voltage or is out of saturation. In both

Claims (5)

S-case decreases the reliability of the stabilizer. In addition, when operating in the described mode; it is necessary to transmit long pulses, which leads to an increase in the magnetizing inductance of the isolation transformer and, consequently, to an increase in its dimensions and mass. In general, the frequency at which the isolation transformer operates is determined by the switching frequency of the converter key and is quite low, which in its very best, it also increases the weight-size ratio of the transformer. The aim of the invention is to increase the reliability of the pulsed stabilization of the mash. This goal is achieved by the fact that, in a pulsed voltage regulator of a direct current 2J, the output of the converter control circuit is connected to the input of an input amplitude-pulse modulator, the output of which is connected to the input of an input high-frequency generator, the output connected to the primary winding of the isolation transformer, and the secondary the winding of the latter, having a tap from the middle point, is connected to the control input of the regulating pulse single-ended converter through an input rectifier that you The emitter – base transitions of the key transistors of the adjustable pulsed single-ended transistor converter are two-cycle, half-cycle, and the high-frequency generator is designed as a square-wave generator; in addition, a inverter is used as the splitter unit. The drawing shows a block diagram of a pulsed DC voltage regulator. The stabilizer contains a control circuit 1, the input connected to the output by the output, and the output to the input of an amplitude-pulse modulator 2, the output of which is connected to the input of the high-frequency generator 3, the output connected to the primary winding of the isolation transformer 4, and the secondary winding is connected. to the control input of a controlled pulse single-ended converter 5 containing a rectifier on transistors 6 and 7, and the output of the adjustable pulse single-ended transistor converter is connected to the input of a discharging-converting unit 8. The device operates as follows. In the process of regulation, control circuit 1 generates control pulses. These pulses are fed to the amplitude-pulse modulator 2, which controls the high-frequency generator 3. Therefore, from the output of the generator 3 to the input of the transformer 4, there are bursts of pulses. The duration and frequency of occurrence of each such packet corresponds to the duration and frequency of occurrence of control pulses. Each pulse of a pack through the transformer 4 creates in the base of transistors 6 and 7 a corresponding current pulse. But since The secondary winding of transformer 4 has a tap from the middle connected to the emitters of transistors 6 and 7, and its ends are connected to the bases of these transistors, then the base current pulses of transistor 6 are shifted by 180 relative to the base current transistors 7. carriers in the bases of the transistors, after the opening pulse on the base of the switched-on transistor disappears, the latter turns off not immediately, but with some delay, while the other transistor turns on. The turn-on time of the transistor is always less than the burden off even in the absence of saturation. In this case, the converter current will flow through another transistor, and the current in the external circuit will remain unchanged and will repeat the control pulses. Compared to the known, the proposed stabilizer allows to extend the stabilization limits of the output voltage up to the mode of operation when the converter key ceases to switch, since In the proposed scheme, there are practically no restrictions on the frequency and duration of the control pulses. Claims of an Inverter DC Voltage Regulator, containing an adjustable pulse single-ended transistor converter, the input of which is connected to the input terminal, and an output to the input of a converting unit, the output of which is connected to the output output, the control circuit of the specified converter, the input of which is connected to an output terminal, as well as an isolation transformer in the control circuit of a pulsed single-ended transistor converter, characterized in that, in order to elevate over zhnosti stabilizer, output control circuit connected to the input transducer inputted width modulator, whose output is connected to the input of the entered high-frequency generator, the output coupled to the primary winding of an isolating transformer, a secondary winding of the latter, having a tap from secondary point connected to the control input of an adjustable pulse single-ended transistor converter through the input rectifier 2. Pulse voltage regulator according to claim 1, characterized in that the rectifier is made on the emitter-base junctions of the key transistors of the adjustable pulse single-ended transistor converter. 3. The impulse stabilizer according to claims 1.1, characterized in that the “JTO rectifier is made according to the dual-wave dual waveform scheme. 4. Pulse stabilizer according to claim 1, characterized in that the high frequency generator is made in the form of a square pulse generator. 5. The impulse stabilizer according to claim 1, characterized in that a converter is used as the separating-converting unit. Note: in the form of an additional item one of the variants of the separating transducer unit is marked. Sources information taken into account during the examination 1.Golovatsky V.A., et al. Integral-hybrid switching voltage constant-voltage stabilizer. Sat s Electronic equipment in automation, vol. 6, 1974. 2. US patent number 3873846, cl. 307-23, 1975 (prototype).