SU415649A1 - - Google Patents

Description

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The invention relates to the field of industrial electronics and can be used in power supply devices for automation units, computing equipment and communication facilities.

Pulse DC voltage regulators are known, which contain a regulating transistor, an inductive capacitive filter, a reference source, a saturating transformer with windings, and a load.

In order to increase the stabilization factor and provide protection against short-circuits, an additional transistor was introduced into the proposed stabilizer, the emitter-base transition of which was shunted by a series of diodes and incandescent lamps, and the collector-base transition - by a diode. connected in series with one of the windings of the saturating transformer. An additional voltage source is connected to the emitter of the additional transistor, and the incandescent lamp is connected in series to the output circuit.

In the drawing, a schematic diagram of the described stabilizer is given.

It consists of a regulating key transistor 1, a saturating transformer 2, and a source 3 of the reference voltage.

4 incandescent lamps, diodes 5 and 6, and an additional control transistor 7.

The on-time of the control transistor 1 is practically determined by the parameters of the saturable transformer 2, and the off-state time is determined by the difference of the reference and output voltages, which provides the stabilization mode. The stabilization factor increases as a result of the amplification of this control difference, the transistor 7 of them due to the energy stored in the transformer 2.

At the nominal value of the load current 8 of the stabilizer, the resistance of the lamp 4 is low and the voltage drop on it is insignificant. With the appearance of a short circuit in the load, the resistance of the lamp

increases dramatically, the voltage drop across it increases and forms a current flowing through diode 5 and the emitter-base junction of transistor 7. The shunting effect of the collector junction of transistor 7 rises,

As a result, the voltage on the winding 9 of the saturating transformer 2 sharply decreases. This leads to a significant increase in the off time of the control transistor 1 and a rapid decrease in

output voltage stabilizer.

Subject invention

A DC voltage regulator containing a regulating transistor, an inductive capacitive filter, a reference voltage source, a saturating transformer with windings, characterized in that, in order to increase the stabilization factor and provide protection against short circuits, it contains

an additional transistor, the emitter-base junction of which is shunted by a series of diodes and incandescent lamps, and the collector-base junction is connected by a diode connected in series with one of the windings of the saturable transformer, and the reference voltage source is connected to the emitter of the additional transistor, and the glow lamp is connected in series into the output circuit.

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