SU1571562A2 - Dc voltage stabilizer - Google Patents

Abstract

This invention relates to electrical engineering and can be used as a secondary power source. The goal is to extend the range of output current from nominal to zero. A regulator element 13 is inserted into a stabilizer containing a power transformer 1, a booster transformer 6, diodes 2-5, a transistor 10 and a feedback amplifier 12. the transistor 10 and the output of the amplifier 12. This expands the range of variation of the output current. 2 hp f-ly, 3 ill.

Description

1

The invention relates to electrical engineering, can be used as a secondary source of electrical power and is additional to the author. St. And 860026.

The aim of the invention is to extend the range of output current from nominal value to zero.

FIG. 1 shows a functional diagram of a constant voltage regulator; Fig. 2. 3 current, an embodiment of the regulating element.

The DC voltage stabilizer (Fig. 1) contains a power transformer 1, the secondary winding leads of which through diodes 2-5 are connected to the windings of a booster transformer 6, the secondary windings 7 of which are connected by an average lead through the filter choke 8 to the output terminal, the primary winding 9 of the transformer 6 through the collector-emitter circuit of the transistor 10 is connected to the output terminal, and through the capacitor 11 to the common output, the feedback amplifier 12 is connected to the common and output terminals, and the output from the bases oh transistor 10 and the input of the regulating element 13 connected between the output and common pins of the stabilizer.

The stabilizer works as follows.

in a way.

In the stabilization mode, at the nominal output current of the stabilizer, the base-emitter transistor 10 transforms from the output of the feedback amplifier 12 and a release voltage is applied to the base-emitter transition of the transistor 14 (Fig. 2, 3} blocking voltage, therefore the transistor 14 will be closed . When the stabilizer's output current decreases, the transistor 10 closes and it can no longer control the output voltage, so the output voltage will increase, the feedback amplifier will work and the base-emitter of the transistor 14 (Fig. 2.3) will switch to blunt unlocking voltage.

Transistors 14 (Fig. 2) or 14 and 15 (Fig. 3) will open and additional current, defined by resistors 16 (Fig. 2), will flow through the stabilizer.

or 17 (Fig. 3) and the voltage drop across the transistors 14 (Fig. 2) or 14, 15 (Fig. 3). The output voltage of the stabilizer will be stabilized,

When the output voltage of the stabilizer decreases (as the load current increases), the transistors 14 (Fig. 2)

or 14, 15 (FIG. 3) are closed, and

transistor 10 will open. The stabilizer returns to the initial state. When using an operational amplifier as feedback amplifier 12, the output voltage of the stabilizer may vary by a small amount (less than +10 mV).

The use of a regulating element in the proposed stabilizer circuit provides new properties of the stabilizer, namely, the range of variation of the output current of the stabilizer is maximally expanded. Such a stabilizer can be used.

5 without limiting the change in output current from zero to the nominal value.

The prototype device can be used only in equipment where there is no change in the output stabilizer down to zero, since it cannot operate at an output current equal to zero.

This stabilizer can operate in a wide range of variation of the output current, including when the output current of the stabilizer varies from zero to the nominal value.

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Claims (3)

1. DC Voltage Stabilizer St. V 860026. characterized in that, in order to extend the range of output current from the nominal value to zero, a control element is connected to it, connected by power terminals between the common and output terminals and the control terminal, connected to the base of the main transistor. 2, the stabilizer according to claim 1, characterized in that the regulating element is made on a resistor and an auxiliary transistor with the opposite type of conductivity with respect to the main transistor, the emitter of the auxiliary transistor connected to the output terminal do, collector in the cage: the resistor - to the common conclusion, and the base is connected to the base of the main transistor. 3. Stabilizer according to claim 1, which is based on the fact that the regulating element is made on a resistor and two transistors of the opposite conductivity type, and the base is trans-5715626 a resistor with a conductivity, the counter-false conductivity of the main transistor, is connected to the base of the latter, the emitter is connected to the output terminal, and the collector is connected to the base of the second transistor, the emitter of which is connected to the common terminal, and the collector through the resistor to the output terminal.