SU1693595A1 - Contiguous dc voltage stabilizer - Google Patents

Abstract

The invention relates to electrical engineering and can be used with so secondary sources of electrical power for electronic equipment. The goal is to increase efficiency and reliability. The device contains N (N 4) regulating transistors connected by collectors to the main and auxiliary power sources 20-23, emitters to the load, bases through resistor mixing circuits to the output of the measuring and amplifying node 19. Switching transistors 5-7 are used for selective switching of regulating transistors opposite type of conductivity, the emitter-base circuits of which are connected to the resistor circuits of the displacement of the transistors 1 - 3, and the emitter-collector circuits of the transistors 5-7 are included among themselves in sequence and in accordance with. As a result, the simultaneous operation of several transistors in a linear mode is eliminated with a simple switching circuit with control transistors 1 sludge.

Description

UNION OF THE SOVIET SOCIALIST REPUBLIC · _<W SU ..,> 1693595 A1

STATE COMMITTEE ON INVENTIONS AND OPENINGS

AT SCST USSR

DESCRIPTION OF THE INVENTION

TO AUTHOR'S CERTIFICATE

(21) 4700455/07 (22) 03.05.89 (46) 23.11.91. Bull. No. 43 (75) I.A. Fokin (53) 621.316.722.1 (088.8) (56) USSR Copyright Certificate No. 983678, cl. G 05 F 1/56, 1982.

USSR copyright certificate No. 583416, class. G 05 F 1/56, 1977.

(54) CONTINUOUS STABILIZER OF DC VOLTAGE • (57) The invention relates to electrical engineering and can be used so secondary sources of power of electronic equipment. The goal is to increase efficiency and reliability. The device contains N (N = 4) control transistors connected by collectors to the main and additional power sources 20–23, emitters to the load, and bases through the mixing resistor circuits to the output of the measuring and amplifying unit 19. For selective switching of the control transistors, switching transistors 5 are used -7 of the opposite type of conductivity, the emitter-base circuits of which are connected to the bias resistor circuits of transistors 1 - 3, and the emitter-collector circuits of transistors 5-7 are connected to each other thoroughly and in accordance. As a result, the simultaneous operation of several transistors in a linear mode is excluded with a simple switching circuit with control transistors, 1 il.

1693595 A1

The invention relates to a gay man in electrical engineering and can be used in secondary power sources of electronic equipment.

The purpose of the invention is to increase the reliability and efficiency of the stabilizer.

The drawing shows a circuit diagram of a stabilizer on four (n = 4) control transistors.

The stabilizer contains the first 1 and subsequent 2-4 control transistors of one type of conductivity, the first 5 and subsequent 6 and 7 switching transistors of the opposite type of conductivity, the main 8 - 11 and additional 12 18 bias resistors, measuring and amplifying unit 19, main 20 and additional 21 -23 voltage sources.

The emitters of transistors 1 to 4 are connected to the output bus, the collectors to sources 20 to 23, respectively. ' The base-emitter circuits of transistors 1–4 are shunted by resistors 15–18, respectively, and transistors 5–7 are shunted by resistors 12–14, respectively. The base of transistors 1-3 through resistors 8 to 10 are connected to the bases of transistors 5 to 7, respectively. The base of the transistor 4 is connected through a resistor 11 to the collector of the transistor 7. The collectors of the previous transistors 5 and 6 are connected to the emitters of the subsequent 6 and 7 transistors. The emitter of the transistor 5 is connected to the output of the node 19, the control inputs of which are connected to the output and common buses, Power. Node 19 can be carried out by the total * voltage of sources 20 - 23.

Resistors 12 - 13 are selected from the condition of ensuring the magnitude of the voltage drop for others (at a rated load current and a minimum gain of transistors 1 - 4) less than the threshold value of the opening voltage of transistors 5 - 7. Resistors 8-11 can be selected with equal resistors 12 - 14. Resistors 15-18 are used to bypass the reverse collector currents of transistors 1 to 4 to prevent their spontaneous opening.

The stabilizer works as follows.

At maximum voltage values of sources 20 - 23, transistor 5 and subsequent transistors 6 and 7 are closed, since the voltage drop across resistor 12 is not enough to open transistor 5. Consequently, transistors 2 - 4 will also be closed, and transistor 1 will be set using node 19 output voltage. As long as the voltage across transistor 1 exceeds the saturation voltage, until the control current of transistor 1 is insufficient to create a voltage drop across resistor 12 that would exceed the base-emitter threshold voltage of transistor 5. As soon as the voltage of source 20 decreases to the value at which transistor 1 goes over into saturation mode, then the decline in the output voltage begins. This causes an increase in voltage at the output of node 19, at the massacre 12, As a result, transistors 5 and 2 open. Now stabilization of the output voltage is carried out using transistor 2 from the total voltage of sources 20 and 21. At minimum voltage values of sources 20 - 23, transistors 5 are open , 6, 7, and 4. Transistors 1–3 are not involved in the operation, since with the help of decoupling diodes included in the collector circuits of transistors 1–3, they are disconnected from sources 20–22, whose voltage is less than the rated value of the output voltage tions, which in this case is maintained at a predetermined level via the transistor 4.

Thus, in comparison with the known, the proposed stabilizer has higher efficiency and reliability due to the exclusion of the operation of two or more regulating transistors. linear mode with a simple switching circuit of regulating transistors.

Claims (1)

Claim A continuous DC voltage stabilizer containing η control transistors, the emitters of which are connected to the output bus., The collector of the first and subsequent control transistors is connected to the input buses to connect the main and additional voltage sources, the base to the first terminals of the main bias resistors, p-1 commuting transistors, measuring and amplifying unit, the control inputs of which are connected to the output and common buses, characterized in that, in order to increase reliability and efficiency, additional bias resistors are included, connected in parallel to the base-emitter circuit of regulating and switching transistors of the opposite type of conductivity, while the second terminals of the main bias resistors, except the last, are connected to the bases of the switching transistors, the collectors of the previous switching transistors are connected to the emitters of the subsequent switching transistors, the collector of the last switching the transistor is connected to the second terminal of the last main bias resistor, and the emitter of the first commutator the transistor is connected to the output of the measuring amplifier unit.