SU1335963A1 - Stabilized d.c.voltage source - Google Patents

Abstract

The invention relates to electrical engineering and can be used to power devices having the pulsed nature of consumption currents. The purpose of the invention is to increase the efficiency over the entire load current range. Connecting the bias resistors 10, 11, 12 to one of the terminals of the switch 14 allows, at load currents less than or equal to the critical value, the bias current of the LC filter 3 passes through the bias circuits. Therefore, the currents through the auxiliary circuits of the device are halved. At load currents greater than the critical value, the bias circuit is de-energized. The additional current consumed is determined only by the high-resistance circuits of the stabilizer 4 and the resistor 19 in the base circuit of the transistor 14 of the switch 13. The magnitude of this current is very small compared to the bias currents of the matching transistors 7.8 and 9 of the regulating element 5. 1 sludge. (L 00 with JV CD ot with

Description

Mostly, it is related to electrical engineering and can be used to supply power to devices that have a pulse type of current consumption.

The purpose of the invention is to increase the efficiency in the whole range of variation of the load current.

The drawing shows an electrical power supply circuit diagram.

The stabilized power supply contains a transformer Ij rectifier 2, .LC-filter 3, stabilizer 4 constant voltage with a series regulating element on the composite transistor 5 with passage 6 and according to them 7-9 transistors, the emitters of which are connected by one with the resistors 10 - 12 bias, electronic shunt 13, the switch 14 of which is connected to the common bus 4 of the first stabilizer 5, and the second 16 to the other terminals of the resistors 10-12. The switch 14 is a composite transistor, the input circuit of which is under Connected to the collector of the transistor 17 of the sensitive element, which also includes a sensor 18 to load and a resistor 19 that sets the base current to the switch 14. This embodiment of the electronic shunt does not exclude other options: as a switch a thyristor or a relay is used, and a differential circuit is used as a sensitive element.

These options do not affect the achievement of the goal, and are determined by the required accuracy of the shunt threshold, the scarcity of radio elements and other factors.

The stabilized constant voltage source operates as follows.

In the load current range from O to IHKD, the voltage drop across the sensor 18 is not sufficient to open the transistor 17, and the switch 14 of the electron tune 13 is saturated, because the current specified by the resistor 19 enters its base circuit. 9 of the regulating element 5 are in the zone of stable operation in the whole range of temperature variation, which is ensured by the passage of currents

+ capacitor

the bias across the circuits: LC filter 3, collector-emitter junction of matching transistors 7-9, bias resistors 10-12, electronic shunt switch 14 13, LC filter capacitor 3.

It also ensures the absence of overvoltages at the input of the stabilizer 4, since the displacement currents, the total value of which is 5-10% of 1, reliably load the LC filter, and it operates in the continuous current biasing mode

all range of changes 1 „.

When I j IHXD the voltage drop across the resistor 18 becomes sufficient to saturate the transistor 17, the base circuit of the transistor 14 is provided and the bias currents through the matching transistors 7-9 are reduced to O. because

currents I., matching transistors

 ABOUT

are compensated by the load currents directed against them.

Thus, in the proposed technical solution, the following advantage is achieved: in the mode of load currents smaller than 1 c, the current of the matching transistors of the control element passes through the input reactor choke.

stabilizer, that creates a gain in efficiency over the entire range of 1c. At 1 c bc, the bias current of the throttles of the C filter passes through the bias circuit, so that

the currents through the auxiliary circuits of the device are reduced by 2 times; at IH iH.kp, the circuits are reliably de-energized, and the additional current consumed by the device is determined

only by the high-voltage circuits of the stabilizer 4 and by the resistor 19, the magnitude of this current is negligible in comparison with the bias currents of the matching transistors.

50

F o

rmula of invention

A stabilized DC voltage source containing connected between the terminals for connecting the 55 DC input voltage source and the terminals for connecting the load is a series-connected LC filter and a DC voltage regulator with a series 13J5963

one of the outputs of a communing transistor with N (where NI, an electronic key is connected 2, ..,) matching transistors, to a common bus, differing in an electronic shunt performed on a comm that, in order to increase the efficiency in the mutator and the sensitive element, the whole range of load current and N bias resistors, one of you, the other terminals of the bias resistors of which are connected to the emitter, are connected to the second matching signal mutator electron about key.

Claims (2)

Claim A stabilized DC voltage source, containing an LC filter and a DC voltage stabilizer with a sequential regulating element on a composite transistor with N (where N = I, 2 ,. . .) Matching transistors, electronic shunt configured to com- Mutator ₅ and the sensor element, and N bias resistors, one of the terminals of which are connected to the emitters of the respective matching tranzis tori, wherein one of the terminals of the electronic key switch is connected to the common bus, wherein that, in order to increase efficiency over the entire range of changes in the load current, the other terminals of the bias resistors are connected to the second terminal of the electronic key switch.