SU1283730A1 - D.c.voltage stabilezer - Google Patents

Abstract

The invention relates to electrical engineering, in particular to sources of secondary power supply. The purpose of the invention is to expand the range of output voltage control. The overall gain of the comparison unit 12, the matching unit 13, and the key 14 is chosen such that throughout the entire range of allowable output voltages, the key 14 is in saturation. The relay coil 10, when the output voltage of the reference voltage of the unit 8 of the reference voltage exceeds, will be at a voltage equal to the input voltage of the device. Introduction to the current limiting resistor 15 removes the buzzer. The reference voltage unit 8 forms the boundary voltage defining the response threshold of the comparison unit 12. The introduction of the matching unit 13, which operates in the relay of the output amplifier of the comparator unit 12, provides the input current sufficient for opening the key 14 at the lower limit of the change in the output voltage of the device. 1 il. S cl

Description

divider 2, then when the collector - of the transistor 1 fails, or if there is no connection between the collector of transistor 1 and terminal 16, the following situation occurs. The voltage from the midpoint of the divider 2 20 through the diode 4 and the base-emitter junction of the transistor 1 is fed to the signal input of the comparison unit 12. Last

f5

A DC voltage regulator containing a regulating transistor connected in sequence, contacts 11 of the relay are closed, the voltage on the signal input to one of the power busses, two de comparison units 12 are reduced, resistive voltage dividers, the input

the first of which is connected to the terminals for connecting the primary power source, and the input of the second with 30 terminals for connecting the load, two isolation diodes connected by one electrodes to the base of the regulating transistor, an error signal amplifier, a signal

pins 11 of the relay soften and the process repeats. In the presence of a resistor t5, this situation does not occur, since the voltage on the comparison unit 12 when the collector transition fails at the collector transition. 1 or in the absence of a connection between the collector of transistor 1 and terminal, 16 comes from the midpoint of the divide-35 ° of which is connected to the second voltage output, one arm of which voltage divider, the reference is formed by a resistor 15, diode 4 ° of the first block of the support- and transition of the base-emitter of the transistor voltage, and the output potential-1, and the second arm is the deli-terminal output with another electrode

4Q of the first isolating diode, an auxiliary voltage source, connected via the closing contacts of the relay between the terminal for connecting the potential output of the load and a-. potential supply terminals of the error signal amplifier and the first reference voltage unit, characterized in that.

3. It is possible to select the divider 15 such that the voltage at the signal input of the comparison unit 12 in this situation is less than the reference voltage of the unit 8, and the relay will not operate. At the same time, with a good transistor 1, its input resistance is much greater than the resistance of divider 3, the voltage drop across resistor 15 is small, the voltage from the output of divider 2

45

in order to expand the range of regulation

sufficient to open the key 14, the input current at the lower limit of the change in the output voltage of the stabilizer.

Claims (1)

Invention Formula A DC voltage regulator containing a control transistor connected in series to one of the power rails, two resistive voltage dividers, in electrodes to the base of the control transistor, the error signal amplifier, the signal ° of which is connected to the output of the voltage separator, the reference ° “by the sensor of the first voltage-generating unit, and the output potential –dial output — to another electrode 4Q 45 in order to expand the range of regulation is transferred to the base of the transistor 1 by poking the output voltage, in tn completely, the unit 12 comparison "he entered the second block of the reference relays are triggered. current limiting resistor The unit 8 of the reference voltage of the form-supplying inputs of the second unit supports the boundary voltage, a certain -55th voltage and a comparison unit The operating threshold of unit 12 is compatible with the terminals for connecting the unit. The value of the boundary voltage can be selected in a wide range, determined by the design of the primary power source, the signal input of the comparator is connected to the terminals for connecting connected to terminals for connecting primary power source, the signal input of the comparison unit is connected to the terminals for connecting 5 12837306 „Load, and the reference input is from the comparison output unit, and the current limiting of the second reference voltage unit, the resistor is connected between the output : the relay coil is connected to the terminals of the potential output of the first delay of connecting the primary voltage source and other electrits through a key that controls the input j with the second separator which is connected to the output circuit, a diode.