SU771633A1 - Dc voltage stabilizer - Google Patents

Description

one

The invention relates to electrical engineering and can be used in the power supply circuits of various electronic equipment.

There are known stabilizers of constant 5 voltage 1, 2.

The first of the known devices 1 contains a transistor regulator, a zener diode, an LCD filter, a dc-to-ac converter, a thyristor group consisting of a thyristor and an adjusting element, a resistor, a capacitor, a shunting control input of the thyristor, a measuring organ, an output which is associated with a control input of an adjustable element.

The closest to the technical essence of this invention is a device containing a regulating element on a transistor, the base of which is connected to the anode of the Zener diode, and the emitter - collector junction is connected between the negative input terminal and the input of the LCD filter. The output 25 is connected to the output terminals, kudy is also connected to the measuring device, the output of which is connected to the input of the control element, the first thyristor, the cathode connected to the remote

A valid input terminal, to which one output of the first parallel circuit from a resistor and a capacitor is also connected, a dc to ac converter with a positive winding and an auxiliary winding made with a midpoint, four diodes and resistors 2.

The disadvantage of such a device is the difficulty of obtaining a stabilized voltage close to the minimum input.

Q (5 of the invention is an extension of the range of stabilized output voltages.

Claims (1)

The goal is achieved by introducing a diode bridge, a second thyristor, a second parallel circuit from a resistor and a capacitor, and two control transistors to the DC voltage stabilizer, with the cathode of the zener diode connected to the cathodes of the first diode diode bridge, and the anodes of the second diode diode connected to the additional winding of a DC / AC converter, the midpoint of which is connected to the base of the regulator transistor, the cathode of the second thyristor and one output of the second parallel circuit of a resistor and a capacitor connected to a negative input Clelia "My The control electrodes of the thyristors through respective first resistors to a different conclusion kzhcheny respective parallel circuits of a resistor and a. the capacitor and the emitters of the corresponding control transistors, the collectors of which are connected through the corresponding first to the output winding of the converter pbto n-nogo voltage to alternating, and through the corresponding second resistors to the anodes of the corresponding thyristor alternating current connected to the diagonal of the alternating current of the diode bridge , while the base-collector junctions of the control transistors are shunted by the third resistors, respectively, and the bases are connected to the output of the element through the second second diodes Board, in addition, the output winding, is formed to a midpoint connected to the negative input terminal. FIG. 1 is a schematic of the invention; in fig. 2 - voltage diagrams. The device contains a regulating element on the transistor 1, the zener diode 2, L.CD filter 3,4,5; DC / DC converter 6 to the alternating two thyristor groups (thyristors) 7, 8, capacitors 9, 10, resistors I, 12, shunting inputs of thyristors, / control element 13; the measuring body 14, the output connected to the input of control element 13, transistors 15, 16, whose collector-base transitions are bridged by resistors 17, 18, the bases are connected via diodes 19, 20 to the control element, and the collector through resistors 21, 22 to thyristor anodes 7, 8 and through diodes 23, 24 to the terminals of the transformer winding of converter 6; 25–28 diode bridge connected by a positive lead to the Zener diode 2, an alternating current input to the thyristor anodes 7.8, and the additional winding taps of the converter 6 are connected to the gap of the anodes of the minus lead, the middle point of the additional winding is connected to a common point, the combined cathode is stable to the throne 2 and the base of the transistor 1. The middle point of the output winding, the cathodes of the thyristors 7, 8 and the emitter of the transistor 1 are connected to the minus of the power supply. The device works as follows. When the device is connected to a power source (Fig. 1), a constant-voltage-to-AC converter 6 is started, the voltage on the motor of which the Unp transformer has, and (see. Fig. 2). In sections O, or tj - i%, capacitors 9 or 10 are charged, respectively. In these sections of transistor 1, the output of the transfer winding of the mater along the circuit is open: winding -diode 23 (24) -resistor 21 (22) -diode 26 (25) -stable2-emitter-base of transistor (1) - minus the power supply. At times {, - and -b, depending on the voltage at the output of the stabilizer, controlled by the meter Hbavi by the body 14, through the control element 13, the transistors 15, 16 turn on the thyristor 7 or 8, which shunts the base-emitter: transistor 1 transition and zener diode 2. at these times, the transistor 1 is locked by the voltage of the additional winding of the transformer through the diodes 27, 28 and thyristors 7.8 and is in the closed state at intervals t - -fc 2 and -1 -, - ,. In this scheme, it was possible to use one measuring element 14 and one control element 13 for controlling two thyristors. This is possible with PSD diodes 19, 20. In the circuit, both half-periods of the output voltage are used and the segments can be changed from zero to half-time of the converter voltage, which allows to adjust the output voltage from zero to the minimum input. Thus, the proposed scheme makes it possible to stabilize any voltage across the load, increase the power of the sources, and is the simplest in comparison with other analogues and prototype. Claims The DC voltage regulator contains a regulator on a transistor, the base of which is connected to the anode of the Zener diode, and an emitter-collector junction is connected between the negative input terminal and the LCT3 filter input, the output of which is connected to the output terminals, where the input of the measuring organ is also connected, the output of which is connected to the input of the control element, the first thyristor, the cathode connected to the negative input terminal, where one output of the first parallel circuit from the resistor is also connected to capacitor, DC / AC converter with output winding and additional winding. a midpoint, four diodes and resistors, characterized in that, in order to expand the range of stabilized output voltages, a diode bridge, a second thyristor, a second parallel circuit from a resistor and a capacitor, and two control transistors are inserted in it, the cathode of stabilizer connected to the cathodes of the first pair of diodes of the diode bridge, and the anodes of the second pair of diodes with