SU1372298A1 - D.c. voltage gate stabilizer - Google Patents

Abstract

The invention relates to electrical engineering and can be used in secondary power sources. The purpose of the invention is to increase the efficiency and reliability of the key stabilizer. The key stabilizer consists of a power regulating transistor 2, an LCD Filter 3, a generator (SG) 5, a modulation unit 6, which includes a feedback amplifier 7, a comparator 8, a saw voltage generator 9, a driver 10 pulses. An additional winding 23 is inserted into the output transformer 24 SG 5, the extreme leads 25 and 26 through diodes 27 and 28 are connected to the extreme leads 13 and 14 of the output winding 15 of the transformer 16 of the driver 10, and by the middle point 19 to the control circuit of the transistor 2. Voltage generated at the control input of transistor 2 is two-pole, which means that the dissolution time of transistor 2 is reduced, which leads to a decrease in switching losses at the moment of locking and to a decrease in overheating of transistor 2, thus increasing the efficiency and reliability of izatora. 3 il. (L

Description

with to

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fig 1

G (1 |) .1 I pi.choartiogue about voltage and with e - i Hiixo; n 1 and: 1 is the same voltage i. i UiHpeNk NPO C: a signal of the return St. -) | amplifier 7 is supplied to the comp-1G; jM 1 op 8.: the output of the comparator 8 pr - T-.Ch1-, I Ugg MT) I1 U. pulses (Fig. 26) with a measurement of I P system with a duty cycle of 1-1 mg / h of feedback, 1 H, h, and. -MP of the imager 10, is transformed, with the joint venture f:; 1pl.oiatepsm and on the output winding 15 of the transformer 16 arises. - G1M-: G.M. (.: Yn (e voltage with a pause at zero-I n on the porosity varying syn-: 1 i; hg.ing.ng GS GS the importance of the output voltage of the voltage of the comparator 8.

: i li r ii,: (tint. 2a shows a diagram for i4-., Koi.i {fi НЯ output winding 23 of trans. -TOR i lOp-.taTopci 2) of the master oscillator 5;

vri. (I ii; i Ji ir. Pu - / isn rmma voltage

, one-.,; | j | .i; -: 1 city ui (lOMOTKe 13 transformer 16 .. m11gon, -gel 10 modulation block.:.

- about - . The time delay for example - I T (. at 1m, 1ho; e 25 windings 23 trance SP, .1 of torus 24 has a positive I – –1; h hand of Brig. 2a) and a positive

:, |; -:.,; г1, and лрннсс on winding 15 transformersjipiMiI. i In (| 1irg.p1) ovat (; 1 10. At the same time, ditHi, 1, .8 o} azytsasts in locked state 1 or, since the voltage of the winding is 15

.- -if ii. ;;, B1 with 1 and 13 and 19 higher or equal

. 1i1 |; 1ntinh H) winding 23 between pins ib p 29. Positive voltage

III., M ode 13 (shown in Fig. 1 without

  I,,. (. PC: (1kami -I- and -) windings 15 through. 1 ;; 1m; -,: meteor diode 17 and limited ii TcijbuijM resistor 20 is applied to the transistor 2 Wiranp

2d). Transistor 2 is open and on them.) DL 1L) -f11ltra voltage iii: 1 very low power supply (Fig. 2e), filter-, oks and goes to the load 4. .. |; 1) ti example for example on the path. M iiKt 15 1 of the transformer 16 of the formation of Sel4 1.) becomes equal to zero. In the cult of the diode 27, included in the pr YM on the graph in relation to the entrance P, h; : 1Ai of the transistor 2, I open. 11оЛ1) Ж1Ггельный voltage on pin 25

.1); (same1 (no inspection of 23 through direct i ims; tsep1, sh dio, h 28 and de-energized around iTixy 5, through the middle point 19 when-,: biBcio H I K. i 1..11) human body 22,

P X IPrha fjij.Hoe 11a1) averaging an average of 8 1.11 29 I OMixrKii 23 is applied to -l.1. CHK (.1neni | restrictive river r .iii. I 2 (1 i V right and. | D) 1H1tseg: electrode 1 r:; j.J5ii. - ti, t. F. On the management of the control transistor 2 in the interval time t ,, - t, a blocking voltage is applied from the control circuit (Fig. 2c). This causes the accelerated resorption of minority carriers from the base area, which prevents a sharp increase in current through the collector junction of the transistor at the time of changing the polarity of the voltage on the winding of the choke of the LCD filter 3, which is equivalent to the short circuit mode at the output of the transistor 2. Switching These losses are reduced.

The regulating transistor 2 is closed and at the input of the LCD-fi ppra 3 - on its regenerative diode the voltage becomes zero (Fig. 2e).

At time t, the voltages on the windings 15 and 23 change the signs shown in FIG. 1 in brackets and in FIG. 2a, c. Diode 28 is locked because the voltage of the winding 15 between pins 19 and 14 is higher or equal to the voltage of the winding 23 between pins 26 and 29. The positive voltage of the output 14 of the winding 15 is supplied through the limiting resistor 20 to the control electrode of transistor 2 (Fig. 2d ). In the same way in the time interval t, -t ,, as in the time interval

,, control transistor 2 key stabilizer open.

Similarly to the described process in the time gap t, -ts in the intervals, tj-tg, i.e. at the time of the occurrence of a pause at zero in the control voltage of the winding 15 of the driver 10, the transistor 2 of the key stabilizer is closed. In another case, when an output voltage appears on the winding 15 of the driver 10 of the control pulses, namely

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Sistor 2 is open.

During the operation of the key DC voltage stabilizer, the pulse voltage (fig. 2e) acting on the input of the LCD filter 3 is integrated by the filter and stabilizes within the limits determined by the elements of the feedback amplifier 7.

Thus, the control voltage created at the control input of the control transistor 2 of the key stabilizer using the proposed circuit is two-pole. With the occurrence of a locking voltage

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20 25

35

40

45

to the composition of the upranch of the impaired sig.chm of resorption of the trapcrrcdcrc, which leads to the beginning of the 1PHR-p -oio-1u reduction of the commutation iioropi, at the moment of locking, and, as with, and; overheating of the regulating transistor is increased, the OIL and the stabilizer reliability increase.

The proposed device can be used in the control circuit of a network transformerless stabilized converter (FIG. 3). The device does not require the installation of an additional discrete elements in the control circuit of the control transistor — low-power transistors, capacitors, etc. — that are exposed to non-stationary processes in the network during operation, since these elements are connected to the control input of the power control transistor and are complex impedance the installation (capacitance (installation, insulation resistance) is connected to the network.

The proposed stabilizer, unlike the known one, is not limited to the form of a control voltage with a pause at zero (Fig. 2c, k). At the output windings of the transformer of the master oscillator and the former, rectangular-shaped voltages with a duty cycle of two (Fig. 2a, l) are displaced during the process of adjusting} P1 one with respect to the other by angle). As a result of the addition of the indicated voltages with the help of the proposed device, the resulting bipolar voltage similar in form to the voltage on the diagram (fig.2g, m) will act at the input of the upranl (P1 regulating transistor (Fig. 2m).)

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The master oscillator and driver diodes 27 and 28 (Fig. 1) are sanepTi.LMii and the control input of the regulating transistor is triggered by a switch of the two half-pers peri I Itel I in di 1) dah 17 and 18. Reg. .

In time intervals t, .- r ,, t, -t. (Fig. 2a., m) pg) from 4 b

Phase of the indicated voltages) these voltages, warehouse1,1va with ь in series, are fed to the HX .vH up-111E1P1

51372298

of the control transistor in the chagrai - en 1 (.1 polarity and the transistor is locked, orm in l and invented

1) s t x nor o tok with s and n it is kry us 5 yes and you will be able to see

A key DC voltage regulator containing a series-connected power regulating transistor and an LCD Filter between input and output pins, a master oscillator, a modular unit consisting of a sawtooth voltage generator, a comparator and a feedback amplifier, and the generator output A sawtooth voltage is connected to the first input of the comparator, the second input of which is connected to a feedback amplifier connected to the output pins, and the output of the comparator is connected to the first input of the driver channeling constituent pulses, the second input of which is connected to the first output generator, WTO

1) the output of the connected to the sawtooth voltage generator, the output winding of the transformer of the driver for controlling the pulses of the extreme terminals through the rectifier and the limiting resistor are connected to the control electrode of the regulating transistor, which, in order to increase the efficiency and reliability of the stabilizer, an additional winding was introduced into the output transformer of the master oscillator, the terminals of which through the inserted diodes are connected to the extreme terminals of the output winding of the transformer tel control pulses, and the average point - to the control electrode of the transistor regulator, rectifier control pulses shaper configured for push-pull circuit to a midpoint which is connected to the power regulating electrode of the transistor.

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Claims (1)

Claim A key stabilizer, DC voltage, containing a serially connected power regulating transistor and an LCD filter between input and output terminals, a master oscillator, a modulation unit, consisting of a sawtooth voltage generator, a comparator and a feedback amplifier, the output of the sawtooth voltage generator being connected to the first input a comparator, the second input of which is connected to a feedback amplifier associated with the outputs of the outputs, and the output of the comparator is connected to the first input of the driver of the output pulses, the second input of which is connected to the first output of the master oscillator, the second output of the sawtooth voltage connected to the generator, the output winding of the transformer of the control pulse shaper with their extreme leads through the rectifier and the limiting resistor is connected to the control electrode of the control transistor, characterized in that, with In order to increase the efficiency 10 and the stabilizer reliability, an additional winding has been introduced into the output transformer of the master oscillator, the extreme terminals of which are es input diodes connected to give off extreme vyvo15 winding transformer driver control pulses, and the average point - to the control electrode of the transistor regulator, rectifier pulse shaper upravlyayu20 boiling push-pull circuit is configured with a midpoint which is connected to the power regulating electrode of the transistor. fig 2