SU1339799A1 - Pulsed d.c. voltage regulator - Google Patents

Abstract

The invention relates to electrical engineering and can be used in sources of secondary power supply, as well as in electric drive systems. The purpose of the invention is to increase efficiency and reliability. The device contains three series circuits, including / 5 in a definite way between the input, output, and common terminals for connecting the DC voltage source 18 and the load 21, respectively. Serial circuit 1 includes a key element 2 and a reverse diode 8 connected to it through the first winding 3 of a multiple winding current-limiting transformer 4. Key element 2 is bridged by a circuit from capacitor 13 and diode 14. A second series circuit consists of transformer winding 10 4 and the winding 11 throttle 6 and is connected in series with the first circuit. The third series circuit consists of a winding 16 of a transformer 4 and an auxiliary diode 15 connected to the connection point of a capacitor 13 with a diode 14. The free leads of the key element 2, the windings 11 and 16 are connected to the input, output and common pins respectively. The auxiliary winding 5 drossel 6 is included in the first serial circuit. 6. The introduction of the third serial circuit and the specified Master; 1 LAJ. I (C (L z with co with co; o Figure 1

Description

the inclusion of the auxiliary winding 5 eliminates overvoltages on the key element, ensures the recovery of the energy accumulated in the capacitor shunting the key element to the power supply. With this og1

The invention relates to converter equipment and can be used in sources of secondary power supply for electronic equipment, as well as in electric drive systems.

The purpose of the invention is to increase the efficiency and reliability of a DC voltage pulse regulator.

Fig. 1 shows a DC voltage pulse regulator; in fig. 2-6 - various modifications of the controller circuits; Fig. 7 shows time diagrams of currents and voltages in a pulse controller.

The device contains the first branches

1 consisting of a key element

2, the first winding 3 of the multiple-winding current-limiting transformer 4 and the auxiliary winding 5 of the throttles 6, the second branches 7 formed by the main diode 8, and the third branches 9, which include the second winding 10 of the multi-winding current-limiting transformer 4 and the main winding 11 of the throttles 6. The auxiliary diode 12 is connected to the junction point of key element 2

with a winding of 5 throttles 6, a shunt series circuit from capacitor 13 and diode 14 is connected in parallel to key element 2, and a common circuit from an additional diode 15 and third winding 16 of a current limiting transformer A is connected to the common point of the capacitor 13 and diode 14; throttle 17 can be included both in the first branch 1 and in the second branch 7,

The power supply 18 (Fig. 1) is connected to the output 19 of the first branch 1 and to the output 20 of the second branch 7, and the load 21 to the output 20 of the second wind voltage on the key element 2 can be detected at the voltage level of the power source the voltage level at the load, as well as at the level of the sum of the indicated stresses, 7 Il.

7 and to conclusion 22 of the third branch 9, FIG. 2, power supply 18 is connected to terminal 22 of the third branch 9 and to terminal 19 of the first branch 1, and to load 21 to terminal 20 of the second branch 7 and to terminal 19 of the first branch 1 According to the diagram of FIG. 3, power supply 18 is connected to terminal 19 of the first branch.

Q 1 and with the output 22 of the third branch 9; The same output is connected to the load 21, in which the second terminal is connected to the output 20 of the second branch 7, the load 21 can be as active,

C, and active-capacitive nature,

In the diagrams of FIGS. 4-6,

also completely identical branches,

the first pins connected between

yourself and include key

„Element 2, the first winding 3 current

the transforming transformer 4, the first branch 1 with the output 19; main diode B and auxiliary winding 5 droplets 6 - second branch 7 with high water 20; the second winding 10 of the current-limiting transformer 4, the main winding I 1 throttle 6 - third branch 9 with pin 22, Similarly to the first three circuits connected

Q capacitor 13 and diode 14 of the shunt series circuit, additional diode 15 and winding 16 of the current-limiting transformer 4, additional choke 17,

The application of one circuit or another is determined by the task at hand when designing the device. So, if a down-regulating impulse controller is required, then the circuit shown in fig. 1 or fig. 4 should be used. If an incremental pulse regulator is required, then the circuits of fig. 2 or 5 are used. Finally, to obtain an inverted voltages are subject to circuit im5

0

pulse regulators shown in FIG. 3 and in FIG. 6. A positive effect in the proposed DC voltage regulator with all power supply and load connection options is achieved by the same means — the indicated connections, auxiliary diode 12, auxiliary winding 5 droplets 6, auxiliary diode 15, third winding 16 current line - siphoning transformer 4, additional droselsel 17.

The circuits according to phy I 1 and 4, according to fig. 2 and 5, in FIG. 3 and 6 perform the same functions, and from the point of view of the increase in reliability and reliability, they are equivalent. The need to use any scheme from the corresponding pair is determined only by secondary reasons — the convenience of constructive execution of the windings of the throttles 6, the location of the elements on the real layout, etc.

A DC voltage regulator (Fig. 1) operates as follows.

By the time the key element 2 is unlocked, the core of the current-limiting transformer 4 is demagnetized, the auxiliary diode 12 is closed, the capacitor 13 is charged before the voltage of source 18 with polarity indicated in brackets, i.e. ,, and the current of the throttle 6 flows through the circuit: load 21 - the main diode 8 - the second winding 10 of the current-limiting transformer 4 - the main winding of the 11 throttle 6.

At the moment of time to (Fig. 7), the key element 2 is turned on and the voltage on it j drops to zero. During the resorption time, the diode 8 remains in its conductive state and the first winding 3 of the transformer 4 is applied with the voltage indicated in FIG. 1 without brackets. The process of magnetization of the transformer core 4 begins, and it follows from the law of total current that, H-1, where i is the current of the key element 2; i. - current drossel 6; with,, with ,,,, - the number of turns of the windings 3 and 10 of the transformer 4; H is the magnetic field strength; 1 - the length of the midline of the core. Consequently, the current of the key element 2 is equal to 1: 1co, g / Oz + H-I / CO, and in relation to the current of throttles ij, i.e. a fact

five

0

five

0

Tically to the load current, can be selected at any desired level. Thus, transformer 4 effectively limits the amount of current through key element 2 and completely eliminates through-current emissions. Obviously, the current through the key element 1 must exceed the throttle current ij, only under this condition the reverse current flows through the diode 8 and it begins to lock. For this, it is necessary that the number of turns of the winding 10 of the transformer 4 either exceeds the number of turns of the winding 3 or is equal to it. In the latter case, the diode 8 is locked only by the magnetizing current of the winding 3, equal to Н 1 / СдЗ,. Auxiliary LED 12 and an additional 15 diodes continue to remain in the off state (voltage polarity without brackets on the third winding 16 of transformer 4), and energy is accumulated in magnetizing inductance of transformer 4.

At time t, the process of locking the main diode 8 ends and the current through it drops to zero. Transformer Core 4

the action of magnetized, counter-included in which flows

it turns out that the two windings 3 and 10 are energizing,

0

five

current i throttles 6. Since the number of turns of the winding 10 exceeds the number of turns of the winding 3 or, at least, is equal to it, the magnetizing inductance of the transformer 4 is discharged and the voltage on its windings changes its sign (polarity in brackets). Under the action of this voltage, a diode 15 is opened, through which a current flows, which discharges the capacitor 13 to zero. From the diagram in FIG. 1 that this current flows only through the power source 18 and therefore the discharge of the capacitor 13 does not cause any increase in the current through the key element 2. If the voltage on the capacitor 13 decreases to zero before the magnetization inductance of the transformer 4 is discharged then the diode 14 will open and the rest of the energy will be recuperated to the load 21, and the current through the key element 2 will even decrease.

5 The discharge process of the magnetizing inductance ends. Further, the diodes 8, 12, 14, -15 are closed, and the current of the drossel 6 flows from the power source 18 through the key element

2, auxiliary winding 5 droselsel 6, through the windings 9 and 10 of the transformer 4.

At time t, the key element 2 is locked by the action of the control signal and the current through it drops to zero. The throttle current 6 opens the diode 14 and begins the process of charging the capacitor 13 with the polarity indicated in FIG. 1 in brackets. At time t, the voltage on the capacitor 13 reaches the value of the voltage of the power supply source 18, the auxiliary diode 12 and the main diode 8 open. The throttle current 6 is closed in the circuit: load 21 - auxiliary diode 12 - additional choke 17 (if this throttle switch is on in the first branch 1) - auxiliary winding 5 droplets 6 - windings 3 and 10 of transformer A. In this case, the voltages on the windings I1 and 5 of the chokes 6 change their sign (the polarity of the voltage in FIG. 1 is shown in parentheses). The throttle current 6 at the first moment cannot flow through the main diode 8, since if the additional choke 17 is turned on in the first jet 1, then the current of this choke should be reduced to zero, or if the choke 17 is turned on in the main diode 8 in the second branch, the current in this choke should rise to the current of the choke 6, Under the action of the voltage on the winding 5 of the choke 6, the current in the additional choke 17 begins to decrease when this choke is in circuit 1, or increase when the choke 17 in circuit 7, wherein the current through diode 8 increases approximately. linear law, and through diode 12 in the same way decreases.

At time tj- the current through the auxiliary diode 12 reaches and it is locked by the voltage on the auxiliary winding 5 droplets 6, until the key element 2 is unlocked, the current of the chokes 6 is closed along the circuit: load 21 - diode 8 - choke 17 (if this choke is included in the main diode 8) circuits - the winding 10 of the transformer 4, while the core of the transformer 4 is maintained in a demagnetized state. At time t, key element 2 is unlocked and then the processes in the circuit are repeated.

The processes in the control circuits of FIGS. 2 and 3 are not fundamentally different.

from the processes in the controller of FIG. 1. The capacitor 13 in the regulator of FIG. 2 is charged to the voltage level at the load 21, and in the regulator of FIG. 3 - to the total value of the voltage of the power source 18 and the load 21,

In the device of FIG. 4, the processes in the circuit are completely similar to the processes in the regulator circuit of FIG. 1, which correspond to the timing diagrams in FIG. 7. The processes in the device diagrams of FIGS. 5 and 6 are similar to the processes in the diagrams of FIGS. 2 and 3 respectively.

Thus, in the proposed DC voltage regulator, overvoltage at the key element is eliminated, energy accumulated in the shunting key element of the capacitor is recovered to the power supply. All this makes it possible to increase the efficiency and reliability of a DC voltage pulse regulator.

Claims (1)

Invention Formula A DC voltage regulator containing input, output, and common leads for connecting a DC voltage source and load, respectively, a key element stitched with a series-connected capacitor and auxiliary diode, a reverse diode, a choke with main and auxiliary windings, and a multiple-winding current-limiting transformer , the key element and its connecting pin through the first winding of the multiple-winding current-limiting transformer reverse diode form the first serial circuit, the second serial circuit formed by the second winding of the multiple winding current-limiting transformer and the main winding of the choke, is connected to the first serial circuit at the junction of the first winding multiple winding current limiting transformer and reverse diode, the first output of the first series circuit, forming the electrode of the key element and the capacitor terminal, not connected to the auxiliary diode, are connected to the input terminal, the circuit section between the second terminals of the first and second swarms of serial circuits connected; between the common terminal and the output terminal., characterized in that, with efficiency and reliability, a third series circuit is additionally inserted from the discharge diode and the third winding of the multi-winding current-limiting transformer connected between the common point of the capacitor and the auxiliary diode and the common terminal, and The auxiliary winding of the throttle is connected sequentially in the first serial circuit. FIG. 2 12 15 . . / 59u2 .5 sixteen P 9lt2. t, t, i Pig 7 Compiled by T. Dobrovolsky Editor S. Patrusheva Tehred M. Khodannch Order 4240/51 Circulation 659 Subscription VNISTI USSR State Committee for inventions and discoveries 113035, Mrskva, ZHZZ, Raushsk nab. D. 4/5  Production and printing company, Uzhgorod, st. Project, 4 Proofreader S. Shekmar