SU902168A1 - Dc-to-dc voltage converter - Google Patents

Description

(54) CONVERT VOLTAGE CONSTANT VOLTAGE TO CONSTANT

one

The device is referred to as a secondary power supply source and can be used in power supply devices to convert a DC voltage from one level to a DC voltage of another level.

DC / DC converters are known which contain a main inverter and a booster controller, operating together for a common load 1.

The disadvantage of such a converter is the low dynamic characteristics and the small range of output voltage control.

The closest in technical essence is a converter of a constant voltage to a constant, containing an unregulated converter, two power amplifiers with a control unit, an output transformer, a rectifier, a filter 2.

A disadvantage of the known converter is the low dynamic characteristics. This disadvantage is due to the fact that the feedback circuit of the control unit is one and therefore a disturbance in the form of a sharp increase or decrease in the input voltage passes through the power section of the pre-explorer and only after that affects the feedback circuit on the output voltage regulator.

The purpose of the invention is to improve the dynamic characteristics of the converter.

The goal is achieved by the fact that in a converter containing an unregulated converter and two power amplifiers with an output transformer control unit, a rectifier and a filter, the windings of the unregulated converter transformers and power amplifiers are connected in series via rectifiers and connected to the specified filter, the input The control unit of the first power amplifier 15 is connected to the output terminals, and the input of the control device of the second power amplifier is connected to the input terminals of the converter.

This made it possible to distribute the disturbance factors from the input voltage and the load current to two independent control channels and, next, reduce the control signal passing circuits.

Claims (3)

FIG. 1 shows a DC / DC converter; in fig. 2 - diagrams, which explain the principle of operation. The converter contains an unregulated converter 1 with a high-voltage rectifier m 2 connected to the output of the smoothing filter 3. The first 4 and second 5 power amplifiers are connected in parallel with the converter 1 to the input terminals 6 and 7 of the converter. The output winding of the transformer of the power amplifier 4 through the rectifiers 8 is connected in parallel to the diodes of the rectifier 2, and the output winding of the transformer of the MOHI amplifier 5 through the rectifiers 9 is connected in parallel to the diodes. block 10 y The amplifier 4 is connected in parallel with the output pins 11 and 12 of the converter, and the input of the control unit 13 of the amplifier 5 is connected parallel to the output 6 and 7. The additional winding of the output transformer and converter 1 is connected to the inputs of the synchronization of blocks 10 and; 3 controls. The control units are made, for example, in the form of flip-flops, to the input of which pylorbras voltage is applied, combined with the control voltage of the reverse-coupling circuit 3 |. On . 2 shows: EZ, a terminal on the output winding of the transformer of the converter 1; E. Ee, - p.mpu.tyy management, respectively, usi, 1tel. 4 and about power; I.j, Е - voltage of the voltages at the windings of the transformers of the amplifiers 4n about monyou; Eg, total nan) same1: ia converter I and driver11 4 and 5 lupiyusti ia v.hode sg,: 1zhpvak) | tsefi:.: 1, tra 3.Fig. 2a corresponds to the minimum input position and the maximal max) narrow, phi1. 26 but a terminal input voltage, FIG. 20 - max. 1 input voltage and minimum load; T, v is the period of modulating the voltage of the 10 I 13 control blocks, E j-, is the amplitude of the zero voltage of the extracted voltage. The converter works s.Heduk) n, im image. The voltage E at the output winding of the unregulated converter 1 depends on the voltage of the inverter 6 and 7 and the amplifier 5, and depending on the output voltage when the load current is changed by the amplifier 4, voltage is added E4 and Eg of the high voltage windings of the transformers of amplifiers 4 and 5 of the vehicle through terminal 18 and 19. At the minimum input voltage and maximum load (Fig. 2a), the amplifiers 4 and 5 of the power operate during part of the period T modulating voltage E of blocks 10 and 13 controls tim and the load 3 is supplied through a filter stabilized voltage Eg, equal su.mme vy.hodnyh voltage windings transfor.matorov converter (EI) and the two amplifiers monshosti (E4I Eg). When uve: input voltage and input voltage, the MOHj.nocTn amplifier works only during a part of the modulating voltage period (Fig. 26), the boost voltage is reduced accordingly, i.e., the average value of the 1 N1 input filter 3 is stabilized by changing EP stresses. Similar to the reduction of the load yMCiibuiaeTCJi, the time of operation of the amplifier 4 during the period T of the modulating voltage (phi 2nd). Thus, in the converter there is a separate regulation of the time of operation of booster voltages; 1 tori of amplifiers 4 and 5 of power depending on changes in the load current and input; 1 volt1. 1-1: 1 npi-iinuiiia works |, | it follows that the possibility iiieiiiiii (1) e: gc) e is magnificence or diminishes iiiiiniel but inlet () g: to the non-intergenerational voltage THENIiCi (;:.:. act on the regulation; I control elements 1; T. CH1 (. 1 1-: sk. . -n) tea1 and (: the persistence of penalties for reverse siii.; 1yew the dynamic properties of n; nm) brn:) () pad. In sravpepin with an .1o: - ;;. Mi, the local limits and:. Changes up to 6a io4) () rf pan. Signal {:}. M control about | 5aГ1 ОO riisrii-i is divided into less (30 ° / n in. place 50 And)). Therefore, the amplitude value of the 1 st 11 g Ig is changed to correspond to u; , i; ie, with the spasmodic character of irivieiiciJiiH Harpv: iKH or E, the course of the first voltage. : g :): ak / ke. dynamic khaki 1: reob; a: i) zatel. o6p; i: K) M, yMeinanieiiiie values BoMioro 1 a; can be matched. : t: vnoe-: t drose / g ph. gztra athe.1 in with known: ipeii6paiO iaTe,. d) go also transform dynamics: 5ovat,: 1, its weight and dimensions. Usage), j: iByKOiibix Wuxi; p-ghelii moptsyusti and koniefiiopji H1) and often modulating the modulating napravl1i1-1 in: it is possible to implement. Part 1: GHz and High Frequency Sta1: PC (.1 Dischargers and: Isklyuks. Claims of the Inverter Constant Voltage to Barely Disposable Containing Not HisGuli1) e Miiui KonisepTOp, two power amplifiers with control unit, output transformer. test; 1b, a filter, characterized in that. in order to improve the dynamic ha) actorists. In p.m, the output windings of the tra: unformable converter unformators and amplifiers of the network through the rectifiers of the connection | The controller is connected to the specified loudspeaker, with the input of the control unit of the first amplifier. It is connected to the output pins, and the input of the control device of the second power amplifier is to the input pins of the converter. Sources of information taken into account during the examination 1. USSR author's certificate No. 603067, cl. H 02 M 3/24, 1977. 2. USSR author's certificate No. 589672, class, H 02 A-l 3/24, 1976. 3. Handbook of converter equipment Ed. Chizhenko, Kiev, "Technique. 1978, p. 222-226. f but El five one II P five pda