SU714594A2 - Braslavsky's ac-to-dc converter - Google Patents

Description

The invention relates to the field of converter technology and can be used as a power source for various devices. Basically auth. svid No 637928 describes a transducer containing C-tse kidneys, vc euchenpath consistently between the input and output. The disadvantage of this converter is its limited functionality, since it cannot be used to power two midpoint loads. The purpose of the invention is to provide the possibility of powering two series-connected loads. This is achieved by the fact that the predlozny transducer is equipped with additional AND chains and two Zener diodes connected in series between the output of the additional key and the negative output of the rectifier, while the main And chains are connected between the first zener diode and the first output clamps, and the additional i1 chains are connected between the second zener diode and second output clamps. FIG. 1 is a schematic diagram of a converter; in fig. 2 diagrams of currents and voltages. The converter consists of a single-phase bridge rectifier 1, which through a controlled key 2 in one of its output buses is connected to points that are serially connected to the input Hbjx between each input of two groups of capacitor-diode cells, each; of which consists of diodes 3-10, capacitors 11-13 and controllable switches 14 connected to output terminals 15 and 16. By means of terminals 17, the converter is connected to the primary source of alternating current voltage. Between the output of the control key 2 and O17), the test output of the rectifier 1 sequentially turns on the zener diodes 18 and 19. The converter operates as follows: In the steady state, the alternating current voltage (cNf. Fig. 2) is converted by the bridge 1 into a pulsating voltage with amplitude and and frequency, multiple of rectification phases (). Under the influence of these pulses, the open controlled switch 2 is charged by the capacitors 11-13 of both groups of 15WHDG cells of the accumulation circuit — dividing the current 1A over 2O (each half-period of the voltage being transformed; to the angle of current cut-off of the gate valves 1) . With the same capacitances of the capacitors of the accumulation circuit, each of them will charge approximately to a voltage of 211 times. The magnitude of the amplitude and the pulsing voltage and. In STO, the time controlled keys 14 are open. After the end of the charge of the capacitors, the control key 2 is disconnected, and the control keys 14 are closed by connecting the chains to the output terminals. During the (L &) of each half-period, the capacitors of both groups in parallel will be discharged to their loads. Consequently, the alternating current voltage is converted by the rectifier into two polar-polarized common AC busbars. The stabilization stabilization zener diodes 18 and 19 are chosen such that in the established nominal mode they do not affect the operation of the converter. Their work is that when one output current decreases (for example, at terminals 15), Zener diode 18 limits the increase in voltage on capacitors of the first group and the decrease in voltage on capacitors of the second group, thereby ensuring the same voltage on the output terminals. An inventive converter AC-to-constant converter according to author. St. No. 637928, about tl and h and y with the fact that, in order to ensure the possibility of supplying two series-connected loads, it is equipped with additional C chains and two zener diodes connected in series between the output of the additional switch and the negative output of the rectifier, In this case, the base h of the chain is connected between the first zener diode and the first output terminals, and the additional I chains are connected between the second stabilizer and the second output terminals.

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Claims (1)

, For rula of the invention AC / DC Converter according to ed. St. No. 637928, on the basis of which, in order to ensure the possibility of supplying two series-connected loads, it is equipped with additional AND chains and two zener diodes connected in series between the output of the additional key and the negative terminal of the rectifier, with In this case, the base h of the chain is connected between the first zener diode and the first output terminals, and the additional I chains are connected between the second zener diode and the second output terminals.