SU1248013A1 - Voltage multiplier - Google Patents

Abstract

The invention relates to the field of converter technology and can be used as a voltage multiplier in the power sources of electronic and radio equipment. The purpose of the invention is to improve the weight and size parameters and to expand the range of regulation and functionality. The device contains input inputs 1.2 and output outputs 3.4 for connecting, respectively, the alternating voltage source and the load, and n multiply stages connected in parallel. Each step of the multiplication, in addition to the first, includes a series-connected diode 7, capacitors 12, 11, and diode 9, with the chain of capacitors shunted by a key element. In the first stage of multiplication, the diodes are replaced by thyristors 8, 10. Anodes and codes of all valves, as well as input 1 and output 4, are connected to the common bus. In the last step of the multiplication key element is missing. The moving contact of each switch, - the bodies 13, is connected to the common connection point of the capacitors of the subsequent stage, which in the last stage is connected to terminal 3. The device provides the output voltage, both constant and alternating currents, taken from the output terminals 3 4 and 5.6, the latter of which are formed by the common points of connection of diode 7 with capacitor 12 and diode 9 with capacitor 12 of the last stage with a small number of stages of multiplication. The adjustment is made by changing the phase of the controlled signals applied to the thyristors 8,10. 1 il. (L to 4 00 with

Description

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The invention relates to electrical engineering and converter technology, in particular, voltage multiplying devices, and can be used in power supply devices for electronic and radio equipment. .

The purpose of the invention is to improve the overall dimensions, expanding the range of regulation and functionality by obtaining the increased voltage simultaneously on alternating and direct currents.

 The drawing is a schematic diagram of a voltage multiplier.

Voltage multiplier contains input pins 1 and 2 for connecting an alternating voltage source, output pins 3 and 4 for connecting an AC load, outputs 5 and 6 for connecting DC loads and n parallelly connected multiplex stages, the anodes the first diodes 7, including the thyristor anode 8, and the cathodes of the second diodes 9, including the thyristor cathode 10, of all stages, as well as the input pin 1 and the output pin 4 are connected to a common bus.

The first stage is represented by capacitors 11 and 12, thyristors 10 and 8, and switch 13. The positive plate of the capacitor 11 and the negative plate of the capacitor 12 have a common junction point and are connected to the input terminal 2, the negative tab of the capacitor 11 is connected to the anode of the thyristor 10, and the capacitor 12 resistive plate is with the thyristor 8 cathode, the switch 13 is connected by one fixed contact to the connection point of the capacitor 11c by the thyristor 10, by another fixed contact to the connection point of the capacitor 12 s By the resistor 8, and by the movable contact to the point of connection of two similar capacitors of the subsequent stage. In addition to two capacitors, each subsequent stage contains, like the first, two diodes and a switch, which is absent in the last stage.

From the common connection point of the capacitors of the last stage and from the common bus, output pins 3 and 4 were obtained to connect the AC load, and the capacitors connected in series with each other

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thirty

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the steps form the output terminals 5 rii 6 for connecting a direct current load.

The voltage multiplier works as follows.

In the initial state, all capacitors are charged with a constant voltage with the polarity shown in the drawing. With handouts to the input | Holes 1 and 2 of alternating voltage and. „" and "power supply in positive half-periods, the movable switch cycles are located in: (Upper positions, and in negative half-periods - in lower positions) Work processes in the multiplier :: for example The terms can be divided into two half - periods.

In the positive semiperiodine (Noah pin 2 has a positive potential of the power source relative to the potential of the input pin 1), when the moving contacts of the switches are in the upper positions, i the capacitor 11 is charged and the capacitor 12 is discharged. The first stage capacitor 11 is charged to , determined by the thyristor turn-on phase 10. Phase H of the control signal supplied to the input ty. Ristor 10 is within / t /. -: With input control phase on. of the signal / / 2, the capacitor 11 of the first multiplication stage is charged to: Vf, where U is the amplitude voltage. In this half-period, the current from the power source (from pin 2) splits into two branches: branch capacitor 11 — thyristor 10 and branch capacitor 12 — switch-on, 13 — circuit of the next stage. Further, the current at the input of the second stage branches out similarly to the first stage and the charge of the second stage capacitor 11 to the voltage C, the first stage and the discharge of the second stage capacitor 12 to some residual voltage occurs. At U of the first stage, equal to U, the capacitor 11 of the second stage is charged to a voltage of 2 and. In subsequent stages, a further doubling of the voltage at their inputs occurs. .

In the negative half-period (input pin 1 has a positive potential of the power source relative to the potential of the input pin 2). when the moving contacts of all switches are in the bottom

Even x, even index capacitors and odd in- and dex capacitors vary.

Thus, the voltage across the capacitors with a transition to each subsequent step is doubled. The input voltage expressions are represented as

and out

on alternating current and

(ABOUT

and

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2 "m

(2)

at a constant current, where n is the number of stages of multiplication.

Multiplier 2 in expressions (1) and (2) indicates the possibility of obtaining a higher output voltage at alternating and direct currents with a relatively small number of stages of multiplication of the circuit.

In the proposed device, when the multiplication factor of each stage is a multiple of two values of the capacitance of the capacitors in each subsequent stage should be less than the value of the capacity of the previous stage four times. This creates the same energy regime for all stages.

The shape of the curve of the output voltage of the connection of the load constant

current, characterized in that, in order to improve the weight and size indicators, to expand the control range and functionality, the first voltage multiplier valves are controlled, the common connection point of the first stage capacitors forms the second input terminal, the first pair of output terminals are formed by common points the connection of the first valve with the first capacitor and the second capacitor with the second valve of the last stage, and the second pair of output-outputs serves for connecting the load alternately and is formed on the current common junction capacitors of the last stage and the common point of the first input terminal of the second compound of the cathodes and gates of all the anodes of the first valve stage voltage multiplier.

at a constant current, the quality of the curve, the output voltage of the alternating current is much better than the shape of the curve of the known devices with thyristor controllers. This is achieved by applying a half-wave sinusoid to an increased residual voltage on the capacitors.

The output voltage is controlled by changing the phase of the control signals supplied to the inputs of the thyristors 10 in the interval / 2, 8 in the interval 64 ... At intervals, / 2 and

3f

  capacitors 11 and 12 of the first multiplication stage are charged to the amplitude of the input voltage U, which ensures the output of the voltage -, represented by the expressions (1) and (2). - At,%, 2Т circuit

VNIIPI Order 4138/56

Random polygons pr-tie, Uzhgorod, st. Project, 4

The charges of the indicated capacitors 11 and 12 will turn off and they will terminate the functions of the ballast (additional) capacitors in the current path to the subsequent stages.

Formula. isobrenic;

Voltage multiplier containing

p parallel-connected voltage multiplication stages, each of which is executed in the form of a series-connected first valve, two capacitors and a second valve, mechanical switches, each of which is connected to the common connection point of the subsequent stage capacitors by the moving contact, and the first and second fixed contacts, respectively the common point of connection of the first valve with the first capacitor and the second condenser with the second valve of the previous stage, and two pairs of output terminals

the common connection point of the anodes of the first valves of all stages forms the first input to connect the source of supply voltage, and the first pair of output pins serves

five

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five

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current, characterized in that, in order to improve the weight and size indicators, to expand the control range and functionality, the first voltage multiplier valves are controlled, the common connection point of the first stage capacitors forms the second input terminal, the first pair of output terminals are formed by common points the connection of the first valve with the first capacitor and the second capacitor with the second valve of the last stage, and the second pair of output-outputs serves for connecting the load alternately and is formed on the current common junction capacitors of the last stage and the common point of the first input terminal of the second compound of the cathodes and gates of all the anodes of the first valve stage voltage multiplier.

Circulation 631

Subscription

Claims (4)

Claim A voltage multiplier containing η parallel-connected voltage multiplication stages, each of which is made in the form of a series-connected first valve, two capacitors and a second valve, mechanical switches, each of which is connected by a movable contact to the common connection point of the capacitors of the next stage, and the first and second fixed contacts respectively to the common point of connection of the first valve with the first capacitor and the second capacitor with the second valve of the previous stage, and two pairs output terminals 7 and the common point of connection of the anodes of the first valves of all stages forms the first input terminal for connecting a power supply source, and the first pair of output terminals serves to connect a DC load, characterized in that, in order to improve overall dimensions, expand the control range and functional possibilities, the valves of the first stage of voltage multiplication are controllable, the common connection point of the capacitors of the first stage forms a second input terminal, Single pair of output terminals formed by the common points of the first valve connection is made by changing the phase control signals fed to the inputs of the thyristors in the range 10 ^ / 2 4 and 8 in the interval 3 ^ / 24 4 4 ^ 4 2fr. In the intervals 0 4 4 ^ 6 ^ / 2 and ^ 4 ^ 4 3 ^ / 2, the capacitors 11 and 12 of the first stage of multiplication are charged to the amplitude of the input voltage U _M , which is provided at the voltage outputs ·, represented by expressions (1) and (2) . With%, = 27ι of the circuit with the first capacitor and the second capacitor with the second valve of the last stage, and the second pair of output-outputs serves to connect the AC load and is formed by a common connection point of the capacitors of the last stage and a common connection point of the first input terminal with the cathodes of the second valves and anodes of the first valves of all stages of voltage multiplication. ВНИИПИ Order 4138/56 Circulation 631 Subscription Custom polygr. ave, city of Uzhhorod, st. Project, 4