SU1310969A1 - Three-phase a.c.voltage-to-d.c.voltage converter with voltage manipulation - Google Patents

Abstract

The invention relates to electrical engineering and can be used for transformer-free power from a high-voltage network, as well as for obtaining an increased voltage from a network with an increased number of phases. The purpose of the invention is to reduce the output voltage ripple, ensuring uniform phase loading and enhanced functionality. The device comprises a voltage multiplying circuit configured on capacitors 4-6 and valves 7-9. Capacitors 4-6 are connected respectively between input terminals 1-3 for connecting the network and M affUi. exits 10-12 multiplication schemes. The valve 7 is connected between the output 1 and the output 10. The valve 8 is connected between the output 10 and the output 11. The valve 9 is connected between the outputs 11 and 12. The valves 7-9 between them are connected in series. An additionally inserted diode-capacitor circuit consists of a capacitor 13 and a diode 14. A capacitor 13 is connected between the output terminals 15 and 16 for connecting the load. Pin 16 is common and can be grounded. A diode 14 is connected between the terminal 15 and the output 12 of the multiplication circuit. The introduction of the capacitor 5 and the diode-capacitor circuit and the above connection of the elements of the device provide the tripling voltage on the load. This increases the rate of increase in voltage, the load capacity and facilitates obtaining a high multiplication factor by cascading together identical devices. By using several diode-capacitor circuits and grounding one of the output pins, several loads are connected to different voltages. 2 hp f-ly, 2 ill. 8 P no 7 i (L with about with 05 CO 73 I fie. 1 V

Description

The invention relates to electrical engineering and can be used to supply high-voltage loads directly from an AC network without a step-up transformer, as well as to receive an increased voltage from a network with an increased number of phases.

The purpose of the invention is to reduce the output voltage ripple, ensuring uniform phase loading and enhanced functionality.

FIG. 1 is a schematic diagram of the device; in fig. 2 shows an example of a two-stage device design.

The converter (Fig. 1) contains input-, terminals 1-3 for connecting a three-phase power source, capacitors 4-6, and valves 7-9, forming a multiplication circuit with outputs 10-12, a diode-capacitor chain from a capacitor 13 and diode 14.

Loaded loads can be connected to any capacitor. To increase the output voltage, you can increase the number of phases of the supply voltage, or include several multiplying links in series or in parallel. The diode-capacitor circuit from diode 14 and capacitor 13 provides the ability to operate several loads connected to each other, the common output terminal and the loads can be grounded.

The device of FIG. 2 works in a similar way.

After charging the capacitor 4 to triple the voltage, the capacitor 18 is charged to triple the voltage, since when the mains voltage is added to the voltage of the capacitor 4, the voltage of the capacitor 5 is subtracted, since the voltage across the capacitor 5 has opposite polarity. When charging condenser 19

Capacitor 13 is connected between the output 20 of the quadruple voltage on the capacitor leads 15 and 16, with pin 16 in the voltage switches 5 and 18 and the network voltage being subtracted from the total. A diode 14 is turned on. A double voltage of the capacitor 6 is interposed.

pins 12 and 15. Condenser 6 is turned on - When charging the capacitor 17 from the pack, it is between the input terminal 3 and the output voltage on the capacitors 6 and 19

house 11 of the multiplication circuit to which the network voltage is subtracted is the voltage

The common point of the connection of the anode of the vented condenser 4 is included. B is the result 9 with the cathode of the valve 8. The cathode of the valve 9 is connected to the output 12 of the multiplication circuit and the anode of the diode 14. The anode of the valve 8 is connected to the output 10 of the multiplication circuit and to the cathode of the valve 7, the anode of which is connected to the input terminal. A capacitor 4 is connected between the input terminal 1 and the output 12 of the multiplication circuit, and a capacitor 5 is connected between the input terminal 2 and the output 10 of the multiplication circuit.

thirty

35

those remains tripled voltage. When capacitors 4 and 17 are discharged to the load, their voltages will add up to the indented value, and at the output terminal 28 it will add to the amplitude value of the phase voltage that exists between the common terminal and the phase. The additional transducer (second multiplication link) may be incomplete if no voltage is required. In this case, the diode 23 is connected to the output 26 or the output 27. In ka- The device according to FIG. 2 differs from the multiplication unit and diode terminal devices of FIG. The 1 introduced additional capacitor circuits can be used with an identical transducer, you are diodes, thyristors, as well as any replenished in the same way as equiprable keys that provide the subcapital, including capacitors 17-19, 40 transducer to the network on the part of the half-fan 20-22 and diode-capacitor period with given cut-off angles.

The converter allows to increase the rate of voltage rise and load capacity. In addition, it is easier to obtain a high multiply factor from diode 23 and capacitor 24, with the positions 25-27 designating the outputs of the multiplication circuit, and 28 the additional output pin.

The converter works as follows, it improves the filtering voltage,

in a way.

If the voltage is positive at the input terminal 1 (Fig. 1) relative to the terminal 2, the capacitor 5 is charged to an amplitude value. With a positive voltage at terminal 2 relative to the voltage at terminal 3, the capacitor 6 is charged to twice the voltage value; since the network voltage is added to the voltage of the capacitor 5.

by increasing the pulsation frequency and increasing the possibilities of using the converter.

Claims (3)

1. Three-phase AC to DC converter with voltage multiplication, containing three inputs. When a voltage is positive at the input 55, output to connect the source of output 3 relative to the supply voltage, two output terminals for supplying 1 capacitor is charged. 4 load keys and multiplication circuit of three times the voltage value. Isolation with three followers Loaded loads can be connected to any capacitor. To increase the output voltage, you can increase the number of phases of the supply voltage, or include several multiplying links in series or in parallel. The diode-capacitor circuit from diode 14 and capacitor 13 provides the ability to operate several loads connected to each other, the common output terminal and the loads can be grounded. The device of FIG. 2 works in a similar way. After charging the capacitor 4 to triple the voltage, the capacitor 18 is charged to triple the voltage, since when the mains voltage is added to the voltage of the capacitor 4, the voltage of the capacitor 5 is subtracted, since the voltage across the capacitor 5 has opposite polarity. When charging condenser 19 charged capacitor 4. As a result those remains tripled voltage. When capacitors 4 and 17 are discharged to the load, their voltages will add up to the indented value, and at the output terminal 28 it will add to the amplitude value of the phase voltage that exists between the common terminal and the phase. The additional transducer (second multiplication link) may be incomplete if no voltage is required. In this case, diode 23 is connected to pin 26 or pin 27. Diodes, thyristors can be used as multiplication links and diode-capacitor circuits, as well as any measures to increase the pulsation frequency and expand the possibilities of using the converter. Invention Formula 3 but connected valve and two capacitors, the common connection point of the anode of the first valve to the cathode of the second valve is connected via the first capacitor to the first input terminal, and the second capacitor is connected between the third input terminal and the first output of the multiplication circuit, in order to reduce pulsations output voltage, ensuring uniform phase loading and extending functionality, a third capacitor and a diode-capacitor circuit are additionally introduced, the third capacitor being switched on waiting a second input terminal and the common connecting point of the cathode to the anode of the third gate of the second gate forming a second output of multiplying circuit, said total point connecting the first and second valves forms a third multiplying circuit output, con Editor M. Kelemesh Order 1764/53 VNIIPI USSR State Committee for Inventions and Discoveries 1 13035, Moscow, Zh-35, Raushsk nab., 4/5 Production and Printing Infrastructure, Ul city, ul. Design. four 0 five A capacitor of the diode-condensate circuit is connected between the output pins, one of which is common, and a diode of this chain is connected between the nerve output of the multiplication circuit and the output pin. 2. The converter according to claim I, characterized in that, in order to increase the multiplication factor, an identical converter is additionally introduced, the inputs of which are connected to the corresponding outputs of the multiplication circuit and the output of the main converter. 3. The Converter in PP. 1 and 2, characterized in that, in order to supply several loads, additional capacitor-voltage circuits are additionally introduced, the diode input of each of which is connected to the corresponding output of the multiplication circuit, and the output to the corresponding output terminal. Compiled by L. Ustinknna Tehred I. Veres Circulation 661 Proofreader A..A hooper Subscription