SU1735987A1 - Voltage regulator unit - Google Patents

Abstract

Usage: the invention relates to electrical engineering and can be used on electric rolling stock to power auxiliary electrical consumers. SUMMARY OF THE INVENTION: The device contains fully controlled charge and recharge thyristors 1 and 7, first and second capacitors 2 and 4, between which reactor 3 is turned on. By adjusting the open state of charge and recharge thyristors 1 and 7, the output voltage varies from zero to a value determined by the ratio of the parameters of the first and second capacitors 2 and k. By adjusting the amplitude value of the voltage on the first and second capacitors, during charging and recharging, the shape of the output voltage is improved, thereby achieving the goal. 1 il. (L

Description

The invention relates to a converter technique and can be used on electric rolling stock as DC / DC converters with an AC link for powering auxiliary electrical consumers and control circuits.

A device for converting a constant voltage into a constant voltage containing a series-connected load and a reactor, which are connected via a rectifier to the secondary winding of a transformer, a chopper, a reactor and a primary winding of a transformer connected in series and connected to a power source, is known in the device, the diode is shunted by a diode, and the reactor and the primary winding are bridged by a capacitor and a series-connected diode and reactor.

A disadvantage of this device is low efficiency due to losses in the auxiliary elements (diodes and

reactors).

A DC / DC converter is also known, which contains a DC breaker, one output of which is connected

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with one of the input terminals, the transferor, one of the outputs of the primary winding of which is connected to the other DC output, and the secondary winding through the rectifying unit and the reactor connected to the output terminals.

The disadvantage of this device is that the output can be obtained only one half-period rectified voltage with a relatively complex circuit and low efficiency.

Closest to the proposed technical essence and the achieved result is a device for voltage regulation, the device contains in series. a connected recharge reactor and two capacitors, connected by a recharge thyristor, with a load connected to the terminals of one of the capacitors. Between the plus terminal of the power source and the anode of the recharged thyristor, the cathode of which is connected to the minus of the power source, are connected in series to the thyristor and reactor, and the recharging reactor and another capacitor are shunted by an additional thyristor.

The disadvantages of this device are low efficiency, since not all the energy accumulated in the reactor is useful in the load, and in the lack of reliability.

The aim of the invention is to increase reliability and efficiency.

This goal is achieved in that a device containing a charge thyristor, the anode of which is connected to a positive terminal for connecting a power source, a secondary charge thyristor, the first and second capacitors, the reactor and the first additional thyristor, the first and second terminals for connecting the load, combined the first and second terminals of the capacitor, and the cathode of the recharged thyristor is combined with the negative terminal to connect the power source and the second terminal of the capacitor, a second additional thyristor is introduced p, the charging and recharging projectile loader thyristors fully implemented upravanodom overcharge thyristor and n-stand vym terminal of the first capacitor, the thyristor anode pervogodopolnitelnogo

 connected to the cathode of the recharged thyristor and the cathode of the second additional thyristor, and the cathode of the first additional thyristor and the anode of the second additional thyristor with

We are united with the second output of the first capacitor.

The drawing% depicts the principle on the electrical circuit of the proposed device.

15 The device contains a charge-controlled thyristor 1 connected in series with the first capacitor 2, the reactor 3, the second capacitor b, to the plates of which the load 5 is connected. The circuit is connected to the source terminals. power 6 in the conductive for thyristor 1 direction. Between the cathode of thyristor 1 and the minus terminal of source 6

25 a rechargeable fully controlled thyristor 7 is switched on in the direction conducting to the source Between the cathode of the thyristor 7 and the junction point of the capacitor plate 2 and

The jg of the reactor 3 includes the first 8 and the second 9 additional thyristors anti-parallel connected.

The device works as follows.

When thyristor 1 is turned on, 35

40

45

SO

The oscillating charge of the capacitors along the circuit is: plus source 6 - capacitor 2 - reactor 3 - capacitor k - minus source. After a certain amount of charge is charged, the thyristor 1 is turned off and the thyristor 8 is turned on, as a result of which the current of the reactor 3 will flow through the circuit: reactor 3 - capacitor C - thyristor 8. Energy stored in the reactor is transferred only to capacitor k. After the current drops to zero, the thyristor 8 is turned off, the capacitor is discharged to the load 5. Then the thyristor 7 is switched on and the capacitors are transferred to the circuit: capacitor 2 - thyristor 7 - capacitor - reactor 3. At a certain moment of time, for example, on capacitor 2, equal to zero,

Locked, the reactor is connected between the second (55 OFF) the thyristor 7 and turns on the output of the first capacitor and the perististor 9. The current of the reactor 3 will be the output of the second capacitor, looped around the circuit: the thyristor 3 of the charge thyristor 9 is combined with the thyristor 9 - capacitor 4. Energy

the anode of the recharged thyristor and the first terminal of the first capacitor, the anode of the first additional thyristor

connected to the cathode of the recharged thyristor and the cathode of the second additional thyristor, and the cathode of the first additional thyristor and the anode of the second additional thyristor are connected to the second terminal of the first capacitor.

In the drawing%, the circuit diagram of the proposed device is shown.

The device contains a fully controlled fully charged thyristor 1 connected in series with the first capacitor 2, reactor 3, the second capacitor b, and the load 5 is connected to the plates of the capacitor. The circuit is connected to the source terminals. power 6 in the conductive for thyristor 1 direction. Between the cathode of the thyristor 1 and the minus terminal of the source 6

5, a rechargeable fully controlled thyristor 7 is connected in a direction conducting with respect to the source. Between the cathode of the thyristor 7 and the junction point of the capacitor plate 2 and

g reactor 3 includes anti-parallel connected first 8 and second 9 additional thyristors.

The device works as follows.

When you turn on the thyristor 1 start5

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five

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The oscillating charge of the capacitors along the circuit is: plus source 6 - capacitor 2 - reactor 3 - capacitor k - minus source. After the current reaches a certain value, the thyristor 1 is turned off and the thyristor 8 is turned on, as a result of which the current of the reactor 3 will flow along the circuit: reactor 3 - capacitor C - thyristor 8. Energy stored in the reactor is transferred only to capacitor k. After the current drops to zero, the thyristor 8 is turned off, the capacitor 4 is discharged to the load 5. Then the thyristor 7 is switched on and the capacitors recharge on the circuit: capacitor 2 - thyristor 7 - capacitor - reactor 3. At a certain point in time - for example, at capacitor 2, equal to zero,

5 OFF) the thyristor 7 and the thyristor 9 is turned on. The current of the reactor 3 will flow through the circuit: the reactor 3 the thyristor 9 - the capacitor 4. Energy

reactor 3 is transferred to capacitor b, the polarity of the voltage on its plates changes (indicated in brackets). After the current of the thyristor 9 decreases to zero, it switches off, the discharge of capacitor k to load 5 begins. Regulating the duration of current flow through thyristors 1 and

7, the output voltage can be varied from zero to a value determined by the ratio of the parameters of the capacitors.

Claims (1)

Thus, the technical and economic advantage of the proposed device in comparison with the prototype is to improve the shape of the output voltage curve by adjusting the amplitude value of the voltage on the capacitors during charging and overcharging, which leads to a reduction in losses and an increase in efficiency. Invention Formula A voltage control device containing a charge thyristor, the anode of which is connected to a positive terminal for connecting a power supply, rechargeable 173598 / a resistor, first and second capacitors, a reactor and a first additional thyristor, the first and second terminals for connecting the load, combined with the first and second terminals of the second capacitor, the cathode of the recharge thyristor combined with a negative terminal for connecting a source of power supply and a second terminal of the second capacitor, characterized in that, in order to increase reliability and efficiency, a second additional thyristor, charge and 15 the recharge thyristors are fully controlled, the reactor is connected between the second output of the first capacitor and the first output of the second capacitor, the cathode of the charge thyristor 20 is combined with the anode of the recharge of the thyristor and the first output of the first capacitor, the anode of the first additional thyristor is connected to the cathode reloading the bottom thyristor and 25 by the cathode of the second additional thyristor, and the cathode of the first additional thyristor and the anode of the second additional thyristor are connected to the second output of the first capacitor.