SU1334351A1 - Device for controlling thyristors of pulse voltage regulator - Google Patents

Abstract

The invention relates to electrical engineering and can be used to automatically control the voltage of DC generators. The aim of the invention is to increase the control accuracy. The goal is achieved by the fact that each relaxation generator. 10 and 11 is equipped with a transistor 13 and a load resistor 14, and the measuring and regulating body 18 is provided with a threshold element 21. At the same time, by combining the duration of the pulses and pauses between them, the combined (frequency-width) principle of automatic current regulation in the circuit excitation windings of the generator 4. „1 sludge. Q S (L

Description

The invention relates to electrical engineering and can be used to automatically control the voltage of a dc generator,

- The purpose of the invention is to improve the accuracy of regulation.

The drawing shows a schematic diagram of the device.

A device for controlling thyristic flows through the circuit: terminal + generator 4, normally closed contact 27j of relay 26, excitation winding 5, terminal - generator 4.

Simultaneously with the increase in voltage

1 and 2 of the pulse voltage regulator of the power supply source 3 in the form of a parallel excitation generator 4 with the excitation winding 5 contains a half-bridge generator 15 charging the capacitor 12 successive inverter, the complete generator 11 and the capacitor 22 through thyristors 6 and 7 , the output pulse choke 23, the diode 25 and the winding 5 by the transformer 8, the secondary windings of the generator 4. Since the voltage of which is connected to the control

20

transitions of thyristors 1 and 2, and a switching capacitor 9, in parallel with which the power input of the relaxation generator 10 is connected; 5 whose output is connected to the control transition of the inverter thyristor 7. The output of the master relaxation generator 1 1 is connected to the control transition of the thyristor 6 of the inverter.

Generators 10 and 11 are made with each forming capacitor 12, shunted by series-connected emitter-collector junction transistor 13 and load resistor 14, as well as serially connected key elements 15, for example, a thyristor and a primary winding of the output pulse transformer 16.

25

thirty

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the generator 4 is low, the threshold element 21 does not conduct, the transistor 13 of the generator 11 is closed and does not shunt the capacitor 12, the charge of the latter goes quickly.

When the voltage on generator 4 reaches 12-15 V, relay 26 trips and opens contact 27. This voltage is the breakdown voltage of the threshold element 17 of the generator 11. After the breakdown of the threshold element 17, the capacitor 12 is quickly discharged through the thyristor 15 and the primary winding of transformer 16 "From the secondary winding of transformer 16, a current pulse arrives at the control electrode of the thyristor 6 and closes it. The capacitor 9 is charged through the primary winding of the output transformer 8.

From the secondary winding of this transformer, a current pulse arrives at the control output of the key element, Q, the equalizing electrode of the thyristor 1 and

This 15 is connected to the capacitor 12 through the threshold element 17, To the output of the power source 3 the power input of the generator i1 is connected to the measuring and regulating body 18, made on the alternating resistor 19, shunted by a chain of series-connected resistors 20 and the threshold element 21 , to the output of which a base is connected, the base of the transistor 13 of the generator 11 is connected, the base of the transistor 13 of the generator 10 is connected to the load resistor 14 of the generator 11.

In addition to the main 1 and switching 2 thyristors, the pulse voltage regulator contains a switching circuit from capacitor 22 and throttle 23, charge 24 and reverse 25 diodes and recirculates it. The excitation winding 5 is connected to the full voltage of the generator 4. The voltage of the latter increases rapidly.

45 When charging the capacitor 9, the charge of the capacitor 12, generator 10 starts, as the transistor 13 of the generator 11 is closed, the transistor 13 of the generator 10 is open and shunts the condenser 12 of the generator 10. The degree of shunting is determined by the resistor 14 When the capacitor 12 of the generator 10 is charged until the voltage breakdown of the key element 17 is opened

55 torus 15 and capacitor 12 quickly pass through it and the primary winding of the transformer 16. An impulse from the secondary winding of this transformer opens the thyristor 7 and the condenser 26 with a normally closed contact 27.

The device works as follows.

The initial excitation of the generator 4 is carried out due to the residual magnetic induction. Nrk is the excitation current under the action of residual emf

4, normally closed contact 27j of relay 26, excitation winding 5, generator terminal 4.

the generator, the capacitor 12 of the generator 11 and the capacitor 22 are charged through the choke 23, the diode 25 and the excitation winding 5 of the generator 4. Since eg

Simultaneously with the increase in voltage

The capacitor 12 of the controller 11 and the capacitor 22 are charged through the generator 23, the diode 25 and the winding 5 of the generator 4. Since

the generator, the capacitor 12 of the generator 11 and the capacitor 22 are charged through the choke 23, the diode 25 and the excitation winding 5 of the generator 4. Since eg

the generator 4 is low, the threshold element 21 does not conduct, the transistor 13 of the generator 11 is closed and does not shunt - the capacitor 12, the charge of the latter goes quickly.

When the voltage on generator 4 reaches 12-15 V, relay 26 trips and opens contact 27. This voltage is the breakdown voltage of the threshold element 17 of the generator 11. After the breakdown of the threshold element 17, the capacitor 12 is quickly discharged through the thyristor 15 and the primary Transformer winding 16 "From the secondary winding of the transformer 16 a current pulse arrives at the control electrode of the thyristor 6 and closes it. The capacitor 9 is charged through the primary winding of the output transformer 8.

From the secondary winding of this transformer, a current pulse is fed to the equal electrode of the thyristor 1 and from

grunts him. The excitation winding 5 is connected to the full voltage of the generator 4. The voltage of the latter increases rapidly.

45 When charging the capacitor 9, the charge of the capacitor 12, the generator 10 starts, as the transistor 13 of the generator 11 is closed, the transistor 13 of the generator 10 is open and shunts the condenser 12 of the generator 10. The degree of shunting is determined by the resistor 14 When the capacitor 12 of the generator 10 is charged Before the voltage breakdown of the key element 17, the thyristor 15 opens and the capacitor 12 is quickly pulled through it and the primary winding of the transformer 16. The pulse from the secondary winding of this transformer opens the thyristor 7 and the condensation 3134351

the torus 9 is quickly discharged through it, containing the measuring and regulating and primary winding of the transformer 8. ruyushy organ and half bridge pulse Impulse from the secondary winding transforming inverter, made on the mat 8, goes to the control thyristor, output pulse electrode of the thyristor 2. As a result of the transformer, the secondary windings of the capacitor 22 capacitor 22 thyristor 1 are connected to be closed and the current in the winding 5 of the control transients of the burist thyristors is stopped. The voltage of the pulse regulator and of the commutator 4 is reduced by a U capacitor, in parallel with that When the voltage of the generator 4 is connected to the power supply input, the value of the resistor feedback generator, 14, the threshold element 21 open-including forming capacitor, e. The transistor 13 also opens up, the output of which is connected to the control of the oscillator 11, to the shunt of the condenser-to-transition of one of the thyristors torus T2. The charging time of the capacitor 12 of the inverter to the control transition increases. The frequency of the master generator of another thyristor of which is connected to the terminal 11, and, consequently, the frequency of the output of the master generator of the relaxation current pulses of the excitation winding 5, the oscillator, which includes the shaping terminal, decreases. The voltage drop across the res-20 capacitor, one power supply input to the resistor 14, after opening the transistor, is designed to connect generator 13, 13, and controls the current to the positive terminal of the power source, the base of the transistor 13, and generator 10, consequently, the charge time of the con- in order to increase the accuracy of the regulator of the generator 12 tO, i.e. van-25, each relaxation generator generates an automatic regulation torus equipped with a transistor and the load-time charge of the capacitor 12 with a general resistor, and the measuring regulator 10 (pause between pulses, the long-lasting organ is supplied with a threshold electrical impulse current in the winding of 3 cops included in the trans excitation base circuit) .30 zistor, emitter-collector junction

Thus, due to the introduction of which is connected in parallel to a form-combined (frequency-latitude) switchgear to a common capacitor setting the relax- principle of an automatic adjustment generator through current loads in the excitation winding ™ circuit, the resistor to which the generator is connected transistor, emitter-collector pulse duration and the pa-, lsh transition of which through the load-path between them achieves an increase and the resistor shunts the shaping accuracy of the voltage the coupling capacitor of the relaxation generator. Feedback, with the gauge .Q but the regulating organ connected to parallel. the mule of the invention for defining relaxation g e ™

nerator, other power code output

The device for controlling the thyristor is connected to the minus outlets of the pulse regulator directly at the power source.

Claims (1)

Claim A device for controlling thyristors of a pulse voltage regulator 351, containing a measuring and regulating element and a half-bridge serial inverter made on two thyristors, an output pulse transformer, the secondary windings of which are designed to connect to the control transitions of the thyristors of the pulse regulator, and a switching capacitor, in parallel with which the power input is connected relaxation feedback generator, including a forming capacitor, the output of which is connected to the control which leads to the transition of one of the thyristors of the inverter, to the control transition of the other thyristor of which the output of the master relaxation generator is connected, including the forming capacitor, one output of the power input of which is designed to connect to the plus output of the power source, characterized in that, in order to increase accuracy regulation, each relaxation generator is equipped with a transistor and a load resistor, and the measuring and regulating body is equipped with a threshold element included in the base circuit of the transistor RA, the emitter-collector junction of which is connected in parallel with the forming capacitor of the master relaxation generator through the load resistor to which it is connected. the base of the transistor, the emitter-collector junction of which through the load resistor shunts the forming capacitor of the relaxation feedback generator, and the meter) the regulating body is connected in parallel with the master relaxation generator, the other output of the power input of which is connected to the negative output of the power source.