SU532950A1

SU532950A1 - Device for pulse width voltage regulation

Info

Publication number: SU532950A1
Application number: SU2092219A
Authority: SU
Inventors: Анатолий Борисович Зеленов; Александр Валентинович Садовой; Николай Николаевич Сергиенко
Original assignee: Коммунарский Горнометаллургический Институт
Priority date: 1975-01-03
Filing date: 1975-01-03
Publication date: 1976-10-25

Description

(54) УСТРОЙСТВО ДЛЯ ШИРОТНО-ИМПУЛЬСНОГО РЕГУЛИРОВАНИЯ(54) DEVICE FOR PULSE-PULSE REGULATION

Изобрете ше касаетс преобразовательной техники и может быть использовано до плавного регулировани в широком диапазоне напр жени на нагрузке, например на обмотке возбуждени или коре двигател .The invention relates to converter technology and can be used to smoothly control over a wide voltage range at the load, for example, on the field winding or on the motor core.

Известны устройства дл широтно-импульсного регулировани напр жени на нагрузке, содержащие два источника питани , включенных встречно-лараллельно на нагрузку через силовые тиристоры, которые соединены между собой узлом искусственной коммутации.Devices for pulse-width voltage regulation on a load are known, containing two power sources connected counter-load to the load through power thyristors, which are interconnected by an artificial switching node.

Наиболее близким по технической сзоцности к предложенному вл етс устройство дл импульсного регулировани напр жени на коре двигател , в котором дл повышени надежности схемы силовые тиристоры соединены между собой двухобмоточным трансформатором, обмотки которого подключены к силовым деп м тиристоров через конденсаторы.The closest in technical value to the proposed is a device for pulse voltage control on the motor cortex, in which, to increase the reliability of the circuit, the power thyristors are interconnected by a two-winding transformer, the windings of which are connected to the power terminals of the thyristors through capacitors.

Однако зар щ и разр д коммутирующих конденсаторов происходит через силовые тиристоры, вследствие чего их коммутационна способность и работоспособность устройства в целом завис т от величинь тока нагрузки. Работаю1дий тиристор гаситс лишь после включени второго силового However, the charging and discharging of switching capacitors occurs through power thyristors, as a result of which their switching capacity and operation of the device as a whole depend on the magnitude of the load current. I work as a thyristor extinguishes only after the second power

НАПРЯЖЕНИЯVOLTAGE

тиристора, что приводит к возникновению сквозных коротких замьп аний вьшр мителей, необходимости завышени мощности гас щих устройств дл обеспечени надежной коммутации тока короткого замыкани и резкому возрастанию коммутационных потерь.thyristor, which leads to the occurrence of through short-circuits of the breakers, the need for over-power of damping devices to ensure reliable switching of the short-circuit current and a sharp increase in switching losses.

В предложенном устройстве зар д и разр д коммутирующих конденсаторов происходит через вспомогательные тиристоры.In the proposed device, the charge and discharge of the switching capacitors occurs through the auxiliary thyristors.

Это позвол ет уменьшить коммутационные потери и повысить надежность устройства.This makes it possible to reduce switching losses and increase the reliability of the device.

Схема устройства показана на чертеже.Diagram of the device shown in the drawing.

Claims

The secondary windings of the supply transformer 1 are connected to the terminals 2, 3, bypass capacitors 4, 5. The load 6 is connected to the rectifiers 2, 3 via power thyristors 7.8, shunted by reverse diodes 9,10, and the secondary windings of pulse transformers I, 12 whose primary windings through auxiliary thyristors 13, 14 are connected to switching capacitors 15, 16 having a point connected to the cathode of the thyristor 13 and the anode of the thyristor 14. the voltage of the rectifier 2, and the capacitor-15 is charged to the voltage of two successively on The following rectifiers are 2 and 3 along the circuit: power output 2 - capacitor 15 - thyristor 14 - transformer primary winding 12 - minus power sup- ply 3. At the time interval corresponding to the width of the voltage pulse on the load, the thyristor 13 turns on. discharged through the primary winding of the transformer 11, and the capacitor 16 is charged to the total voltage of the rectifiers 2 and 3 along the circuit: plus rectifier 2 - the primary winding of the transformer 11 - thyristor 13 - capacitor 16 - minus vtr, l 3. Thus primary trans trance of the formator 11, the charge current of the capacitor 16 and the distributive current of the capacitor 15 flow. In the secondary winding of the transformer 11, a wcd is applied, directed against the opposite voltage of the detector 2, as a result, the reverse voltage is applied to the thyristor 7 and is turned off. The load inductance energy is discharged to capacitor 5 through diode 10. After the time of turning off the thyristor 7, the thyristor 8 turns on and voltage 6 is applied to load 6, i.e. the voltage on the load changes sign. To turn off the thyristor 8, the thyristor 14 is turned on, the capacitor 16 is discharged, and the capacitor 15 is charged through the primary winding of the transformer 12, in the secondary winding of which an emf is induced, opposite to the voltage of the top 3, causing the thyristor 8 to turn off . The average value of the voltage on the load varies in magnitude and direction by changing the time ratio of the on state of the power thyristors 7 and 8. The device also allows the asymmetric control law to be implemented. In this case, only one power thyristor 7 or 8 is switched, and the load is powered by a unipolar pulse voltage, the average value of which is regulated by changing the pulse width, i.e. change the time of the on state of the power thyristor. The invention is a device for pulse-width voltage control, containing capacitors locked by capacitors and connected to two sets of secondary windings of a supply transformer two high voltage wires connected anti-parallel to output terminals via serially connected secondary windings of pulse transformers, power thyristors shunted by reverse diodes, switching capacitors, characterized in that, in order to reduce switching losses and increase reliability, the primary The coils of the pulse transformers are connected via auxiliary thyristors to switching capacitors connected in series between the opposite poles of the rectifiers.

8V