SU849390A1

SU849390A1 - Shaper of pulses for control of thyristors

Info

Publication number: SU849390A1
Application number: SU792831807A
Authority: SU
Inventors: Игорь Иванович Ковалевский
Original assignee: Предприятие П/Я А-7904
Priority date: 1979-10-25
Filing date: 1979-10-25
Publication date: 1981-07-23

Description

Изобретение относится к технике и может быть использовано для управления тиристорами в технике связи:.The invention relates to technology and can be used to control thyristors in communication technology :.

Известны формирователи импульсов управления тиристорами с выходным импульсным трансформатором, первичная ^sобмотка которого подключена к источнику питания через управляемый ключ, например транзистор, а размагничивающая обмотка подключена к источнику питания чере!з резистор или дроссель [1]. ”Thyristor control pulse generators with an output pulse transformer are known, the primary ^s winding of which is connected to a power source via a controlled key, for example, a transistor, and the demagnetizing winding is connected to a power source through a resistor or inductor [1]. ”

Недостатком устройства является низкая экономичность формирователя за счет постоянного потребления мощности размагничивающей обмотки.The disadvantage of this device is the low efficiency of the shaper due to the constant power consumption of the demagnetizing winding.

Наиболее близким по технической сущности к предлагаемому является формирователь импульсов управления тиристорами, содержащий импульсный трансфор->₀матор, основная и размагничивающая обмотки которого одним выводом соединены с одним полюсом источника питания, а вторыми выводами через транзис2 торы соединены с другим полюсом источника питания DOThe closest in technical essence to the proposed one is a thyristor control pulse generator containing a pulse transformer -> ₀ , the main and demagnetizing windings of which are connected to one pole of the power source by one terminal, and connected to the other pole of the DO power source through transistors2 by second terminals

Недостатком известного формирователя является его сложность из-за необходимости иметь Отдельную систему управления транзистором размагничивающей обмотки.A disadvantage of the known shaper is its complexity due to the need to have a separate control system of the transistor of the demagnetizing winding.

Цель изобретения - упрощение формирователя . 'The purpose of the invention is the simplification of the shaper. ''

Поставленная цель достигается тем, что формирователь импульсов управления тиристорами снабжена стабилитроном, включенным между базой транзисто- . ра размагничивающей обмотки и коллектором транзистора основной обмотки.This goal is achieved by the fact that the thyristor control pulse generator is equipped with a zener diode connected between the transistor base. demagnetizing winding and the collector of the transistor of the main winding.

На чертеже приведена принципиальная схема формирователя.The drawing shows a schematic diagram of the shaper.

Формирователь импульсов управления тиристорами содержит импульсный трансформатор 1, основная 2 и размагничивающая 3 обмотки которого .соединены с источником питания 4 одним выводом непосредственно, а вторым через транзисторы 5 и 6. База транзистора 6 размагт.The thyristor control pulse generator contains a pulse transformer 1, the main 2 and demagnetizing 3 windings of which are connected to the power supply 4 with one output directly and the second through transistors 5 and 6. The base of the transistor 6 is unmagnetized.

з 849390 4 ничивающей обмотки 3 соединена с кол-п лектором транзистора 5 основной обмотки 2 через стабилитрон 7.З 849390 4 of the winding 3 is connected to the number of lecturers of the transistor 5 of the main winding 2 through the zener diode 7.

Формирователь работает следующим ⁴образом. ₅ The shaper works as follows ⁴ . ₅

В исходном состоянии при ОТСУТСТВИИ импульса управления транзистор 5 за'перт, транзистор 6 также заперт, так как напряжение пробоя стабилитрона 7 выше напряжения источника питания 4. При по- ₎₀даче на базу транзистора 5 импульса управления Uy этот транзистор открывается и в обмотке 2 трансформаторе 1 протекает ток, намагничивающий сердечник трансформатора 1 и индуцирующий выходной импульс напряжения U_u . По' окончании импульса Uy транзистор 5 запирается, ток в обмотке 2 прерывается. За счет энергии,накопленной в сердечнике трансформатора,го напряжение на коллекторе транзистора . 5 возрастает до напряжения пробоя стабилитронг. 7. Импульс тока через стабилитрон 7 включает транзистор 6. По обмотке 3 протекает ток, перемагничи- 25 вающий сердечник трансформатора 1. Длительность протекания тока через обмотку .3 определяется магнитной энергиеи, запасенной в сердечнике трансформатора 1 при формировании рабочего зо импульса U, т.е. временем полного перемагничивания сердечника. После перемагничивания изменение индукции сердечника, следовательно и ЭДС обмотки 2 равны нулю, напряжение на кол~з5 лекторе транзистора 5 спадает до на пряжения источника питания, стабили- , трон 7, транзистор 6 и обмотка 3 обесточиваются. Формирователь, приходит в исходное состояние.In the initial state in the absence of a pulse control 5 za'pert transistor, the transistor 6 is also locked, since the breakdown voltage of the zener diode 7 above voltage source 4. When _{po-) 0} Uy for giving control pulse the base of transistor 5 is opened and the transistor in the winding 2 transformer 1 flows a current magnetizing the core of transformer 1 and inducing an output voltage pulse U _u . At the end of the pulse Uy, the transistor 5 is turned off, the current in the winding 2 is interrupted. Due to the energy stored in the core of the transformer, the voltage at the collector of the transistor. 5 rises to Zener voltage breakdown. 7. The current pulse through the zener diode 7 turns on the transistor 6. A current flows through the winding 3, magnetizing the core of the transformer 1. The duration of the current flow through the winding .3 is determined by the magnetic energy stored in the core of the transformer 1 during the formation of the operating pulse U, t. e. time of complete magnetization reversal of the core. After magnetization reversal, the change in the induction of the core, and therefore, the EMF of winding 2, is equal to zero, the voltage at the collector ~ 5 of the transistor 5 decreases to the voltage of the power supply, stabilizer, throne 7, transistor 6, and winding 3 are de-energized. Shaper, returns to its original state.

.Таким образом, благодаря применению стабилитрона отпадает необходимость в отдельной системе управления транзистором размагничивающей обмотки, и формирователь упрощается.Thus, thanks to the use of a zener diode, there is no need for a separate control system for the demagnetizing winding transistor, and the shaper is simplified.

Claims

(54) CONTROLLER PULSE FORMER The invention relates to a technique and can be used for controlling thyristors in a communication technique ;. Thyristor control pulse drivers with an output pulse transformer are known, the primary winding of which is connected to a power source via a control key, such as a transistor, and the demagnetizing winding is connected to a power source via a black resistor or inductor. The low cost of the driver is because of the low voltage consumption of the driver. demagnetizing winding. The closest in technical essence to the present invention is a thyristor control pulse driver containing a pulse transformer, the main and demagnetizing windings of which are connected to one pole of the power source by one terminal, and the tori are connected to the other pole of the power source by the second leads its complexity is due to the need to have a separate control system for the demagnetizing winding transistor. The purpose of the invention is to simplify the former. The goal is achieved by the fact that the thyristor control pulse generator is equipped with a zener diode connected between the base transistor. ra demagnetizing winding and the collector of the transistor of the main winding. The drawing is a schematic diagram of the former. The thyristor control pulse generator contains a pulse transformer I, the main 2 and demagnetizing 3 windings of which are connected to the power source 4 one time directly and the second through transistors 5 and 6. The base of the transistor 6 of the demagnetizing winding 3 is connected to the collector of transistor 5 of the main winding 2 through the Zener diode 7. The shaper operates as follows. In the initial state, when there is NO control pulse, the transistor 5 is locked, the transistor 6 is also locked, because the Zener diode voltage is and 7 is higher than the power supply voltage 4. When a control pulse Uy is applied to the base of transistor 5, this transistor opens and a current in the winding 2 of the transformer 1 1 magnetizes the core of the transformer 1 and induces an output voltage pulse Uu. At the end of the pulse U, the transistor 5 is closed, the current in the winding 2 is interrupted. Due to the energy accumulated in the core of the transformer, the voltage across the collector of transistor 5 increases to the voltage of the breaker voltage. 7. The current pulse through the Zener diode 7 turns on the transistor 6. A current flows through the winding 3, the remagnetization core of the transformer 1. The current flowing through the winding .3 is determined by the magnetic energy stored in the core of the transformer 1 when forming the working pulse and J,, those. the time of complete magnetic reversal of the core. After remagnetization, the change in the induction of the core, and hence the EMF of the winding 2, is zero, the voltage on the collector of the transistor 5 drops to the load of the power source, stabilized; the throne 7, the transistor 6 and the winding 3 are de-energized. Shaper comes to its original state. Thus, by employing a zener diode, the need for a separate demagnetizing winding control system is no longer necessary, and the driver is simplified. The claims of the thyristor control pulse shaper containing a pulse transformer, the main and demagnetizing windings of which are connected by one terminal to one pole of the power source and the second terminals through transistors connected to the other pole of the power source, on tl and h-s and and so that, in order to simplify, it is equipped with a zener diode, included between the base of the demagnetizing winding transistor and the collector of the main winding transistor. Sources of information taken into account in the examination 1.Berkovich E.I and others. Semiconductor detectors. M., Energie, 1978, p. 231-232, fig. 4-42.

2. Moin V.S., Laptev N.N. Stabilized transistor converters. M., Energia 1972, p. 198, fig. 7-1.