SU815918A1

SU815918A1 - Symmetric semiconductor switching device

Info

Publication number: SU815918A1
Application number: SU772447199A
Authority: SU
Inventors: Леонид Абрамович Фурер
Original assignee: Опытный Завод Института Прикладнойфизики Ah Молдавской Ccp
Priority date: 1977-01-24
Filing date: 1977-01-24
Publication date: 1981-03-23

Description

(54) СИММЕТРИЧНОЕ ПОЛУПРОВОДНИКОВОЕ ПЕРЕКЛЮЧАЮЩЕЕ УСТРОЙСТВО(54) SYMMETRIC SEMICONDUCTOR SWITCHING DEVICE

Изобретение относитс к импульсной технике и предназначено дл применени в устройствах автоматики и в частности дл тиристорного привода переменного тока.The invention relates to a pulse technique and is intended for use in automation devices and in particular for an thyristor AC drive.

Известны переключающие устройства, работающие на посто нном токе 1.Switching devices operating on direct current 1 are known.

Наиболее близким по технической сущности вл етс , переключающее устройство, содержащее .первый делитель напр жени питани на резисторах, два транзистора р-п-р и п-р-п проводимостей, причем коллектор одного соединен с базой другого, а средн точка делител напр жени питани подсоединен а; к базе р-п-р транзистора 2.The closest in technical essence is a switching device containing a first power supply voltage divider across resistors, two pnp transistors and a pnp conductance, the collector of one being connected to the base of the other, and the middle point of the voltage divider power supply connected; to the base transistor transistor 2.

Недостаток заключаетс в том, что оно не может работать при напр жении питани и управлени обеих пол рностей.The disadvantage is that it cannot operate under the voltage of the supply and control of both polarities.

Целью изобретени вл етс расщирение функциональных возможностей путем обеспечени его работы при напр жении питани и управлени обеих пол рностей.The aim of the invention is to extend the functionality by ensuring its operation under power supply voltage and controlling both polarities.

Поставленна цель, достигаетс тем, что вход устройства образован одной клеммой входа, введенного выпр мительного моста и общей шиной и подключен к эмиттерам транзисторов со стороны выхода выпр мительного моста, выход устройства образован другой клеммой входа выпр мительного моста и общей щиной, к которой подключен одной клеммой источник питани , а параллельно первому делителю напр жени питани через разделительные диоды, включению последовательно с резисторами, подключен образованный последовательно включенными резисторами и разделительными диодами второй делитель напр жени , средн точкаThe goal is achieved by the device input being formed by one input terminal, input of a rectifying bridge and a common bus and connected to the emitters of transistors on the output side of the rectification bridge, the device output is formed by another input bridge of the rectifying bridge and the total thickness to which the power supply terminal, and parallel to the first voltage divider through dividing diodes, connected in series with resistors, connected formed by series-connected resistors and dividing diodes second voltage divider, mid point

которого подключена к базе п-р-п транзистора .:which is connected to the base of pnp transistor.:

На чертеже представлена электрическа схема предлагаемого устройства.The drawing shows the electrical circuit of the proposed device.

Симметричное полупроводниковое переключающее устройство содержит два транзиСтора 1, 2 соответственно р-п-р и п-р-п проводимостей, два делител напр жени , плечи которых образованы резисторами 3 6 и разъединительными диодами 7-10, а также выпр мительный мост, образованный диодами 11 - 14.Symmetric semiconductor switching device contains two transistors 1, 2, respectively, pnp and npp conductivities, two voltage dividers, the shoulders of which are formed by resistors 3 6 and disconnecting diodes 7-10, as well as a rectifying bridge formed by diodes 11 - 14.

Claims

The device works as follows. When the input voltage under the coherence coincides with the supply voltage and when the potential of the point a is reached, both transistors 1, 2 open, and the potential of the point a of the divider begins to decrease, which provides an internal positive feedback, facilitating abrupt unlocking two transistors. A voltage appears at the output of the device. When changing the polarity of the supply voltage and the input, another divider, another pair of diodes of the rectifying bridge, starts to work, ensuring the change of the polarity of the output voltage. The proposed symmetric semiconductor switching device provides operation at the supply voltage and control of both polarities at high stability of the switching voltage. Invention Symmetric semiconductor switching device containing the first power supply voltage divider on resistors, two transistors pnp and pnp conductivities, the collector of one connected to the base of the other, and the middle point of the divider iW5, power supply connected to A base transistor transistor, characterized in that, in order to extend the functionality by ensuring its operation under the supply voltage and controlling both polarities, the input of the device is formed by one input terminal introduced by rectifiers The common bridge and common emitters are connected to the emitters of the transistors on the output side of the rectifying bridge, the output of the device is formed by a different terminal inputs of the rectifying bridge and a common bus to which the power supply is connected with one terminal and parallel to the first voltage divider in series with resistors, connected formed by series-connected resistors and separation diodes, the second voltage divider, the midpoint of which is connected to the base of the pnp transit torus. Sources of information taken into account in the examination 1. Vazhenin 3. P. and others. Transistor pulse generators of a millisecond range. M., Soviet Radio, 1974, pp.11 - 12.

2.Labuntsov V.A. and others. Thyristors. Directory. M., “Energie, 1971, p. 19-20.