SU1541722A1

SU1541722A1 - Device for controlling thyristor

Info

Publication number: SU1541722A1
Application number: SU874238421A
Authority: SU
Inventors: Юрий Николаевич Кияшко; Владимир Никандрович Сердюк; Юрий Георгиевич Лотоцкий
Original assignee: Днепропетровский институт инженеров железнодорожного транспорта
Priority date: 1987-04-28
Filing date: 1987-04-28
Publication date: 1990-02-07

Abstract

Изобретение относитс к электротехнике и может быть применено дл управлени тиристорами выпр мителей и автономных инверторов, а также дл управлени мощными транзисторами. Цель изобретени - обеспечение работы трансформатора по полному циклу петли гистерезиса при одновременном упрощении устройства. С этой целью параллельно вторичной обмотке 8 трансформатора 6 включены последовательно соединенные диод 12 и резистор 13. Таким образом при положительном напр жении на обмотке 8, достаточном дл пробо порогового элемента 11, происходит отпирание тиристора 9, при отрицательном напр жении ток будет протекать через диод 10, создава на нем падение напр жени и смеща управл ющий электрод тиристора 9 в обратном направлении. При напр жении положительной пол рности, но недостаточной дл пробо стабилитрона 11 амплитуды ток замыкаетс через диод 12 и резистор 13. В результате происходит посто нное перемагничивание сердечника трансформатора 6 и он работает по полному циклу петли гистерезиса. 3 ил.The invention relates to electrical engineering and can be applied to control thyristors of rectifiers and autonomous inverters, as well as to control powerful transistors. The purpose of the invention is to ensure the operation of the transformer over the full cycle of the hysteresis loop while simplifying the device. For this purpose, parallel to the secondary winding 8 of the transformer 6 are connected a series-connected diode 12 and a resistor 13. Thus, at a positive voltage on the winding 8, sufficient for the breakdown of the threshold element 11, the thyristor 9 is unlocked, and at a negative voltage the current will flow through the diode 10 creating a voltage drop across it and shifting the control electrode of the thyristor 9 in the opposite direction. When the voltage is positive polarity, but insufficient for the breakdown of Zener diode 11 amplitude, the current is closed through diode 12 and resistor 13. As a result, a constant reversal of the transformer 6 core occurs and it operates through a full hysteresis loop. 3 il.

Description

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Claims

Claim

A thyristor control device containing a transformer is “the primary winding of which is connected through a controlled key to a rectangular voltage source of rectangular shape, a shunt element connected between the intermediate terminal of the voltage source and the connection point of the controlled key and the primary winding of the transformer, the secondary winding of which is designed with one output for connected to the cathode of the thyristor and connected to the anode of the shunt diode, the cathode of which is designed to connect to the control elec the thyristor’s type, and is connected to the anode of the threshold element, characterized in that, in order to ensure the operation of the transformer for the full cycle of the hysteresis loop, the first and second resistors and an additional diode are introduced, and the cathode of the threshold element is connected to one terminal of the first resistor, the other terminal of which is connected with one terminal of the second resistor and another terminal of the secondary winding of the transformer, the other terminal of the second resistor is connected to the anode of the additional diode, the cathode of which is connected to the anode of the shunt diode.

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