SU944010A1

SU944010A1 - Thyristor control device

Info

Publication number: SU944010A1
Application number: SU803009019A
Authority: SU
Inventors: Александр Васильевич Иванов; Михаил Михайлович Мульменко; Петр Семенович Ройзман; Альберт Хубутдинович Узянбаев
Original assignee: Уфимский авиационный институт им.Орджоникидзе
Priority date: 1980-11-26
Filing date: 1980-11-26
Publication date: 1982-07-15

Description

1one

Изобретение относитс к преобразовательной технике и мйжет быть использовано в системах управлени тиристорными автономными инверторами и преобразовател ми частоты.The invention relates to a converter technique and can be used in control systems for autonomous thyristor inverters and frequency converters.

Известны устройства дл управлени тиристорами, содержащие цепь из последовательно соединенных конденсаторов , подсоединенную через дроссель к источнику тока, и цепи из последовательно соединенных тиристоров и импульсных трансформаторов, кажда из которых шунтирует соответствующий конденсатор Tl.Thyristor control devices are known, comprising a circuit of series-connected capacitors connected via a choke to a current source, and a chain of series-connected thyristors and pulse transformers, each of which bypasses the corresponding capacitor Tl.

Недостатком известных устройств вл етс невысока надежность,обусловленна низкой помехоустойчивостью.A disadvantage of the known devices is the low reliability due to low noise immunity.

Наиболее близким к предлагаемому вл етс устройство дл управлени тиристорами, содержащее цепь из последовательно соединенных конденсаторов по количеству тиристоров, ;подсоединенную одним зажимом черезClosest to the present invention is a device for controlling thyristors, comprising a circuit of series-connected capacitors by the number of thyristors,; connected with one clip through

последовательно соединенные диод иseries diode and

дроссель к первой клемме дл подклю чени источника тока и другим зажимом - к второй его клемме, цепи из последовательно соединенных тиристоров и трансформаторных распределителей импульсов, каждый из которых имеет входную и выходную обмотки, кажда цепь из последовательно включенных тиристора и входной обмотки трансформаторного распределител a choke to the first terminal for connecting the current source and another terminal to its second terminal, a circuit of series-connected thyristors and transformer pulse distributors, each of which has an input and output windings, each circuit of a series-connected thyristor and an input winding of the transformer distributor

10 подсоединена параллельно соответствующему конденсатору, выходные обмотки трансформаторных распределителей подсоединены к клеммам дл подключени соответствующих тирис )5 торов, и демпфирующие RC-цепи по количеству тиристоров, кажда из которых состоит из последовательно соединенных резистора и конденсатора 2 .10 is connected in parallel to the corresponding capacitor, the output windings of the transformer distributors are connected to the terminals for connecting the corresponding 5 tori, and the damping RC circuits by the number of thyristors, each of which consists of a series-connected resistor and capacitor 2.

2020

Claims

A disadvantage of the known device is low reliability due to the low noise immunity 3 to the action of impulse noise in the power supply circuit. The purpose of the invention is to increase the reliability of the device. The goal is achieved by the fact that the damping KS circuits are connected in parallel to the input windings of the corresponding transformer pulse distributors. The drawing shows a circuit diagram of a device for controlling thyristors. The control device contains a circuit of series-connected capacitors 1 and 2, diode 3, choke A. Parallel to capacitors 1 and 2, thyristors 5 and 6 are connected with series-connected input windings of the transformer distributors 7 and 8 pulses, each of which is bridged by a chain of series-connected corresponding resistors 9 , 10 and capacitors 11,12. The device works as follows. When voltage is applied from the current source, capacitors 1 and 2 are charged. At the moment of switching on the thyristor 5, the capacitor 1, discharging through the input winding of the transformer distributor 7, produces current pulses in its output winding. Similarly, when the thyristor 6 is turned on, current pulses are generated in the output winding of the distributor 8. Diode 3 prevents the discharge of capacitors 1 and 2 to the current source. The direct voltage build-up voltage on the thyristors is limited, since the damping RC circuits, made on resistors 9, 10 and capacitors 11 and 12, are connected to the terminals of thyristors 5 and 6 through capacitors 1 and 2. The high noise immunity of the device is ensured by the fact that when charging capacitor 1 and 2 from the current source, the formation of a false pulse does not occur due to the absence of current through the transformer distributors 7 and 8. The absence of false pulses reduces the thyristors off time and reduces v chains loss control thyristors that further improves the reliability of the device. An apparatus for controlling thyristors, comprising a circuit of series-connected capacitors by the number of thyristors, connected by one clamp through a series-connected diode and a choke to the first terminal for connecting a current source and the other clip to its second terminal, a circuit of series-connected thyristors and transformer pulse distributors, each of which has an input and output windings, each circuit of a series-connected thyristor and an input winding transf The distributor distributor is connected in parallel with the respective capacitor, the output windings of the transformer distributors are connected to the terminals for connecting the corresponding thyristors, and the damping RC circuits by the number of thyristors, each of which consists of a series-connected resistor and capacitor, characterized in that, in order to increase reliability, RC damping circuits are connected in parallel to the input windings of the corresponding transformer pulse distributors. Sources of information taken into account during the examination 1.Vishnevsky AM and others. Power ion and semiconductor devices. M., 1975, p. 252.

2.Ki mov R.N. et al. Peculiarities of operation of an inverter loaded on an induction melting furnace connected between input chokes. Proceedings of UDI, vol. 91, Sat 5, 1975 ,. pp.63-66.