SU955345A1

SU955345A1 - Bridge thyristor inverter having device for checking valve serviceability

Info

Publication number: SU955345A1
Application number: SU802961269A
Authority: SU
Inventors: Николай Ильич Джус
Original assignee: Московское Отделение Научно-Исследовательского Института Постоянного Тока
Priority date: 1980-07-15
Filing date: 1980-07-15
Publication date: 1982-08-30

Description

Изобретение относитс к кс «мутационной технике и может быть использовано в устройствах дл контрол вентилей тиристорных инверторов напр жени .The invention relates to a CC "mutation technique and can be used in devices for controlling the valves of thyristor voltage inverters.

Известны устройства цл контрол вентилей тиристорных инверторов напр жени , содержащие вы вительный орган, резистивный делитель напр жени и клеммы дл подключени источника тока и нагрузки iQ .There are known devices for controlling the thyristor voltage inverter valves, containing an impressive organ, a resistive voltage divider and terminals for connecting a current source and an iQ load.

Недостатком известных устройств вл етс невысока точность срабатывани и наличие энергетических потерь, обусловленные наличием резистивного делител напр жени .A disadvantage of the known devices is the low accuracy of operation and the presence of energy losses due to the presence of a resistive voltage divider.

Наиболее близким к предлагаемому вл етс мостовой тиристорный инвертор с устройством дл контрол исправности вентилей, содержащий вы вительные органы, клеммы дл подключени источника тока .и выходную клемму , между которыми включены попарнопараллельно соединенные рабочие и коммутирующие плечи инвертора, состо щие из повентильно. коммутируемых последовательно соединенных вентилей 2 .The closest to the present invention is a bridge thyristor inverter with a device for monitoring the operability of the valves, containing expansive bodies, terminals for connecting a current source and an output terminal, between which are connected parallel-connected workers and commutating shoulders of the inverter, consisting of ventilno. switched series-connected valves 2.

Недостатком известного инвертора вл етс наличие энергетических потерь , обусловленное наличием резистивного делител напр жени .A disadvantage of the known inverter is the presence of energy losses due to the presence of a resistive voltage divider.

Цель изобретени - упрощение и снижение потерь энергии.The purpose of the invention is to simplify and reduce energy losses.

Поставленна цель достигаетс тем, что, в мостовом инверторе каждый из вы вительных органов подключен своими выводами через одинаковое число вентилей соответственно рабочего и The goal is achieved by the fact that, in the bridge inverter, each of the distinguishing bodies is connected by its outputs through the same number of valves, respectively

10 коммутирующего плеч одной и той же фазы инвертора к выходной клемме.10 switching shoulders of the same phase of the inverter to the output terminal.

На фиг. 1 приведена принципиальна электрическа схема однофазного мостового тиристорного инвертора соFIG. 1 shows the basic electrical circuit of a single-phase thyristor bridge inverter with

15 средней точкойс устройством дл контрол исправности вентилей на фиг. же, одной фазы многофазного инвертора .15 by the middle point with the device for monitoring the operability of the valves in FIG. same, single phase multiphase inverter.

Инвертор (фиг. 1) содержит клеммы Inverter (Fig. 1) contains terminals

Claims

20 for connecting the working thyristors 1, diodes 2 and terminals for connecting switching nodes in the form of capacitors 3, reactors 4, thyristors 5, diodes 6, terminals for connecting the current source 7 and indicating bodies 8. Fig. 1, the working arm and the corresponding commutator are connected to the same pole of the source 7, and in FIG. 2 - to the opposite30. nym. The inverter works as follows. Thyristors 1 and 5 in a certain sequence are supplied with control pulses. The voltages on the working and switching valves of the shoulders of the inverter are the same in size and duration, except for small switching intervals that are a few percent of the repetition period. Thus, these stresses are practically identical. Since the number of valves in both shoulders - switching and working - is the same, there is no signal at the output of the powerful organs 8. When one or several valves exit from one of the arms, a greater voltage is applied to the remaining valves, and a signal appears at the input of the end-organs 8, leading to their activation. The use of the invention provides a simplified design of the device for monitoring the operability of the valves and reduces energy losses, since resistive voltage dividers in the inverter arms are not required. Claims jj, and in order that, in order to simplify and reduce energy losses, each of the distinguishing organs is connected by its own conclusions through the same number of gates tween the working arms and the switching of the same phase to the inverter output terminal. Sources of information taken into account in the examination 1. USSR author's certificate number 225302, cl. H 02 H 7/10, 1968.

2. Authors certificate of the USSR 630702, cl. H 02 H 7/10, 1978.