SU817929A1

SU817929A1 - Ac-to-dc converter

Info

Publication number: SU817929A1
Application number: SU792766416A
Authority: SU
Inventors: Александр Афанасьевич Яценко; Юрий Дмитриевич Татаринов
Original assignee: Предприятие П/Я В-8639
Priority date: 1979-05-16
Filing date: 1979-05-16
Publication date: 1981-03-30

Description

Изобретение относится к области преобразовательной техники и может быть использовано при электропитании различных устройств, сThe invention relates to the field of converting technology and can be used for powering various devices, with

Известны преобразователи переменного тока в постоянный, обеспечивающие двенадцатипульсное выпрямление и содержащие один трехфаэный трансформатор [1] и’[2]. 'Known AC to DC converters, providing twelve-pulse rectification and containing one three-phase transformer [1] and ’[2]. ''

Однако известные преобразователи не обеспечивают необходимой выходной мощности.However, the known converters do not provide the required output power.

Известен преобразователь переменного тока в постоянный, содержащий два трехфазных трансформатора с двумя группами обмоток- каждый, причем первая из групп обмоток соединена в звезду и подключена к входным выводам а вторая - к диагонали переменного тока выпрямительных мостов, соединен- 20 ных последовательно и подключенных по постоянному току к выходным выводам [3] .A known AC-to-DC converter containing two three-phase transformers with two groups of windings is each, the first of the winding groups being connected to a star and connected to the input terminals, and the second to the diagonal of the rectifier bridge AC currents connected in series and connected by constant current current to the output terminals [3].

Недостатком известного преобразователя является необходимость в двух “ типах трансформаторов.A disadvantage of the known converter is the need for two “types of transformers.

Цель изобретения - унификация трансформаторов.The purpose of the invention is the unification of transformers.

Поставленная цель достигается тем, что каждый из трансформаторов 30 снабжен дополнительной группой обмоток, при этом дополнительная группа обмоток первого трансформатора соединена последовательно со второй группой обмоток второго трансформатора и образует с ней треугольник; а дополнительная группа обмоток второго трансформатора соединена последовательно со второй группой обмоток первого трансформатора и образует с ней звезду.'This goal is achieved in that each of the transformers 30 is equipped with an additional group of windings, while an additional group of windings of the first transformer is connected in series with the second group of windings of the second transformer and forms a triangle with it; and an additional group of windings of the second transformer is connected in series with the second group of windings of the first transformer and forms a star with it. '

На чертеже приведена принципиальная схема преобразователя.The drawing shows a schematic diagram of a converter.

Устройство содержит фазные зажимы А, В и С питающей сети, первичные обмотки 1 и 2 первого и второго трансформаторов, вторичные обмоткиThe device contains phase clamps A, B and C of the supply network, primary windings 1 and 2 of the first and second transformers, secondary windings

3- 6 трансформаторов, первый 7 и второй 8 вентильные тиристорные мосты,3-6 transformers, the first 7 and second 8 valve thyristor bridges,

В каждом из трансформаторов вторичные обмотки состоят из двух частей, отличающихся друг от друга по числу витков в ~/з раз (обмотки 4 и 5/, а вторая часть - треугольником.In each of the transformers, the secondary windings consist of two parts, differing from each other in the number of turns by a factor of / / 3 (windings 4 and 5 /, and the second part by a triangle.

Обе части вентильных обмоток одного трансформатора последовательно (согласно, пофазно) соединены с соответствующими частями вентильных обмоток другого трансформатора (3 сBoth parts of the valve windings of one transformer are connected in series (as per phase) to the corresponding parts of the valve windings of another transformer (3 s

4- 6), части вентильных обмоток 3 и Б соединены треугольником, а части вентильных обмоток 4 и 5 соединены звездой, что обозначает режим двенадцатипульсного выпрямления, при протекании токов по обмоткам трансформаторов .4-6), parts of valve windings 3 and B are connected by a triangle, and parts of valve windings 4 and 5 are connected by a star, which indicates the twelve-pulse rectification mode, when currents flow through the transformer windings.

Claims

The invention relates to the field of converter equipment and can be used for powering various devices. AC-to-DC converters are known that provide two-pulse-waveform and contain one three-phase transformer l. However, the known converters do not provide the necessary output power. The known AC-DC converter is constant, the contents of two three-phase transformers with two groups of windings are each, the first of the groups of windings connected to a star and connected to the input terminal and the second to the diagonal of the AC rectifier bridges connected in series and connected DC to output pins 3. A disadvantage of the known transducer is the need for two types of transformers. The purpose of the invention is the unification of transformers. The goal is achieved by the fact that each of the transformers is provided with an additional group of windings, and an additional group of windings of the first transformer is connected in series with the second group of windings of the second transformer and forms a triangle with it; and an additional group of windings of the second transformer is connected in series with the second group of windings of the first transformer and forms a star with it. The drawing shows a schematic diagram of the converter. The device contains phase clips A, B and C of the power supply network, primary windings 1 and 2 of the first and second transformers, secondary circuits 3-6 transformers, the first 7 and second 8 valve thyristor bridges. In each of the transformers, the secondary brackets consist of two parts, differing from each other in the number of turns by - {3 times (windings 4 and 5, and the second part is a triangle. Both parts of the valve windings of one transformer are sequentially (according to phase) connected to the corresponding parts of the valve windings of another transformer (3 s 4- 6 ), the parts of the valve windings 3 and b are connected by a triangle, and the parts of the valve windings 4 and 5 are connected by a star, which indicates the two-stroke pulsation mode, when currents flow through the transformer windings. Formula AC to DC converter containing two three-phase transformers each with two groups of windings, the first of the groups of windings being connected to the star and connected to the input terminals, and the second to the diagonal of the variable, then thermal bridge bridges connected in series and connected direct current to the output pins, characterized in that, in order to unify the transformers, each transformer is equipped with an additional group of windings, while an additional group of windings of the first transformer is connected in series with the second group of windings of the second transformer and forms a triangle with it, and an additional group of windings of the second transformer is connected in series with the second group of windings of the first transformer and forms a star with it. Sources of information taken into account in the examination 1. Posso AV - Schemes and modes of transmission of direct current. L., Energie, 1973.

2.Groys E.G. Perspective applications of power transmissions and direct current inserts. Electricity, 1979, No. 3, p. 1-6.

3. USSR author's certificate number 114549, cl. H 02 M 7/06, 1958.