SU726595A1

SU726595A1 - Adjustable transformer

Info

Publication number: SU726595A1
Application number: SU782656007A
Authority: SU
Inventors: Анатолий Ярославович Дорошкевич
Original assignee: Войсковая Часть 44388-Р/П
Priority date: 1978-08-11
Filing date: 1978-08-11
Publication date: 1980-04-05

Description

Изобретение относится к радиотехнике] и может быть использовано в различных радиотехнических устройствах, в частное- ти в радиоприемных устройствах.The invention relates to radio engineering] and can be used in various radio engineering devices, in particular in radio receivers.

Известны трансформаторы, используемые в радиотехнических установках для ⁵регулирования выходного напряжения, содержащие первичную, 'вторичную и подмагничивающую обмотки . Регулирование осуществляется изменением тока через · подмагничивакщую обмотку.Known transformers used in radio installations for ⁵ regulation of the output voltage, containing primary, secondary and magnetizing windings. Regulation is carried out by changing the current through a magnetizing winding.

Недостатками этого трансформатораявляются наличие больших полей рассеяния, что приводит к значительным потерям анергии сигнала, и большая потребляемая мощность от источника регулирования.The disadvantages of this transformer are the presence of large scattering fields, which leads to significant loss of signal anergy, and a large power consumption from the control source.

Известен также регулируемый трансформатор, содержащий первичную и вторичную обмотки, расположенные на магнитопроводяших сердечниках и охваченные объемным витком связи .Also known is an adjustable transformer containing primary and secondary windings located on magnetically conductive cores and covered by a volume loop of communication.

Эго устройство является наиболее близким по технической сущности к изобретению.This device is the closest in technical essence to the invention.

Для обеспечения плавного регулирования выходного напряжения в полость объемного витка введены две регулирующие катушки, отделенные от первичной и вторичной обмоток экранными шайбами.To ensure smooth regulation of the output voltage, two control coils are introduced into the cavity of the surround coil, separated from the primary and secondary windings by screen washers.

Данной системе регулирования присущ ряд недостатков: возрастают габариты устройства по сравнению с обычным трансформатором с объемным витком связи; увеличиваются поля рассеяния, что приводит к снижению коэффициента трансформации и пределов регулирования.This regulation system has a number of disadvantages: the dimensions of the device increase compared to a conventional transformer with a surround communication loop; scattering fields increase, which leads to a decrease in the transformation coefficient and the limits of regulation.

Целью изобретения является уменьшение габаритов и расширение пределов ' регулирования.The aim of the invention is to reduce the size and the expansion of the limits of regulation.

Это достигается тем, что регулируемый трансформатор, содержащий первичную и вторичную обмотки, расположенные на магнитопроводящих сердечниках и охваченные объемным витком связи, снабжен двумя встречно включенными диодами, а объемный виток связи выполнен с разрывом, к торцам которого подключены встречно включенные диоды, при этом к общей точке соединения диодов подключен один выходной конец, а к объемному витку - другой выходной конец для подключения регулируемого источника постоянного напряжения. ₅ This is achieved by the fact that an adjustable transformer containing primary and secondary windings located on magnetic conductive cores and covered by a three-dimensional communication coil is equipped with two counter-connected diodes, and the three-dimensional communication coil is made with a gap, to the ends of which are connected counter-connected diodes, while to the common one output end is connected to the diode connection point, and the other output end is connected to the surround coil to connect an adjustable constant voltage source. ₅

На фиг. 1 дана электрическая схема •предлагаемого устройства; на фиг. 2 устройство, общий вид.In FIG. 1 is an electrical diagram of the proposed device; in FIG. 2 device, general view.

Оно содержит входную 1 и выходную 2 обмотки, намотанные на ферритовых ₁₀тороидальных сердечниках 3, пометен-, ных в металлический стакан 4 и разделенных диафрагмой 5. Для замыкания петли связи служит стяжной болт 6, в разрыв которого встречно включены регулирую- 15 щие диоды 7, которые используются в качестве переменного сопротивления. Управление имперансом последних осуществляется через сквозное отверстие 8 от регулируемого источника постоянного тока, 20 один конец которого соединен с общей точкой включения диодов 9, а второй с объемным витком.It contains input 1 and output 2 windings wound on ferrite ₁₀ toroidal cores 3, marked in a metal cup 4 and separated by a diaphragm 5. To close the communication loop, there is a coupling bolt 6, into the gap of which the regulating diodes 7 are counterclockwise connected which are used as variable resistance. The control of the impersonality of the latter is carried out through a through hole 8 from an adjustable constant current source, 20 one end of which is connected to a common point of inclusion of diodes 9, and the other with a surround coil.

. Устройство работает следующим образом. ²⁵ . The device operates as follows. ²⁵

Напряжение с частотой сигнала, поступая на первичную обмотку, возбуждает вокруг нее электромагнитное поле, которое Приводит к появлению тока на внутренней поверхности цилиндрйческого ста- ³⁰кана и тока противоположного направления в стяжном болте, что возбуждает напряжение с частотой сигнала в выходной обмотке трансформатора. Изменяя величину тока через диоды, можно в широких 35 пределах регулировать их сопротивление, 'а следовательно и степень связи вход ной и выходной обмоток, т.е. величину выходного напряжения.The voltage from the frequency signal, acting on the primary coil to excite an electromagnetic field around it, which leads to the appearance of a current on the inner surface ³⁰ tsilindrycheskogo sta- kana and current of opposite direction to the clamping bolt, that excites voltage with a frequency signal in the output winding of the transformer. By changing the magnitude of the current through the diodes, it is possible to regulate their resistance over a wide range of 35, and therefore the degree of coupling of the input and output windings, i.e. output voltage value.

Предложенное устройство при размерах, не отличающихся от размеров обычного трансформатора с объемным витком связи, позволяет не только расширить пределы регулирования выходного напряжения при меньших потерях и меньшей мощности* от* Источника управления, но и увеличить степень развязки цепи сигнала и цепи управления.The proposed device, with dimensions not different from the dimensions of a conventional transformer with a three-dimensional communication loop, allows not only to expand the limits of regulation of the output voltage with lower losses and lower power * from * the Control Source, but also to increase the degree of isolation of the signal circuit and the control circuit.

Claims

The invention relates to radio engineering and can be used in various radio engineering devices, in particular, in radio receiving devices. Transformers used in radio installations for regulating the output voltage, containing primary, secondary, and submarine windings I, are known. Regulation is made by changing the current through the biasing winding. The disadvantages of this transformer are the presence of a large pipat spread, which leads to a significant loss of signal energy, and a large power consumption from the control source. Also known is an adjustable transformer containing primary and secondary windings located on magnesium conductive cores and covered by a volumetric loop of connection Z. This device is the closest to the technical essence of the invention. To ensure smooth control of the output voltage, two regulating voltages are introduced into the cavity of the volumetric loop. coils separated from the primary and secondary windings screen washers. This system of regulation is inherent in a number of disadvantages: the dimensions of the device increase in comparison with a conventional transformer with a volumetric loop connection; the scattering field increases, resulting in lower transformation ratios and control limits. The aim of the invention is to reduce the size and range of regulation. This is achieved by the fact that an adjustable transformer containing primary and secondary windings, located on the magnetically conductive cores and covered by a volumetric coil of communication, is equipped with two oppositely connected diodes, and the volumetric coil of communication is made with a gap, to the ends of which are connected oppositely diopes, with This is to the common point of the connection of the diodes podklyuzh1111 one output end, and to the volumetric circuit - the other output end for the connected 1 adjustable source of constant voltage. FIG. 1 is given the electrical circuit of the proposed device; in fig. 2 device, general view. It contains input 1 and output 2 windings, wound on ferrite toroidal cores 3, marked in a metal cup 4 and separated by a diaphragm 5. To close the loop of connection, there is a clamping bolt 6, in the gap of which are included control diodes 7, which are used as variable resistance. The control of the impedance of the latter is carried out through a through hole 8 from an adjustable source of direct current, one end of which is connected to the common switching point of the diodes 9 and the second to the volumetric turn. . The device works as follows. The voltage at the frequency of the signal applied to the primary winding excites an electromagnetic field around it, which leads to the appearance of a current on the inner surface of the cylindrical stack and a current of the opposite direction in the clamping bolt, which excites the voltage at the output winding of the transformer . By varying the amount of current through the diodes, it is possible to regulate within wide limits their resistance and, consequently, the degree of coupling of the input and output windings, i.e. value of the output voltage. The proposed device with dimensions not differing from the dimensions of a conventional transformer with a volume turn in sight, allows not only to expand the limits of output voltage control with less losses and less ontransference control cable, but also to increase the degree of isolation of the signal and control circuits. Claims of the Invention An adjustable transformer containing primary and secondary windings located on magnetically conductive cores and covered by a volumetric loop of communication, characterized in that, in order to reduce the size and extend the control limits, it is equipped with two counter-connected diodes, and a volumetric loop of connection is made with a discontinuity, to the ends of which the opposite-connected diodes are connected, while one output end is connected to the common connection point of the diodes, and the other output end for connecting Adjustable constant voltage source. Sources of information taken into consideration in the examination 1. USA of US 9 3571699, cl. 323-48, 1971.

2. USSR author's certificate K 44844О, cl. H 01 F 29/14, 1971.

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