SU997017A1

SU997017A1 - Converter of voltage source into source with square volt-ampere characteristic

Info

Publication number: SU997017A1
Application number: SU813235609A
Authority: SU
Inventors: Игорь Владимирович Волков; Станислав Иванович Закревский; Валерий Васильевич Пшеничный; Евгений Петрович Остапченко; Борис Михайлович Верлинский; Александр Васильевич Титаров
Original assignee: Институт Электродинамики Ан Усср
Priority date: 1981-01-15
Filing date: 1981-01-15
Publication date: 1983-02-15

Description

Изобретение относитс к преобразовательной технике и мржео быть использовано преимущественно в устройствах электропитанн нелинейных нагрузок.The invention relates to converter equipment and may be used primarily in devices for electropower non-linear loads.

Известен, преобразователь источника напр жени в истЬчник с пр моугбль ной внешней вольт-амперной арактеристокой , содержасций ищцуктивно-емкостный блок, подключенный входом к источнику переменного напр жени , а выходом - к пе р1аичнрй обмотке согласующего трансформатЬра, и блок переключени режима работы с источника тока на источник напр ени 1.The converter of the voltage source to the power supply with a external external volt-ampere characteristic is known, contains a search-capacitive unit connected by an input to an alternating voltage source, and an output to a matching winding of the matching transformer, and a unit for switching the operating mode from the current source on the source voltage 1.

Недостатком этого преобразовател вл етс низка надежность работы.The disadvantage of this converter is low reliability of operation.

Наиболее близким к изобретению по технической сущности вл етс преобразователь источника напр жени в источник с пр моугольной внешней : вольт-амперной характеристикой, содержаищй индуктивн6-«мкостный преобразукщий блок, подключёншлй входом к и сточни ку переменного н апр жени , а выходом - к первичной обмотке согласующего трансформатора, к вторичной обмотке которого подключены выводы на.грузки, и блок перек.пючени режима работы, выпол енный в видеThe closest to the invention according to the technical essence is a voltage source converter into a source with a rectangular external: current-voltage characteristic, containing an inductive-6 "bridge conversion unit, connected to the input and to the source of the variable on April, and the output to the primary winding of the matching transformer, to the secondary winding of which the terminals for the load are connected, and the switching unit of the operating mode, performed as

вентиального моста, одна диагональ которого соединена с выводами дополнительной обмотки согласующего тран5 сформатора| |23.valve bridge, one diagonal of which is connected to the terminals of the additional winding of the matching transformer of the transformer | | 23.

К недостатком этого преобразовател относ тс дискретное изменение уровн напр жени на нагрузке, получаемое путем переключени отпаек IQ дополнительной обмотки нагрузочного трансформатора, а также необходимость наличи отдельного источника посто внрго напр жени .The disadvantage of this converter is the discrete variation of the voltage level at the load, obtained by switching IQ spikes from the additional winding of the load transformer, as well as the need for a separate source of constant external voltage.

Целью изобретени вл етс упрощение преобразовател и повьшение The aim of the invention is to simplify the converter and reduce

15 плавности регулировани напр жени .15 smoothness of voltage regulation.

Поставленна цель дости,гаетс тем, что в преобразователе втора диагональ вентильного моста подключена к двухполюснику, измен ющему The goal is achieved by the fact that in the converter the second diagonal of the valve bridge is connected to a two-terminal device that changes

20 эквивалентное сопротивление в зави симости от заданного уровн напр жени .20 equivalent resistance depending on a given voltage level.

Причем двухполюсник содержит составной транзистор, эмиттер которот Moreover, the bipolar circuit contains a composite transistor, the emitter of the

25 го подсоединен к-одному из выводов второй диагонали вентильного моста, коллектор через ограничительное сопротивление подсоединен с другому выводу второй диагонали моста, к 25 is connected to-one of the conclusions of the second diagonal of the valve bridge, the collector through the limiting resistance is connected to another terminal of the second diagonal of the bridge, to

Claims

30 to which one output of the Zener diode connected to the second output is connected through the resistance of the feedback to the emitter of the composite transistor, the base of the composite transistor is connected to the moving contact of a voltage divider connected to the terminals of the Zener diode. On the fit. 1 is a block diagram of a converter; in fig. 2 - variant of two-pole operation. Source converter Voltage to a source with a rectangular external volt-ampere characteristic contains an inductive-capacitive converter 1 of the source voltage to a current source with input terminals for connection to an alternating voltage source 2 and output terminals to which the primary winding 3 is connected About transformer 4, to the secondary winding 5 of which a load is connected b. Transformer 4 is equipped with an additional winding 7 ,. which, via valve bridge 8, is connected to a two-terminal network, 9, which changes its equivalent resistance depending on a given voltage level. The difference lies in the fact that the voltage level on the winding T and, consequently, the voltage level on the load 6 is set by a two-terminal circuit by appropriately changing the value of the equivalent load resistance of the gate bridge 8. As a two-terminal 9, an adjustable voltage inverter can be used Allowing the terminal to recover the electromagnetic energy of the converter 1 through the additional winding 7 to the primary source of voltage 2 and ensuring the stabilization of the voltage level at its terminals. For these purposes, an adjustable voltage regulator can be used, connected to a separate source of constant voltage. But in those cases where there is no constant voltage source, and installing an inverter for energy recovery is impractical because of the complexity of the circuit, a device is proposed, the circuit of which is shown in FIG.

2. The two-port device is designed as a composite transistor 10, the emitter 11 of which is connected to one of the LUs of the gate bridge 8, shunted by a capacitor 12 and connected to the auxiliary winding 7 of the transformer 4, a. the collector 13 is connected via a limiting resistance to another output of bridge 8, to which the zener diode 14 is also connected by one output, the second output of which is connected to the emitter 11 of the composite transistor through the feedback resistance 15, and the composite transistor 16 is connected to the movable contact 17, connected in parallel to the terminals of the Zener diode. The voltage level on the winding is stabilized as follows. . Changes in the magnitude of the load 6 cause changes in the voltage level on the winding 7 and, accordingly, on the voltage divider connected to the output of the gate bridge 8. Since the voltage value at the junction collector-base of the composite transistor is kept constant by the zener diode, the voltage changes on the feedback resistance 15 connected in parallel with the base-emitter junction of the first transistor, which causes a corresponding change in the resistance value, the collector-emitter junction of the composite transistor. Thus, for example, as the voltage at the output of the bridge 8 increases, the voltage drop across the resistance of the coupling 15 increases, the composite transistor 10 opens, the resistance of its transition to the emitter collector decreases, which results. to a decrease in the voltage value on it, and, consequently, at the output of the bridge 8. The level of stable voltage at the emitter-collector junction of the compound transistor is established by a variable resistance in the voltage divider circuit. The use of the present invention allows a separate source of constant voltage to be abandoned, and using an adjustable stabilizer, which is characterized by simplicity of the circuit design and tuning, smoothly adjusts the voltage level on the load. Claim 1. Inverter voltage source to a source with a rectangular external volt-ampere characteristic containing an inductive-capacitive transforming unit connected by an input to an alternating voltage source, and the output to the primary winding of a matching transformer, to the secondary winding of which are connected the load terminals and a mode switching unit, made in the form of a valve bridge, one diagonal of which is connected to the terminals of the additional winding of the matching transformer, which is yuschi dc in that, in order to simplify and increase the smoothness converter voltage control, a second dia: gonal rectifier bridge is connected to two-terminal network.