SU1398056A1

SU1398056A1 - Transistor bridge inverter

Info

Publication number: SU1398056A1
Application number: SU864149901A
Authority: SU
Inventors: Георгий Никитович Алехин
Priority date: 1986-11-19
Filing date: 1986-11-19
Publication date: 1988-05-23

Abstract

Изобретение относитс к электротехнике и может быть использовано в устройствах преобразовани энергии. Цель изобретени - повышение КПД в широком диапазоне изменени питающих напр жений. Введение стабилизаторов, выполненных на транзисторах 7-10, и дополнительных транзисторов 5, 6 обеспечивает то, что падение напр жени на переходах база-эмиттер дополнительных транзисторов 5, 6 прикладываетс в запирающем направлении по отношению к базозмиттерным переходам транзисторов, соединенных с управл ющими входами соответствующих стабилизаторов тОка, которые обеспечивают ток отпирани силовых транзисторов.1, 3. 1 з.п. ф-лы, 1 ил.The invention relates to electrical engineering and can be used in power conversion devices. The purpose of the invention is to increase the efficiency in a wide range of supply voltages. The introduction of stabilizers made on transistors 7-10 and additional transistors 5, 6 ensures that the voltage drop at the base-emitter junctions of the additional transistors 5, 6 is applied in the blocking direction relative to the base-junction transitions of the transistors TOK stabilizers, which provide current for unlocking power transistors.1, 3. 1 Cp f-ly, 1 ill.

Description

СО (О 00 ОSO (O 00 O

СПSP

О)ABOUT)

Изобретение относитс к электротехнике и может быть иг юльзовано в системах вторичного электропитани и автоматики дл преобразовани посто нного напр жени в переменное.The invention relates to electrical engineering and can be used in secondary power supply and automation systems to convert a constant voltage to an alternating voltage.

Цель изобретени - повышение КПД в широком диапазоне изменени питающих напр жений.The purpose of the invention is to increase the efficiency in a wide range of supply voltages.

На чертеже показана принципиальна схема предлагаемого мостового ин- йертора.The drawing shows a schematic diagram of the proposed bridge inyertora.

Инвертор содержит силовые транзис- т|оры 1-4, дополнительные транзисторыThe inverter contains power transistors t | oors 1-4, additional transistors

10ten

транзистор 5 протекает ток, определ емый сопротивлением резистора 12. Так как ток, протекающий через резистор 12,имеет очень малую величину, в не-- сколько дес тков раз меньшую номинального выходного тока генератора, то мощность, рассеиваема на элементах неработающего плеча 1, 7, 8, 11 и 12, незначительна. Аналогично работает устройство при подаче входного сигнала на транзистор 4.the transistor 5 is flowing a current determined by the resistance of the resistor 12. Since the current flowing through the resistor 12 has a very small value, several tens of times smaller than the rated output current of the generator, the power dissipated on the elements of the non-working arm 1, 7 , 8, 11 and 12, is negligible. Similarly, the device operates when the input signal to the transistor 4.

При изменении питающего напр жени ток, отпирающий транзисторы 1 и 3,When the supply voltage changes, the current that turns on transistors 1 and 3,

5J и 6 и стабилизаторы тока, выполнен- поддерживаетс посто нным стабилиза- йые на транзисторах 7-10 и резисторах 11-14. Выход инвертора соединен с на- г|рузкой 15.5J and 6 and the current stabilizers are made to be kept constant at stabilizers on transistors 7-10 and resistors 11-14. The output of the inverter is connected to the driver 15.

: Коллекторы первой пары силовых 1|ранзисторов 2 и 4 подключены к базам Е|ТОРОЙ пары силовых транзисторов 1 и 3, которые соединены с одним из выво- ов стабилизаторов 7, 8, 11, 12 и 9, 10, 13, 14 тока и эмиттерами дополни- 1|ельных транзисторов 5 и 6. Коллекто-25 подключена эмиттерами к первому вход20: The collectors of the first pair of power 1 | razistorov 2 and 4 are connected to the bases E | TOROY of a pair of power transistor 1 and 3, which are connected to one of the outputs of the stabilizers 7, 8, 11, 12 and 9, 10, 13, 14 current and additional emitters of additional transistors 5 and 6. Collecto-25 is connected by emitters to the first input20

торами тока, поэтому режимы транзисторов и КПД всего устройства измен ютс мало.current transistors, so the modes of the transistors and the efficiency of the entire device vary little.

Claims

1. Bridge transistor inverter containing two pairs of power transistors, the first pair of which

the transistor 5 is flowing a current determined by the resistance of the resistor 12. Since the current flowing through the resistor 12 has a very small value, several tens of times smaller than the rated output current of the generator, the power dissipated on the elements of the non-working arm 1, 7 , 8, 11 and 12, is negligible. Similarly, the device operates when the input signal to the transistor 4.

When the supply voltage changes, the current that turns on transistors 1 and 3,

maintained at constant stabilization

emitters connected to the first input

current transistors, so the modes of the transistors and the efficiency of the entire device vary little.

Invention Formula

p | s power transistors 1 and 3 are connected to one power supply of the inverter and the second pins of current stabilizers. The emitters of the power transistors 1 and 3 are connected to the bases. The additional ones are connected to the corresponding output transistors 5 and 6 and the load 15. The collectors of the transistors 5 1 6 are connected to the control inputs 4 of the current stabilizers. The emitters of power 1 {razistorov 2 and 4 are connected to the other side of the inverter. I The device operates as follows: IjasoM.

inverter output, two elements of interlocking switching of power transistors and two current control nodes of the base transistors of the second pair connected between the base and the collector of each of these transistors, characterized in that, in order to increase efficiency in a wide range of supply voltages, the node control of the base current of the power transistors of the second pair is made in the form of a controlled current regulator, and the element of interlocking switching of the power transistors is performed in the form of an additional transistor connected by the emitter to the collector of the corresponding power transistor of the first pair, the base to the emitter of the power transistor of the second pair, and the collector to the control input of the current stabilizer,

When the input signal is fed to from the power transistors of the first ijiapH, for example 2, the latter opens. Transistor 3 is opened by a stabilizer current made on elements 9, 10, 13 and 14. In this case, the current flows through the power supply circuit of the transistor 3 - load 15 - base-emitter transition of the transistor 5 - transistor: resistor 2 - power output. The voltage drop across the base-emitter junction of transistor 5 is applied to the base-emitter junction of transistor 1 and keeps it in the locked state I

In this case, the transistor 5 is open and shunts the control input of the current stabilizer. The stabilizer current decreases to almost zero, and through

the inverter's output terminal, the second pair is connected by collectors to the second input terminal of the inverter, and the emitter of each of the transistors of the second pair

d connected to the corresponding output

0

five

inverter output, two elements of interlocking switching power transistors and two current control base power transistors of the second pair connected between the base and the collector of each of these transistors, characterized in that, in order to increase efficiency in a wide range of supply voltages, the control node the base current of the power transistors of the second pair is made in the form of a controlled current regulator, and the element of interlocking switching of the power transistors is made in the form of an additional transistor pa, the emitter connected to the collector of the respective power transistor of the first pair, a base - to the emitter of the power transistor of the second pair, and the collector - to the control input of the current regulator,

2. POP.1 inverter, characterized in that the current stabilizer is made in the form of a control transistor, the collector-base junction of which is shunted by a bias resistor, and the control transistor, the emitter-base junction of which is shunted by a measuring resistor.

313980564

Moreover, the control transistor is a e-controlling and an additional tran- emitter with the base of the controlling resistors, and a collector with a collector transistor, and the base with collectors of power transistors of the second pair.