SU764071A1

SU764071A1 - Inverter

Info

Publication number: SU764071A1
Application number: SU721745644A
Authority: SU
Inventors: Борис Лазаревич Уан-Золи
Original assignee: Предприятие П/Я М-5374
Priority date: 1972-02-07
Filing date: 1972-02-07
Publication date: 1980-09-15

Description

1one

Изобретение относитс к устрой- . ствам преобразовательной техники и может быть использовано в качестве вторичного источника питани промышленных установок и транспортных средств.The invention relates to a device. conversion equipment and can be used as a secondary source of power for industrial plants and vehicles.

Известны схемы статических преобразователей , в которых силова часть выполнена в виде магнитнотранзисторных усилителей с токовой поло5кительной обратной св зью 1 и 2.The schemes of static converters are known, in which the power part is made in the form of magnetic transistor amplifiers with a current-feedback feedback 1 and 2.

К недостаткам таких устройств следует отнести большую мощность управлени , чтЪ увеличивает вес и габариты схемы управлени и всего устройства.The disadvantages of such devices include high power control, which increases the weight and size of the control circuit and the entire device.

Наиболее близким к изобретению вл етс инвертор, содержащий задак ций генератор, магнитотранзисторный усилитель, первична обмотка трансформатора которого через транзисторные ключи подключена к входным выводам а цепи управлени этих ключей св заны.с вторичными обмотками трансформатора ynpaBJiieни 1} .Closest to the invention is an inverter containing a generator, a magneto-transistor amplifier, the transformer primary winding through transistor switches connected to the input terminals and the control circuits of these switches are connected to the secondary windings of the transformer ynpaBJiieni 1}.

Однако это устройство также обладает низкими массогабаритными показател ми .However, this device also has low weight and dimensions.

I...-:.-.... . . . .I ...-:.-..... . . .

Цель изобретени - улучшение Мйё согабаритных показателей.The purpose of the invention is to improve Myyo overall indicators.

Указанна цель достигаетс тем, что в инверторе, содержащем задающий генератор и магнитотранзисторный усилитель, первична обмотка трансформатора которого через транзисторные ключи подключена ко входным выводам, а цепи управлени этихThis goal is achieved by the fact that in the inverter, which contains a master oscillator and a magnetotransistor amplifier, the transformer primary winding through transistor switches is connected to the input pins, and the control circuits of these

to ключей св заны со вторичными обмотками трансформатора управлени , последовательно с первичной обмоткой трансформатора усилител включена дополнительно введенна обмотка трансформатора управлени .The keys are connected to the secondary windings of the control transformer, in addition to the primary winding of the amplifier transformer, the additional entered winding of the control transformer is switched on.

Кроме того, к Общей точке последовательно соединенных указанных обмоток подключены возвратные диоды .In addition, return diodes are connected to the Common point of these windings connected in series.

20 На фиг. 1 представлена схема инвертора; на фиг. 2 - эпюры напр .жени и токов элементов.20 In FIG. 1 shows an inverter circuit; in fig. 2 - diagrams for example, and element currents.

Схема инвертора содержит силовые транзисторы 1-4, трансформаторThe inverter circuit contains power transistors 1-4, a transformer

25 5 управлени , обмотки б, 7 которого через транзисторы 8, 9 подключены к источнику питани пр мо или через стабилизатор напр жени 10 1рбозна,чен пунктиром) , базовые25 5 controls, windings b, 7 of which are connected through a transistor 8, 9 to a power source directly or through a voltage regulator (10 1, known as a dotted line), basic

Claims

30 windings 11-14 of transformer 5 are connected through ballast base resistors 15-18 to the input circuits of transistors 1-4. Power transistors for inverse currents are shunted by return diodes 19-22. The diagonal of the power amplifier includes the primary winding 23 of the output transformer 24, the secondary winding 25 of which is connected to the load 26. The additional winding 27 of the control transformer 5 is connected to the load circuit. The inverter works as follows. Let the transistors 1 and 4 from the windings 11, 14 PU be open. The inverse load current 26 (section a b of Fig. 2 flows through the return diodes 19, 22 (the reverse current does not flow through the winding 27 of the control transformer 5) as indicated. ka 27 is connected between power transistors and return diodes.) The control current of transistors 1, 4 comes from the power source (fiy). After the transfer of the load current through zero (point b of fig. 2) through the additional winding 27, the transformer 5 of control starts leaking load current that leads to a decrease in the pit current nor PU (1pu PU)) as in the proposed circuit, the transformer 5 is controlled from the voltage source and from the current source (by winding 27). at constant load of the control transformer 5. By changing the transform ratio of the winding 27 to the basic windings 11-14, it is easy to reach such a nos position so that when the load current reaches the amplitude value, the control device power supply current decreases to 0 or even changes its sign 1 | . Thus, in the proposed circuit, the average current is sharply reduced, which makes it possible to reduce the number of transistors 8, 9. The magneto-transistor amplifier can be made according to the circuit with a midpoint. Claim 1. An inverter comprising a master oscillator and a magcito transistor amplifier, the transformer primary winding through transistor switches connected to the input terminals, and the control circuits of these switches are connected to the secondary windings of the control transformer, improvement in weight and size indicators, in addition to the primary winding of the transformer of the amplifier, the additionally introduced winding of the control transformer is switched on. 2. The inverter, as defined in claim 1, is based on the fact that the return point is connected to the common point of the series-connected said windings. Sources of information taken into account during the examination 1. USSR author's certificate No. 1S3648, cl. H 02 M 7/48, 1964.

2. Moin B.C. and others. Stabilized transistor converters .M. Energy, 1972, p.314, fig.9-7.

Fig. &