SU455334A1 - Stabilized converter - Google Patents

Description

one

This invention relates to the field of electrical engineering, in part to stabilized converters.

A converter-stabilizer of transistors, connected to an circuit with an optical collector, containing a switch and an output transformer, two oppositely connected between databases and a switching transducer, a control transistor, connected to the point of the primary winding of the output transformer, to the collector to the point of the connection point, to the connection point, to the point of the connection point, to the connection point. included diodes, the base to the feedback circuit with the load.

A disadvantage of the known device is the presence of galvanic connection between the supply and output voltages of the converter.

The aim of the invention is to provide a wide variety of devices, i.e. the creation of a stabilizer transformer which lacks galvanic coupling of the primary circuit to the load.

To achieve this goal, a feedback input is connected between the midpoint of the primary winding of the output transformer and the common meeting point of the included diodes whose cathodes are connected to the bases of the transistors of the converter.

The diagram of the proposed converter-stabilizer is shown in the drawing, where 1, 2-

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switching transistors, including a two-cycle oscillator with a common collector; 3. 4 - meeting the diodes connected between the bases of the switching transistors; 5 - Iranian transistor; 6 - variable) Ezistor; 7-on-Zener diode; 8-ballast resistor; 9 - feedback value transistor; 10 - output transformer; // - Wo - rectifier, filter and, respectively.

The terminals “+ and“ - are supplied with a constant signal. My device is an unstable source, while the average point of the output transducer on the common TOHKOii of the oppositely connected diodes 3 and 4 is the voltage that supplies power for the 10V transistor. A reverse feedback circuit, state n1, is from a series of a resistor 6, a zener diode 7 with a ballast resistor 6, and a transistor 9.

The output of the feedback circuit is connected to the base of the driving tracer 5. connected via diodes 3 and 4 to the bases of switching transistors 1 n 2, and the collector to the middle point of the nervous winding of the output transformer 10.

With an increase in the ipArIa tion of the output of the converter, as well as the voltage of the collector-emitter of the transistor 5

(i.e., the feed voltage of the feedback) tends to increase. This leads to an increase in the base and collector currents of the feedback transistor 9 and, in turn, causes an increase in the base current and the collector current of the control transistor 5.

An increase in the collector current of the Traisistor5 causes an increase in the potential and a decrease in the current without switching their transistors / and 2, as a result of which the gain of the collector – emitter of the traverse capacitors | / and 2 increases, which causes a decrease in the output voltage. When the supply voltage decreases, the reverse occurs. Thus, continuous stabilization of the output voltage occurs.

The variable resistor 6 can smoothly adjust the base current of the transistor 9, thereby n the output voltage of the converter-stabilizer.

In the case of the application of the transistors 5 and 9 of the inverse conductivity, it is necessary to change them to the opposite polarity of the wiring.

Subject invention

A stabilized converter containing transistors as switching elements of a converter, connected according to a common collector circuit, output and switching transformers, a control transistor and a collector connected to the midpoint of the primary winding of the output transformer, an emitter to a common point of counter-connected between transducer bases | diodes, the base of the output is the price of feedback, characterized in that, in order to simplify it, the input of the feedback circuit is connected between the point ervichnoy winding of the output transformer claim generic point of said back connected diodes.