SU1206919A1 - Control device for transistor converter - Google Patents

Description

one

The invention relates to electrical engineering and can be used in devices for converting a constant voltage of one magnitude to a stabilized constant voltage of another magnitude.

The aim of the invention is to increase accuracy and reliability.

The drawing shows a diagram of the device.

The device contains a master oscillator 1, a single vibrator 2 with direct and inverse outputs, start inputs A and block S, a trigger with counting input 3, elements 4 and 5 coincidence, a two-position relay 6. The converter contains power amplifiers at transistors 7 and 8, a transformer 9, a rectifier on diodes 10 and 11 and a direct current filter on throttle 12 and capacitor 13. A single-oscillator can be performed. For example, on a microcircuit 14 with time - ascending condenser 15, and a two-position relay can be performed, for example, operational amplifier 16 and rezi tori 17-20.

The operation of the device is as follows.

With the power switches of amplifiers 7 and 8 closed, the voltage on the filter capacitor drops and reaches the response threshold of the on-off relay 6, as a result of which a level 1 is set at the output, which enters the lock input of the one-shot 2 and enables its pan bot. The first impulse of the master oscillator 1 triggers a one-shot 2. A pulse from the output of a single-emitter passes to the output of that of the elements 4 and 5 of coincidence, the first input of which pic tacks level 1 from the output of the trigger 3. After the control pulse ends

Editor N. Pushnenkov Order 8731/57

Compiled by A. Pridatkov

Tehred T. Tulik Proofreader A. Zimokosov

Size 632

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VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PSh1 Patent ,, Uzhgorod, st. Project, 4

069192

the inverse one-shot output will switch the counting trigger 3 to another. the state in which the open match element closes and the closed element opens, therefore

the next control pulse generated by the one-shot 2 will hit the output of another coincidence element. As a result, the amplifier keys

10 7 and 8 power alternately open, the voltage across the filter capacitor 13 rises and at some point of time reaches the upper threshold of the two-position actuation

15 relay 6, which returns to its initial state and removes a high level of voltage from the one-shot 2 blocking input. After the impulse acting at that moment ends

20 control, the counting trigger 3 is switched and gives permission for the operation of another match element. Thus, a symmetrical operation of the power transformer 9 is ensured.

25, The technical advantage of the proposed device in comparison with the known one is an increase in the accuracy of the transistor converter, i.e. the locking of the inverter's control pulses is performed for each clock cycle of the master oscillator, and not for one of them, which leads to a decrease in the converter response time to an abrupt current change

JJ load or input voltage and reduce emissions and dips of the output voltage, and increases the reliability of the converter, since, by setting the duration of the control pulse

4Q is less than the repetition period of the pulses of the master oscillator, it is possible to obtain the necessary pause between the control pulses and thereby eliminate the through currents through the power amplifiers.

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Claims (1)

DEVICE FOR CONTROLLING A TRANSISTOR CONVERTER, containing a master oscillator, a two-position relay, the input of which is designed to connect to the output The scheme of the inputs of the converter, with the fact that, of accuracy and reliability of the converter, a trigger with a counting input, the direct and inverse outputs of which are connected to the first inputs of two coincidence elements, the outputs of which are designed to connect to controllers differently in order to increase the accuracy, it is equipped with a single-shot with direct and inverse outputs, a start input and a blocking input, with the single-shot start input connected to the output of the master oscillator, the blocking input to the on-off relay output, and the direct and inverse single-shot outputs By connecting respectively to the second input of the coincidence and the estimated input trigger. B5 □ d ζ ©