SU898598A1 - Pulse generator - Google Patents

Description

I

The invention relates to a pulsed electronic technology and can be used in control systems for valve converters.

A known pulse generator comprising series-connected cells, each of which consists of parallel-connected storage capacitor and series-connected windings of the output transformer and thyristor, connected to a power source, the control electrodes of the thyristors are connected each through its own transformer to the emitter circuit or collector of the control transistor.

However, this generator is complicated, since a transformer is included in the trigger circuit of each thyristor.

A pulse generator is known that contains series-connected cells, each of which consists of parallel-connected storage capacitor and series-connected windings of the output transformer and thyristor, connected via a charging element to the power source 23.

The scheme of this generator is complex, since it assumes the presence of a conversion device.

The purpose of the invention is to simplify the generator.

The goal is achieved by the fact that in the generator of impulses containing series / connected cells, each of which consists of parallel, connected storage capacitor and series connected

15 windings of the output transformer and thyristor, connected between the power supply source, with one of the cells shunted by a resistor, the input transformer controlling

Claims (2)

The thyristor electrode of each cell is connected through an appropriately connected thyristor of the optocoupler and the secondary winding of the input transformer of the matrix connected to the cathode of the same thyristor, parallel to each storage capacitor a circuit is connected from the series-connected resistor, zener diode and optical diode of the optocoupler. The drawing shows the principal scheme of the pulse generator, the pulse generator contains lines 1 and 2, output transformers 3 and 4, storage capacitors 5 and 6, resistor 7, optocouplers 8 and 9, input transformer 10, resistors 11 and 12, zener diodes 13 and 14. The pulse generator works as follows. When the supply voltage is turned on, the capacitor 6 is charged to a voltage close to the voltage of the power source, and the voltage on the capacitor 5 is close to zero due to the voltage of the shunt resistor 7. The time constant of the capacitor-5 rezistor 7 is chosen much longer than the period input pulses. Then the zener diode 14, which has a stabilization voltage slightly lower than the voltage to which the capacitor 6 is charged, breaks through and lights up the diode of the optocoupler 9, preparing the thyristor of this optocoupler for switching on. An input pulse, passed through the switched on thyristor of the optocoupler 9 to the control electrode of the thyristor 2, turns it on. At the same time, due to the absence of VIA on the capacitor 5 of the voltage required for the breakdown of the Zener diode 13, the optical diode 8 does not light up, which basically excludes the possibility of switching on the thyristor 1 and, as a result, the possibility of the generator to fail. When the thyristor 2 is turned on, the capacitor 6 is discharged and the capacitor 5 is charged. When the voltage on the capacitor 5 reaches the voltage across the Zener diode 13, the emitting diode of the optocoupler 8 and the next input pulse illuminates through the control electrode thyristor I, turns it on. Resistors 11 and 12 limit the currents through the emitting diodes of the optocouplers 8 and 9. Then the process is repeated. Consequently, the input pulses are recalculated into a push-pull sequence of output pulses, the parameters of which are determined by the inductance of transformers 3 and 4, the capacitance of the capacitors 5 and 6, and the voltage of the power supply. The output pulses are removed from the secondary windings of transformers 3 and 4. Thus, the circuit of this pulse generator is simpler, since it does not need a conversion device and does not contain several input transformers at the input. Claims An impulse generator comprising series-connected cells, each of which consists of parallel-connected storage capacitor and series-connected windings of the output transformer and thyristor, connected between the power supply buses, one of the cells being shunted with a resistor, an input transformer, which is in order to simplify the generator, the control electrode of the thyristor of each cell through the corresponding series-connected thyristor of the optocoupler and the second The rich winding of the input transformer is connected to the cathode of the same thyristor, parallel to each storage capacitor a circuit is connected consisting of a series-connected resistor, a Zener diode, and an emitting diode of an optocoupler. Sources of information taken into account during the examination 1. USSR author's certificate No. 566329, cl. H 03 K 3/53, 1976. 2. Vishnevetsky A.I. and others. Power ion and subconductor devices. M., Higher School, 1975, p. 252 (prototype). -f