SU499644A1 - Device for controlling an autonomous thyristor inverter - Google Patents

Description

control applied to the common dynistor junction for drivers 1, 2 and phase changes of phase-shifting pulses for drivers 3, 4. Transformer 17 generates control pulses for discharge thyristor 16, which together with transformer 18 forms impulses for controlling thyristors.

The device works in the following way.

A first pulse is formed by the button 6, which opens the charge thyristor 9 of the reference pulse generator 2. The charge thyristor charges the capacitance 10 through the switching throttle 8 and closes it.

The control voltage is applied to the load resistor 15. The maximum control voltage must be less than the switching voltage of the dynistor 14. At the time when the voltage across the capacitor 11 is reached, at which the potential difference between the diode and the cathode of the dynistor 13 is equal to f iipoo. the latter is punched and the voltage of the capacitor 11 is applied to the resistor 15. The dynistor 14 pierces the capacitor 11, discharging through the primary winding of the transformer 17, forms a pulse in its secondary winding, which opens the discharge thyristor 16. The thyristor 16 discharges the capacitor 10 through the primary the winding of the transformer 18 of the driver of the reference pulses 2. A pulse of the secondary winding of the transformer 18 of the generator 2 starts the driver of the reference pulses 1 and the driver of the phase-shifting pulses 3.

Since the charge time of the capacitor 11 of the driver of the phase-shifting pulses 3 is less than that of the driver 1. Therefore, a pulse appears at the output of the driver 3, and then at the output of the driver 1. The output pulse of the driver 1 starts the drivers 2 and 4. Charging time constant Yes, the capacitor 11 of the former 4 is smaller than the former 2. Therefore, the first pulse appears at the output of the former 4, and then at the output of the former 2. Then the process repeats.

For a linear relationship between the frequency change in the formers of the reference pulses 1, 2 and the phases in the formers of the phase-shifting pulses 3, 4, the initial portion of the charge of the capacitor 11 is used.

An increase in the control voltage increases the voltage on the capacitor 11, at which the dynistor 13 is switched on, since the difference between the final voltage on the capacitor 11 and the control voltage remains constant and equal to the switching voltage of the dynistor 13. Reduction of the control voltage accordingly reduces the final voltage in capacitor 11.

Thus, when the control voltage decreases, the frequency of the reference pulses

increases, and the phase of the phase-shifting pulses decreases relative to the reference pulses, and as the control voltage increases, the frequency of the reference pulses decreases, and the phase of the phase-shifting pulses

increases relative to the reference pulses in proportion to the control voltage.

Claims (1)

Invention Formula A device for controlling an autonomous iaiator on thyristors, containing a parametric stabilizer, a source of control of the frequency of the reference pulses, a source controlling the phase of the phase-shifting pulses, the drivers of the reference and the drivers of the phase-shifting pulses, made on the basis of switching reactors, charging capacitors, load resistors, dynistors, charge and discharge thyristors and pulse transformers, the secondary windings of which are connected to the corresponding inputs of other formers, differing from that, in order to simplify, common the points of connection of the dynistor and the load resistor of each driver for the reference pulses are connected to the source of the voltage of the reference pulse frequency via dividing diodes, and the common points The connections of the dynistors and the load resistor of each phase-shifting pulse shaper are connected to the source of phase control of the phase-shifting pulses via separation diodes.