SU630729A1 - Arrangement for control of single-phase thyristorized converter - Google Patents

Description

one

The invention relates to the field of instrumental engineering and it can be used in imu systems, phase and phase control by thyristor converters based on single transition transistors (OPT).

A device is known to impregnate a thyristor, which is based on relaxation generators in the OPT 1.

The disadvantage of this device is the high mosh and poisoning.

From the known devices of impulse control by thyristors with the most blunt of the technical essence of the invention, there is a device for controlling a single-phase electric motor, containing a set of transistors adjustable from OPT, phase-shifted capacitances charged from the source and the voltage of the body (ground displacement), charged from the source and its source (ground voltage) (ground voltage (Zero voltage), charged from the source and its voltage (YoR) Consider an opt of a sno-ohm with anodic detection of thyristors, diodes and a transistor 2.

The disadvantage of this device is the possibility of multiple generations of emulsions during each network period.

These impulses cause the MOHIHOCTH supplementary not part of the OPT in other circuit elements. This is especially undesirable for pulsed transformers,

because it is not easy to increase their yersgren.

In the first instance of the invention, the reduction of the quantity of the hirav.tein by means of a transducer and by the means of the polycritio genera. Ñsov, each iolnernn setn.

This is achieved by the fact that the proposed device for anvravnenn odiofaznym tyrnstornymi converter, containing nntaya transformer, phase-shifting capacitor, regulating nnnronizryuynu; ny transistors, two sg.bn.bn.strona single-junction, i'm not using a shred pattern, i'm using a single-line transistor; the bottom connected between () azoscule, nm capacitor and one-transistor trans.shg, nrnchem blocking and phase-shifting co-ordinators n Ko.i.icCroi of the control n ishronchnru1on1e H) transistors are connected to a common point, traieformato point n windings) and connected to dnodom, n transformer snnhroniziruyuschim two stub 1litronamn, soednnenn total point which is connected to the base of the control transistor.

Claims (1)

Pa figs. 1 but the electrical circuit is shown unraved; on fng. 2. a and b are given diagrams of nair 1 ch and ratios of stpiicTBa h1rav.1epi (a - with multiple generation of generation; b - with single generation). The device contains a power transformer 1, a phase-shifting capacitor 2, a blocking capacitor 3, a control transistor 4, a clock transistor 5 and a single junction transistor 6 with an output resistor 7, zener diodes 8 and 9, a diode 10 and a resistor 11. The control transistor 4 and capacitor 2 form phase shifting device, capacitor 3 and bottom 10 - blocking circuit at the input of the unijunction transistor 6. Depending on the base current of transistor 4, capacitor 2 is charged before the voltage of the breakdown of transistor 6. At the moment of equality (TI - OPT) is provided a control pulse and simultaneously charged capacitor to a value of 3 1/3 L / O. In this case, the pulse duration is determined by the constant time, and the value of Ua by the voltage of the Zener diode 8 and the voltage drop across the resistor 11, i.e. Un Us + Un. Repeated (and repeated) generation does not occur as for the subsequent operation of transistor 6 due to the voltage on the capacitor 3, its threshold increases to the value Uap r Un + Uo. Elements 3 and 11 are selected so that, for example, repeated generation of impulses is eliminated. At the zero point of the synchronization voltage, the tracer 5 is turned off, which short-circuits and discharges capacitor 3 through diode 10. As a result, the circuit returns to its original state with zero initial CONDITIONS on the capacitor 3. In the next half-period of the network, a similar process occurs, the output frequency The number of pulses is 2 / (/ is the mains frequency). Thus, in the proposed device, multiple pulse generation is eliminated in each half-period of the network. Claims An apparatus for controlling a single-phase thyristor converter, comprising a supply transformer, a phase-shifting capacitor, a control and a synchronizing transistor, two zener diodes and a single-junction transistor, characterized in that in order to reduce the power output by eliminating the repeated generation of pulses in each network period, the network is generated in each half-cycle of a network with a single pulse. a blocking capacitor and a diode connected between the phase-shifting capacitor and a single transistor, and the blocking minutes and a phase-shifting capacitor and the collectors of the control and timing transistors connected to a common point, the midpoint of the winding of the supply transformer is connected to the diode, the transistor timing and two hundred bilytroiami, the total point of connection which is connected to the base control trapzistora. Sources of information taken into account in the examination 1. US patent number 3870903, cl. 307-252, 1975. 2, Silicon controlled thyristor gates. Ed. V. A. Labuntsova and A. R. Sviridov. “Energie, 1964, p. 151. Lh cot