SU468368A1 - Thyristor magnetic pulse modulator - Google Patents

Description

one

The invention relates to radar technology and can be used on radar transmitting devices for accurately measuring target coordinates for generating powerful modulating pulses.

Known thyristor-magnetic pulse modulator containing the source of the pit -. neither, the source of the magnetizing current, made on the bridge terminals, the thyristor connected to the power source through the input choke, as well as through a nonlinear choke and storage capacitor to the primary winding of the step-up transformer, the secondary winding of which is connected to the load through the switching choke, and the secondary winding a step-up transformer is shunted by a capacitor. .

The aim of the invention is to increase the reliability of the modulator while reducing the stability of the power sources and the biasing current.

For this purpose, the bridge drives of the power sources and the biasing current are connected to the same phases of the power supply

networks, and adjacent brachyostovy; x rectifiers included variable resistors.

FIG. Figure 1 shows a circuit diagram of a thyristor-magnetic pulse modulator.

i Thyristor-magnetic pulse modulator contains a power source, made on transformer 1 and rectifier 2, source of magnetizing current, made on transformer 3 and high voltage 4,; thyristor 5, input choke 6, nonlinear choke 7 and storage capacitor 8, boost transformer 9, switch; A common choke 10, a capacitor 11, a shunt secondary winding of a step-up transformer 9, a capacitor 12 providing the required level of ripple current, variable resistors 13-17 and load 18. The bridge rectifiers 2 and 4 of the power supply and the bias current are connected to the same phases supply network.

FIG. time diagrams are given, explaining the principle of the occurrence of temporal instabilities due to pulsations on the power supply spun 3 at a constant value of the bias current, where: a is the power supply voltage, b is the bias source constant current: synchronization pulses incoming to the control electrode of the thyristor 5; d - change in voltage on the capacitor 8j; d - change in voltage on the capacitor 11 and the level of switching of the throttle 10; e is the change in the inductive current line in the core of the switching dross) -, l 10; W - voltage pulses imparted to the load resistor. 18. --.- ,, - The thyristor-magnetic pulse-i modulator works as follows: Between the two starting pulses, when the thyristor 5 is locked, there is a slow charge on the capacitor 8 from the power source c (Fig. 2. c) . At the same time, in different repetition periods, the capacitor 8 tends to be charged to a different voltage value. When a thyristor control electrode S is supplied to the trigger pulse, it passes to the wire of the neck and the capacitor 8 is quickly discharged. At the moment of this discharge, a voltage pulse is generated on the secondary winding of the transformer 9, under the influence of which the charge of the capacitor 11 starts. This capacitor, like the capacitor 8, is strapped. Mits also charge to different voltage levels (Fig.2.D). In the case when the bias current is not constant, but pulsed, according to the same law as the voltage of the power source, which is ensured by the identity of the rectifier circuits, connecting them to the same phases / mains and the shoulders of the rectifier and the ismoni magnitude of the bias current in accordance with the change in the magnitude of the power supply. "| Operation causes a change in the position of the pa-. boch points on the magnetization curve. By increasing the level to which the voltage tends on capacitor 11, the operating point shifts down and vice versa. This is equivalent to a change in the switching level of the village drogs 1O. The pulse delay time in Ha- 468 368 J-broach 18 relative to the trigger pulse remains constant in different repetition periods (Fig. 2. g) If the rectifier circuits are made 5 differently (for example, one bridge, and the other with doubling) It is not possible to provide a correlation between the ripple voltage of the power supply and the current of the power source. A similar phenomenon will be observed with; power supply to rectifiers from various sources | ;; G. ° "" "is" "For pulsations you are. “Available voltages. - ™ i «™ in the way, with the correct selection of the“ nature of the pulsations of rectified i voltages and currents, the time is nostaoil. can be compensated for a srae-to-relatively high level of ripple voltage: Likewise, they compensate for;, slow changes in the mains voltage. and compensation is also possible when feeding sources from a three-phase network. gh- Subject of the invention. The thyristor magnetic pulse modulator containing the power supply, the source of the magnetizing current, and the lp / ney on the bridge rectifiers, the thyristor, connected to the ns-gpchnik of the power supply through the input choke, and 1acjo through a non-choke (1 choke). / Ire, to the primary winding of the increasing trans (: 4k) of the mator. The secondary winding of which is black & Г G switches the choke connected to the load, and the secondary winding of noBwajaio nieio trans (} ortator is shunted by a caterer, distinguished by itself, it is a rage, it is a rage, it is a rage, it is a ratus, the cell is shunted by a coil, it is by the switch, it is a ratus, the projectile is bridged, it is by the switch, it is by the switch, it is a ratus, the projectile has been shunted by a switch, it is a ratus, it is by a switch, it is a ratus, it is a cell that is shunted by a trainer, it is by the switch, it is by the switch, it is a ratus, it is by the way, the cell is bridged by a coil, it is by the switch, it is a diversion of the projectile; reliability and modulator at snizhenin stabilshnosti podmagnichivayushego power sources and current, bridge rectifiers and the power sources podmagnichivayu11 e -. tokb of the same name connected to the phases of the mains, and in place adjacent shoulders O rectifiers includes variable resistors.

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