SU911691A1 - Pulse modulator - Google Patents

Description

The invention relates to a pulse technique and can be used in devices for generating powerful square pulses.

A pulsed modulator is known that contains a charging device, a discharge switch and a forming line connected to the load, each of the subsequent links of the forming line consisting of a capacitor and a variometer with two coils 11.

A disadvantage of the known pulse modulator lies in its extremely low efficiency due to the dispersion of a significant proportion of the corrective elements.

Also known is a pulse modulator containing a charge unit, a parallel switch connected to the common busbar by a cathode, a capacitor discharge circuit that forms a two-terminal circuit containing two LC circuits, one of which consists of pa second of n-1 series-connected inductors, to the terminals of which the first terminals of the capacitors are connected, the first inductance of the first electric circuit being connected

the first output to the anode of the bit switch, and the second outputs of the capacitors of both LC circuits are combined, with the combined outputs

The first LC circuit is through the load, and the second is directly connected to the common bus 2 ..

.The disadvantage of this pulse

 The modulator also has a relatively low efficiency due to the dissipation of a significant amount of power on the corrective elements and the complexity of the modulator circuit due to the difficulty of performing a capacitor discharge circuit.

The purpose of the invention is to increase the efficiency and modulation of the modulator.

This goal is achieved due to the fact that in a pulse modulator containing a load, a capacitor discharge unit that forms a two-terminal circuit is made on two LC circuits, the first of which consists of a second one of n-1 series-connected inductors, to the terminals of which the first capacitors are connected, except for the first output of the inductance of the first HC circuit, which through parallel connected charging unit

and the bit switch is connected to the common bus, the second terminals of the second bc-circuit capacitors are connected via a load to the common bus, the second terminals of the first cs-capacitors are connected respectively to the first terminals of the second bc-capacitors, and the first terminals of the last capacitors of both LC-circuits and the second terminals of the capacitors of the second LC circuit are connected through the corresponding inputs of the capacitor discharge unit to the common bus.

The drawing shows a functional diagram of a pulse modulator.

The pulse modulator contains a parallel-connected charge switch 1, a discharge switch 2 and a circuit consisting of a forming two-pole 3 and a load 4.

Formations a two-terminal 3 contains two LC circuits 5 and b, each of which consists of series-connected inductors, respectively 7-1,, ... and, ..., whose conclusions (except one of the conclusions of the first inductance 7 1 the first UCC-cpi 5) are connected to the first terminals of the respective capacitors, namely to the terminals of the inductors of the first LC circuit 5, ..., the first terminals of the capacitors,, ..., of the first LC circuit 5 are connected, to: the terminals of the inductors, , ..., the second is-circuit b g the first terminals of the capacitors,, ..., of this LC-circuit. One of the terminals of the inductor is connected to the anode of the switch 2, the second terminals of the capacitors are 10 1,, “. , the second LC circuit b is connected to the load 4. The second terminals of the capacitors ,, i .., the first LC circuit 5 are connected to inductors ,, ..., the second LC circuit b To two series-connected capacitors, for example,,, connected block 11 bit capacitors.

Pulse modulator works as follows.

During the pause between the pulses from the charging unit 1, the capacitors are charged, ,,, ..., 10 1 ,, ..., LC circuits 5 and b of the forming two-port circuit 3. After the operation of the discharge switch 2, the said capacitors are discharged The inductance coil,, ... ,, ,, ,, ..., as well as the discharge switch 2, is formed on the load 4 by the output pulse of the modulator.

Since the current in the inductors, ..., is significantly (more than 10 times) less than

coils inductance ,, ...,,, and Their good quality is high enough, the losses in them are fractions of a percent of the power dissipated in the load, i.e. virtually no effect on modulator efficiency.

If it is necessary to access a room, cabinet or unit where high-voltage capacitors are installed, these capacitors are pre-discharged using a block 11 discharge of capacitors.

When the inductance of the coils ,, ... ,, changes, the transient resistance of the forming two-terminal 3 changes, and, consequently, the form of the voltage on the load is regulated. It is known that the sensitivity function of the output voltage of a linear modulator to change and goes to it () is inversely proportional to the square of the magnitude of this inductance

 (R). and (p) R / Eb, where and- (p) is the Lapaslas-converted voltage across

variable inductance;

R is the load resistance; E - charge voltage of artificial capacitors

lines.

Thus, choose, ningsh. inductance coils ,, ..., 8 p-1, can be obtained enough. fine adjustment of the tip of the pulse.

Since the ' pulse modulator corrects the tip of the pulse, it can be done using elements whose losses are negligible, the efficiency in comparison with the known device is in most cases 5-10%. In this case, as shown, the experimental test shows that the correction efficiency in a pulse modulator in a number of cases is higher than in the known device.

It should be noted that the efficiency increase of high-power pulse modulators by 10%, for example, when upgrading radio 50. technical equipment provides significant savings due to energy savings.

A pulse modulator favorably distinguishes the comparative simplicity of a device for discharging capacitors, in particular, a mechanical interlocking disconnector (RMB), which in a number of cases has considerable dimensions and is located in a separate cabinet or

Claims (2)

60 outside cabinets on a special isolator. For example, with a sixteen-arm artificial line with series-connected capacitors in each link, the number of high-voltage knives in the RMB in the proposed pulse modulator is 4 times lower than the known ones; from 20 to 5. Correspondingly, it reduces the number of contacts in the circuit breakers connected to the doors in the enclosures or cabinets where the capacitors of the artificial lines are located. Claims of the invention A pulse modulator containing a load, a block of discharge of condensators and a forming two-terminal circuit, made on two circuits, the first of which consists of n, and the second of n-1 series-connected inductors, the terminals of which The capacitors are connected by terminals, except for the first output of the inductor of the first LC-pi, which is connected to the common bus through a parallel-connected charging unit and a discharge switch, the second terminals of the capacitors of the second UC circuit are connected through a common load The second bus, characterized in that, in order to increase efficiency and simplify the modulator, the second terminals of the first LC circuit capacitors are connected respectively to the first terminals of the second RF capacitors 1c circuit, and the first terminals of the last capacitors of both LC circuits and the second terminals of the second capacitors Lc -Circuits are connected through the corresponding inputs of the capacitor discharge unit to the common bus. Sources of information taken into account in the examination. 1. Author's certificate of the USSR 575760, cl. H - 03 K 3/53, 1977. 2. USSR author's certificate number 327579, cl. H 03 K 3/53, 1972 (prototype). one four 7- / 7- / 7 7- / 9-1 Sz 9n-1 9-p S-f Snl he S-2  YU