SU746911A1 - Linear modulator with controlled duration pulses - Google Patents

Description

(54) LINEAR MODULATOR WITH PULSE OF ADJUSTABLE LENGTH

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The invention relates to the field of powerful Pulse technology and can be used to create X-ray power supply systems, radar pulse modulators, and charged-charge-modulator accelerator modulators.

A linear modulator is known that generates pulses of adjustable duration si due to the fact that a part of the artificial one is discharged to the ballast resistor 1.

The disadvantage of this device is low efficiency when generating impulses with a duration reduced in relation to the maximum possible.

It is also known a device containing a power source connected to a synthetic line, in the cells of which, in series with inductors, damping valves are connected, and in the last cell, a controlled valve (thyristor) is connected, through which the line output is connected to the load, and The valve is connected to the control unit. The control unit is connected to the output of the synchronizer 2.

The disadvantage of such a device is low efficiency in the generation of pulses with a duration shorter than the duration for which the artificial line is designed.

The purpose of the invention is to increase economic efficiency when generating pulses with a duration shorter than the length of the artificial line.

This is achieved in that the proposed linear modulator containing a power source connected to the input of an artificial line, whose cells are made on inductor coils and capacitors and connected to each other through valves, to the last cell is connected to a controlled valve to the control unit

15, a start-up unit, an isolating transformer, a synchronizer, a pulse transformer, and in each cell of an artificial lnnn valve are made controllable, and its control electrode through an isolating

20, a transformer is connected to a start-up unit, the input of which is connected to the first output of the synchronizer, the second output of which is connected to the control unit, the output of the unit is ..., .... -.... -.-.- -. 74 is connected to a floating input of a controlled valve, the load is connected to the output of an artificial line through a pulse transformer and a controlled valve. The drawing shows a linear modulator circuit with repulsive duration pulses. The module contains a power supply 1, connected to an artificial line 2, a control valve, for example, a thyristor 3, and a pulse transformer 4, through which to the output of a sub-secondary load 5, synchronizer 6, the first input of which is connected to the start-up unit 7, the output of which is to the primary winding of the isolation transformer 8. Artificial LIVII cells are made inductance coils 9 and condecatopax 10, and coil 9 through ventilation Or, for example, the I-thyristors, the transition (control electrode-cathode) of which is connected to the corresponding secondary winding of the transformer 8, cdejDtHHeftb is consecutively, the output of block 12, connected to the control electrode tiqjHCTOpa 3, the second output of the synchronizer, is connected to a side of the synchronizer; Module 1 $ op works as follows. The first sync pulse from the first output of the synchrmizer 6 will be switched to block 7, which will generate a 25 minute trigger for switching on 11G thyristors. 10 artificial shsh 2 from the source 1 power. At the end of the charging process, the capacitor falls into a drop on the thyristors and becomes disconnected), and they are turned off, and the line is still in the charged state. Then, the second synchronization pulse enters the input of the block 7 simultaneously from the second synchronizer output b of the sync pulse and enters the block 12 - The block 12 generates for the open gatekeeper 3: Block 7 1, this produces a control trigger for triggering the thyristors 11, equal to the duration of half of the battery is: load 5. Through the transformer 8 this nmn is present on the ghosting electrodes of all the thyritors of line 2. When starting thyristors 11 and thyristor 3 from the end of the line connected to the load 5, start and the incident electric wave of the kotor propagates through the open thyristors 11 towards the opposite end of the line. If the duration of the excitation pulse of the thyristors 11 is chosen to be shorter than the travel time of the wave on line 2 in one direction, then after a time interval equal to the duration of the control pulse, the thyristors that the Falling wave does not reach before 11C will turn out to be closed. Those of them that by the end of the exciting. the pulse has already started to pass the current of the discharge of the line cells, they will remain in the right mode until the end of the discharge. The incident wave, approaching the closed thyristor, will reflect from it as from the open end of the line. As a result of these wave processes, the line is discharged to the load 5 with a duration twice as long as the pulse per square) of the elec- trodes of elec- trons 11. The maximum duration of the pulses produced by a modulator is equal to all i-kam in one direction. By varying the duration of the pulse of block 7, any duration of the working pulse can be obtained with discreteness depending on the number of thyristors 11. If necessary, the pulse duration can be from pulse to pulse in accordance with a given program. At the same time, electric charge is maintained in a certain part of the artificial line. The energy of this charge is used in the next discharge cycle. Formula of the invention Linear modulator with pulses of adjustable duration, containing a power source connected to the input of an artificial line, the cells of which are made on inductors and capacitors and connected to each other through valves, to the last cell is connected to a controlled vein, whose corner input is connected to block uflavleni, from; distinguished by the fact that, with the aim of noSbiiiuemm profitability at general; pulses with a duration of less than line art, a block, a separating transformer, a synchronizer, a pulse transformer and a valve in each cell of an artificial line are made to be controlled in the jfero, and its control electrode is connected to a starting unit through an isolating transformer, the input to which is connected to the first output synchronizer, the second output of which is connected to the control unit, the output of the ugflavley unit is connected to the control input of the controlled valve, the load is connected to the output of the artificial lines through an immersible transformer and controlled valve. Sources of information taken into account in the examination 1. Auslender V. L., Il'in O. G., Shenderovich A. M. PTE, No. 3, 1962, p. 81. 2. USSR author's certificate No. 400980, cl. H 03 to 3/335, published. 04/01/74.

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Claims (1)

Claim A linear modulator with pulses of adjustable duration, containing a power source connected to the input of an artificial line, the cells of which are made on inductors and capacitors and are interconnected via valves, a controlled valve is connected to the last cell, the control input of which is connected to the control unit, th and th with the fact that, in order to increase profitability: when generating it; pulses with a duration shorter than the length of the artificial line, into which a trigger unit, an isolation transformer, a synchronizer, a pulse transformer are introduced, and in each cell of the artificial line the valve is made controllable, and its control electrode is connected through a separation transformer to a trigger unit, the input of which is connected to the first output of the synchronizer the second output of which is connected to the control unit, the output of the control unit is connected to the control input of the controlled valve, the load is connected to the output of the claim stvennoj line via a pulse transformer and a controlled valve.