The high-voltage pulse generator

 

(57) Abstract:

The invention relates to the field of high-voltage pulse technology and can be used to generate a symmetrical bipolar pulse - meander nanosecond duration with high efficiency, in particular as an external source for power inductors beztelesnyh linear induction accelerators. The technical result is an increase in the amplitude generated at the load symmetrical bipolar pulse - meander. The high-voltage pulse generator includes a grounded electrode, forming a short-circuited at the input speed line, made in the form of two series-connected segments of homogeneous lines with distributed parameters the same electrical length. In the internal volume of the second segment of the stepped line posted by high voltage electrode, separating it into two homogeneous line. Between the high voltage and grounded electrodes included source voltage and the spark gap, the spark gap is placed at the junction of the first and second segments staggered lines. To the ends of the grounded electrode connected load. Between the output of the second cut staggered lines and nartok line, the electrical length of which is equal to the electrical length of the segments staggered lines. In the internal volume and the first additional line segments placed additional high-voltage electrodes, dividing each of the segments into two homogeneous line and connected to the high voltage electrode of the second segment of the stepped line. The above correlation to select the wave mate these lines. 1 Il.

The invention relates to the field of high-voltage pulse technology and can be used to generate a symmetrical bipolar pulse - meander nanosecond duration with high efficiency, in particular as an external source for power inductors beztelesnyh linear induction accelerators to a voltage of 105- 107When the pulse duration is meander 10-8- 10-7C.

The known high-voltage pulse generator [1], comprising a grounded electrode, forming a short-circuited at the input segment homogeneous distributed parameter line electrical length T0. In the internal volume of the segment posted a high-voltage electrode, separating it into two homogeneous line. Between the high voltage and grounded electrodes on uchena to the ends of the grounded electrode. The electrical capacity of the line is charged to a voltage V0from an external source. At time t = 0 when the maximum charging voltage generator includes a spark gap, shorting the output end of one of the lines and simultaneously connecting the other output line load. Optimal from the point of view of obtaining the maximum efficiency is when the wave resistance lines are the same and equal to the load resistance. In this case agreed resistive load is formed symmetrical bipolar pulse waveform. In the time interval 0 - 2T0voltage is equal to minus 0.5 V0and in the time interval of 2T0- 4T0the voltage is 0.5 V0. Stored in the generator energy during the pulse is fully transferred to the load.

The disadvantage of this generator is relatively low amplitude of the load voltage equal to the agreed mode only half of the charging voltage, i.e., 0.5 V0.

As the prototype is set to the high-voltage pulse generator [2], containing a grounded electrode, forming a short-circuited at the input speed line, made in the form of two series-connected on the third volume of the second segment of the stepped line posted by high voltage electrode, dividing the interval into two homogeneous line. Between the high voltage and grounded electrodes included source voltage and the spark gap, the spark gap is placed at the junction of the first and second segments staggered lines. Resistive load connected to the ends of the grounded electrode. Optimal from the point of view of obtaining the maximum efficiency is when the wave resistance lines are selected from the formula:

< / BR>
where Z1wave resistance of the first segment of the stepped line;

wave resistance lines with arrester without gap, respectively, in the second leg speed line.

The electric capacity of the two lines near the high voltage electrode with a wave impedance is charged from a source to a voltage V0. At time t = 0 when the maximum charging voltage generator includes the spark gap connecting the short high voltage and grounded electrodes. Coordinated load Zn= Z1/2 is formed symmetrical bipolar pulse waveform. In the time interval T0- 3T0the voltage on the load is equal to-3V0/4, and in the time interval 3T0- 5T0the voltage from="ptx2">

The disadvantage of the prototype is relatively low amplitude of the load voltage equal to the agreed mode only 3V0/4.

The technical result is an increase in the amplitude generated at the load symmetrical bipolar pulse - meander that the use of such generators as external sources for power inductors beztelesnyh linear induction accelerators with the same number of inductors will increase the energy of acceleration, or when the same energy acceleration to use fewer inductors.

The technical result is achieved by the fact that the generator containing a grounded electrode, forming a short-circuited at the input speed line, made in the form of two series-connected segments of homogeneous lines with distributed parameters the same electrical length, the high-voltage electrode placed in the internal volume of the second segment of the stepped line and dividing it into two homogeneous line, the voltage source and a spark gap connected between the high voltage and grounded electrodes, the spark gap is placed at the junction of the first and second segments staggered lines, the load is solely formed by a continuation of the ends of the grounded electrode is stepped line additional line segment, the electrical length of which is equal to the electrical length of the segments staggered lines in the internal volume and the first additional line segments placed additional high-voltage electrodes, dividing each of the segments into two homogeneous line and connected to the high voltage electrode of the second segment staggered lines and wave resistance lines are selected from the ratios of the

< / BR>
where the wave resistance of the line arrester and arrester respectively in the first leg speed line;

wave resistance lines with arrester without gap, respectively, in the second leg speed line;

Z3wave resistance of the line in the additional segment connected to a line with an impedance of Z2;

the wave resistance of the line in the additional segment connected to a line with an impedance of

The additional line segment and placing in its internal volume and the inner volume of the first segment of the stepped line for more high voltage electrodes connected to the high voltage electrode of the second segment of the stepped line, increases the power stock generator, and a certain way podobrannogo pulse - meander and allow for momentum to fully convey the stored energy to the load while increasing the output voltage compared to the charger.

The drawing shows a schematic diagram of the proposed high-voltage pulse generator, where 1 - earthed electrode; 2 - high-voltage electrode; 3, 4 - lines with wave impedances respectively formed by the high voltage electrode 2 in the second leg speed line; 5 - power supply 6 - discharger; 7 - additional line segment; 8, 9 - additional high-voltage electrodes placed in the ground segments staggered lines, respectively; 10, 11 - line wave resistance, respectively, formed an additional high voltage electrode 9 in the first leg speed line; 12, 13 - line wave resistance, respectively, formed an additional high voltage electrode 8 in additional stage of staggered lines; 14 - load.

The generator includes a grounded electrode 1, forming a short-circuited at the input speed line, made in the form of two series-connected segments of homogeneous lines with distributed Parmesan high-voltage electrode 2, separating it into two homogeneous lines 3 and 4 with wave impedances, respectively, Between 2 high voltage and grounded electrodes 1 are enabled, the voltage source 5 and the spark gap 6, and the spark gap is placed at the junction of the first and second segments staggered lines. The output of the second cut speed line additional line segment 7, which is formed by the continuation of the ends of the grounded electrode 1. The electrical length of the additional section is equal to the electrical length of the segments staggered lines T0. In the internal volume and the first additional line segments placed additional high-voltage electrodes 8 and 9, connected to the high voltage electrode 2 of the second segment of the stepped line. Additional high-voltage electrode 9 separates the first segment of the stepped line into two homogeneous lines 10 and 11 with the wave resistance . And extra high voltage electrode 8 is divided additional period of 7 speed line into two homogeneous lines 12 and 13 with the wave impedance of the Load 14 connected to the output of an additional segment 7 to the ends of the grounded electrode of the generator.

The generator works as follows. Under deistvie lines 10, 11, 3, 4, 12 and 13 with wave impedances, respectively. At time t = 0 when the maximum charging voltage, turns on the spark gap 6, and lines 10 and 3 waves spread out discharge - V0. We assume the polarity of the voltage is positive, if the electric field intensity vector in the figure is directed upwards. At time t = T0wave discharge propagating along the line 10 reaches the place of its connection with the line 11. As a result, in line 10 will be reflected wave voltage-V0/2, in line 11 will wave 3V0/2. At the same time wave discharge propagating along the line 3 reaches the place of its connection with the line 12. As a result, in line 3 will be reflected wave voltage and the line 12 will wave At time t = 2T0the following happens. Wave voltage V0/2 and extending respectively in the segments 10 and 3 come from different sides to short the spark gap 6 and is reflected from it without changing the amplitude, but with opposite polarity. Wave 3V0/2 propagating along the line 11 reaches the place of its connection with line 4. As a result, in line 11 will be reflected wave voltage V0/2, and line 4 has completed. the and agreed resistive load 14 receive a voltage pulse in line 12 will be reflected wave - V0and in line 13 will be wave voltage V0. At time t = 3T0the following happens. At the junction of lines 10 and 11 come in two waves of the same voltage amplitude equal to V0/2. As a result of superposition, the total amplitude of the wave reflected in the line 10, is equal to zero. By this time completed the extraction of energy from the line 10. In line 11 will be wave voltage - V0. at the junction of lines 3 and 12 come in two waves voltage: line 3 - wave and line a 12 wave - V0. As a result, in line 3 will be wave voltage and line a 12 - wave at the junction of lines 4 and 13 come in two waves voltage: line 4 - wave 2V0a 13 - wave V0. As a result, in line 4 will be wave voltage V0/2, in line 13 - wave 3V0/2. At time t - 4T0the following happens. Wave voltage propagating along the line 3, comes to short the spark gap 6 and is reflected from it without changing the amplitude, but with opposite polarity. The connection lines 11 and 4 come in two waves voltage: line 11 - wave - V0a 4 - ox is the moment in time ends with a full selection of energy from lines 10 and 11. In line 4 will be wave voltage-3V0/2. To the output of the generator come in two waves voltage: line 12 - wave and line 13 - wave 3V0/2. As a result, the voltage at the load becomes equal to the line 12 will be reflected wave voltage V0/2, in line 13 wave - V0/2. At time t = 5T0the following happens. At the junction of lines 3 and 12 come in two waves voltage: line 3 - wave and line a 12 - wave V0/2. As a result of superposition, the total amplitude of the wave reflected in line 3, is equal to zero. By this time completed the extraction of energy from line 3. In line 12 will be wave voltage at the junction of lines 4 and 13 come in two waves voltage: line 4 - wave - 3V0/2 and line 13 wave-V0/2. As a result of superposition, the total amplitude of the wave reflected in line 4, is equal to zero. By this time completed the extraction of energy from lines 10, 11, 4. In line 13 will be wave voltage - V0. In time to the output of the generator come in two waves: line 12 - wave voltage and line a 13 wave - V0. The voltage at the load 14 becomes zero. The amplitude of the waves reflected in lines 12 and 13, is also zero. By this time completed p

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equal to the amount of energy stored initially in the generator

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The proposed generator as the generator prototype allows in the ideal case, to fully convey the stored energy generator in the matched load when forming it symmetrical bipolar pulse voltage. The voltage amplitude in comparison with the generator prototype increases in times.

The correct method of analysis of wave processes in high-voltage generators on the stepped lines similar to the above, was repeatedly confirmed in the creation of a number of high-current pulsed electron accelerators systems with pulse shaping accelerating voltage on the stepped lines [3 - 5].

The generator can be performed in embodiments using stripline, coaxial and radial lines with distributed parameters.

Sources of information taken into account:

1. Pavlovsky, A. I. and other Bezglasnyi linear induction accelerators. M., Atomic energy, I. 37, vol. 3, 1974, S. 228, Fig. 3 (analog).

2. Smith J. Linear induction accelerators accelerating devices based on forming lines with pulse power from with the forming systems based on stepped transmission lines// 9-th International Conference on High-Power Patricle Beams, BEAMS-92, Washington, DC, May 25 - 29, 1992; Springfield, VA, NTIS. 1992. V. 1. PP. 505 - 510.

4. Bossamykin V. S. , V. Gordeev, S., A. I. Pavlovskii et al. STRAUS-2 pulsed electron accelerator // 9thIEEE Internat. Pulsed Power Conf., Albuquerque, NM, June 21 - 23, 1993; Springfield, VA, NTIS. 1993. V. 2. PP. 940 - 912.

5. Bossamykin V. S., V. Gordeev, S., A. I. Pavlovskii et al. Linear induction accelerator LIA-10M // 9thIEEE Internat. Pulsed Power Conf., Albuquerque, NM, June 21 - 23, 1993; Springfield, VA, NTIS. 1993. V. 2. PP. 905 - 907.

The high-voltage pulse generator containing a grounded electrode, forming a short-circuited speed line, made in the form of two series-connected segments of homogeneous lines with distributed parameters the same electrical length T0high-voltage electrode placed in the internal volume of the second segment of the stepped line and dividing it into two homogeneous line, the voltage source and a spark gap connected between the high voltage and grounded electrodes, the spark gap is placed at the junction of the first and second segments staggered lines, the load connected to the ends of the grounded electrode, characterized in that between the output of the second cut speed line and load enabled formed by a continuation of the ends of the grounded electrode is stepped line additional line segment, algo segments placed additional high-voltage electrodes, dividing each of the segments into two homogeneous line and connected to the high voltage electrode of the second segment staggered lines and wave resistance lines are selected from the ratios of the

< / BR>
where the wave resistance of the line arrester and arrester respectively in the first leg speed line;

wave resistance lines with arrester without gap, respectively, in the second leg speed line;

Z3wave resistance of the line in the additional segment connected to a line with an impedance of Z2;

the wave resistance of the line in the additional segment connected to a line with characteristic impedance

 

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