JP2003037982A - Voltage pulse generator - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a high-voltage pulse generator with high energy efficiency by making the output pulse rise fast. In place of a conventional high-voltage pulse generator,
A load-side circuit having a first transformer and a second transformer having a secondary coil connected in series to a load, and a first circuit having a circuit element connected to a pair of first output terminals and storing charge for charging. A pulse shaping circuit, a second pulse shaping circuit having a circuit element connected to the pair of second output terminals and storing a charge for charging, one end of the first output terminal and the second output terminal A drive-side circuit in which a first primary coil of the first transformer and a second primary coil of the second transformer are connected in series between one end of the first transformer and the first primary coil and the second A connection point between the primary coil and the primary coil includes a switch circuit having a switch element that can be short-circuited to the other end of the first output end and the other end of the second output end.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voltage pulse generator used for a laser excitation power source and a particle acceleration pulse generator. In particular, the present invention relates to a voltage pulse generator having a characteristic circuit configuration for generating a pulse.

[0002]

2. Description of the Related Art A high voltage pulse generator for generating a short pulse and high voltage large current is used for generating a charged particle beam and exciting a gas laser. Conventional high voltage pulse generators include a baseline type and a bloom line type. There are a combination of lumped constant elements such as capacitors and inductors and a combination of distributed constant elements such as metal plates and coaxial cables, but the functions are the same.

First, the structure of a baseline type high voltage pulse generator will be described. FIG. 5 is a circuit diagram of a baseline type high voltage pulse generator. The baseline-type high-voltage pulse generator 300 is a device that applies a high-voltage pulse to the load 1, and includes a load-side circuit 310, a drive-side circuit 320, a pulse shaping circuit 330, a switch circuit 340, and a charging circuit 350. Have.

The load side circuit 310 is a circuit for supplying a high voltage current to the load 1 and has a transformer 311. The secondary coil 312 of the transformer 311 is connected to the load 1 in series.

The pulse shaping circuit 330 is a circuit which outputs a pulse while shaping the charged electric charge, and has a circuit element which is connected to the pair of output terminals 333 and 334 and stores the electric charge for charging. The circuit element is formed by connecting the capacitor 331 and the inductor 332 in a ladder shape. The capacitor 331 is arranged in a circuit corresponding to a horizontal bar of the ladder circuit, and the inductor 332 is arranged in a circuit corresponding to a vertical column of the ladder circuit. The ends of the vertical columns of the ladder circuit form a pair of output ends 333,334.

The drive side circuit 320 is a circuit for applying a voltage to the primary coil 313 of the transformer 311, and connects one end 333 of the output end to one end of the primary coil 313.

The switch circuit 340 is a pulse shaping circuit 3
It is a circuit for discharging the electric charge charged in 30 and guiding it to the primary coil 313 of the transformer 311, and has a switch element 341. The switch element can short the other end of the primary coil 313 to the other end 334 of the output end.

The charging circuit 350 is a pulse shaping circuit 330.
And a power supply 351. The power supply 351 is connected in parallel to the other end of the primary coil 313 and the other end 334 of the output end.

Next, the operation of the baseline type high voltage pulse generator will be described. First, the switch circuit 340 is opened. The power supply 351 of the charging circuit 350 has a voltage V
The electric charge for charging is supplied to the pulse shaping circuit 330. The pulse shaping circuit 330 charges the capacitor 331 with electric charges. When the switch circuit is closed, the charges accumulated in the capacitor 331 pass through the switch element 341 and the transformer 31.
1 to the primary coil 313. The voltage applied to the coil is shaped by the pulse shaping circuit 330 and becomes a pulse of voltage V / 2. The pulse has a substantially trapezoidal shape with a gentle shoulder. The voltage is boosted by the transformer and supplied to the load 1. In the load 1, a substantially rectangular pulse having a desired voltage by an electronic gate is supplied to, for example, a high frequency generating electron tube.

Next, the structure of the Bloomline type high voltage pulse generator will be described. FIG. 6 is a circuit diagram of a Bloomline type high voltage pulse generator. The Bloomline type high voltage pulse generator 400 is a device that applies a high voltage pulse to the load 1, and includes a load side circuit 410, a drive side circuit 420, a first pulse shaping circuit 430a, and a second pulse shaping circuit 430b. And switch circuit 440 and charging circuit 4
50 and.

The load side circuit 410 is a circuit for supplying a high voltage current to the load 1 and has a transformer 411. The secondary coil 412 of the transformer 411 is connected to the load 1 in series.

The first pulse shaping circuit 430a is a circuit which outputs a pulse while shaping the charged electric charge, and is a circuit which is connected to the pair of first output terminals 433a and 434a and stores the electric charge for charging. Have elements. The circuit element is formed by connecting the capacitor 431 and the inductor 432 in a ladder shape. The capacitor 431 is arranged in a circuit corresponding to a horizontal bar of the ladder circuit, and the inductor 432 is arranged in a circuit corresponding to a vertical column of the ladder circuit. The ends of the vertical columns of the ladder circuit form a pair of first output ends 433a and 434a.

The second pulse shaping circuit 430b is a circuit which outputs a pulse while shaping the charged electric charge, and accumulates the electric charge for charging which is connected to the pair of first output terminals 433b and 434b. It has a circuit element to do. The circuit element is formed by connecting the capacitor 431 and the inductor 432 in a ladder shape. The capacitor 431 is arranged in a circuit corresponding to a horizontal bar of the ladder circuit, and the inductor 432 is arranged in a circuit corresponding to a vertical column of the ladder circuit. The ends of the vertical columns of the ladder circuit form a pair of second output ends 433b and 434b.

The drive side circuit 420 is a circuit for applying a voltage to the primary coil 413 of the transformer 411. One end 433a of the first output end is connected to one end of the primary coil 413 and the second output end of the transformer 411 is connected. One end 433b is connected to the primary coil 4
Connect to the other end of 13.

The switch circuit 440 is a pulse shaping circuit 4
It is a circuit for discharging the electric charge charged in 30 and guiding it to the primary coil 413 of the transformer 411, and has a switch element 441. The switch element 441 can short-circuit the end of the ladder-shaped circuit forming the first pulse shaping circuit 430a opposite to the first output end.

The charging circuit 450 is a circuit for supplying electric charge for charging to the first pulse shaping circuit 430a and the second pulse shaping circuit 430b, and has a power supply 451. The power supply 451 is a capacitor 431 in a ladder circuit including the first pulse shaping circuit 430a and the second pulse shaping circuit 430b.
Are connected in parallel.

Next, the operation of the Bloomline type high voltage pulse generator will be described. First, the switch circuit 440 is opened. The power supply 451 of the charging circuit 450 has a voltage V
The electric charge for charging is supplied to the first pulse shaping circuit 430a and the second pulse shaping circuit 430b. The first pulse shaping circuit 430a and the second pulse shaping circuit 430b charge the capacitor 431 with electric charges. When the switch circuit is closed, the electric charge accumulated in the capacitor 431 passes through the switch element 441 and the primary coil 41 of the transformer 411.
Flow to 3. The voltage applied to the primary coil 413 is shaped by the pulse shaping circuit 430 and becomes a pulse of the voltage V. The pulse has a substantially trapezoidal shape with a gentle shoulder. The voltage is boosted by the transformer and supplied to the load 1. In the load 1, a substantially rectangular pulse having a desired voltage by an electronic gate is supplied to, for example, a high frequency generating electron tube.

[0018]

When the above-mentioned baseline type high voltage pulse generator 300 is used, the voltage V
When the pulse shaping circuit 330 is charged with, the voltage V / 2 is applied to the primary coil 313 of the transformer 311 at the time of discharging. On the other hand, a Bloomline type high voltage pulse generator 4
00, when the voltage V is charged in the pulse shaping circuit 430, the primary coil 41 of the transformer 411 is discharged at the time of discharging.
A voltage of V is applied to 3. Therefore, in order to supply a desired voltage to the load by using the charging circuit of the same voltage, the winding turns ratio of the transformer of the baseline type high voltage pulse generator 300 is the bloom line type high voltage pulse generator 400. It is necessary to double the number of turns of the transformer.
Generally, when the winding ratio of the primary coil and the secondary coil of the transformer increases, the leakage magnetic flux in the transformer increases, and thus the leakage inductance of the transformer increases. Furthermore, the inductance of the line obtained by converting the transformer primary side to the secondary side increases in proportion to the square of the winding ratio. As the circuit inductance increases, the circuit time constant increases and the trapezoidal shoulder sag of the pulse applied to the primary coil of the transformer increases.

On the other hand, when the Bloomline type high voltage pulse generator 400 is used, the above problem does not occur, but the switch circuit 440 and the drive circuit 420 sandwich the first pulse shaping circuit 430a. In addition, it is necessary to pass through the plurality of inductors 432 after the switch circuit 440 is short-circuited and before the electric charge reaches the drive circuit 430a, which causes a delay in voltage propagation. In particular, when the number of ladder-shaped circuits of the first pulse shaping circuit 430a and the second pulse shaping circuit 430b is increased, the tendency becomes remarkable. Therefore, the trapezoidal shoulder sag of the pulse applied to the primary coil 413 of the transformer 411 increases. On the load side, when the pulse voltage reaches a predetermined value, the electronic gate is opened and the energy is used. Therefore, the pulse voltage until reaching the predetermined value is discarded as heat.

Therefore, the conventional baseline type high voltage pulse generator and the bloom line type high voltage pulse generator have a problem that the energy efficiency cannot be further improved.

The present invention has been devised in view of the above-mentioned problems, and an alternative to the conventional voltage pulse generator is to provide a voltage pulse generator having a fast output pulse rise and good energy efficiency. And

[0022]

In order to achieve the above object, a voltage pulse generator for applying a voltage pulse to a load according to the present invention includes a first transformer and a second transformer in which a secondary coil is connected in series to the load. A load side circuit having a transformer of
It has a first pulse shaping circuit which is connected to a pair of first output terminals and which has a circuit element for storing charge for charging, and a circuit element which is connected to a pair of second output terminals and which stores a charge for charging. A second pulse shaping circuit, a first primary coil of the first transformer and a second primary coil of the second transformer between one end of the first output end and one end of the second output end. A drive side circuit in which a primary coil is connected in series, and a connection point between the first primary coil and the second primary coil are connected to the other end of the first output end and the second output end. A switch circuit having a switch element capable of being short-circuited to the end,
When the switch element is connected, the current flows in the same direction in the first secondary coil and the second secondary coil.

According to the configuration of the present invention, the switch circuit short-circuits the connection point between the first primary coil and the second primary coil to the other end of the first output end and the other end of the second output end. Then, the electric charge charged in the first pulse shaping circuit flows to the first primary coil via the first output terminal, and the induced current flows in the first secondary coil to charge the second pulse shaping circuit. Electric charge flows through the second output coil to the second primary coil, and the induced current flows through the second secondary coil, the current flowing through the first secondary coil and the second secondary coil. Since the currents flow in the same direction and are added and applied to the load, a circuit with a small impedance can be configured as a whole, and a high-voltage pulse with a quick rise and less energy loss can be applied to the load.

Furthermore, in the voltage pulse generator according to the present invention, one of the first transformer and the second transformer has the same polarity and the other has the opposite polarity. According to the configuration of the present invention, one of the first transformer and the second transformer has the same polarity and the other has the opposite polarity. Therefore, when the switch element is connected, the first circuit and the second transformer have a simple circuit configuration. It is possible to allow currents to flow in the same direction in the secondary coil and the second secondary coil.

Further, in the voltage pulse generator according to the present invention, the circuit element has a capacitor connected in parallel. With the above-described configuration of the present invention, since the circuit element has the capacitor connected in parallel, a pulse shaping circuit having a simple structure can be configured with a lumped element.

In the voltage pulse generator according to the present invention, the circuit element has a coaxial cable. With the above configuration of the present invention, since the circuit element has the coaxial cable, it is possible to configure a compact pulse shaping circuit with the distributed constant element.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first preferred embodiment of the present invention will be described below with reference to the drawings. In each drawing, common portions are denoted by the same reference numerals, and redundant description will be omitted.

The structure of the high voltage pulse generator according to the first embodiment of the present invention will be described. FIG. 1 is a circuit conceptual diagram of the first embodiment of the present invention.

The high voltage pulse generator 100 according to the first embodiment of the present invention is a device for applying a high voltage pulse to a load, and includes a load side circuit 110, a drive side circuit 120, and a first pulse shaping circuit. 130a Second pulse shaping circuit 13
0b, a switch circuit 140, and a charging circuit 150. The load side circuit 110 is a circuit that supplies a high voltage current to the load 1, and includes the first transformer 111a and the second transformer 1a.
11b. The first secondary coil 112a of the first transformer 111a and the second secondary coil 112b of the second transformer 111b are connected to the load 1 in series.

The first pulse shaping circuit 130a is a circuit which outputs a pulse while shaping the charged electric charge, and stores the electric charge for charging which is connected to the pair of first output terminals 133a and 134a. It has a circuit element to do. The circuit element is formed by connecting the capacitor 131 and the inductor 132 in a ladder shape. The capacitor 131 is arranged in a circuit corresponding to a horizontal bar of the ladder circuit, and the inductor 132 is arranged in a circuit corresponding to a vertical column of the ladder circuit. The ends of the vertical columns of the ladder circuit form a pair of first output ends 133a, 134a.

The second pulse shaping circuit 130b is a circuit for outputting a pulse while shaping the charged electric charge, and stores the electric charge for charging connected to the pair of first output terminals 133b and 134b. It has a circuit element to do. The circuit element is formed by connecting the capacitor 131 and the inductor 132 in a ladder shape. The capacitor 131 is arranged in a circuit corresponding to a horizontal bar of the ladder circuit, and the inductor 132 is arranged in a circuit corresponding to a vertical column of the ladder circuit. The ends of the vertical columns of the ladder circuit form a pair of second output ends 133b and 134b.

The drive side circuit 120 is the first transformer 11
1a of the first primary coil 113a and the second transformer 11
1b is a circuit for applying a voltage to the second primary coil 113b, and the first primary coil 1 is provided between the one end 133a of the first output end and the one end 133b of the second output end.
13a and the second primary coil 114b are connected in series. That is, one end 133a of the first output end is connected to one end of the first primary coil 113a, and the first primary coil 1
The other end of 13a is connected to one end of the second primary coil 113b, and the other end of the second primary coil 113b is connected to one end 133b of the second output end. Here, for convenience of explanation, the other end of the first primary coil 113 a and the second primary coil 11 a
A point connecting one end of 3b is called an intermediate connection point 121. The switch circuit described later is short-circuited to make the first primary coil 11
3a and the second primary coil 113b when a current flows,
The wiring is so arranged that the direction of the current flowing through the first secondary coil 112a and the direction of the current flowing through the second secondary coil 112b are the same. Preferably, the first transformer 11
It is preferable that one of 1a and the second transformer 111b has the same polarity and the other has the opposite polarity.

The switch circuit 140 is the pulse shaping circuit 1
The first primary coil 11 is made to discharge the electric charge charged in 30
3a and the second primary coil 113b, which is a circuit that leads to
It has a switch element 141. The switch element can short-circuit the intermediate connection point 121 between the first primary coil 113a and the second primary coil 113b to the other end 134a of the first output end and the other end 134b of the second output end. .

The charging circuit 150 is a pulse shaping circuit 130.
And a power supply 151. The power supply 151 is connected in parallel with the capacitor 131 of the ladder circuit of the first pulse shaping circuit.

Next, the operation of the high voltage pulse generator according to the first embodiment will be described. First switch circuit 140
Is open. The power supply 151 of the charging circuit 150 supplies the charge for charging the voltage V to the first pulse shaping circuit 130a and the second pulse shaping circuit 130b. First pulse shaping circuit 130a and second pulse shaping circuit 130b
And charges the capacitor 131. When the switch circuit is closed, the electric charge accumulated in the capacitor 131 of the first pulse shaping circuit 130a flows into the first primary coil 113a, and the capacitor 131 of the second pulse shaping circuit 130b.
The electric charge accumulated in the first primary coil 113b flows into the second primary coil 113b.
The voltage applied to the coil is shaped by the pulse shaping circuit 130 and becomes a pulse of voltage V / 2. The pulse has a substantially trapezoidal shape with a gentle shoulder. The voltage is boosted by the transformer and supplied to the load 1. The voltage at the first secondary coil 112a and the voltage at the second secondary coil 112b are added, and the same output as when a pulse of the voltage V is applied to the primary coil of one transformer acts on the load 1. To do. In the load 1, a substantially rectangular pulse having a desired voltage by an electronic gate is supplied to, for example, a high frequency generating electron tube.

The structure of the high voltage pulse generator according to the second embodiment of the present invention will be described. FIG. 2 is a circuit conceptual diagram of the second embodiment of the present invention. Only the points different from the first embodiment will be described.

The first pulse shaping device 230a and the second pulse shaping device 230b are coaxial cables.
The central axis and the shield of the first pulse shaping device 230a are connected to the pair of first output ends 233a and 234a, respectively, and the central axis and the shield of the second pulse shaping device 230b are respectively the pair of first output ends. It is connected to 233b and 234b.

The operation of the high voltage pulse generator according to the second embodiment is the same as that of the voltage pulse generator according to the first embodiment, and the description thereof will be omitted.

Next, the energy efficiency of the high voltage pulse generator according to the first embodiment is compared with the energy efficiency of the baseline type high voltage pulse generator and the bloom line type high voltage pulse generator under the same conditions. While evaluating. The energy efficiency of the high-voltage pulse generator according to the second embodiment is the same as the concept of energy efficiency of the high-voltage pulse generator according to the first embodiment, so description thereof will be omitted.

First, the time constant at the pulse rise of the high voltage pulse generator is evaluated. The trapezoidal pulse applied to the primary coil of the transformer is a superposition of a plurality of pulses discharged from a plurality of capacitors of the pulse shaping circuit. Therefore, by focusing on the first pulse and calculating the time constant, the time constant at the pulse rise can be evaluated.

The following table shows the inductance that affects the charge of the first pulse (hereinafter referred to as the initial pulse) for each type.

[Table 1]

The above table will be described. Here, the fruit of the present invention
High-voltage pulse generator and bloom line type according to the embodiment
The turns ratio of the transformer of the high voltage pulse generator is 1: n.
The baseline type high voltage pulse generator
The winding turns ratio is 1: 2n. Also, pal
The inductance of the first stage inductor of the molding machine is L
_PFNIs.

First, the pulse that affects the initial pulse
Consider the inductance of the molded circuit. Embodiment of the present invention
In the high voltage pulse generator related to
The electric charge charged in the nearby capacitor changes the voltage of the first pulse
Form. With switch element, transformer and its capacitor
Since there is only one inductor in the closed loop,
Pulse shaping circuit inductor that affects the initial pulse
L is_PFNIs. On the other hand, in the bloom line type,
Closed loop made of switch element, transformer and its capacitor
Since there are n inductors in the loop,
The pulse shaping circuit inductance that affects is n × L
_PFNIs. In the baseline type, switching elements and
Of the inductor inside the closed loop formed by the
Since there is only one connector, it affects the initial pulse.
Loose forming circuit inductance is L _PFNIs.

Next, the pulse pulse that affects the initial pulse is
Consider lance leakage inductance. Of the present invention
In the high voltage pulse generator according to the embodiment, the winding ratio is
Pulse transformer leakage inductance of the transformer that is n
Closet L_l2Then, since there are two transformers,
Of the high voltage pulse generator according to the first embodiment
Three cage inductance is 2L_l2Is. on the other hand,
The number of turns in a Bloomline type high voltage pulse generator
Since one transformer with n is used,
Pulse leakage of a high voltage pulse generator
Inductance is L_l2Is. Baseline type high voltage power supply
In the loose generator, the transformer part with a winding ratio of 2n
Loose transformer leakage inductance is L_l1To
And the pulse transformer of the baseline type high voltage pulse generator.
Three-cage inductance is L _l1Is. In general,
L_l1Is L₁₂Will be larger than.

Next, the inductance of the line in which the primary side of the transformer, which affects the initial pulse, is converted to the secondary side will be examined. In the high voltage pulse generator according to the embodiment of the present invention, if the inductance of the transformer primary side line (line length of about 2 m) is L, the inductance of the line obtained by converting the transformer primary side to the secondary side is n ² L. On the other hand, in the Bloomline type high voltage pulse generator, the inductance of the line obtained by converting the transformer primary side to the secondary side is n ² L
Is. In the baseline type high voltage pulse generator, since the number of turns is 2n, the inductance of the line obtained by converting the transformer primary side to the secondary side is 4n ² L.

The sum of the inductance of the pulse shaping circuit, the pulse transformer leakage inductance, and the inductance of the line obtained by converting the transformer primary side to the secondary side affects the initial pulse. If the sum is referred to as L _all, in the specification of the actual high-voltage pulse generating device, L _all of the high voltage generating apparatus according to an embodiment of the present invention, L _all baseline high-voltage Blumlein-type high voltage generator It is smaller than L _{all of the} generator.

Then, the rising time T of the initial pulse
Is represented by a circuit time constant, and its value is given by the following equation.

[Formula 1]

[0048]

EXAMPLE An example will be described based on the specifications of an actual high voltage pulse generator. Select the specifications of the high voltage pulse generator as follows. Transformer step-up ratio n = 8 Transformer primary side line inductance L = 2 μH Pulse transformer leakage inductance L _l1 = 1.7 μH L _l2 = 1.5 μH One stage inductance of pulse shaping circuit L _PFN = 1 μH Number of pulse shaping circuit stages n = 20 stages, one stage capacitor capacity of pulse shaping circuit C = 3.5 mF

The inductances of the three types of high voltage pulse generators are as follows.

[Table 2]

The rising times T of the pulses of the three types of high voltage pulse generating circuits are as follows.

[Table 3] From this result, it can be seen that the voltage pulse generator according to the embodiment of the present invention has a shorter pulse rise time than the conventional voltage pulse generator.

Next, a computer simulation result of the high voltage pulse generator having the above specifications will be described. Figure 3
FIG. 6 is a diagram showing a simulation result of the voltage pulse generator according to the embodiment of the present invention. FIG. 4 is a comparison diagram of energy loss of three types of high voltage pulse generators.

The pulse waveform output from the high voltage pulse deriving apparatus according to the embodiment of the present invention is compared with the pulse waveform of the Bloomline type high voltage pulse deriving apparatus and the pulse waveform of the baseline type high voltage pulse deriving apparatus, It can be seen that the voltage quickly rises and reaches the rated voltage in a short time, and the voltage rapidly falls and drops in a short time. When the energy of the ideal pulse is 1.0, the energy of the high voltage pulse generator according to the embodiment of the present invention is 1.45.
On the other hand, the energy of the Bloomline type high voltage pulse generator is 1.6 and the energy of the baseline type high voltage pulse generator is 1.9. The energy loss is lower as the energy is lower, so the high voltage pulse generator according to the embodiment of the present invention has the lowest energy loss among the three types of high voltage pulse generators.

By using the high-voltage pulse generator of the above-described embodiment, the circuit impedance affecting the initial pulse can be reduced and the rising edge of the initial pulse can be accelerated. Moreover, since the pulse waveform applied to the load is close to a rectangle, energy loss is reduced.

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the gist of the invention. In the illustrated circuit, the output end of the pulse shaping circuit on the side where the inductor is connected is connected to the secondary coil, but the present invention is not limited to this.For example, the output end on the side where the inductor is not connected is connected to the primary coil. You may. Further, although two pulse shaping circuits are used in the description of the embodiment, the present invention is not limited to this, and three or more pulse shaping circuits may be used.

[0055]

As described above, the high voltage pulse generator for applying a high voltage pulse to the load of the present invention has the following effects due to its configuration. When the switch circuit short-circuits the connection point between the first primary coil and the second primary coil to the other end of the first output end and the other end of the second output end, the first pulse shaping circuit is charged. The electric charge flows to the first primary coil via the first output terminal, the induced current flows to the first secondary coil, and the electric charge charged in the second pulse shaping circuit passes through the second output terminal. Then, the induced current flows to the second primary coil and the induced current flows to the second secondary coil, and the current flowing to the first secondary coil and the current flowing to the second secondary coil flow in the same direction and are added. Since it is applied to the load, it is possible to form a circuit having a small impedance as a whole, and to apply a high-voltage pulse having a quick rise and less energy loss to the load. Further, since one of the first transformer and the second transformer has the same polarity and the other has the opposite polarity, when the switching element is connected, the first secondary coil and the It is possible to make a current flow in the same direction as the second secondary coil. Further, since the circuit element has a capacitor connected in parallel, a pulse shaping circuit having a simple structure can be constituted by a lumped constant element. Further, since the circuit element has the coaxial cable, a compact pulse shaping circuit can be configured with the distributed constant element. Therefore, it is possible to provide a high-voltage pulse generator with high energy efficiency by speeding the rising of the output pulse.

[0056]

[Brief description of drawings]

FIG. 1 is a circuit diagram of a first embodiment of the present invention.

FIG. 2 is a circuit diagram of a second embodiment of the present invention.

FIG. 3 is a diagram showing a simulation result of the embodiment of the present invention.

FIG. 4 is a comparison diagram of energy loss of three types of high voltage pulse generators.

FIG. 5 is a circuit diagram of a baseline type high voltage pulse generator.

FIG. 6 is a circuit diagram of a Bloomline high voltage pulse generator.

[Explanation of symbols]

1 load 100 Voltage Pulse Generator According to First Embodiment 110 Load side circuit 111a first transformer 111b Second transformer 112a First secondary coil 112b Second secondary coil 113a First primary coil 113b Second primary coil 120 drive side circuit 121 Intermediate connection point 130a First pulse shaping circuit 130b Second pulse shaping circuit 131 capacitors 132 inductor 133a One end of the first output end 133b One end of the second output end 134a The other end of the first output end 134b The other end of the second output end 140 switch circuit 141 switch element 150 charging circuit 151 power supply 200 Voltage Pulse Generator According to Second Embodiment 210 Load side circuit 211a First transformer 211b Second transformer 212a First secondary coil 212b Second secondary coil 213a First primary coil 213b Second primary coil 220 Drive side circuit 221 Intermediate connection point 230a First pulse shaping circuit 230b Second pulse shaping circuit 231 Core wire of coaxial cable 232 Coaxial cable shield wire 233a One end of the first output end 233b One end of the second output end 234a The other end of the first output end 234b The other end of the second output end 240 switch circuit 241 switch element 250 charging circuit 251 power supply 300 Baseline High Voltage Pulse Generator 310 Load side circuit 311 transformer 312 secondary coil 313 Primary coil 320 Drive side circuit 330 pulse shaping circuit 331 capacitor 332 inductor 333 One end of output end 334 Other end of output end 340 switch circuit 341 switch element 350 charging circuit 351 power supply 400 Bloom line type high voltage pulse generator 410 Load side circuit 411 transformer 412 Secondary coil 413 Primary coil 420 Drive side circuit 430a First pulse shaping circuit 430b Second pulse shaping circuit 431 capacitor 432 inductor 433a One end of the first output end 433b One end of the second output end 434a The other end of the first output end 434b The other end of the second output end 440 switch circuit 441 switch element 450 charging circuit 451 power supply

Claims (4)

[Claims] 1. A voltage pulse generator for applying a voltage pulse to a load, comprising: a load side circuit having a first transformer and a second transformer in which a secondary coil is connected in series to the load; and a pair of first and second transformers. A first pulse shaping circuit having a circuit element connected to one output end for storing charge for charging, and a second pulse forming circuit having a circuit element connected to a pair of second output ends for storing charge for charging. A pulse shaping circuit, a first primary coil of the first transformer and a second primary coil of the second transformer between one end of the first output end and one end of the second output end. Drive side circuit connected in series, the connection point between the first primary coil and the second primary coil to the other end of the first output end and the other end of the second output end. A switch circuit having a switch element capable of being short-circuited; A voltage pulse generator characterized in that when a child is connected, a current flows in the same direction in the first secondary coil and the second secondary coil. 2. The voltage pulse generator according to claim 1, wherein one of the first transformer and the second transformer has the same polarity and the other has the opposite polarity. 3. The voltage pulse generator according to claim 1, wherein the circuit element has a capacitor connected in parallel. 4. The voltage pulse generator according to claim 1, wherein the circuit element has a coaxial cable.