CN216647970U

CN216647970U - Bipolar voltage output pulse transformer and system

Info

Publication number: CN216647970U
Application number: CN202122902427.9U
Authority: CN
Inventors: 殷毅; 李志强; 王弘刚; 洪志强
Original assignee: Hunan Huacheng Maichuang Electronic Technology Co ltd
Current assignee: Hunan Huacheng Maichuang Electronic Technology Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-05-31
Anticipated expiration: 2031-11-24

Abstract

The utility model discloses a bipolar voltage output pulse transformer and a system, the bipolar voltage output pulse transformer comprises an outer shell, an inner shell, a primary coil and a secondary coil, cavities are formed in the outer shell and the inner shell, the primary coil and the secondary coil are arranged in the outer shell, the secondary coil comprises a positive voltage output secondary coil and a negative voltage output secondary coil which are respectively wound on the outer surface of the inner shell, and a positive voltage output end and a negative voltage output end which are respectively connected with the positive voltage output secondary coil and the negative voltage output secondary coil correspondingly to output positive voltage and negative voltage. The utility model has the advantages of simple and compact structure, low cost, small volume and weight, high coupling coefficient and energy efficiency and the like.

Description

Bipolar voltage output pulse transformer and system

Technical Field

The utility model relates to the technical field of pulse power equipment, in particular to a bipolar voltage output pulse transformer and a system.

Background

A transformer is an electromagnetic device that is based on faraday's law of electromagnetic induction and is capable of transferring electrical energy in one circuit to another circuit through a magnetic field. Pulse transformers are a special type of transformer which transforms not a continuous voltage but a pulsed voltage, the charging time usually being in the range of tens of μ s to hundreds of μ s. Under the pulse condition, the insulation breakdown characteristic of the transformer is obviously better than that under the continuous voltage, so that the pulse transformer has a more compact structure compared with a conventional transformer with variable continuous voltage. Pulse power devices including pulse transformers and the like have been widely used in various fields such as medical treatment, food sterilization, high-power microwaves, high-energy lasers and the like.

The pulse transformer is a key device for realizing high-voltage pulse charging of a high-voltage pulse generator (such as a Marx generator). The charging mode of the high-voltage pulse generator comprises a single-polarity charging mode and a positive-negative charging mode, wherein the high-voltage pulse generator adopting the single-polarity charging mode is adopted, the number of high-power switches in the high-voltage pulse generator is consistent with the number of stages of the high-voltage pulse generator, and the number of the high-power switches in the high-voltage pulse generator adopting the positive-negative charging mode is only half of the number of stages of the high-voltage pulse generator, so that the number of the switches of the positive-negative charging mode can be reduced by half, and the working reliability of the high-voltage pulse generator can be remarkably improved.

For a high-voltage pulse generator with positive and negative charging, at present, two separate boosting power supplies and transformers are generally adopted to charge capacitors with different stages in the high-voltage pulse generator positively and negatively, that is, two independent pulse transformers are adopted to respectively provide positive and negative voltages. However, in the above-mentioned manner of using two independent pulse transformers to provide positive and negative voltages, two sets of transformer devices are required at the same time, which increases the volume and weight, the implementation cost and the structural complexity of the whole system, and when the pulse transformer is applied to a high-voltage pulse output field, because a single pulse transformer has a high output voltage amplitude and the maximum field strength inside the corresponding transformer is high, the coupling coefficient and the energy efficiency of the pulse transformer are not high, so that a long charging time is required for charging the high-voltage pulse generator.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: aiming at the technical problems in the prior art, the utility model provides the bipolar voltage output pulse transformer and the system which have the advantages of simple and compact structure, low cost, small volume and weight and high coupling coefficient and energy efficiency.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows:

the utility model provides a bipolar voltage output pulse transformer, includes shell body, interior casing, primary coil and secondary line, the inside of shell body, interior casing all is formed with the cavity, interior casing, primary coil, secondary coil set up the inside of shell body, secondary coil includes positive voltage output secondary coil and negative voltage output secondary coil, winds respectively and establishes on the surface of interior casing, still be provided with positive voltage output end and negative voltage output end on the shell body, respectively correspond with positive voltage output secondary coil, negative voltage output secondary coil are connected with output positive, negative voltage.

Furthermore, the positive voltage output secondary coil and the negative voltage output secondary coil are wound on the outer surface of the inner shell in the same direction, and one ends of the positive voltage output secondary coil and one ends of the negative voltage output secondary coil are connected to form a common ground joint.

Further, the inner housing includes a first housing portion for winding the positive voltage output secondary coil and a second housing portion for winding the negative voltage output secondary coil.

Further, the first housing part and/or the second housing part are in a conical cylindrical structure, and the diameter of the conical cylindrical structure is gradually increased towards the middle part.

Further, the primary coils include more than two sets of primary coil groups, and each set of primary coil groups is connected in parallel.

Furthermore, one end of each set of the primary coil assembly is led out from the outer shell and then connected in parallel to form an input end, and the other end of each set of the primary coil assembly is connected with a common ground joint of the secondary coil inside the outer shell.

Furthermore, the inner surface of the outer shell is provided with a groove for fixedly arranging the primary coil.

Further, an outer surface of the inner case and/or the secondary coil is coated with an insulating coating.

The positive and negative 50kV output pulse transformer comprises the pulse transformer, and the pulse transformer outputs positive 50kV voltage and negative 50kV voltage respectively through the positive voltage output end and the negative voltage output end.

A high-voltage pulse generator system comprises a high-voltage pulse generator for generating high-voltage pulses and the pulse transformer, wherein the pulse transformer is connected with a charging power supply end of the high-voltage pulse generator, and positive and negative voltages are output by the pulse transformer and are supplied to the high-voltage pulse generator.

Compared with the prior art, the utility model has the advantages that: the pulse transformer disclosed by the utility model does not need to use a magnetic core, the output voltage is positive and negative bipolar, the bipolar high-voltage pulse output can be realized by using one pulse transformer, and compared with the traditional mode that two pulse transformers are used for respectively outputting positive and negative voltages, the pulse transformer system disclosed by the utility model can greatly reduce the volume and weight of the transformer system, improve the overall structural compactness of the pulse transformer system, is not only simple and convenient to use and operate, but also has higher coupling coefficient and energy efficiency compared with the traditional single pulse transformer.

Drawings

Fig. 1 is a schematic structural diagram of a bipolar voltage output pulse transformer according to embodiment 1 of the present invention.

Fig. 2 is a schematic view of the structural principle of the inner housing 2 in embodiment 1 of the present invention.

Fig. 3 is a schematic diagram of a structural principle of a test circuit in embodiment 2 of the present invention.

FIG. 4 is a graph showing the test results obtained in example 2 of the present invention.

Illustration of the drawings: 1. an outer housing; 2. an inner housing; 201. a first housing portion; 202. a second housing portion; 3. a primary coil; 301. a first primary coil group; 302. a second primary coil set; 4. a secondary coil; 401. a positive voltage output secondary coil; 402. a negative voltage output secondary coil; 5. outputting; 501. a positive voltage output terminal; 502. a negative voltage output terminal; 601. a first output baffle; 602. a second output baffle; 7. a primary coil input; 8. and a common ground terminal.

Detailed Description

The utility model is further described below with reference to the drawings and specific preferred embodiments of the description, without thereby limiting the scope of protection of the utility model.

Example 1:

as shown in fig. 1, the bipolar voltage output pulse transformer of the present embodiment includes an outer housing 1, an inner housing 2, a primary coil 3 and a secondary coil 4, a cavity is formed inside the outer housing 1 and the inner housing 2, the primary coil 3 and the secondary coil 4 are disposed inside the outer housing 1, the secondary coil 4 includes a positive voltage output secondary coil 401 and a negative voltage output secondary coil 402, the positive voltage output secondary coil 401 and the negative voltage output secondary coil 402 are respectively wound on an outer surface of the inner housing 2, an output terminal 5 is further disposed on the outer housing 1, the output terminal 5 includes a positive voltage output terminal 501 and a negative voltage output terminal 502, the positive voltage output terminal 501 and the negative voltage output terminal 502 are respectively connected to the positive voltage output secondary coil 401 and the negative voltage output secondary coil 402 to output positive and negative voltages, wherein the positive voltage output terminal 501 is connected to the positive voltage output secondary coil 401 for outputting positive voltage, the negative voltage output terminal 502 is connected with the negative voltage output secondary coil 402 for outputting a negative voltage.

The pulse transformer does not need to use a magnetic core, the output voltage is positive and negative bipolar, namely bipolar high-voltage pulse output can be realized by using one pulse transformer, compared with the traditional mode that two pulse transformers are used for respectively outputting positive and negative voltages, the size and the weight of a transformer system can be greatly reduced, the integral structure compactness of the system is improved, the use and the operation are simple and convenient, and compared with the traditional single pulse transformer, the pulse transformer can also have higher coupling coefficient and energy efficiency.

When the pulse transformer is applied to charging high-power and high-voltage pulse generators such as a Marx generator, the pulse transformer can output positive and negative bipolar voltages and can be respectively connected to two ends of a load in a positive and negative charging mode, so that the output voltage amplitude of the pulse transformer can be greatly reduced, the maximum field intensity in the transformer can be obviously reduced due to the reduction of the output voltage, the coupling coefficient and the energy efficiency are effectively improved, the required pulse charging time is greatly reduced, and the charging efficiency is improved.

In this embodiment, the positive voltage output secondary coil 401 and the negative voltage output secondary coil 402 are wound around the outer surface of the inner housing 2 in the same direction, one ends of the positive voltage output secondary coil 401 and the negative voltage output secondary coil 402 are further connected to form a common ground, and the other ends of the positive voltage output secondary coil 401 and the negative voltage output secondary coil 402 are respectively connected to the positive voltage output terminal 501 and the negative voltage output terminal 502, so as to realize respective output of positive and negative high voltages.

In this embodiment, the inner housing 2 includes a first housing portion 201 for winding a positive voltage output secondary coil 401 and a second housing portion 202 for arranging a negative voltage output secondary coil 402, the winding areas of the first and

second housing portions

201 and 202 are not overlapped, i.e. the positive voltage output secondary coil 401 and the negative voltage output secondary coil 402 are respectively wound on different positions of the outer surface of the inner housing 2, so as to avoid mutual interference between the coils.

No interval may be provided between the first casing section 201 and the second casing section 202, that is, the inner casing 2 is divided into two sections, namely, the first casing section 201 and the second casing section 202, on which the positive voltage output secondary coil 401 and the negative voltage output secondary coil 402 are respectively provided; certainly, according to actual requirements, a certain interval may be provided between the first casing portion 201 and the second casing portion 202, that is, the inner casing 2 is sequentially divided into the first casing portion 201, the interval and the second casing portion 202, and the secondary coil is not wound in the interval, so as to increase an isolation space between the positive voltage output secondary coil 401 and the negative voltage output secondary coil 402, and further reduce mutual interference between the coils.

In this embodiment, the first housing portion 201 and the second housing portion 202 are respectively in a conical cylindrical structure, the diameter of the conical cylindrical structure gradually decreases toward the middle, and the diameter gradually decreases toward the left and right ends, i.e. the diameter gradually decreases from the middle toward the left and right ends, as shown in fig. 2, there is a partial overlap between the first housing portion 201 and the second housing portion 202 in the middle (as shown in the ring shape in the middle of fig. 2), which can facilitate the fixing of the two housing portions. By adopting the conical structure, the insulation distance between the high-voltage output part and the input part of the primary winding (primary coil) of the transformer can be increased, the insulation distance between the primary and secondary sides of the transformer is increased under the condition that the insulation distance meets the requirement, and the coupling coefficient of the transformer can be further improved.

It is understood that, the first housing portion 201 and the second housing portion 202 may be provided with only one of the portions as a tapered cylindrical structure, and the other as a cylindrical structure with other shapes (such as a uniform cylindrical shape, a square shape, etc.), and even the first housing portion 201 and the second housing portion 202 may also adopt other cylindrical structures, which may be configured according to actual requirements.

In a specific application embodiment, the secondary coil 4 is tightly wound on the inner housing 2 by using an enameled wire, and the inner housing 2 can be a cylindrical housing made of an insulating material such as nylon; the inner housing 2 is divided into two symmetrical sections from the middle position in the axial direction, corresponding to the first housing part 201 and the second housing part 202, each section is a cone structure, that is, the whole shape of the inner housing 2 is formed by splicing two cone structures, the large diameters of the cones are connected together, the small diameters of the cones are respectively arranged at two ends of the inner housing 2, a secondary coil (corresponding to the positive voltage output secondary coil 401 and the negative voltage output secondary coil 402) is wound at each section in the same direction, the two secondary coils are connected at the center position in the axial direction to be used as a common ground point, the common ground point is simultaneously connected with the ground point of the primary coil 3, and is led out through the output end of the middle outer housing 1 through a screw rod and the like. The left and right ends of the outer shell 1 are provided with output baffles (a first baffle 601 and a second baffle 602), each output baffle is provided with a copper screw at the center (or at a non-center position) and connected with the output end of the secondary coil 4 as the high voltage output ends (a positive voltage output end 501 and a negative voltage output end 502) of the transformer, the positive voltage output secondary coil 401 and the negative voltage output secondary coil 402 are respectively output through the output ends at the center positions of the output baffles except one end of a common ground connection point, so that the respective output of positive and negative high voltages is realized.

The left and right sequence of the positive voltage output secondary winding 401 and the negative voltage output secondary winding 402, and the positive voltage output terminal 501 and the negative voltage output terminal 502 in the transformer can be determined according to the actual situation.

In this embodiment, the primary coil 3 includes two primary coil groups, and the two primary coil groups are connected in parallel. The primary coil 3 can be conveniently led out from the inside of the transformer by adopting a mode of parallel winding of the two groups of coils, so that the grounding connection of the primary coil 3 and the secondary coil 4 is facilitated, the stray inductance of a primary circuit is reduced, the insulation between the primary coils 3 is ensured, the primary circuit impedance of the transformer can be reduced, the efficiency of the transformer is improved, and the consistency of positive and negative output voltages of the transformer is ensured to be good. The primary coil 3 can reduce the influence of stray parameters by introducing low inductance, and the energy efficiency is improved.

It can be understood that the primary coil 3 can be formed by winding more than three primary coil groups according to actual requirements, in addition to two primary coil groups, so as to meet different input requirements.

In this embodiment, one end of each primary coil group is led out from the outer casing 1 and then connected in parallel to form a primary coil input end 7, and the other end of each primary coil group is connected to a common ground connection end 8 of the output secondary coil 4 inside the outer casing 1. The mode that two groups of primary coils are connected in parallel is adopted, and the common ground end of each group of primary coil group is led out from the axial middle part of the transformer, so that the stray inductance of a primary loop can be reduced, and the insulativity between the primary coil groups is ensured.

In this embodiment, the inner surface of the outer casing 1 is provided with a groove for fixedly arranging the primary coil 3, that is, the primary coil 3 is fixed in the groove on the inner side of the outer casing 1, so that the displacement of the primary coil 3 caused by vibration due to excessive electromotive force in the charging process can be prevented. The groove formed in the inner surface of the outer shell 1 is rectangular and spiral, the spiral grooves are arranged at intervals among turns and used for 3-turn insulation of the primary coil, and the interval distance among the turns of the spiral grooves can be more than 3 mm. The shape of the groove can be set to other shapes according to actual requirements.

In a specific application embodiment, the primary coil 3 is wound by copper strips, the primary copper strips are fixed in grooves on the inner side of the outer shell 1, the outer shell 1 can be of a cylindrical structure made of nylon or other high polymer insulating materials, the primary copper strips are wound in two groups in parallel, the starting ends of the two groups of primary coil groups are led out of the outer shell 1 through copper screws, the two groups of primary coil groups are connected in parallel outside the transformer through copper strips and serve as high-voltage input ends of the primary coil of the transformer, and the two groups of primary coil groups are connected with a common ground end 8 of a secondary coil 4 of the pulse transformer inside the transformer. Two sets of primary coil specifically pass through the copper screw rod to be fixed on the shell body 1 of transformer, and the copper screw rod passes through screw hole and nut fixed connection with shell body 1, and the screw hole is non-through-hole structural design, therefore has good insulating properties between 3 terminal of primary coil and the inside secondary coil 3 of transformer. Through the structure, the primary copper strip of the transformer can still work normally under the condition of outputting the high-power pulse current 1.

In this embodiment, the outer surface of the inner housing 2 and the secondary coil 4 are coated with a layer of insulating coating, which can enhance the insulation between the primary coil 3 and the secondary coil 4, and can fix the secondary coil 4 to prevent the secondary coil from falling off due to the excessive inter-turn electromotive force of the coil when the coil passes kiloampere current in an extremely short charging cycle (e.g., tens of microseconds). The insulating coating can be epoxy glue insulating paint or other insulating materials. In a specific application embodiment, before the secondary coil 4 is wound, the outer surface of the inner casing 2 may be coated with an insulating coating in advance, and after the secondary coil 4 is wound, the surface of the secondary coil 4 may be coated with an insulating coating again. It is of course also possible to apply an insulating coating only on the outer surface of the inner housing 2 or only on the output secondary coil 4, depending on the actual requirements.

The edge at outer casing 1, interior casing 2 both ends is provided with seal assembly and is used for setting up seal assembly's recess in this embodiment, and seal assembly can be the sealing washer etc. to ensure shell body 1, interior casing 2's leakproofness. When the insulating property between primary coils of the transformer needs to be enhanced, transformer oil can be filled into the outer shell 1, in the process of filling the transformer oil, a mode of combining vacuumizing and vibration exhaust can be adopted, bubbles in the transformer can be conveniently removed, and the insulating property can be enhanced by filling sulfur hexafluoride gas.

The pulse transformer can efficiently realize positive and negative bipolar voltage output, and can be applied to various fields requiring the use of pulse transformers, such as medical treatment, food sterilization, high-power microwaves, high-energy lasers and the like.

Example 2:

as shown in fig. 2, the pulse transformer with positive and negative 50kV output of this embodiment includes the pulse transformer described in embodiment 1, that is, includes an outer casing 1, an inner casing 2, a primary coil 3 and a secondary coil 4, wherein cavities are formed inside the outer casing 1 and the inner casing 2, the primary coil 3 and the secondary coil 4 are disposed inside the outer casing 1, the secondary coil 4 includes a positive voltage output secondary coil 401 and a negative voltage output secondary coil 402, the positive voltage output secondary coil 401 and the negative voltage output secondary coil 402 are respectively wound on the outer surface of the inner casing 2, an output terminal 5 is further disposed on the outer casing 1, the output terminal 5 includes a positive voltage output terminal 501 and a negative voltage output terminal 502, the positive voltage output terminal 501 and the negative voltage output terminal 502 are respectively connected to the positive voltage output secondary coil 401 and the negative voltage output secondary coil 402 to output positive voltage, And a negative voltage, wherein the positive voltage output terminal 501 is connected with the positive voltage output secondary coil 401 for outputting a positive 50kV voltage, and the negative voltage output terminal 502 is connected with the negative voltage output secondary coil 402 for outputting a negative 50kV voltage.

In this embodiment, the primary coil 3 is specifically wound by a copper tape with a width of 12mm and a thickness of 2mm, and the copper tape is fixed in a groove inside the outer shell 1 for 5.9 turns, so as to ensure that the primary coil of the transformer does not generate displacement due to electromotive force caused by large current of discharge in the discharge process, and ensure good insulation between turns of the primary coil. After the primary coils are connected in parallel, the inductance is specifically Lp being 5.0uH, and the internal resistance of the primary coils is 2.58 mOmega.

In the embodiment, the tail ends of the two groups of primary coils are fixed on the outer cylinder of the transformer through copper screws, the copper screws are fixedly connected with the outer cylinder of the transformer through threaded holes and nuts, and the tail ends of the primary coils are connected in parallel outside the transformer and are used as a primary high-voltage input end of the transformer, so that a primary copper strip of the transformer can still work normally under the condition of passing a pulse current of 100 kA.

In this embodiment, the secondary coil 4 is formed by tightly winding enamelled wires with a diameter of 1mm on the outer surface of the conical inner shell, the enamelled wires are spliced into two conical structures in shape, the conical large diameter parts are connected together, the conical small diameter parts are respectively arranged at two ends of the transformer, the total number of turns of the enamelled wires is 190 turns, the number of turns of each conical cylinder is 95 turns, a joint is reserved at the center of each enamelled wire, and the enamelled wire is tightly connected with the primary ground end of the transformer through a screw rod.

The magnetic induction inside the secondary winding is assumed to be uniformly distributed and equal to the average of the magnetic induction on the axis of the secondary winding. This embodiment equates the secondary winding to a radius r_sAccording to the major diameter r of the conical secondary coil_s1Small r of conical secondary coil_s2Number of turns of secondary winding N_sAxial length diameter of secondary coil I_sThe secondary of the isoparametric transformer has the total inductance of 4.64mH and the internal resistance of the secondary coil is 2.4 omega.

In the specific application embodiment, the transformer structure of the present embodiment is integrally modeled, and two secondary coils are taken as a whole without adding a magnetic core, the coupling coefficient of the primary coil 3 and the secondary coil 4 reaches 0.94, the primary interstage mutual inductance is 0.14mH, and compared with a single transformer outputting 100kV, the pulse transformer of the present embodiment increases the primary interstage insulation distance due to high voltage at the output end, and the distance from the minimum diameter of the conical inner housing 2 to the inner surface of the outer housing 1 of the transformer is more than 15mm, so the coupling coefficient is only about 0.87, that is, the pulse transformer of the present embodiment has a higher coupling coefficient.

In order to verify the effectiveness of the present invention, in a specific application embodiment, the electric pulse transformer of this embodiment is used to charge a six-stage Marx generator positively and negatively, as shown in fig. 3, a primary capacitor of the transformer is selected to be Cp equal to 0.6mF, an initial charging voltage is 2.5kV, a secondary load of the transformer is a Marx generator, and the transformer is composed of six-stage capacitors C1-C6, each stage of the capacitor is 100nF, an internal inductance of each stage of the capacitor is L10-L15, a magnitude of 72nH, an internal resistance of R10-R15, and a magnitude of 4m Ω; the positive and negative output ends of the transformer charge the capacitors of each stage through an isolation inductor L1-L6, the isolation inductor is 45uH, the equivalent internal resistance is R1-R6, and the size is 0.2 omega; wherein C1, C3 and C5 are positively charged, and C2, C4 and C6 are negatively charged. L7, L8 and L9 are grounding isolation inductors, 45uH, Sw1, Sw2 and Sw3 are Marx generator gas switches, Sout is connected with a load to be a Marx output end gas switch, and the four groups of switches realize control of conduction time through P1-P4.

The voltage waveforms Vpositive and Vnegative of the pulse transformer for charging Marx positively and negatively are shown in FIG. 4, and the primary side current waveform Ip and the load voltage waveform Vload of the transformer are shown in FIG. 4, so that the time from positive and negative charging to the highest voltage is 40us, the primary current of the transformer is 27kA at the maximum, and the secondary current of the transformer is 0.53kA at the maximum; the transformer can charge all levels of capacitors of the Marx generator to 53kV in amplitude at 40 mu s; the gas switch on-time was set to 45 mus and a high power electrical pulse with a voltage peak of 305kV and a pulse width of about 50ns was available on the load. Therefore, the single pulse transformer can realize the positive and negative charging of the Marx generator at the high voltage of 50kV, the number of the high-power switches Sw1-Sw3 is only half of the number of the capacitors C1-C6, and the working performance of the pulse transformer is good.

In conclusion, the embodiment adopts a single transformer to realize the pulse output of positive and negative 50kV high voltage, has simple and compact structure, greatly reduces the volume and weight of a transformer system compared with a device needing two positive and negative charges, and has higher coupling coefficient compared with a single pulse transformer outputting 100 kV; the positive and negative 50kV charging of a capacitor bank in the Marx generator is realized under high power, and the volume and weight of the whole charging power supply, the whole transformer and the Marx can be reduced. When a strong electric field generated by 100 kV-magnitude voltage needs to be utilized, under the condition that the voltage level required on a load is not changed, the positive charging mode and the negative charging mode of 50kV are respectively connected to two ends of the load, the amplitude of the output voltage of the pulse transformer can be reduced by half, the maximum field intensity in the transformer is obviously reduced due to the reduction of the output voltage, the structure is compact, and the positive charging pulse transformer and the negative charging pulse transformer can have higher coupling coefficient and energy efficiency.

The embodiment also provides a high-voltage pulse generator system, which comprises a high-voltage pulse generator for generating high-voltage pulses and the pulse transformer, wherein the pulse transformer is connected with the high-voltage pulse generator, and positive and negative voltages are output by the pulse transformer and are supplied to the high-voltage pulse generator.

The foregoing is considered as illustrative of the preferred embodiments of the utility model and is not to be construed as limiting the utility model in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention, unless the technical essence of the present invention departs from the content of the technical solution of the present invention.

Claims

1. The utility model provides a bipolar voltage output pulse transformer, includes shell body (1), interior casing (2), primary coil (3) and secondary coil (4), the inside of shell body (1), interior casing (2) all is formed with the cavity, interior casing (2), primary coil (3), secondary coil (4) set up the inside of shell body (1), its characterized in that: secondary coil (4) are including positive voltage output secondary coil (401) and negative voltage output secondary coil (402), are around establishing respectively on the surface of interior casing (2), still be provided with positive voltage output end (501) and negative voltage output end (502) on shell body (1), respectively correspond with positive voltage output secondary coil (401), negative voltage output secondary coil (402) are connected in order to export just, negative voltage.

2. The bipolar voltage output pulse transformer of claim 1, wherein: the positive voltage output secondary coil (401) and the negative voltage output secondary coil (402) are wound on the outer surface of the inner shell (2) in the same direction, and one ends of the positive voltage output secondary coil (401) and the negative voltage output secondary coil (402) are connected to form a common ground joint.

3. The bipolar voltage output pulse transformer of claim 1, wherein: the inner housing (2) comprises a first housing part (201) for winding the positive voltage output secondary coil (401) and a second housing part (202) for winding the negative voltage output secondary coil (402).

4. The bipolar voltage output pulse transformer of claim 3, wherein: the first housing portion and/or the second housing portion are/is of a conical cylindrical structure, and the diameter of the conical cylindrical structure is gradually increased towards the middle part.

5. The bipolar voltage output pulse transformer of claim 1, wherein: the primary coils (3) comprise more than two groups of primary coil groups, and each group of primary coil groups are connected in parallel.

6. The bipolar voltage output pulse transformer of claim 5, wherein: one end of each group of the primary coil group is led out from the outer shell (1) and then connected in parallel to form an input end, and the other end of each group of the primary coil group is connected with a common ground joint of the secondary coil (4) in the outer shell (1).

7. The bipolar voltage output pulse transformer according to any one of claims 1 to 6, wherein: the inner surface of the outer shell (1) is provided with a groove for fixedly arranging the primary coil (3).

8. The bipolar voltage output pulse transformer according to any one of claims 1 to 5, wherein: the outer surface of the inner housing (2) and/or the secondary coil (4) is coated with an insulating coating.

9. A positive and negative 50kV output pulse transformer, comprising the pulse transformer of any one of claims 1 to 8, wherein the pulse transformer outputs a positive 50kV voltage and a negative 50kV voltage through the positive voltage output terminal (501) and the negative voltage output terminal (502), respectively.

10. A high voltage pulse generator system comprising a high voltage pulse generator for generating high voltage pulses, further comprising a pulse transformer according to any one of claims 1 to 9, said pulse transformer being connected to a charging power supply terminal of said high voltage pulse generator, said pulse transformer outputting positive and negative voltages to be supplied to said high voltage pulse generator.