CN114039495B - Low leakage inductance boost power transformer for electron beam high-voltage accelerating power supply - Google Patents
Low leakage inductance boost power transformer for electron beam high-voltage accelerating power supply Download PDFInfo
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- CN114039495B CN114039495B CN202111256706.0A CN202111256706A CN114039495B CN 114039495 B CN114039495 B CN 114039495B CN 202111256706 A CN202111256706 A CN 202111256706A CN 114039495 B CN114039495 B CN 114039495B
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- 238000010894 electron beam technology Methods 0.000 title claims abstract description 24
- 238000004804 winding Methods 0.000 claims abstract description 99
- 230000001133 acceleration Effects 0.000 abstract description 11
- 238000003466 welding Methods 0.000 abstract description 5
- 238000009413 insulation Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
- H02M5/12—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers for conversion of voltage or current amplitude only
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- Engineering & Computer Science (AREA)
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Abstract
The invention belongs to the technical field of transformers, and particularly relates to a low leakage inductance boost power transformer for an electron beam high-voltage accelerating power supply. The step-up power transformer comprises a plurality of groups of identical transformer sub-modules; each group of transformer submodules comprises a submodule transformer magnetic core, an insulating cylinder column, a primary winding and a secondary winding; the insulation cylinder column is sleeved on the magnetic core of the submodule transformer; the primary winding is wound on the outer side of the insulating cylinder column; the ends of the primary windings of the transformer submodules are sequentially connected in series to form a primary winding series circuit, and the two ends of the primary winding series circuit are input ends of the step-up power transformer. The boost power transformer can provide stable and reliable output voltage for an acceleration power supply in an electron beam welding system, so that stable output of electron beam current is realized.
Description
Technical Field
The invention belongs to the technical field of transformers, and particularly relates to a low leakage inductance boost power transformer for an electron beam high-voltage accelerating power supply.
Background
In the existing electron beam welding equipment, an accelerating power supply is mainly used for providing an accelerating electric field to accelerate electrons. The accelerated electrons obtain enough kinetic energy, and under the converging action of the focusing coil, electron beams are formed to bombard the workpiece, so that the workpiece is melted to achieve the welding purpose. The higher the acceleration voltage, the greater the energy available to the electrons. The working voltage of the medium-voltage electron beam welder is 60kV, the maximum output voltage of an accelerating power supply is 60kV, and the output voltage of the high-voltage electron beam welder is 150kV. To achieve such high acceleration voltages, the boost circuit often employs three approaches: 1. the single-group transformer directly boosts and rectifies and filters; 2. the primary windings and the secondary windings of the multiple groups of transformers are connected in parallel, boosted in series and rectified and filtered; 3. the transformer is connected in series with a voltage doubling rectifying circuit to boost.
It can be seen that the transformer is an essential core component in the accelerating power supply boost circuit. The electron beam accelerating voltage is obtained by adopting the 3 boosting modes, and the characteristics of the accelerating power supply boosting circuit are obviously affected by the characteristics of the boosting transformer. The transformer has a large transformation ratio because the step-up transformer needs to increase the lower input voltage value of the primary side to the higher output voltage value, and the winding turns of the secondary side winding are large, so that leakage inductance of the secondary side winding is very large. Because the energy of the leakage inductance cannot pass through the magnetic core, when the transformer works in no-load, the energy of the leakage inductance cannot be quickly released, and the excited voltage is superposed on the secondary winding of the transformer, so that the output voltage of the secondary winding is far greater than a theoretical value. When the transformer works under load, leakage inductance energy is released, so that the output voltage of the transformer is rapidly reduced, and finally the output acceleration voltage is unstable.
In order to ensure the stable acceleration voltage, the input voltage of the transformer needs to be regulated in real time, and high requirements are put forward on a front-stage circuit of the transformer. Therefore, in order to achieve stable output of the acceleration voltage, it is necessary to improve the output characteristics of the acceleration power supply step-up transformer.
Disclosure of Invention
In view of the above problems, the present invention provides a low leakage inductance boost power transformer for an electron beam high voltage accelerating power supply, the boost power transformer comprising a plurality of groups of identical transformer sub-modules;
each group of transformer submodules comprises a submodule transformer magnetic core, an insulating cylinder column, a primary winding and a secondary winding; the insulation cylinder column is sleeved on the magnetic core of the submodule transformer;
the primary winding is wound on the outer side of the insulating cylinder column; the ends of primary windings of all groups of transformer submodules are sequentially connected in series to form a primary winding series circuit, and the two ends of the primary winding series circuit are input ends of the step-up power transformer;
the secondary winding is wound on the sub-module transformer magnetic core, and one end of the secondary winding is connected with the sub-module transformer magnetic core; the ends of the secondary windings of the transformer submodules are sequentially connected in series to form a secondary winding series circuit, and the two ends of the secondary winding series circuit are output ends of the step-up power transformer.
Further, the submodule transformer magnetic core comprises a first magnetic core section and a second magnetic core section, the two groups of first magnetic core sections are parallel and aligned, a group of second magnetic core sections are arranged at two ends of the two groups of first magnetic core sections respectively, and the two groups of first magnetic core sections are connected through the second magnetic core sections to form a closed magnetic circuit.
Further, in each group of the transformer sub-modules, the insulating cylinder posts are sleeved on one group of the first magnetic core sections, and the primary winding is wound on the outer sides of the insulating cylinder posts;
the secondary winding is wound on another set of first core segments.
Furthermore, the primary winding and the secondary winding are enameled wires.
Further, in one group of the transformer sub-modules, one end of the secondary winding is electrically connected with the sub-module transformer core, and the other end of the secondary winding is electrically connected with the next group of sub-module transformer core or the back-stage circuit.
The beneficial effects of the invention are as follows:
1. the secondary windings of the step-up transformer are split into a plurality of parts in equal proportion and then connected in series, so that the output voltage of each secondary winding is reduced, the secondary windings can be directly wound on the magnetic cores of the sub-module transformer, the coupling between the windings and the magnetic cores is greatly improved, the leakage inductance of the secondary windings is reduced, and the load carrying capacity of the step-up transformer is enhanced.
2. The boost power transformer can provide stable and reliable output voltage for an acceleration power supply in an electron beam welding system, so that stable output of electron beam current is realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 illustrates a block diagram of a low leakage inductance boost power transformer for an electron beam high voltage acceleration power supply in accordance with an embodiment of the present invention;
FIG. 2 illustrates a schematic diagram of a low leakage inductance boost power transformer circuit for an electron beam high voltage acceleration power supply in accordance with an embodiment of the present invention;
fig. 3 shows a low leakage inductance boost power transformer submodule architecture diagram for an electron beam high-voltage boost power supply according to an embodiment of the present invention.
In the figure: 1-a first transformer sub-module; 111-a first magnetic core segment; 112-a second magnetic core segment; 113-interface; 121-an insulating cylinder; 122-primary winding; 131-secondary winding; 2-a second transformer sub-module; 3-a third transformer sub-module.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a low leakage inductance boost power transformer for an electron beam high-voltage accelerating power supply, which comprises a plurality of groups of identical transformer sub-modules, wherein primary windings of the plurality of groups of transformer sub-modules are connected in series to receive input voltage, and secondary windings are connected in series to output voltage. The primary winding is insulated from the magnetic core through the insulating cylinder column, and the secondary winding is directly wound on the magnetic core.
In the embodiment of the present invention, the step-up power transformer includes three groups of transformer sub-modules as shown in fig. 1. The low leakage inductance boost power transformer comprises a first transformer submodule 1, a second transformer submodule 2 and a third transformer submodule 3; the first transformer submodule 1, the second transformer submodule 2 and the third transformer submodule 3 are identical in structure and are sequentially connected in series.
Specifically, as shown in fig. 3, the first transformer sub-module 1 is exemplified. The first transformer submodule 1 includes a submodule transformer core, an insulating cylinder 121, a primary winding 122 and a secondary winding 131. The sub-module transformer core comprises a first core segment 111 and a second core segment 112; the two groups of first magnetic core sections 111 are arranged in parallel and aligned, two ends of the two groups of first magnetic core sections 111 are respectively provided with a group of second magnetic core sections 112, and the two groups of first magnetic core sections are connected through the second magnetic core sections 112 to form a closed magnetic circuit. The interface 113 is a surface where connection points of the two groups of first magnetic core segments 111 and the second magnetic core segment 112 on the same side are located.
The insulating cylinder column 121 is sleeved on the group of first magnetic core sections 111, the primary winding 122 is wound on the outer side of the insulating cylinder column 121, and the insulating cylinder column 121 achieves insulation isolation between the primary winding 122 and the sub-module transformer magnetic core. The ends of the primary windings 122 of the transformer sub-modules of each group are sequentially connected in series to form a primary winding series circuit, and the two ends of the primary winding series circuit are the input ends of the step-up power transformer.
The secondary winding 131 is wound on the other set of first core segments 111. Wherein, one end of the secondary winding 131 is connected with the sub-module transformer core; the other end is a voltage output end and is connected with a submodule transformer core of the next group of transformer submodules. The ends of the secondary windings 131 of the transformer sub-modules of each group are sequentially connected in series to form a secondary winding series circuit, and the two ends of the secondary winding series circuit are output ends of the step-up power transformer.
Specifically, the primary winding 122 and the secondary winding 131 are enameled wires.
Further, as shown in fig. 1, in the low leakage inductance step-up power transformer, one end of the primary winding 122 on the first transformer submodule 1 and one end of the primary winding 122 of the third transformer submodule 3 are transformer input ends; the other end of the primary winding 122 on the first transformer sub-module 1 is connected with one end of the primary winding 122 on the second transformer sub-module 2; the other end of the primary winding 122 on the second transformer sub-module 2 is connected to the other end of the primary winding 122 on the third transformer sub-module 3. The primary windings 122 of each set of transformer sub-modules are implemented to receive an input voltage in series.
One end of the secondary winding 131 on the first transformer sub-module 1 and one end of the secondary winding 131 of the third transformer sub-module 3 are transformer output ends; the other end of the secondary winding 131 on the first transformer sub-module 1 is connected with one end of the secondary winding 131 on the second transformer sub-module 2; the other end of the secondary winding 131 on the second transformer sub-module 2 is connected to the other end of the secondary winding 131 on the third transformer sub-module 3. The ends of the secondary windings 131 of the transformer sub-modules of each group are sequentially connected in series to form a secondary winding series circuit, and the two ends of the secondary winding series circuit are output ends of the step-up power transformer. And one end of the secondary winding on each group of transformer sub-modules is electrically connected with the sub-module transformer magnetic cores on the respective transformer sub-modules.
The secondary windings of the step-up transformer are split into a plurality of parts in equal proportion and then connected in series, so that the output voltage of each secondary winding is reduced, the secondary windings can be directly wound on the magnetic cores of the sub-module transformer, the coupling between the windings and the magnetic cores is greatly improved, the leakage inductance of the secondary windings is reduced, and the load carrying capacity of the step-up transformer is enhanced.
The low leakage inductance boost power transformer for the electron beam high-voltage accelerating power supply provided by the embodiment of the invention adopts enamelled wires to wind on an insulating cylinder column to form a primary winding 122 of a transformer sub-module; the first magnetic core section 111 of the sub-module transformer magnetic core passes through the inner core of the insulating cylinder post 121 and is converged with the second magnetic core section 112 to form a closed-loop magnetic core loop; directly winding the enameled wire on the magnetic core to form a secondary winding 131 of the transformer sub-module, wherein one end of the secondary winding 131 is connected with the transformer magnetic core of the sub-module, the other end is an output end, and the next group of the transformer magnetic core of the sub-module or a rear-stage circuit is connected; the primary and secondary windings 131 of the plurality of transformer sub-modules are serially connected in sequence to form a complete step-up power transformer. The circuit schematic diagram of the step-up power transformer is shown in fig. 2, and the step-up power transformer has the advantages of low leakage inductance, hard output characteristic and the like. The electron beam welding system can provide stable and reliable output voltage for an acceleration power supply, so that stable output of electron beam current is realized.
Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. A low leakage inductance boost power transformer for an electron beam high voltage accelerating power supply, the boost power transformer comprising a plurality of identical sets of transformer sub-modules;
each group of transformer submodules comprises a submodule transformer magnetic core, an insulating cylinder (121), a primary winding (122) and a secondary winding (131); the insulating cylinder column (121) is sleeved on the magnetic core of the submodule transformer;
the primary winding (122) is wound outside the insulating cylinder column (121); the ends of primary windings (122) of all groups of transformer submodules are sequentially connected in series to form a primary winding series circuit, and the two ends of the primary winding series circuit are input ends of the step-up power transformer;
the secondary winding (131) is wound on the submodule transformer magnetic core, and one end of the secondary winding (131) is connected with the submodule transformer magnetic core; the ends of the secondary windings (131) of the transformer submodules of each group are sequentially connected in series to form a secondary winding series circuit, and the two ends of the secondary winding series circuit are output ends of the step-up power transformer;
the submodule transformer magnetic core comprises a first magnetic core section (111) and a second magnetic core section (112), wherein two groups of the first magnetic core sections (111) are arranged in parallel and aligned, two groups of the second magnetic core sections (112) are respectively arranged at two ends of the two groups of the first magnetic core sections (111), and the two groups of the first magnetic core sections are connected through the second magnetic core sections (112) to form a closed magnetic circuit;
in each group of transformer sub-modules, the insulating cylinder columns (121) are sleeved on one group of first magnetic core sections (111), and the primary windings (122) are wound on the outer sides of the insulating cylinder columns (121); the secondary winding (131) is wound on a further set of first core segments (111).
2. A low leakage inductance boost power transformer for an electron beam high voltage accelerating power supply according to claim 1, characterized in that the primary winding (122) and the secondary winding (131) are enameled wires.
3. A low leakage inductance boost power transformer for electron beam high voltage accelerating power supply according to claim 2, wherein in one set of said transformer sub-modules, one end of said secondary winding (131) is electrically connected to a sub-module transformer core, and the other end of said secondary winding (131) is electrically connected to a next set of sub-module transformer cores or a back-end circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111256706.0A CN114039495B (en) | 2021-10-27 | 2021-10-27 | Low leakage inductance boost power transformer for electron beam high-voltage accelerating power supply |
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| CN202111256706.0A CN114039495B (en) | 2021-10-27 | 2021-10-27 | Low leakage inductance boost power transformer for electron beam high-voltage accelerating power supply |
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| CN114039495B true CN114039495B (en) | 2024-04-09 |
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2021
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| CN114039495A (en) | 2022-02-11 |
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