CN114039495A - Low leakage inductance boosting power transformer for electron beam high-voltage acceleration power supply - Google Patents
Low leakage inductance boosting power transformer for electron beam high-voltage acceleration power supply Download PDFInfo
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- CN114039495A CN114039495A CN202111256706.0A CN202111256706A CN114039495A CN 114039495 A CN114039495 A CN 114039495A CN 202111256706 A CN202111256706 A CN 202111256706A CN 114039495 A CN114039495 A CN 114039495A
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- 238000010894 electron beam technology Methods 0.000 title claims abstract description 26
- 230000001133 acceleration Effects 0.000 title claims description 19
- 238000004804 winding Methods 0.000 claims abstract description 99
- 238000009413 insulation Methods 0.000 claims 2
- 238000003466 welding Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 3
- 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
- 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
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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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
Abstract
The invention belongs to the technical field of transformers, and particularly relates to a low-leakage-inductance boosting power transformer for an electron beam high-voltage accelerating power supply. The boosting power transformer comprises a plurality of groups of same transformer sub-modules; each group of transformer sub-modules comprises a sub-module transformer magnetic core, an insulating cylinder, a primary winding and a secondary winding; the insulating cylinder column is sleeved on the magnetic core of the sub-module transformer; the primary winding is wound on the outer side of the insulating cylinder; the ends of the primary windings of each group of the transformer sub-modules are sequentially connected in series to form a primary winding series circuit, and two ends of the primary winding series circuit are input ends of the boosting power transformer. The boosting power transformer can provide stable and reliable output voltage for an accelerating power supply in an electron beam welding system, and further realize stable output of electron beam current.
Description
Technical Field
The invention belongs to the technical field of transformers, and particularly relates to a low-leakage-inductance boosting power transformer for an electron beam high-voltage accelerating power supply.
Background
In the existing electron beam welding equipment, an acceleration power supply is mainly used for providing an acceleration electric field to realize the acceleration of electrons. The accelerated electrons obtain enough kinetic energy, and under the convergence action of the focusing coil, electron beams are formed to bombard the workpiece, so that the workpiece is melted to achieve the purpose of welding. The higher the acceleration voltage, the greater the energy gained by the electrons. The working voltage of the medium-voltage electron beam welding machine is 60kV mostly, the maximum output voltage of the accelerating power supply is 60kV, and the output voltage of the high-voltage electron beam welding machine is 150 kV. To achieve such a high acceleration voltage, the boost circuit usually adopts the following three ways: 1. a single group of transformers directly boosts and then rectifies and filters; 2. the primary windings of the multiple groups of transformers are connected with the secondary windings in parallel and are rectified and filtered after being boosted in series; 3. the transformer is connected in series with a voltage doubling rectifying circuit for boosting.
It can be seen that the transformer is an essential core component in the boost circuit of the acceleration power supply. The electron beam acceleration voltage is obtained by adopting the 3 boosting modes, and the characteristic of the acceleration power supply boosting circuit is obviously influenced by the characteristic of the boosting transformer. Because the booster transformer needs to boost the lower input voltage value of the primary side to a higher output voltage value, the transformation ratio of the transformer is very large, and meanwhile, the number of turns of the secondary winding is large, so that the leakage inductance of the secondary winding is very large. Because the energy of the leakage inductance cannot pass through the magnetic core, the energy of the leakage inductance cannot be quickly released when the transformer works in no-load, 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 the theoretical value. When the transformer works with load, the leakage inductance energy is released to enable the output voltage of the transformer to be rapidly reduced, and finally the output accelerating voltage is unstable.
In order to ensure the stability of the accelerating voltage, the input voltage of the transformer needs to be adjusted in real time, and high requirements are provided for a preceding 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 order to solve the problems, the invention provides a low leakage inductance boosting power transformer for an electron beam high-voltage accelerating power supply, which comprises a plurality of groups of identical transformer sub-modules;
each group of transformer sub-modules comprises a sub-module transformer magnetic core, an insulating cylinder, a primary winding and a secondary winding; the insulating cylinder column is sleeved on the magnetic core of the sub-module transformer;
the primary winding is wound on the outer side of the insulating cylinder; the ends of the primary windings of each group of the transformer sub-modules 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 boosting 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 each group of the transformer sub-modules are sequentially connected in series to form a secondary winding series circuit, and the two ends of the secondary winding series circuit are the output ends of the boosting power transformer.
Furthermore, the sub-module 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 are arranged in an aligned mode, the two ends of the two groups of first magnetic core sections are respectively provided with a group of second magnetic core sections, and the two groups of first magnetic core sections are connected through the second magnetic core sections to form a closed magnetic circuit.
Furthermore, in each group of the transformer sub-modules, the insulating cylinder is sleeved on one group of the first magnetic core sections, and the primary winding is wound on the outer side of the insulating cylinder;
and the secondary winding is wound on the other group of the first magnetic core sections.
Further, the primary winding and the secondary winding are enameled wires.
Furthermore, in one group of the transformer sub-modules, one end of the secondary winding is electrically connected with the sub-module transformer magnetic core, and the other end of the secondary winding is electrically connected with the next group of sub-module transformer magnetic cores or the rear-stage circuit.
The invention has the beneficial effects that:
1. the secondary windings of the step-up transformer are proportionally split into multiple parts 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 core of the sub-module transformer, the coupling between the windings and the magnetic core is greatly improved, the leakage inductance of the secondary windings is reduced, and the loading capacity of the step-up transformer is enhanced.
2. The boosting power transformer can provide stable and reliable output voltage for an accelerating power supply in an electron beam welding system, and further realize stable output of electron beam current.
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 will 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 in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 shows a low leakage inductance boost power transformer structure for an electron beam high voltage acceleration power supply according to an embodiment of the present invention;
FIG. 2 shows a schematic diagram of a low leakage inductance boost power transformer circuit for an electron beam high voltage accelerating power supply according to an embodiment of the invention;
fig. 3 shows a sub-module structure diagram of a low leakage inductance boost power transformer for an electron beam high voltage acceleration power supply according to an embodiment of the invention.
In the figure: 1-a first transformer submodule; 111-a first core segment; 112-a second core segment; 113-interface surface; 121-insulating cylinder column; 122-primary winding; 131-secondary winding; 2-a second transformer submodule; 3-a third transformer submodule.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a low leakage inductance boosting 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 and isolated from the magnetic core through the insulating cylinder, and the secondary winding is directly wound on the magnetic core.
For example, as shown in fig. 1, in the embodiment of the present invention, the boost power transformer includes three sets of transformer sub-modules for example. The low leakage inductance boosting 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 submodule 1 is taken as an example for explanation. The first transformer submodule 1 comprises 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 segments 111 are arranged in parallel and in alignment, and two ends of the two groups of first magnetic core segments 111 are respectively provided with a group of second magnetic core segments 112 which are connected through the second magnetic core segments 112 to form a closed magnetic circuit. The interface 113 is a plane where two groups of first magnetic core segments 111 are connected with the same side of the second magnetic core segment 112.
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 realizes the insulating isolation between the primary winding 122 and the magnetic core of the sub-module transformer. The ends of the primary windings 122 of each set of transformer sub-modules 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 boosting power transformer.
The secondary winding 131 is wound around the other set of first core segments 111. One end of the secondary winding 131 is connected with the sub-module transformer magnetic core; the other end is a voltage output end which is connected with the submodule transformer magnetic cores of the next group of transformer submodules. The ends of the secondary windings 131 of each set of transformer sub-modules are sequentially connected in series to form a secondary winding series circuit, and the two ends of the secondary winding series circuit are the output ends of the boosting power transformer.
Specifically, the primary winding 122 and the secondary winding 131 are both enameled wires.
Further, as shown in fig. 1, in the low leakage inductance boost power transformer, one end of the primary winding 122 of 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 submodule 1 is connected with one end of the primary winding 122 on the second transformer submodule 2; the other end of the primary winding 122 of the second transformer submodule 2 is connected to the other end of the primary winding 122 of the third transformer submodule 3. The primary windings 122 of each set of transformer sub-modules are implemented to receive the input voltage in series.
One end of the secondary winding 131 on the first transformer submodule 1 and one end of the secondary winding 131 of the third transformer submodule 3 are transformer output ends; the other end of the secondary winding 131 on the first transformer submodule 1 is connected with one end of the secondary winding 131 on the second transformer submodule 2; the other end of the secondary winding 131 of the second transformer submodule 2 is connected to the other end of the secondary winding 131 of the third transformer submodule 3. The ends of the secondary windings 131 of each set of transformer sub-modules are sequentially connected in series to form a secondary winding series circuit, and the two ends of the secondary winding series circuit are the output ends of the boosting 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 core on the respective transformer sub-module.
The secondary windings of the step-up transformer are proportionally split into multiple parts 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 core of the sub-module transformer, the coupling between the windings and the magnetic core is greatly improved, the leakage inductance of the secondary windings is reduced, and the loading capacity of the step-up transformer is enhanced.
According to the low leakage inductance boosting power transformer for the electron beam high-voltage accelerating power supply, the enameled wire is wound on the insulating cylinder to form the primary winding 122 of the transformer submodule; the first magnetic core section 111 of the sub-module transformer magnetic core penetrates through the inner core of the insulating cylinder column 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 submodule, wherein one end of the secondary winding 131 is connected with the submodule transformer magnetic core, and the other end of the secondary winding is an output end and is connected with the next submodule transformer magnetic core or a later circuit; and sequentially connecting primary and secondary windings 131 of a plurality of transformer sub-modules in series to form the complete boosting power transformer. The circuit schematic diagram of the boosting power transformer is shown in fig. 2, and the boosting 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, and further realize stable output of electron beam current.
Although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. A low leakage inductance boosting power transformer for an electron beam high-voltage acceleration power supply is characterized by comprising a plurality of groups of identical transformer submodules;
each group of the transformer sub-modules comprises a sub-module 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 submodule transformer magnetic core;
the primary winding (122) is wound on the outer side of the insulating cylinder column (121); the ends of primary windings (122) of each group of transformer sub-modules are sequentially connected in series to form a primary winding series circuit, and two ends of the primary winding series circuit are input ends of the boosting power transformer;
the secondary winding (131) is wound on the sub-module transformer magnetic core, and one end of the secondary winding (131) is connected with the sub-module transformer magnetic core; the ends of the secondary windings (131) of each group of transformer sub-modules are sequentially connected in series to form a secondary winding series circuit, and the two ends of the secondary winding series circuit are the output ends of the boosting power transformer.
2. The low leakage inductance boost power transformer for electron beam high voltage acceleration power supply according to claim 1, characterized in that, the sub-module transformer magnetic core comprises a first magnetic core section (111) and a second magnetic core section (112), two sets of the first magnetic core sections (111) are arranged in parallel and in alignment, two sets of the second magnetic core sections (112) are respectively arranged at two ends of the two sets of the first magnetic core sections (111), and are connected through the second magnetic core sections (112) to form a closed magnetic circuit.
3. The low leakage inductance boost power transformer for electron beam high voltage acceleration power supply according to claim 2, characterized in that in each set of the transformer sub-modules, the insulation cylinder (121) is sleeved on a set of the first magnetic core segment (111), and the primary winding (122) is wound outside the insulation cylinder (121);
the secondary winding (131) is wound on the other group of first magnetic core segments (111).
4. A low leakage inductance boost power transformer for electron beam high voltage acceleration power supply according to any of claims 1-3, characterized in that the primary winding (122) and the secondary winding (131) are enameled wires.
5. The booster power transformer with low leakage inductance for electron beam high voltage accelerating power supply of claim 4, characterized in that in one set of the transformer sub-modules, one end of the secondary winding (131) is electrically connected to the sub-module transformer core, and the other end of the secondary winding (131) is electrically connected to the next set of sub-module transformer cores or the next stage 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 CN114039495B (en) | 2024-04-09 |
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2021
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