A double "field" - shaped iron core structure
By designing a double "田"-shaped iron core structure, the problem of increased size and cost caused by the increased number of iron cores in rectifier transformers with multi-pulse output is solved, achieving more efficient pulse output and cost control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BAODING TIANWEI GROUP TEBIAN ELECTRIC
- Filing Date
- 2023-12-12
- Publication Date
- 2026-07-10
AI Technical Summary
When more pulse output is required, existing rectifier transformers face the problem of increased size and cost due to the increased number of iron cores.
The double "田" shaped iron core structure is adopted. By combining three sets of vertically arranged iron core columns with five sets of horizontally arranged iron yokes, two sets of "田" shaped structures are stacked one above the other, which can achieve more than 24 pulses of output, reduce the number of iron cores and reduce volume and cost.
Achieving 48-pulse output on a single iron core reduces the number of iron cores, shrinks the size, and lowers production costs.
Smart Images
Figure CN117809941B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of transformers, and particularly relates to a double "field" - shaped iron core structure. Background Art
[0002] A rectifier transformer is a power device that provides power for rectification equipment. Rectification equipment has very wide applications in industrial production such as metallurgy, chemical industry, hydrogen production, etc. A large number of non - linear load components such as thyristors are used in rectification equipment. During operation, these non - linear load components will inevitably generate a large amount of harmonics. The harmonics are fed back to the power grid through the rectifier transformer, which will cause serious pollution to the power grid and reduce the power quality of the power grid. To improve this situation, a multi - pulse design is carried out on the rectifier transformer to cancel out a certain number of harmonics inside the rectifier transformer and reduce the harmonic content fed back to the power grid by the rectifier transformer. With the continuous increase in the capacity of rectifier transformers, the demand for rectifier transformers with multi - pulse output is increasing. Existing pulse rectifier transformers are increasingly unable to meet the usage requirements, resulting in more harmonics entering the power grid, polluting the power grid, and reducing the power quality of the power grid. The existing iron core structures of rectifier transformers are generally horizontally placed "day" - shaped or conjugate types, and at most 24 - pulse output can be achieved on one iron core. In the case of requiring more pulse output, the number of iron cores needs to be increased, resulting in an increase in the volume and cost of the rectifier transformer. Summary of the Invention
[0003] The purpose of the invention is to provide a double "field" - shaped iron core structure, aiming to solve the problem that when more pulse output is required, the increase in the number of iron cores leads to an increase in the volume and cost of the rectifier transformer.
[0004] To achieve the above purpose, the technical solution adopted by the invention is: to provide a double "field" - shaped iron core structure, including three vertically arranged iron core columns and five horizontally arranged yokes. The three iron core columns are arranged in sequence from left to right. The five yokes are respectively the first upper yoke, the second middle yoke, the third middle yoke, the fourth middle yoke, and the fifth lower yoke arranged in sequence from top to bottom. The first upper yoke is arranged at the upper ends of the three iron core columns, the fifth lower yoke is arranged at the lower ends of the three iron core columns, and the second middle yoke, the third middle yoke, and the fourth middle yoke are arranged in the middle of the iron core columns.
[0005] In a possible implementation, the transverse cross - sectional areas of the three iron core columns are equal.
[0006] In a possible implementation, the longitudinal cross - sectional area of the first upper yoke is equal to the transverse cross - sectional area of the iron core column.
[0007] In a possible implementation, the longitudinal cross-sectional area of the fifth lower yoke is equal to the transverse cross-sectional area of the core column.
[0008] In a possible implementation, the longitudinal cross-sectional area of the third intermediate yoke is 30% - 50% of the transverse cross-sectional area of the core column.
[0009] In a possible implementation, the longitudinal cross-sectional area of the second intermediate yoke is 10% - 20% of the transverse cross-sectional area of the core column, and the longitudinal cross-sectional area of the fourth intermediate yoke is 10% - 20% of the transverse cross-sectional area of the core column.
[0010] In a possible implementation, the longitudinal cross-sectional area of the second intermediate yoke is equal to the longitudinal cross-sectional area of the fourth intermediate yoke.
[0011] In a possible implementation, the core column has a multi-stage circular cross-section.
[0012] In a possible implementation, the first upper yoke has a multi-stage circular cross-section or a multi-stage D-shaped cross-section, and the fifth lower yoke has a multi-stage circular cross-section or a multi-stage D-shaped cross-section.
[0013] In a possible implementation, the second intermediate yoke has a single-stage square cross-section or a two-stage cross-section, the third intermediate yoke has a single-stage square cross-section or a two-stage cross-section, and the fourth intermediate yoke has a single-stage square cross-section or a two-stage cross-section.
[0014] The beneficial effects of a double "field" - shaped core structure provided by the present invention are as follows:
[0015] Compared with the prior art, there are three vertically arranged core columns and five horizontally arranged yokes. The three core columns are arranged in a row, sequentially arranged from left to right, and the five yokes are sequentially arranged from top to bottom, which are the first upper yoke, the second intermediate yoke, the third intermediate yoke, the fourth intermediate yoke, and the fifth lower yoke respectively. The first upper yoke and the fifth lower yoke are respectively arranged at the upper and lower ends of the core column, and the second intermediate yoke, the third intermediate yoke, and the fourth intermediate yoke are arranged in the middle of the core column. The three core columns and the five yokes form two "field" - shaped core structures stacked up and down, improving the core magnetic circuit, being applicable to various rectifier transformer bodies, achieving an output of more than 24 pulses on one core, being able to achieve a 48 - pulse output, reducing the number of cores, shrinking the core volume, and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0017] Figure 1 It is a structural schematic diagram of the double "field" - shaped iron core structure provided by the embodiments of the present invention.
[0018] In the figure: 1. Left iron core column; 2. Middle iron core column; 3. Right iron core column; 4. First upper yoke; 5. Second left yoke; 6. Second right yoke; 7. Third left yoke; 8. Third right yoke; 9. Fourth left yoke; 10. Fourth right yoke; 11. Fifth lower yoke. Specific embodiments
[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.
[0020] Please refer to Figure 1 , and now a specific embodiment of the double "field" - shaped iron core structure provided by the present invention is described. It includes three groups of vertically arranged iron core columns and five groups of horizontally arranged yokes. The three groups of iron core columns are arranged in sequence from left to right. The five groups of yokes are the first upper yoke 4, the second middle yoke, the third middle yoke, the fourth middle yoke, and the fifth lower yoke 11 arranged in sequence from top to bottom. The first upper yoke 4 is arranged at the upper ends of the three groups of iron core columns, the fifth lower yoke 11 is arranged at the lower ends of the three groups of iron core columns, and the second middle yoke, the third middle yoke, and the fourth middle yoke are arranged in the middle of the iron core columns.
[0021] A double "field" - shaped iron core structure provided by the present invention, compared with the prior art, is provided with three groups of vertically arranged iron core columns and five groups of horizontally arranged yokes. The three groups of iron core columns are arranged in a row and in sequence from left to right. The five groups of yokes are arranged in sequence from top to bottom, which are the first upper yoke 4, the second middle yoke, the third middle yoke, the fourth middle yoke, and the fifth lower yoke 11 respectively. The first upper yoke 4 and the fifth lower yoke 11 are respectively arranged at the upper and lower ends of the iron core columns, and the second middle yoke, the third middle yoke, and the fourth middle yoke are arranged in the middle of the iron core columns. The three groups of iron core columns and the five groups of yokes form two "field" - shaped iron core structures stacked up and down, improving the iron core magnetic circuit, being applicable to various rectifier transformer bodies, achieving an output of more than 24 pulses on one iron core, and can achieve a 48 - pulse output, reducing the number of iron cores, shrinking the volume of the iron core, and reducing the production cost.
[0022] Specifically, please refer to Figure 1 , which includes three groups of core columns and five groups of yokes. The core columns are vertically arranged, and the three groups of core columns are arranged in a row from left to right, namely the left core column 1, the middle core column 2, and the right core column 3. The yokes are horizontally arranged, and the five groups of yokes are arranged in a column from top to bottom, namely the first upper yoke 4, the second middle yoke, the third middle yoke, the fourth middle yoke, and the fifth lower yoke 11. The first upper yoke 4 is installed at the upper ends of the left core column 1, the middle core column 2, and the right core column 3. The fifth lower yoke 11 is arranged at the lower ends of the left core column 1, the middle core column 2, and the right core column 3. The second middle yoke, the third middle yoke, and the fourth middle yoke are arranged in the middle of the core columns. The second middle yoke includes symmetrically arranged second left yoke 5 and second right yoke 6. The second left yoke 5 and the second right yoke 6 are located in the same plane. The second left yoke 5 is arranged between the left core column 1 and the middle core column 2, and the second right yoke 6 is arranged between the right core column 3 and the middle core column 2. The third middle yoke includes symmetrically arranged third left yoke 7 and third right yoke 8. The third left yoke 7 and the third right yoke 8 are located in the same plane. The third left yoke 7 is arranged between the left core column 1 and the middle core column 2, and the third right yoke 8 is arranged between the right core column 3 and the middle core column 2. The fourth middle yoke includes symmetrically arranged fourth left yoke 9 and fourth right yoke 10. The fourth left yoke 9 and the fourth right yoke 1 respectively located in the same plane. The fourth left yoke 9 is arranged between the left core column 1 and the middle core column 2, and the fourth right yoke 10 is arranged between the right core column 3 and the middle core column 2. The first upper yoke 4, the second middle yoke, the third middle yoke, the fourth middle yoke, and the fifth lower yoke 11 are evenly distributed in the height direction of the core columns. The third middle yoke connects the upper and lower two "field"-shaped core structures, combining the upper and lower two conjugate core structures into one, reducing the weight of the yoke.
[0023] As a specific embodiment of the double "field"-shaped core structure provided by the present invention, please refer to Figure 1 , and the transverse cross-sectional areas of the three groups of core columns are equal.
[0024] Specifically, please refer to Figure 1 , and the transverse cross-sectional areas of the middle parts of the left core column 1, the middle core column 2, and the right core column 3 far from the upper and lower ends are equal, and the shapes of the transverse cross-sections are the same.
[0025] As a specific embodiment of the double "field"-shaped core structure provided by the present invention, please refer to Figure 1 , and the longitudinal cross-sectional area of the first upper yoke 4 is equal to the transverse cross-sectional area of the core column.
[0026] Specifically, please refer to Figure 1, in the vertical direction, the longitudinal cross-sectional area of the part of the first upper yoke 4 far from the core column is equal to the transverse cross-sectional area of the core column.
[0027] Further, please refer to Figure 1 , the longitudinal cross-section of the first upper yoke 4 is the same as the transverse cross-section of the core column.
[0028] As a specific embodiment of the double "field" - shaped core structure provided by the present invention, please refer to Figure 1 , the longitudinal cross-sectional area of the fifth lower yoke 11 is equal to the transverse cross-sectional area of the core column.
[0029] Specifically, please refer to Figure 1 , in the vertical direction, the longitudinal cross-sectional area of the part of the fifth lower yoke 11 far from the core column is equal to the transverse cross-sectional area of the core column.
[0030] Further, please refer to Figure 1 , the longitudinal cross-section of the fifth lower yoke 11 is the same as the transverse cross-section of the core column, and the first upper yoke 4 and the fifth lower yoke 11 are symmetrically arranged.
[0031] As a specific embodiment of the double "field" - shaped core structure provided by the present invention, please refer to Figure 1 , the longitudinal cross-sectional area of the third middle yoke is 30% - 50% of the transverse cross-sectional area of the core column.
[0032] Specifically, please refer to Figure 1 , in the vertical direction, the longitudinal cross-sectional areas of the parts of the third left yoke 7 and the third right yoke 8 far from the core column are 30% - 50% of the transverse cross-sectional area of the core column, and the calculated magnetic flux density of the third middle yoke does not exceed 1.4T.
[0033] As a specific embodiment of the double "field" - shaped core structure provided by the present invention, please refer to Figure 1 , the longitudinal cross-sectional area of the second middle yoke is 10% - 20% of the transverse cross-sectional area of the core column, and the longitudinal cross-sectional area of the fourth middle yoke is 10% - 20% of the transverse cross-sectional area of the core column.
[0034] Specifically, please refer to Figure 1 , in the vertical direction, the longitudinal cross-sectional areas of the parts of the second left yoke 5 and the second right yoke 6 far from the core column are 10% - 20% of the transverse cross-sectional area of the core column, the calculated magnetic flux density of the second middle yoke should not exceed 1.0T, the longitudinal cross-sectional areas of the parts of the fourth left yoke 9 and the fourth right yoke 10 far from the core column are 10% - 20% of the transverse cross-sectional area of the core column, and the calculated magnetic flux density of the fourth middle yoke should not exceed 1.0T.
[0035] As a specific embodiment of the double "field" - shaped iron core structure provided by the present invention, please refer to Figure 1 that the longitudinal cross - sectional area of the second intermediate yoke is equal to that of the fourth intermediate yoke.
[0036] Specifically, please refer to Figure 1 that the second intermediate yoke and the fourth intermediate yoke are symmetrically arranged. In the same vertical plane, the longitudinal cross - sectional shapes of the second intermediate yoke and the fourth intermediate yoke are the same, and the longitudinal cross - sectional areas are equal.
[0037] As a specific embodiment of the double "field" - shaped iron core structure provided by the present invention, please refer to Figure 1 that the iron core column has a multi - level circular cross - section.
[0038] Specifically, please refer to Figure 1 that the iron core column adopts a multi - level circular cross - section, which is convenient for production and improves the utilization rate of the cross - section of the core column.
[0039] As a specific embodiment of the double "field" - shaped iron core structure provided by the present invention, please refer to Figure 1 that the first upper yoke 4 has a multi - level circular cross - section or a multi - level D - shaped cross - section, and the fifth lower yoke 11 has a multi - level circular cross - section or a multi - level D - shaped cross - section.
[0040] Specifically, please refer to Figure 1 that the first upper yoke 4 adopts a multi - level circular cross - section or a multi - level D - shaped cross - section, which is convenient for production and improves the utilization rate of the cross - section of the core column.
[0041] As a specific embodiment of the double "field" - shaped iron core structure provided by the present invention, please refer to Figure 1 that the second intermediate yoke has a single - level square cross - section or a two - level cross - section, the third intermediate yoke has a single - level square cross - section or a two - level cross - section, and the fourth intermediate yoke has a single - level square cross - section or a two - level cross - section.
[0042] Specifically, please refer to Figure 1 that the second intermediate yoke, the third intermediate yoke and the fourth intermediate yoke adopt a single - level square cross - section, or the second intermediate yoke, the third intermediate yoke and the fourth intermediate yoke adopt a two - level cross - section.
[0043] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.
Claims
1. A double "field" - shaped iron core structure, characterized in that, It includes three vertically arranged iron core columns and five horizontally arranged yokes. The three iron core columns are arranged in sequence from left to right. The five yokes are respectively the first upper yoke, the second middle yoke, the third middle yoke, the fourth middle yoke, and the fifth lower yoke arranged in sequence from top to bottom. The first upper yoke is arranged at the upper ends of the three iron core columns, the fifth lower yoke is arranged at the lower ends of the three iron core columns, and the second middle yoke, the third middle yoke, and the fourth middle yoke are arranged in the middle of the iron core columns; the transverse cross-sectional areas of the three iron core columns are equal; the longitudinal cross-sectional area of the first upper yoke is equal to the transverse cross-sectional area of the iron core column; the longitudinal cross-sectional area of the fifth lower yoke is equal to the transverse cross-sectional area of the iron core column; the second middle yoke includes symmetrically arranged second left yoke and second right yoke, the third middle yoke includes symmetrically arranged third left yoke and third right yoke, and the fourth middle yoke includes symmetrically arranged fourth left yoke and fourth right yoke; the longitudinal cross-sectional area of the third middle yoke is 30% - 50% of the transverse cross-sectional area of the iron core column, and the longitudinal cross-sectional areas of the second middle yoke and the fourth middle yoke are both 10% - 20% of the transverse cross-sectional area of the iron core column and are equal; the three iron core columns and the five yokes form two "field"-shaped iron core structures stacked up and down, and the third middle yoke connects the upper and lower two "field"-shaped iron core structures, combining the upper and lower two conjugate iron core structures into one.
2. The double "field" - shaped iron core structure according to claim 1, wherein, The iron core column has a multi-level circular cross-section.
3. The double "field" - shaped iron core structure according to claim 2, wherein The first upper yoke has a multi-level circular cross-section or a multi-level D-shaped cross-section, and the fifth lower yoke has a multi-level circular cross-section or a multi-level D-shaped cross-section.
4. A double "field" - shaped iron core structure as claimed in claim 3, characterized in that, The second middle yoke has a single-level square cross-section or a two-level cross-section, the third middle yoke has a single-level square cross-section or a two-level cross-section, and the fourth middle yoke has a single-level square cross-section or a two-level cross-section.