A dual magnetic circuit transformer

Abstract

The utility model relates to a kind of double magnetic circuit transformers, including iron core and multiple windings;Iron core has multiple columns, which are spaced apart along a first direction, and the iron core includes a first magnetic flux array, an insulating plate, and a second magnetic flux array arranged sequentially along a second direction. The first magnetic flux array includes multiple main silicon steel sheets arranged sequentially along the second direction, and the second magnetic flux array includes multiple auxiliary silicon steel sheets arranged sequentially along the second direction. The number of windings is the same as the number of columns, and the windings are wound on the columns one by one. The utility model can avoid a large amount of heat by using two different magnetic circuits of the first magnetic flux array and the second magnetic flux array. The problem of a large amount of heat generated by the transformer is solved.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, specifically to a dual magnetic circuit transformer. Background Technology

[0002] Transformers, as electrical energy conversion devices, are widely used in power systems. Traditional transformers typically employ a single-core structure, where the core is made of laminated silicon steel sheets, forming a closed magnetic circuit. While simple in structure and easy to manufacture, under high load or long-term operating conditions, the single magnetic circuit is prone to magnetic saturation, leading to increased iron losses and decreased efficiency. Furthermore, due to the concentrated magnetic flux, the heat generated inside the core and windings is difficult to dissipate quickly, causing excessively high local temperatures, which severely affects the transformer's service life and operational reliability. Utility Model Content

[0003] Based on the above description, this utility model provides a dual magnetic circuit transformer, which aims to solve the problem of excessive temperature rise in existing transformers that use a single iron core structure.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A dual-magnetic-circuit transformer, comprising: The iron core has a plurality of columns spaced apart along a first direction. The iron core includes a first magnetic flux array, an insulating plate, and a second magnetic flux array arranged sequentially along a second direction. The first magnetic flux array includes a plurality of main silicon steel sheets arranged sequentially along the second direction, and the second magnetic flux array includes a plurality of auxiliary silicon steel sheets arranged sequentially along the second direction. Multiple windings, the number of which is the same as the number of posts, are wound one-to-one on the posts.

[0005] Based on the above technical solution, the present invention can be further improved as follows.

[0006] Furthermore, the main silicon steel sheet is a cold-rolled silicon steel sheet, and the auxiliary silicon steel sheet is a cold-rolled silicon steel sheet or an amorphous alloy.

[0007] Furthermore, it includes heat dissipation components, of which there are two. The iron core has a first wall and a second wall facing each other, and the two heat dissipation components are disposed on the first wall and the second wall in a one-to-one correspondence.

[0008] Furthermore, it includes support plates, which are in pairs, each pair of support plates being symmetrical about a defined axis, and each heat sink is connected to the iron core through a pair of support plates.

[0009] Furthermore, each of the support plates is provided with two first ear plates, and each first ear plate is detachably connected to the corresponding heat sink.

[0010] Furthermore, the device includes two panels, which are symmetrical about a defined axis and form a housing. The iron core and all the windings are located within the housing, and the housing has an opening through which each heat sink can pass.

[0011] Furthermore, the device includes a fixing assembly, wherein each of the support plates is provided with a second ear plate perpendicular to each of the first ear plates, and each second ear plate is connected to the housing via the fixing assembly.

[0012] Furthermore, the box body has a first stepped hole for each of the fixing components. Each fixing component includes a cylindrical body, a positioning sleeve, and a fastener. The cylindrical body is disposed on the second ear plate. A second stepped hole is formed inside the cylindrical body. One end of the positioning sleeve passes through the first stepped hole and is inserted into the first section of the second stepped hole. The flange of the positioning sleeve abuts against the stepped surface of the first stepped hole. One end of the fastener passes through the positioning sleeve and is connected to the second section of the second stepped hole.

[0013] Furthermore, it includes two heat dissipation boxes, which are symmetrical about a defined axis. Each heat dissipation box includes an air inlet pipe, a box body, and an exhaust pipe arranged sequentially along the first direction. The box body has multiple air outlet holes on the side facing the iron core.

[0014] Furthermore, the housing includes a distribution air channel, an exhaust air channel, and a collection air channel connected in sequence. There are multiple exhaust air channels, and each exhaust air channel has multiple air outlets on the side facing the iron core.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: (1) This utility model avoids excessive heat generation by using two magnetic circuits, the first magnetic flux array and the second magnetic flux array, to carry different magnetic fluxes, thus solving the problem of excessive heat generation in transformers.

[0016] (2) This utility model achieves precise positioning by using the first stepped hole to cooperate with the positioning sleeve, which also increases the contact area and provides final locking force through fasteners to ensure a firm connection. This allows for quick and accurate installation and improves assembly efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a sectional view of a dual magnetic circuit transformer provided in an embodiment of the present utility model; Figure 2 This is a side sectional view of a dual magnetic circuit transformer provided in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the assembly of the iron core and winding in an embodiment of this utility model; Figure 4 This is an assembly diagram of the support plate and fixing components in an embodiment of the present utility model; Figure 5 for Figure 4 Enlarged view of a portion of point A in the middle; Figure 6 This is a schematic diagram of the panel structure in an embodiment of the present invention; Figure 7 This is a partial structural diagram of the fixing component in an embodiment of the present utility model; Figure 8 This is a schematic diagram of the heat dissipation fan box in an embodiment of this utility model.

[0019] Explanation of reference numerals in the attached figures: F1, first direction; F2, second direction; 10. Iron core; 11. First magnetic flux array; 1114. Main silicon steel sheet; 12. Insulating board; 13. Second magnetic flux array; 131. Auxiliary silicon steel sheet; 20. Windings; 30. Heat sink components; 40. Support plate; 41. First ear plate; 42. Second ear plate; 50. Panel; 51. First stepped hole; 60. Fixing components; 61. Cylinder body; 62. Positioning sleeve; 63. Fasteners; 70. Heat dissipation fan box; 71. Air inlet pipe; 72. Box body; 721. Air distribution channel; 722. Air exhaust channel; 7221. Air outlet; 723. Air collection channel; 73. Exhaust pipe. Detailed Implementation

[0020] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0022] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0023] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0024] Reference Figure 2 and Figure 3 As shown, this utility model provides a technical solution: a dual magnetic circuit transformer, including an iron core 10 and multiple windings 20; the iron core 10 has multiple columns spaced apart along a first direction F1, the iron core 10 includes a first magnetic flux array 11, an insulating plate 12 and a second magnetic flux array 13 arranged sequentially along a second direction F2, the first magnetic flux array 11 includes multiple main silicon steel sheets 1114 arranged sequentially along the second direction F2, and the second magnetic flux array 13 includes multiple auxiliary silicon steel sheets 131 arranged sequentially along the second direction F2; the number of windings 20 is the same as the number of columns, and the windings 20 are wound one-to-one on the columns.

[0025] by Figure 2 For example, Figure 2 The diagram shows eight rectangular structures, arranged from left to right. The first to fifth rectangular structures are the main silicon steel sheets 1114, the sixth rectangular structure is the insulating board 12, and the seventh to eighth rectangular structures are the auxiliary silicon steel sheets 131.

[0026] In this embodiment, the first magnetic flux array 11 and the second magnetic flux array 13 operate in two phases. During the first startup phase, the magnetic induction intensity and permeability of the first and second magnetic flux arrays 11 and 13 are different. The second magnetic flux array 13 preferentially approaches saturation, resulting in a decrease in both the velocity of permeability and the velocity of magnetic reluctance. According to Ohm's law, the magnetic flux of the first magnetic flux array 11 begins to increase significantly until it reaches saturation. During the second normal operation phase, when the magnetic flux of the first and second magnetic flux arrays 11 and 13 is not saturated, according to Ohm's law, the magnetic flux flows into the first and second magnetic flux arrays 11 and 13 in proportion to their magnetic reluctance, with a larger flow into the first magnetic flux array 11 and a smaller flow into the second magnetic flux array 13. By allowing different magnetic fluxes to flow through the two magnetic circuits of the first and second magnetic flux arrays 11, excessive heat generation can be avoided, thus solving the problem of excessive heat generation in the transformer.

[0027] Optionally, the main silicon steel sheet 1114 is a cold-rolled silicon steel sheet, and the auxiliary silicon steel sheet 131 is a cold-rolled silicon steel sheet or an amorphous alloy.

[0028] For example, the cold-rolled silicon steel sheet in the main silicon steel sheet 1114 can be a high-quality cold-rolled silicon steel sheet, while the cold-rolled silicon steel sheet in the auxiliary silicon steel sheet 131 can be a lower-quality cold-rolled silicon steel sheet.

[0029] In this embodiment, the transformer heating during the first-stage startup process is mainly due to copper and iron losses. After the first magnetic flux array 11 and the second magnetic flux array 13 are connected in parallel, due to their different permeabilities, the magnetic induction intensity of the first magnetic flux array 11 and the second magnetic flux array 13 after saturation is also different. High-quality cold-rolled silicon steel sheets can effectively increase the upper limit of the saturated magnetic induction intensity, thereby delaying the rapid increase of reactive current. During the first-stage startup process, the copper loss is related to the current magnitude, and high-quality cold-rolled silicon steel sheets save copper loss to a certain extent. During the second-stage normal operation, the inflow of magnetic flux varies depending on the magnetic reluctance. Because the main silicon steel sheet 1114 itself is of higher quality, the inflow of magnetic flux is larger, so although the induced electromotive force of eddy currents and the hysteresis frictional heating are larger, the heat generation is also significantly reduced; the inflow of magnetic flux into the auxiliary silicon steel sheet 131 is smaller, and the induced electromotive force of eddy currents and the hysteresis frictional heating are also smaller, so the overall heat generation of the auxiliary silicon steel sheet 131 is also not large. In this way, the magnetic flux and losses borne by each type of silicon steel sheet are different according to their quality. Thus, by utilizing the differences in the magnetic circuits of the main silicon steel sheet 1114 and the auxiliary silicon steel sheet 131 in the two working stages, the advantages of the main silicon steel sheet 1114 and the auxiliary silicon steel sheet 131 are brought into play, the cost is reduced, and there is no excessive heat generation.

[0030] Reference Figures 1-2 As shown, in some embodiments, the dual magnetic circuit transformer includes a heat sink 30, and there are two heat sinks 30. The iron core 10 has a first wall and a second wall opposite to each other, and the two heat sinks 30 are disposed on the first wall and the second wall in a one-to-one correspondence.

[0031] For example, the heat sink 30 can be a cooling fan or a heat sink fin, etc.

[0032] In this embodiment, the heat sink 30 can dissipate heat, enhancing the heat dissipation capacity of the transformer and preventing local overheating.

[0033] Reference Figure 2 and Figures 4-5 As shown, in some embodiments, the dual magnetic circuit transformer includes support plates 40, which are in pairs. Each pair of support plates 40 is symmetrical about a defined axis. Each heat sink 30 is connected to the core 10 through a pair of support plates 40.

[0034] In this embodiment, the support plates 40 are symmetrically arranged to ensure that the heat sink 30 is installed stably.

[0035] Reference Figures 4-5 As shown, in some embodiments, each support plate 40 is provided with two first ear plates 41, and each first ear plate 41 is detachably connected to the corresponding heat sink 30.

[0036] For example, the first ear plate 41 can be detachably connected to the corresponding heat sink 30 by bolts or screws.

[0037] In this embodiment, the first ear plate 41 allows for quick assembly and disassembly between the heat sink 30 and the support plate 40, facilitating the replacement or repair of the heat sink 30.

[0038] Reference Figures 1-2 and Figure 6 As shown, in some embodiments, the dual magnetic circuit transformer includes a panel 50, there are two panels 50, the two panels 50 are symmetrical about a defined axis, the two panels 50 form a box, the core 10 and all windings 20 are located in the box, and the box has an opening through which each heat sink 30 can pass.

[0039] In this embodiment, the housing structure protects the internal components, and the opening design ensures effective heat exchange between the heat sink 30 and the external environment. This protects the core components of the transformer while ensuring efficient heat dissipation.

[0040] Reference Figure 1 As shown, in some embodiments, the dual magnetic circuit transformer includes a fixing assembly 60, and each support plate 40 is provided with a second ear plate 42 perpendicular to each first ear plate 41. Each second ear plate 42 is connected to the housing through the fixing assembly 60.

[0041] In this embodiment, the second ear plate 42 cooperates with the fixing component 60 to achieve a reliable connection between the housing and the support plate 40. This enhances the mechanical strength of the overall structure and prevents displacement caused by vibration or external forces.

[0042] Reference Figures 4-7 As shown, in some embodiments, the box body has a first stepped hole 51 for each fixing component 60. Each fixing component 60 includes a cylindrical body 61, a positioning sleeve 62, and a fastener 63. The cylindrical body 61 is disposed on the second ear plate 42, and a second stepped hole is provided inside the cylindrical body 61. One end of the positioning sleeve 62 passes through the first stepped hole 51 and is inserted into the first section of the second stepped hole. The flange of the positioning sleeve 62 abuts against the stepped surface of the first stepped hole 51. One end of the fastener 63 passes through the positioning sleeve 62 and is connected to the second section of the second stepped hole.

[0043] For example, fastener 63 can be a bolt, etc.

[0044] In this embodiment, the first stepped hole 51, in conjunction with the positioning sleeve 62, not only achieves precise positioning but also increases the contact area and provides final locking force through the fastener 63, ensuring a secure connection. This allows for quick and accurate installation, improving assembly efficiency.

[0045] Reference Figures 1-2 and Figure 8As shown, in some embodiments, the dual magnetic circuit transformer includes a heat dissipation box 70, and there are two heat dissipation boxes 70. The two heat dissipation boxes 70 are symmetrical about the defined axis. Each heat dissipation box 70 includes an air inlet pipe 71, a box body 72 and an exhaust pipe 73 arranged sequentially along the first direction F1. The box body 72 has multiple air outlet holes 7221 on the side facing the iron core 10.

[0046] In this embodiment, the air inlet pipe 71 is connected to an external air-cooling device, which delivers cool air to the heat dissipation box 70, ensuring that the air outlet 7221 is evenly distributed and that the airflow covers the entire surface of the iron core 10. This allows the heat dissipation box 70 to enhance heat dissipation through forced air cooling.

[0047] Reference Figure 8 As shown, in some embodiments, the housing 72 includes a distribution air channel 721, an exhaust air channel 722 and an air collection air channel 723 connected in sequence. There are multiple exhaust air channels 722, and each exhaust air channel 722 has multiple air outlet holes 7221 on the side facing the iron core 10.

[0048] In this embodiment, the multi-channel design ensures more uniform airflow distribution and avoids localized hot spots. Further optimization of heat dissipation efficiency ensures stable operation of the transformer in high-temperature environments.

[0049] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A dual-magnetic-circuit transformer, characterized in that, include: The iron core (10) has a plurality of columns spaced apart along a first direction (F1). The iron core (10) includes a first magnetic flux array (11), an insulating plate (12), and a second magnetic flux array (13) arranged sequentially along a second direction (F2). The first magnetic flux array (11) includes a plurality of main silicon steel sheets (1114) arranged sequentially along the second direction (F2), and the second magnetic flux array (13) includes a plurality of auxiliary silicon steel sheets (131) arranged sequentially along the second direction (F2). Multiple windings (20) are provided, the number of which is the same as the number of columns, and the windings (20) are wound one-to-one on the columns.

2. The dual magnetic circuit transformer according to claim 1, characterized in that, The main silicon steel sheet (1114) is a cold-rolled silicon steel sheet, and the auxiliary silicon steel sheet (131) is a cold-rolled silicon steel sheet or an amorphous alloy.

3. The dual magnetic circuit transformer according to claim 1, characterized in that, It includes heat sinks (30), there are two heat sinks (30), the iron core (10) has a first wall and a second wall opposite to each other, and the two heat sinks (30) are respectively disposed on the first wall and the second wall.

4. The dual magnetic circuit transformer according to claim 3, characterized in that, Includes support plates (40), which are in pairs. Each pair of support plates (40) is symmetrical about a defined axis. Each heat sink (30) is connected to the iron core (10) through a pair of support plates (40).

5. The dual magnetic circuit transformer according to claim 4, characterized in that, Each of the support plates (40) is provided with two first ear plates (41), and each first ear plate (41) is detachably connected to the corresponding heat sink (30).

6. The dual-magnetic-circuit transformer according to claim 5, characterized in that, Includes a panel (50), there are two panels (50), the two panels (50) are symmetrical about a defined axis, the two panels (50) form a box, the iron core (10) and all the windings (20) are located in the box, the box has an opening through which each heat sink (30) can pass.

7. The dual-magnetic-circuit transformer according to claim 6, characterized in that, Includes a fixing component (60), each of the support plates (40) is provided with a second ear plate (42) perpendicular to each of the first ear plates (41), and each second ear plate (42) is connected to the housing through the fixing component (60).

8. The dual magnetic circuit transformer according to claim 7, characterized in that, The box body has a first stepped hole (51) for each of the fixing components (60). Each fixing component (60) includes a cylindrical body (61), a positioning sleeve (62), and a fastener (63). The cylindrical body (61) is disposed on the second ear plate (42). A second stepped hole is provided in the cylindrical body (61). One end of the positioning sleeve (62) passes through the first stepped hole (51) and is inserted into the first section of the second stepped hole. The flange of the positioning sleeve (62) abuts against the step surface of the first stepped hole (51). One end of the fastener (63) passes through the positioning sleeve (62) and is connected to the second section of the second stepped hole.

9. The dual magnetic circuit transformer according to any one of claims 1 to 8, characterized in that, It includes a heat dissipation box (70), there are two heat dissipation boxes (70), the two heat dissipation boxes (70) are symmetrical about the defined axis, each heat dissipation box (70) includes an air inlet pipe (71), a box body (72) and an air outlet pipe (73) arranged sequentially along the first direction (F1), the box body (72) has multiple air outlet holes (7221) on the side facing the iron core (10).

10. The dual-magnetic-circuit transformer according to claim 9, characterized in that, The housing (72) includes a distribution air channel (721), an exhaust air channel (722) and an air collection air channel (723) connected in sequence. There are multiple exhaust air channels (722), and each exhaust air channel (722) has multiple air outlet holes (7221) on the side facing the iron core (10).

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