Three-phase integrated voltage transformer

Abstract

The utility model relates to the technical field of voltage transformers, in particular to a three-phase integrated voltage transformer which comprises an iron core, an A-phase winding, a B-phase winding and a C-phase winding, the iron core comprises an A-phase core column, a B-phase core column, a C-phase core column and a closed-loop iron core body, and the A-phase core column, the B-phase core column and the C-phase core column are arranged in the iron core body at intervals in the length direction of the iron core body. One end of the A-phase core column, one end of the B-phase core column and one end of the C-phase core column are connected with the upper wall in the iron core body, the other end of the A-phase core column, the other end of the B-phase core column and the other end of the C-phase core column are connected with the lower wall in the iron core body, and the A-phase winding, the B-phase winding and the C-phase winding are wound on the A-phase core column, the B-phase core column and the C-phase core column respectively, so that the three-phase transformation assembly is integrated on one iron core; meanwhile, each phase winding cannot protrude out of the iron core in the vertical height direction of the iron core, so that the occupied space of the three-phase transformation assembly in the shell of the three-phase voltage transformer is reduced, and the size of the three-phase voltage transformer is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of voltage transformers, in particular to a three-phase integrated voltage transformer. Background Art

[0002] The three-phase voltage transformer is a type of voltage transformer, which is suitable for voltage measurement and power supply output of three-phase electricity. Among them, the three-phase voltage transformer includes a transformer component for reducing voltage, the transformer component includes a ring-shaped iron core and a winding wound on the iron core, and the winding includes a primary winding and a secondary winding, such as a standard voltage transformer, a manufacturing method and a combined standard voltage transformer disclosed in a Chinese patent (Announcement No.: CN115910559B).

[0003] In order to detect three-phase electricity, three transformer components are provided, such as a voltage transformer packaging shell and a voltage transformer disclosed in a Chinese patent (Announcement No.: CN203706841U).

[0004] In summary, the three transformer assemblies of the existing three-phase voltage transformer each use an iron core, and the windings in each transformer assembly cannot be integrated on one iron core. At the same time, the windings wound on the iron core not only protrude to the iron core in the horizontal width direction of the iron core, but also protrude outside the iron core in the vertical height direction of the iron core, resulting in the transformer assembly occupying a large space in the shell of the three-phase voltage transformer, resulting in an increase in the volume of the three-phase voltage transformer, which is not conducive to the miniaturization of the three-phase voltage transformer. Utility Model Content

[0005] One of the main purposes of the utility model is to provide a three-phase integrated voltage transformer, which aims to solve the technical problem that the existing three-phase voltage transformer cannot integrate the windings in each transformer component on one iron core, and the windings wound on the iron core not only protrude to the iron core in the horizontal width direction of the iron core, but also protrude outside the iron core in the vertical height direction of the iron core, resulting in the transformer component occupying a large space in the shell of the three-phase voltage transformer, resulting in an increase in the volume of the three-phase voltage transformer.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a three-phase integrated voltage mutual inductance, including a three-phase transformer assembly, the three-phase transformer assembly including an iron core, an A-phase winding, a B-phase winding and a C-phase winding, the iron core including an A-phase core column, a B-phase core column, a C-phase core column and a closed-loop iron core body, the A-phase core column, the B-phase core column and the C-phase core column are arranged in the iron core body at intervals along the length direction of the iron core body, one end of the A-phase core column, the B-phase core column and the C-phase core column is connected to the upper wall inside the iron core body, and the other end of the A-phase core column, the B-phase core column and the C-phase core column is connected to the lower wall inside the iron core body, and the A-phase winding, the B-phase winding and the C-phase winding are respectively wound on the A-phase core column, the B-phase core column and the C-phase core column.

[0007] Furthermore, the core body includes an upper iron yoke, a lower iron yoke, a left column and a right column, and the opposite ends of the upper iron yoke and the lower iron yoke are detachably connected through the left column and the right column to form the core body.

[0008] Furthermore, the structures of the A-phase core column, the B-phase core column and the C-phase core column are the same; wherein the A-phase core column, the B-phase core column and the C-phase core column are all formed by stacking a plurality of square silicon steel sheets along the width direction of the core body.

[0009] Furthermore, through holes are opened on the relative surfaces of each of the silicon steel sheets, and the through holes of the multiple silicon steel sheets of the A-phase core column, the B-phase core column and the C-phase core column are connected to each other in a one-to-one manner. The through holes of the multiple silicon steel sheets of the A-phase core column, the B-phase core column and the C-phase core column are penetrated by screws, and the opposite ends of the screws are threadedly connected with locking nuts.

[0010] Furthermore, a plurality of first mounting grooves are provided on the surface of the upper iron yoke facing the lower iron yoke, and the first mounting grooves extend along the length direction of the iron core body. The plurality of first mounting grooves correspond one-to-one to the plurality of silicon steel sheets in the A-phase core column, the B-phase core column, or the C-phase core column, and one end of the plurality of silicon steel sheets in the A-phase core column, the B-phase core column, and the C-phase core column are respectively plugged into the plurality of first mounting grooves.

[0011] Furthermore, a plurality of second mounting grooves are provided on the surface of the lower iron yoke facing the upper iron yoke, and the second mounting grooves extend along the length direction of the iron core body. The plurality of second mounting grooves correspond one-to-one to the plurality of first mounting grooves, and the other ends of the plurality of silicon steel sheets of the A-phase core column, the B-phase core column and the C-phase core column are respectively plugged into the plurality of second mounting grooves.

[0012] Furthermore, the left column is also formed by stacking multiple silicon steel sheets along the width direction of the core body, one end of the multiple silicon steel sheets of the left column are respectively plugged into the multiple first installation grooves, and the other end of the multiple silicon steel sheets of the left column are respectively plugged into the multiple second installation grooves.

[0013] Furthermore, the right column is also formed by stacking multiple silicon steel sheets along the width direction of the core body, one end of the multiple silicon steel sheets of the right column are respectively plugged into the multiple first installation grooves, and the other end of the multiple silicon steel sheets of the right column are respectively plugged into the multiple second installation grooves.

[0014] Furthermore, the A-phase winding, B-phase winding and C-phase winding each include a primary winding and a secondary winding, the primary winding and secondary winding of the A-phase winding are both wound on the A-phase core column, the primary winding and secondary winding of the B-phase winding are both wound on the B-phase core column, and the primary winding and secondary winding of the C-phase winding are both wound on the C-phase core column.

[0015] Furthermore, an insulating isolation layer is provided between the primary winding and the secondary winding.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model integrates the phase windings of the three-phase transformer assembly on one iron core by respectively winding the A-phase winding, the B-phase winding and the C-phase winding on the A-phase core column, the B-phase core column and the C-phase core column of the same iron core; at the same time, the A-phase winding, the B-phase winding and the C-phase winding are all located in a closed-loop iron core body, and in the case of windings with the same number of turns, the phase windings will only protrude out of the iron core in the horizontal width direction of the iron core, but will not protrude out of the iron core in the vertical height direction of the iron core, thereby reducing the space occupied by the three-phase transformer assembly in the shell of the three-phase voltage transformer and reducing the volume of the three-phase voltage transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the internal structure of the three-phase integrated voltage transformer of the utility model;

[0019] Figure 2 The embodiment relates to a schematic structural diagram of the connection between the A-phase winding and the A-phase core column;

[0020] Figure 3 The embodiment relates to a schematic structural diagram of a three-phase transformer assembly;

[0021] Figure 4 The embodiment relates to a schematic structural diagram of a plurality of square silicon steel sheets stacked;

[0022] Figure 5 The embodiment is a schematic diagram of the structure of the lower iron yoke;

[0023] Figure 6 The embodiment relates to a schematic structural diagram of an upper iron yoke;

[0024] Figure 7 The embodiment is a schematic diagram of the structure of a silicon steel sheet.

[0025] Reference numerals in the accompanying drawings:

[0026] 10. A-phase core column; 11. B-phase core column; 12. C-phase core column; 13. Left column; 14. Right column; 15. Upper iron yoke; 150. First mounting slot; 16. Lower iron yoke; 160. Second mounting slot; 2. A-phase winding; 201. A-phase primary winding; 202. A-phase secondary winding; 21. B-phase winding; 210. B-phase primary winding; 211. B-phase secondary winding; 22. C-phase winding; 220. C-phase primary winding; 221. C-phase secondary winding; 3. Screw; 31. Locking nut; 4. Silicon steel sheet; 5. Insulation isolation layer. DETAILED DESCRIPTION

[0027] 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.

[0028] In the description of the present invention, it should be understood that the terms "width", "up", "down", "front", "back", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature in which they are in contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] Please refer to Figure 1 - Figure 7 The utility model provides a three-phase integrated voltage transformer, including a three-phase transformer assembly, the three-phase transformer assembly including an iron core, an A-phase winding 2, a B-phase winding 21 and a C-phase winding 22. Figure 1 and Figure 3The iron core includes an A-phase core column 10, a B-phase core column 11, a C-phase core column 12 and a closed-loop iron core body. The iron core body can be a ring structure or a U-shaped structure; the A-phase core column 10, the B-phase core column 11 and the C-phase core column 12 are arranged in the iron core body at intervals along the length direction of the iron core body, one end of the A-phase core column 10, the B-phase core column 11 and the C-phase core column 12 is connected to the upper wall inside the iron core body, and the other end of the A-phase core column 10, the B-phase core column 11 and the C-phase core column 12 is connected to the lower wall inside the iron core body, and the A-phase winding 2, the B-phase winding 21 and the C-phase winding 22 are respectively wound on the A-phase core column 10, the B-phase core column 11 and the C-phase core column 12. It can be seen from this that the utility model integrates the phase windings of the three-phase transformer assembly on one core by respectively winding the A-phase winding 2, the B-phase winding 21 and the C-phase winding 22 on the A-phase core column 10, the B-phase core column 11 and the C-phase core column 12 of the same core; at the same time, the A-phase winding 2, the B-phase winding 21 and the C-phase winding 22 are all located in the closed-loop core body. In the case of the same number of turns of the windings, the phase windings will only protrude out of the core in the horizontal width direction of the core, and will not protrude out of the core in the vertical height direction of the core, thereby reducing the space occupied by the three-phase transformer assembly in the shell of the three-phase voltage transformer, and further reducing the volume of the three-phase voltage transformer.

[0032] In this embodiment, refer to Figure 3 The core body includes an upper iron yoke 15, a lower iron yoke 16, a left column 13 and a right column 14, and the opposite ends of the upper iron yoke 15 and the lower iron yoke 16 are detachably connected through the left column 13 and the right column 14 to form a closed-loop core body. Since one end of the A-phase core column 10, the B-phase core column 11 and the C-phase core column 12 are connected to the upper wall in the core body, and the other end of the A-phase core column 10, the B-phase core column 11 and the C-phase core column 12 are connected to the lower wall in the core body, the core can form a closed magnetic circuit. That is, the upper iron yoke 15, the lower iron yoke 16, the left column 13 and the right column 14 mainly play the role of connecting the magnetic circuit. In addition, the left column 13, the right column 14, the A-phase core column 10, the B-phase core column 11 and the C-phase core column 12 make the voltage transformer have five columns, forming a three-phase five-column voltage transformer.

[0033] In this embodiment, the structures of the A-phase core column 10, the B-phase core column 11 and the C-phase core column are the same; Figure 4 , the A-phase core column 10 is formed by stacking multiple square silicon steel sheets 4 along the width direction of the core body. Therefore, the B-phase core column 11 and the C-phase core column 12 are also formed by stacking multiple square silicon steel sheets 4 along the width direction of the core body. That is, the silicon steel sheets 4 of the A-phase core column 10, the B-phase core column 11, and the C-phase core column 12 are all square thin sheet structures; the number of multiple silicon steel sheets 4 of the A-phase core column 10, the multiple silicon steel sheets 4 of the B-phase core column 11, and the multiple silicon steel sheets 4 of the C-phase core column 12 is the same.

[0034] In this embodiment, through holes (not shown) are provided on the relative surfaces of each silicon steel sheet 4, that is, the through holes on each silicon steel sheet 4 penetrate the relative surfaces of each silicon steel sheet 4. Of course, the through holes of the multiple silicon steel sheets 4 of the A-phase core column 10 are connected one by one, the through holes of the multiple silicon steel sheets 4 of the B-phase core column 11 are connected one by one, and the through holes of the multiple silicon steel sheets 4 of the C-phase core column 12 are connected one by one. Figure 4 For the A-phase core column 10, the through holes of the multiple silicon steel sheets 4 of the A-phase core column 10 are penetrated by the screw rod 3, and the opposite ends of the screw rod 3 are threadedly connected with locking nuts 31. The locking nuts 31 are threadedly connected with the screw 3 to lock the multiple silicon steel sheets 4 of the A-phase core column 10, so that the multiple silicon steel sheets 4 of the A-phase core column 10 are stacked tightly.

[0035] Similarly, for the B-phase core column 11, the through holes of the multiple silicon steel sheets 4 of the B-phase core column 11 are also penetrated by the screw rod 3, and the opposite ends of the screw rod 3 are threadedly connected with locking nuts, and the multiple silicon steel sheets 4 of the B-phase core column 11 are threadedly connected and locked by the locking nut 31 and the screw 3, so that the multiple silicon steel sheets 4 of the B-phase core column 11 are stacked tightly. For the C-phase core column 12, the through holes of the multiple silicon steel sheets 4 of the C-phase core column are also penetrated by the screw rod 3, and the opposite ends of the screw rod 3 are threadedly connected with locking nuts, and the multiple silicon steel sheets 4 of the C-phase core column 12 are threadedly connected and locked by the locking nut 31 and the screw 3, so that the multiple silicon steel sheets 4 of the C-phase core column 12 are stacked tightly.

[0036] In this embodiment, the left column 13 is also formed by stacking multiple silicon steel sheets 4 along the width direction of the core body, and one end of the multiple silicon steel sheets 4 of the left column 13 is respectively plugged into the multiple first mounting grooves 150, and the other end of the multiple silicon steel sheets 4 of the left column 13 is respectively plugged into the multiple second mounting grooves 160, so that the core body can be easily disassembled. Similarly, the right column 14 is also formed by stacking multiple silicon steel sheets 4 along the width direction of the core body, and one end of the multiple silicon steel sheets 4 of the right column 14 is respectively plugged into the multiple first mounting grooves 150, and the other end of the multiple silicon steel sheets 4 of the right column 14 is respectively plugged into the multiple second mounting grooves 160, so that the core body can be further easily disassembled.

[0037] In this embodiment, refer to Figure 3 , Figure 5 and Figure 6A plurality of first mounting grooves 150 are provided on the surface of the upper iron yoke 15 facing the lower iron yoke 16, and the first mounting grooves 150 extend along the length direction of the iron core body. The plurality of first mounting grooves 150 correspond one-to-one to the plurality of silicon steel sheets 4 in the A-phase core column 10 or the B-phase core column 11 or the C-phase core column 12, and one end of the plurality of silicon steel sheets 4 in the A-phase core column 10, the B-phase core column 11 and the C-phase core column 12 are respectively plugged into the plurality of first mounting grooves 150, so that one end of the A-phase core column 10, the B-phase core column 11 and the C-phase core column 12 are detachably connected to the upper iron yoke 15, thereby facilitating the disassembly of the iron core body and facilitating maintenance.

[0038] Similarly, a plurality of second mounting grooves 160 are provided on the surface of the lower iron yoke 16 facing the upper iron yoke 15, and the second mounting grooves 160 extend along the length direction of the iron core body. The plurality of second mounting grooves 160 correspond one-to-one to the plurality of first mounting grooves 150, and the other ends of the plurality of silicon steel sheets 4 of the A-phase core column 10, the B-phase core column 11 and the C-phase core column 12 are respectively plugged into the plurality of second mounting grooves 160, so that the other ends of the A-phase core column 10, the B-phase core column 11 and the C-phase core column 12 are detachably connected to the lower iron yoke 16.

[0039] In summary, it can be seen that the opposite ends of the A-phase core column 10 are detachably connected to the upper iron yoke 15 and the lower iron yoke 16 by plugging, which is convenient for repairing and replacing the A-phase core column 10; the opposite ends of the B-phase core column 11 are detachably connected to the upper iron yoke 15 and the lower iron yoke 16 by plugging, which is convenient for repairing and replacing the B-phase core column 11; the opposite ends of the C-phase core column 12 are detachably connected to the upper iron yoke 15 and the lower iron yoke 16 by plugging, which is convenient for repairing and replacing the C-phase core column 12.

[0040] It should be noted that the plug-in fit between the silicon steel sheet 4 and the first installation groove 150 adopts a transition fit, and the plug-in fit between the silicon steel sheet 4 and the second installation groove 160 adopts a transition fit.

[0041] In this embodiment, the A-phase winding 2, the B-phase winding 21 and the C-phase winding 22 each include a primary winding and a secondary winding, that is, Figure 1As shown, the primary winding of the A-phase winding 2 is the A-phase primary winding 201, and the secondary winding of the A-phase winding 2 is the A-phase secondary winding 202; the primary winding of the B-phase winding 21 is the B-phase primary winding 210, and the secondary winding of the B-phase winding 21 is the B-phase secondary winding 211; the primary winding of the C-phase winding 22 is the C-phase primary winding 220, and the secondary winding of the C-phase winding 22 is the C-phase secondary winding 221. Of course, the A-phase primary winding 201 and the A-phase secondary winding 202 are both wound on the A-phase core column 10; the B-phase primary winding 210 and the secondary winding of the B-phase winding 21 are both wound on the B-phase core column 11, and the C-phase primary winding 220 and the C-phase secondary winding 221 of the C-phase are both wound on the C-phase core column 12. In addition, an insulating isolation layer 5 is provided between the primary winding and the secondary winding of each phase winding, thereby achieving the insulation effect between the primary winding and the secondary winding of each phase winding.

[0042] It should be noted that the connection between the primary winding, the secondary winding and the core column of the iron core belongs to the relatively mature existing technology in the field of voltage transformers. For example, the coil of the primary winding is wound on an insulating frame, which is not described in detail in this embodiment.

[0043] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A three-phase integrated voltage transformer, comprising a three-phase transformer assembly, wherein the three-phase transformer assembly comprises an iron core, an A-phase winding, a B-phase winding and a C-phase winding, characterized in that: The iron core includes an A-phase core column, a B-phase core column, a C-phase core column and a closed-loop iron core body. The A-phase core column, the B-phase core column and the C-phase core column are arranged in the iron core body at intervals along the length direction of the iron core body. One end of the A-phase core column, the B-phase core column and the C-phase core column is connected to the upper wall inside the iron core body, and the other end of the A-phase core column, the B-phase core column and the C-phase core column is connected to the lower wall inside the iron core body. The A-phase winding, the B-phase winding and the C-phase winding are respectively wound on the A-phase core column, the B-phase core column and the C-phase core column.

2. The three-phase voltage transformer according to claim 1, characterized in that: The core body comprises an upper iron yoke, a lower iron yoke, a left column and a right column. The opposite ends of the upper iron yoke and the lower iron yoke are detachably connected through the left column and the right column to form the core body.

3. The three-phase voltage transformer according to claim 2, characterized in that: The A-phase core column, the B-phase core column and the C-phase core column have the same structure; wherein the A-phase core column, the B-phase core column and the C-phase core column are all formed by stacking a plurality of square silicon steel sheets along the width direction of the core body.

4. The three-phase voltage transformer according to claim 3, characterized in that: Through holes are opened on the relative surfaces of each of the silicon steel sheets, and the through holes of the multiple silicon steel sheets of the A-phase core column, the B-phase core column and the C-phase core column are connected to each other in a one-to-one manner. The through holes of the multiple silicon steel sheets of the A-phase core column, the B-phase core column and the C-phase core column are penetrated by screws, and the opposite ends of the screws are threadedly connected with locking nuts.

5. The three-phase voltage transformer according to claim 3, characterized in that: A plurality of first mounting grooves are provided on the surface of the upper iron yoke facing the lower iron yoke, and the first mounting grooves extend along the length direction of the iron core body. The plurality of first mounting grooves correspond one-to-one to the plurality of silicon steel sheets in the A-phase core column, the B-phase core column, or the C-phase core column, and one end of the plurality of silicon steel sheets in the A-phase core column, the B-phase core column, and the C-phase core column are respectively plugged into the plurality of first mounting grooves.

6. The three-phase voltage transformer according to claim 5, characterized in that: A plurality of second mounting grooves are provided on the surface of the lower iron yoke facing the upper iron yoke, and the second mounting grooves extend along the length direction of the iron core body. The plurality of second mounting grooves correspond one-to-one to the plurality of first mounting grooves, and the other ends of the plurality of silicon steel sheets of the A-phase core column, the B-phase core column and the C-phase core column are respectively plugged into the plurality of second mounting grooves.

7. The three-phase voltage transformer according to claim 6, characterized in that: The left column is also formed by stacking multiple silicon steel sheets along the width direction of the core body, one end of the multiple silicon steel sheets of the left column are respectively plugged into the multiple first installation grooves, and the other end of the multiple silicon steel sheets of the left column are respectively plugged into the multiple second installation grooves.

8. The three-phase voltage transformer according to claim 6, characterized in that: The right column is also formed by stacking multiple silicon steel sheets along the width direction of the core body, one end of the multiple silicon steel sheets of the right column are respectively plugged into the multiple first installation grooves, and the other end of the multiple silicon steel sheets of the right column are respectively plugged into the multiple second installation grooves.

9. The three-phase voltage transformer according to claim 1, characterized in that: The A-phase winding, B-phase winding and C-phase winding each include a primary winding and a secondary winding. The primary winding and secondary winding of the A-phase winding are both wound on the A-phase core column, the primary winding and secondary winding of the B-phase winding are both wound on the B-phase core column, and the primary winding and secondary winding of the C-phase winding are both wound on the C-phase core column.

10. The three-phase voltage transformer according to claim 9, characterized in that: An insulating isolation layer is provided between the primary winding and the secondary winding.

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