Mutual inductor winding convenient to pour and mutual inductor
By designing the limit parts in the transformer winding, the problems of difficulty in fixing and poor pouring quality are solved, and a more stable pouring process and higher quality pouring effect are achieved.
Patent Information
- Application Number
- CN202421430308.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-21
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-06-21
AI Technical Summary
During the pouring process, existing transformer windings have problems such as difficulty in fixing before pouring and poor pouring quality.
A transformer winding including a limiting member is designed. The limiting member includes a fixed part and an abutment part. An angle is provided between the fixed part and the abutment part. The limiting member is placed at the inner circumference of the iron core at intervals. The fixed part is fixed with the coil, and the abutment part abuts the mold to form an effective support.
It reduces the difficulty of fixing before pouring, improves the position stability of the core and coil during pouring, and improves the pouring quality.
Smart Images
Figure CN222775118U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mutual inductors, in particular to a mutual inductor winding and a mutual inductor which are convenient for casting. Background Art
[0002] The transformer is an electrical device used for monitoring and protection in the circuit power system. It is divided into current transformer and voltage transformer according to the type of electrical signal; and is divided into high-current transformer, measuring transformer and zero-sequence protection transformer according to the strength of the secondary signal.
[0003] Regardless of the type of mutual inductor, its main structure includes a primary winding and a secondary winding. Among them, for the secondary winding, it is composed of an iron core and a coil wound on the iron core, which determines the type of secondary signal output. Therefore, ensuring the effective fixation of the coil on the iron core is crucial to ensuring the performance and stability of the mutual inductor. Specifically, in order to effectively fix the coil, the prior art will also place the coil in a mold after it is wound on the iron core to cast a layer of resin on the surface of the winding. In the process of pouring the resin layer, in order to ensure the coating of the resin layer, the winding needs to be limited so that it is suspended in the mold.
[0004] However, the inventors found that in order to achieve the suspension of the winding in the mold, the corresponding structure is set as follows: fixing the fixing piece or fixing plate on the outer peripheral wall of the winding, and fixing the fixing piece or fixing plate in the mold. At this time, since the winding is only fixed at one position on the outer peripheral wall, on the one hand, it is difficult to fix it before pouring; on the other hand, it also makes it impossible to ensure that the winding is in a static state during the pouring process, resulting in pouring quality problems. Utility Model Content
[0005] The utility model aims to provide a transformer winding and a transformer that are easy to cast, so as to improve the technical problems of great difficulty in fixing before casting and poor casting quality during winding casting caused by the winding fixing structure in the prior art.
[0006] In order to achieve the above purpose, the utility model proposes the following technical solutions:
[0007] In the first aspect, the technical solution provides a transformer winding that is easy to cast. It includes an iron core, a coil, a wrapping film and a plurality of stoppers that cooperate with each other; wherein the stoppers include a fixed portion and an abutting portion that are fixed to each other, and an angle is set between the fixed portion and the abutting portion;
[0008] The coil is wound on the iron core, and the limiting parts are arranged at intervals on the inner circumference of the iron core; wherein the fixing portion is adjacent to the coil located on the inner circumferential wall of the iron core, and is fixed to the adjacent coil by a wrapping film wound along the outer circumference of the iron core; the remaining end of the abutting portion abuts against the mold during the casting process.
[0009] Furthermore, the cross section of the limiting member is a T-shaped structure; wherein the transverse structure in the T-shaped structure forms the fixing portion, and the longitudinal structure in the T-shaped structure forms the abutting portion.
[0010] Furthermore, the cross section of the limiting member is an L-shaped structure; wherein two parts perpendicular to each other in the L-shaped structure respectively form the fixing portion and the abutting portion.
[0011] Furthermore, when the iron core is a ring-shaped iron core, the fixing portion is an arc-shaped structure; wherein the curvature of the fixing portion is consistent with the curvature of the ring-shaped iron core, and the fixing portion is arranged to fit the ring-shaped iron core.
[0012] Furthermore, when the iron core is a rectangular ring-shaped iron core, the fixing portion is a flat plate structure, and the fixing portion is arranged in close contact with the rectangular ring-shaped iron core.
[0013] Furthermore, the material of the limiting member is the same as the material of the casting material used for casting.
[0014] Furthermore, the free end of the abutting portion is a pointed structure, and point contact is achieved when abutting against the mold.
[0015] Furthermore, the wrapping film is industrial gauze.
[0016] Furthermore, the mold includes an outer shell and an inner convex portion which are fixed to each other; the inner convex portion is placed in the outer shell, and its outer structure is adapted to the shape of the iron core.
[0017] In a second aspect, the technical solution provides a mutual inductor, including the mutual inductor winding.
[0018] Beneficial effects:
[0019] The technical solution provides a transformer winding including a new casting fixing structure to improve the technical defects of the existing transformer winding in the casting process, that is, the difficulty in fixing before casting and the difficulty in ensuring the casting quality.
[0020] Specifically, the winding includes the following structure: including an iron core, a coil, a wrapping film and a number of stoppers that cooperate with each other; wherein the stopper includes a fixed portion and an abutting portion that are fixed to each other, and an angle is provided between the fixed portion and the abutting portion; the coil is wound on the iron core, and the stopper is spaced apart on the inner circumference of the iron core; wherein the fixed portion is adjacent to the coil located on the inner circumference of the iron core, and is fixed to the coil adjacent thereto through the wrapping film wound along the outer circumference of the iron core; the spare end of the abutting portion abuts against the mold during the casting process. At this time, during the casting process of the transformer winding, the several stoppers spaced apart on the inner circumference of the iron core will be fixed with the coil to form an integrated structure on the one hand, and will abut against the mold on the other hand, thereby forming an effective support between the coil and the mold. While reducing the difficulty of fixing, it also effectively improves the position stability of the iron core and the coil during the casting process, thereby improving the casting quality.
[0021] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, may be considered part of the inventive subject matter of the present disclosure, provided such concepts are not mutually inconsistent.
[0022] The foregoing and other aspects, embodiments and features of the present invention can be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as the features and / or beneficial effects of the exemplary embodiments, will be apparent from the following description or learned from the practice of the specific embodiments according to the teachings of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] The accompanying drawings are not intended to be drawn to scale. In the accompanying drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For the sake of clarity, not every component is labeled in each figure. Now, embodiments of various aspects of the utility model will be described by way of example and with reference to the accompanying drawings, in which:
[0024] Figure 1 A longitudinal cross-sectional view of the transformer winding that is easy to cast according to this embodiment during the casting process;
[0025] Figure 2 This is a transverse cross-sectional view of the transformer winding that is easy to cast according to this embodiment during the casting process;
[0026] Figure 3 This is a specific structural diagram of the limiting member described in this embodiment.
[0027] The reference numerals in the figure are: 1 is a mold, 2 is a coil, 3 is a limiter, 4 is a wrapping film; 11 is an outer shell, 12 is an inner convex part; 13 is a pouring port; 31 is a fixing part, and 32 is a limiter. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with general skills in the field to which the utility model belongs.
[0029] The words "first", "second" and similar words used in the specification and claims of the utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular form of "a", "an" or "the" and other similar words do not indicate a quantity limitation, but indicate the existence of at least one. "Include" or "comprise" and other similar words mean that the elements or objects appearing before "include" or "comprise" include the features, wholes, steps, operations, elements and / or components listed after "include" or "comprise", and do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0030] In the casting process of the transformer winding, in order to realize the suspension of the winding in the mold, the corresponding structure is set as follows: fixing the fixing part or the fixing plate on the outer peripheral wall of the winding, and fixing the fixing part or the fixing plate in the mold. At this time, since the winding is only fixed at one position on the outer peripheral wall, on the one hand, it is difficult to fix it before casting; on the other hand, it also leads to the inability to ensure that the winding is in a static state during the casting process, resulting in casting quality problems. Based on this, this embodiment aims to provide a transformer winding that is easy to cast to improve the above technical defects.
[0031] The transformer winding that is easy to cast disclosed in the utility model is further specifically introduced below in conjunction with the embodiments shown in the accompanying drawings.
[0032] Combination Figure 1 to Figure 2As shown, the winding includes an iron core, a coil 2, a wrapping film 4 and a plurality of stoppers 3 that cooperate with each other. Specifically, for the iron core, an insulating layer is wrapped on its outer peripheral wall. For the wrapping film 4, its material is industrial gauze. For the coil 2, its material is insulating enameled copper wire. For the stopper 3, it includes a fixed portion 31 and an abutting portion 32 that are fixed to each other, and an angle is also set between the fixed portion 31 and the abutting portion 32.
[0033] In terms of specific positional relationship, the coil 2 is wound on the iron core, and the stopper 3 is spaced apart on the inner circumference of the iron core. In terms of specific connection relationship, the fixing portion 31 is adjacent to the coil 2 located on the inner circumference of the iron core, and is fixed to the adjacent coil 2 through the wrapping film 4 wound along the outer circumference of the iron core; the free end of the abutting portion 32 abuts against the mold 1 during the casting process.
[0034] The mold 1 includes an outer shell 11, an inner convex portion 12, and a pouring port 13 provided on the outer shell 11. Specifically, the inner convex portion 12 is placed in the outer shell 11, and its outer shape and structure are adapted to the shape of the iron core. For example, if the iron core is a circular ring iron core, the inner convex portion 12 is cylindrical; if the iron core is a rectangular ring iron core, the inner convex portion 12 is a rectangular parallelepiped.
[0035] Based on this, in the specific implementation, first, the limiter 3 is spaced to the inner circumference of the core; then, the fixing portion 31 of each limiter 3 is fixed to the coil 2 at the corresponding position through the wrapping film 4, so as to achieve the fixation between the limiter 3 and the coil 2; secondly, after the coil and the core with the fixed limiter are sleeved on the inner convex portion 12 of the mold 1, the mold 1 is closed; finally, the casting material is filled into the mold cavity from the pouring port 13 reserved on the mold 1. At this time, during the casting of the transformer winding, the limiters 3 spaced to the inner circumference of the core will be fixed to the coil 2 to form an integrated structure on the one hand, and will abut against the mold 1 on the other hand, thereby forming an effective support between the coil 2 and the mold 1. While reducing the difficulty of fixing, it also effectively improves the position stability of the core and the coil 2 during the casting process, and improves the casting quality.
[0036] As a specific implementation method, Figure 3 As shown, the cross section of the stopper 3 is a T-shaped structure. At this time, the transverse structure in the T-shaped structure will form the fixing portion 11, and the longitudinal structure in the T-shaped structure will form the abutment portion 12.
[0037] As another specific implementation, the cross section of the position-limiting member 3 may also be an L-shaped structure. In this case, two mutually perpendicular parts of the L-shaped structure will form the fixing portion 11 and the abutting portion 12 respectively.
[0038] In the implementation process, in order to ensure the support effectiveness of the limiter 3, each limiter 3 is evenly spaced to the inner circumference of the core. Specifically, in this embodiment, there are three limiters 3, and the angle between adjacent limiters is 120 degrees.
[0039] In order to improve the stability between any of the fixing parts 11 and the coil 2, when the iron core is a circular ring-shaped iron core, the fixing part 11 is an arc-shaped structure; specifically, the curvature of the fixing part 11 is consistent with the curvature of the circular ring-shaped iron core, and the fixing part 11 is fitted with the circular ring-shaped iron core. Similarly, when the iron core is a rectangular ring-shaped iron core, the fixing part 11 is a flat plate structure, and the fixing part 11 is fitted with the rectangular ring-shaped iron core. At this time, the fixing part 11 and the coil 2 will ensure the stability of the relative position between the limiter 3 and the coil 2 through a fitting and fixing relationship.
[0040] Preferably, in order to reduce the structural influence of the stopper 3 on the casting layer, on the one hand, the material of the stopper 3 is the same as the material of the casting material used for casting. In this embodiment, the materials of the stopper 3 and the casting material are both resin. On the other hand, the free end of the abutting portion 12 is also set to a pointed structure, which is a point contact when abutting with the mold 1, thereby reducing the contact area between the two.
[0041] This embodiment also provides a mutual inductor, which includes the mutual inductor winding. In actual use, the mutual inductor also has the technical advantages of low fixing difficulty and good casting quality during the winding casting process, thereby improving the performance and stability of the mutual inductor.
[0042] Specifically, the mutual inductor described in this embodiment is a zero-sequence protection mutual inductor, which further includes a primary copper bar inserted along the axial direction of the iron core. The primary copper bar forms a primary signal input, the coil is a zero-sequence coil, and the spare end of the zero-sequence coil forms a secondary zero-sequence protection signal output.
[0043] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.
Claims
1. A transformer winding that is easy to cast, characterized in that: It includes an iron core, a coil, a wrapping film and a plurality of stoppers that cooperate with each other; wherein the stoppers include a fixed portion and an abutting portion that are fixed to each other, and an angle is provided between the fixed portion and the abutting portion; The coil is wound on the iron core, and the limiting parts are arranged at intervals on the inner circumference of the iron core; wherein the fixing portion is adjacent to the coil located on the inner circumferential wall of the iron core, and is fixed to the adjacent coil by a wrapping film wound along the outer circumference of the iron core; the remaining end of the abutting portion abuts against the mold during the casting process.
2. The transformer winding convenient for casting according to claim 1, characterized in that: The cross section of the limiting member is a T-shaped structure; wherein the transverse structure in the T-shaped structure forms the fixing portion, and the longitudinal structure in the T-shaped structure forms the abutting portion.
3. The transformer winding convenient for casting according to claim 1, characterized in that: The cross section of the position-limiting member is an L-shaped structure; wherein two parts of the L-shaped structure that are perpendicular to each other form the fixing portion and the abutting portion respectively.
4. The transformer winding convenient for casting according to claim 1, characterized in that: When the iron core is a circular ring-shaped iron core, the fixing portion is an arc-shaped structure; wherein the curvature of the fixing portion is consistent with the curvature of the circular ring-shaped iron core, and the fixing portion is arranged in close contact with the circular ring-shaped iron core.
5. The transformer winding convenient for casting according to claim 1, characterized in that: When the iron core is a rectangular ring-shaped iron core, the fixing portion is a flat plate structure, and the fixing portion is arranged in close contact with the rectangular ring-shaped iron core.
6. The transformer winding convenient for casting according to claim 1, characterized in that: The material of the position limiting member is the same as the material of the casting material used for casting.
7. The transformer winding convenient for casting according to claim 1, characterized in that: The free end of the abutting portion is a pointed structure, and point contact is achieved when abutting against the mold.
8. The transformer winding convenient for casting according to claim 1, characterized in that: The wrapping film is industrial gauze.
9. The transformer winding convenient for casting according to claim 1, characterized in that: The mold comprises an outer shell and an inner convex portion which are fixed to each other; the inner convex portion is placed in the outer shell, and its outer shape structure is adapted to the shape of the iron core.
10. A mutual inductor, characterized in that: The invention comprises the transformer winding as described in any one of claims 1 to 9.