Annular transformer with built-in inductor

Abstract

The utility model discloses an annular transformer with a built-in inductor. The annular transformer comprises a hollow annular iron core, the primary coil assembly is wound on the iron core; the inductance magnetic ring is arranged on the primary coil assembly in an insulating manner; the secondary coil assembly is sequentially wound on the iron core, the primary coil assembly and the inductance magnetic ring and is in insulated contact connection with the primary coil assembly; the supporting column is fixedly arranged in the hollow cavity of the iron core; and the fixing mechanism is detachably and fixedly connected with the supporting column. According to the annular transformer, the inductance magnetic ring is arranged between the primary coil assembly and the secondary coil assembly, so that the problems that an existing annular transformer externally connected with an inductor is not attractive and inconvenient to install are effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a toroidal transformer with built-in inductance. Background Technology

[0002] Toroidal transformers are a major type of transformer, widely used in household appliances and other technically demanding electronic devices. Their primary applications are as power transformers and isolation transformers. Toroidal transformers used in inverters typically incorporate an inductor. The inductor improves current characteristics, filters, increases conversion efficiency, and enhances protection circuitry, thereby improving the overall performance and reliability of the inverter. Currently, the conventional approach for toroidal transformers in inverters is to use an external inductor, which is connected in series with the secondary leads. This external inductor makes the toroidal transformer aesthetically unappealing, inconvenient to install, and requires manual inductor winding, resulting in higher costs. Therefore, a toroidal transformer with an internal inductor is proposed to address these issues. Summary of the Invention

[0003] One of the objectives of this invention is to provide a toroidal transformer with built-in inductor, so as to solve the problems of unsightly appearance and inconvenient installation of existing toroidal transformers with external inductor.

[0004] The toroidal transformer with built-in inductor of this utility model can be achieved through the following technical solutions:

[0005] This utility model discloses a toroidal transformer with built-in inductor used in an inverter. It includes a hollow toroidal core; a primary coil assembly wound around the core; an inductor ring disposed on the primary coil assembly and insulated from it; a secondary coil assembly wound sequentially around the core, the primary coil assembly, and the inductor ring, with the secondary coil assembly insulated from the primary coil assembly; a support column fixedly disposed within the hollow cavity of the core; and a fixing mechanism detachably fixedly connected to the support column.

[0006] In one embodiment, the primary coil assembly includes a primary coil body wound around the iron core and a first insulating layer covering the primary coil body.

[0007] In one embodiment, the inductor ring is made of iron-silicon-aluminum.

[0008] In one embodiment, an annular first flexible pad is provided between the inductor ring and the primary coil assembly.

[0009] In one embodiment, the first flexible pad is made of silicone.

[0010] In one embodiment, the secondary coil assembly includes a secondary coil body and a second insulating layer; the secondary coil body is sequentially wound around the iron core, the primary coil assembly, and the inductor ring; the second insulating layer covers the secondary coil body.

[0011] In one embodiment, the support column is made of epoxy resin.

[0012] In one embodiment, the fixing mechanism includes a fixing plate, which is fixedly connected to the support column via a connector.

[0013] In one embodiment, a second flexible pad is provided at the connection between the fixing plate and the support column; the second flexible pad is made of sponge or silicone.

[0014] In one embodiment, the connector includes a screw that passes through the fixing plate and the support column in sequence; and a fastening nut disposed on the support column and detachably threadedly connected to the screw.

[0015] Compared with the prior art, the beneficial effects of this utility model of a toroidal transformer with built-in inductor are as follows:

[0016] This utility model discloses a toroidal transformer with a built-in inductor. By embedding an inductor ring between the primary and secondary coil assemblies, it achieves the same electrical properties as a toroidal transformer with an external inductor. The secondary coil assembly has only two leads, eliminating the need for an external inductor in series, resulting in a more aesthetically pleasing appearance and easier wiring. This effectively solves the problems of unsightly and inconvenient installation associated with existing toroidal transformers with external inductors. Since the built-in inductor ring is wound together with the secondary coil assembly, it saves on the work of adding an external inductor, thus improving the production efficiency of the toroidal transformer to some extent. Furthermore, the fixing method, which uses epoxy resin filling in the middle of the iron core, effectively reduces or avoids the risk of the fixing plate damaging the inductor ring during installation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a toroidal transformer with built-in inductor according to the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of a toroidal transformer with built-in inductor according to another perspective of this utility model;

[0020] Figure 3 This is a longitudinal cross-sectional schematic diagram of a toroidal transformer with built-in inductor according to the present invention;

[0021] Figure 4 This is an exploded structural diagram of a toroidal transformer with built-in inductor according to this utility model.

[0022] The diagram shows: 10, toroidal transformer; 11, iron core; 12, primary coil assembly; 121, primary coil body; 122, first insulation layer; 13, inductor ring; 131, first flexible pad; 14, secondary coil assembly; 141, secondary coil body; 142, second insulation layer; 15, support column; 16, fixing mechanism; 161, fixing plate; 1611, fixing hole; 1612, second flexible pad; 162, connector; 1621, screw; 1622, fastening nut. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0025] Please see Figures 1-4As shown, the toroidal transformer 10 with built-in inductor of this utility model is mainly used in inverters. It includes an iron core 11, a primary coil assembly 12, an inductor ring 13, a secondary coil assembly 14, a support column 15, and a fixing mechanism 16. The iron core 11 is a hollow toroidal shape. The primary coil assembly 12 is wound around the iron core 11. The inductor ring 13 is disposed on the primary coil assembly 12 and is insulated from and connected to the primary coil assembly 12. The secondary coil assembly 14 is wound sequentially around the iron core 11, the primary coil assembly 12, and the inductor ring 13, and is insulated from and connected to the primary coil assembly 12. The support column 15 is fixedly disposed in the hollow cavity of the iron core 11. The fixing mechanism 16 is detachably fixedly connected to the support column 15, and the fixing mechanism 16 facilitates the fixing and installation of the toroidal transformer 10.

[0026] Please see Figures 1-4 As shown, in this embodiment, the primary coil assembly 12 includes a primary coil body 121 and a first insulating layer 122; the primary coil body 121 is wound around the iron core 11; the first insulating layer 122 covers the primary coil body 121, and the primary coil body 121 is insulated by the first insulating layer 122. In this embodiment, the inductor ring 13 is made of iron-silicon-aluminum alloy. Since the AL value of the iron-silicon-aluminum alloy ring is relatively stable, its leakage inductance can be accurately controlled. Specifically, in order to prevent the inductor ring 13 from being crushed when the secondary coil assembly 14 is wound, an annular first flexible pad 131 is provided between the inductor ring 13 and the first insulating layer 122. Preferably, the first flexible pad 131 is made of silicone.

[0027] Please see Figures 1-4 As shown, in this embodiment, the secondary coil assembly 14 includes a secondary coil body 141 and a second insulating layer 142. The secondary coil body 141 is sequentially wound around the iron core 11, the primary coil assembly 12, and the inductor ring 13. The second insulating layer 142 covers the secondary coil body 141, and the secondary coil body 141 is insulated by the second insulating layer 142. In this embodiment, the support column 15 is made of epoxy resin. Specifically, after the primary coil assembly 12, the inductor ring 13, and the secondary coil assembly 14 are sequentially disposed on the iron core 11, epoxy resin is injected into the hollow cavity of the iron core 11 to form the support column 15.

[0028] Please see Figures 1-4As shown, in this embodiment, the fixing mechanism 16 includes a fixing plate 161 and a connector 162. The fixing plate 161 is fixedly connected to the support column 15 through the connector 162, and the fixing plate 161 facilitates the fixing and installation of the toroidal transformer 10 onto the inverter. Specifically, the fixing plate 161 has multiple fixing holes 1611 through it, and the fixing plate 161 is fixedly installed onto the inverter through the multiple fixing holes 1611. A second flexible pad 1612 is provided at the connection between the fixing plate 161 and the support column 15, so that the rigid contact connection between the fixing plate 161 and the support column 15 is converted into a flexible contact connection. Preferably, the material of the second flexible pad 1612 is a sponge pad or a silicone pad. Specifically, the connector 162 includes a screw 1621 and a fastening nut 1622; the screw 1621 passes through the fixing plate 161, the second flexible pad 1612 and the support column 15 in sequence; the fastening nut 1622 is located above the support column 15 and is detachably threaded to the screw 1621. Through the cooperation of the screw 1621 and the fastening nut 1622, the fixing plate 161 and the support column 15 are fixedly connected.

[0029] It should be noted that the specific production process of the toroidal transformer 10 with built-in inductor of this utility model is as follows: First, a primary coil body 121 is wound around the toroidal iron core 11. Then, a first insulating layer 122 is covered on the wound primary coil body 121 to insulate the primary coil body 121 and the inductor ring 13. Next, a toroidal first flexible pad 131 and the inductor ring 13 are placed sequentially on the first insulating layer 122. Then, a secondary coil body 141 is wound around the inductor ring 13. Next, a second insulating layer 142 is covered on the secondary coil body 141 to insulate the secondary coil body 141. Then, epoxy resin is injected into the hollow cavity of the iron core 11 with the primary coil assembly 12, the inductor ring 13, and the secondary coil assembly 14 to form a support column 15. Finally, the fixing mechanism 16 is fixedly connected to the support column 15, thereby completing the production and assembly operation of the entire toroidal transformer 10.

[0030] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0031] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A ring transformer with built-in inductance applied to an inverter, characterized by, The application relates to an inductor, which comprises the following parts: an iron core in a hollow ring shape; a primary coil assembly wound on the iron core; an inductive magnetic ring in contact with the primary coil assembly; a secondary coil assembly wound on the iron core, the primary coil assembly and the inductive magnetic ring in sequence, and in contact with the primary coil assembly; a supporting column fixed in the hollow cavity of the iron core; a fixing mechanism in detachable connection with the supporting column.

2. A toroidal transformer with a built-in inductor according to claim 1, characterized in that, The primary coil assembly comprises a primary coil body wound on the iron core and a first insulating layer covering the primary coil body.

3. A toroidal transformer with a built-in inductor according to claim 1, characterized in that, The inductive magnetic ring is made of iron-silicon-aluminum.

4. A toroidal transformer with a built-in inductor according to claim 3, characterized in that A first flexible pad is arranged between the inductive magnetic ring and the primary coil assembly.

5. A toroidal transformer with a built-in inductor according to claim 4, characterized in that The first flexible pad is made of silica gel.

6. A toroidal transformer with a built-in inductor according to claim 1, characterized in that, The secondary coil assembly comprises a secondary coil body and a second insulating layer, the secondary coil body being wound on the iron core, the primary coil assembly and the inductive magnetic ring in sequence, and the second insulating layer covering the secondary coil body.

7. A toroidal transformer with a built-in inductor according to claim 1, characterized in that, The supporting column is made of epoxy resin.

8. A toroidal transformer with a built-in inductance according to any one of claims 1-7, characterized in that, The fixing mechanism comprises a fixing plate in fixed connection with the supporting column through a connecting piece.

9. A toroidal transformer with a built-in inductor according to claim 8, characterized in that, A second flexible pad is arranged at the connecting position of the fixing plate and the supporting column, and the second flexible pad is made of sponge or silica gel.

10. A toroidal transformer with a built-in inductor according to claim 8, characterized in that, The connecting piece comprises a screw rod penetrating the fixing plate and the supporting column in sequence, and a fastening nut in detachable screw connection with the screw rod.

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