JP3139944U - Transformer - Google Patents

Abstract

A small-volume transformer is provided.
A transformer includes a first core, a second core, a primary winding, a secondary winding, and a framework. The framework is installed between the first core and the second core. The framework includes a main body, and the main body includes a first surface 101, a second surface 102 facing the first surface, and a side surface 103 positioned between the first and second surfaces. The main body further includes a through-hole 104, a fixing portion 105, and a storage chamber 106. The through-hole penetrates the first surface and the second surface, and the fixing portion has the first surface and the second surface. The container chamber extends from the side to the inside of the main body. The secondary winding is fixed to the fixed portion, and the primary winding is inserted into the storage chamber.
[Selection] Figure 1

Description

  The present invention relates to a transformer, and more particularly to a planar transformer.

With the development of science and technology, portable electronic products such as notebook computers, mobile phones, MP3 players, and MP4 players, and home appliances are widely used. Transformers that are indispensable in electronic products are constantly developing due to the spread of electronic products.

  The function of the transformer is mainly energy transfer and voltage conversion. For example, AC and high-voltage streetcars normally used by transformers are converted into low-voltage DC power for portable electronic devices. The transformer is generally composed of elements such as a core, a winding, and a framework. Based on the difference between the core and the winding employed by the transformer, the transformer is generally divided into a known three-dimensional transformer and a planar transformer. Compared with a known three-dimensional transformer, a planar transformer has advantages such as a small volume, high efficiency, low leakage, and good heat dissipation.

  Planar transformers have many advantages compared to known three-dimensional transformers, but in existing planar transformers, a space between the core and the winding is maintained, and a safe creepage distance between the core and the winding is achieved. Since it is necessary to ensure, it is difficult to further reduce the volume of the planar transformer, which counters the trend of electronic products.

An object of the present invention is to provide a transformer having a small volume.

  The transformer of the present invention includes a first core, a second core, a primary winding, a secondary winding, and a framework. The framework is installed between the first core and the second core. The framework includes a main body, and the main body includes a first surface, a second surface facing the first surface, and a side surface located between the first and second surfaces. The main body further includes a through hole, a fixing portion, and a storage chamber. The through hole penetrates the first surface and the second surface, and the fixing portion is installed on the first surface and the second surface. The container chamber extends from the side to the inside of the main body. The secondary winding is fixed to the fixed portion, and the primary winding is inserted into the storage chamber.

  The above-described transformer has a fixed part and a storage chamber, the primary winding is inserted into the storage chamber of the framework, and the secondary winding is installed in the fixed part. The secondary winding is fixed and sufficiently isolated by the framework's own structure to achieve the insulation effect, reduce the spatial distance between the primary and secondary windings, and reduce the volume of the transformer To do.

  1 to 3 illustrate a transformer 100 according to a preferred embodiment of the present invention, in which a first core 12, a second core 14, a primary winding 16, a secondary winding 18, an insulating element 19, and a frame are illustrated. It consists of a workpiece 10. The framework 10 is installed between the first core 12 and the second core 14. The framework 10 includes a main body, and the main body includes a first surface 101, a second surface 102, a side surface 103, a through hole 104, a fixing portion 105, and a storage chamber 106. The first surface 101 and the second surface 102 are opposed to each other. The side surface 103 is located between the first surface 101 and the second surface 102. The through hole 04 penetrates the first surface 101 and the second surface 102. The fixing portion 105 is installed on the first surface 101 and the second surface 102. The storage chamber 106 extends from the side surface 103 to the inside of the main body. The secondary winding 18 is fixed to the fixing portion 105, and the primary winding 16 is inserted into the storage chamber 106.

  In this embodiment, the fixing portion 105 of the framework 10 main body is a concave tank formed on the first surface and the second surface, and the shape of the concave tank and the shape of the secondary winding 18 are matched. The shape of the through-hole 104 is substantially square. Further, the main body forms convex bases 107 at connecting portions of the first surface 101, the second surface 102, and the side surface 103, respectively.

  The first core 12 and the second core 14 are iron oxide cores. The middle part and both ends of the first core 12 each project a substantially E-shaped structure to one side. The second core 14 has a substantially flat rectangular shape.

  The primary winding 16 is a printed circuit board winding, and the secondary winding 18 is a copper foil winding, a printed circuit board winding, or a copper wire winding. The primary winding 16 is substantially square. The primary winding 16 has a second through-hole 161 installed in the middle part and a lead-out part 162 installed in the end part. The shape of the second through hole 161 is similar to the shape of the through hole 104. The lead-out portion 162 is used to connect with an external circuit (illustrated) and is designed in a terminal needle rivet format. The secondary winding 18 is formed by connecting two rectangular hollow flat plate portions (not shown), and the circuit lead-out portion is connected to the external circuit in the form of a terminal needle rivet or in the form of circuit board connection. (Not shown).

  The insulating element 19 is made of an insulating material, and is, for example, an insulating tape, an insulating piece, or insulating paper, and has an inverted U shape.

  During the assembly process, first, the primary winding 16 is inserted into the storage chamber 106 of the framework 10, and only the lead-out portion 162 is exposed in the primary winding 16. Thereafter, the secondary winding 18 is installed on the first surface 101 and the fixed portion 105 on the second surface 102 of the framework 10. Subsequently, the insulating elements 19 are respectively installed on the secondary winding 18 from both sides. The first core 12 passes through the through-hole 104 and the second through-hole 106 to fit with the second core 14, and finally, the transformer 100 is formed.

  The primary winding 16 of the transformer 100 described above is inserted into the storage chamber 106 of the framework 10, and the secondary winding 18 is a fixed portion on the first surface 101 and the second surface 102 of the framework 10. Thus, the primary winding 16 and the secondary winding 18 are fixed and sufficiently separated from each other by the structure of the framework 10 itself (in this embodiment, the primary winding 16 is the lead portion 162). Only the other part is covered by the framework 10), an insulating effect is achieved, the distance between the primary winding 16 and the secondary winding 18 can be reduced and the volume of the transformer 100 is reduced. Furthermore, the framework 10 forms convex bases 107 at the connecting positions of the first surface 101, the second surface 102, and the side surface 103, and the convex bases 107 are respectively formed with the primary winding 16 and the secondary winding 18 respectively. Between the primary winding 16 or the secondary winding 18 and the first core 12 or the second core 14, thereby increasing the outer isolation distance between the primary winding 16 and the secondary winding 14. The creepage distance between the windings 18 and between the primary winding 16 or the secondary winding 18 and the first core 12 or the second core 14 is increased to improve the safety of the transformer 100.

  From the above, in the transformer 100, the insulating element 19 is formed integrally with the framework 10. For example, the insulating element 19 is inverted L-shaped on the first surface 101 and the second surface 102 of the framework 10, respectively. A mold structure is formed, and the secondary winding 18 is isolated from the first core 12 and the second core 14. Further, when the insulating layer is directly formed by the secondary winding 18, the insulating element 19 can be omitted. Based on different output power, current, or voltage requirements, the secondary winding 18 has different layers. In addition, when the side wall of the concave tub of the fixing portion 105 becomes long or the depth of the concave tub is increased, the insulation isolation distance between the primary winding 16 and the secondary winding 18 can be further increased. it can.

FIG. 3 is an exploded view of a transformer according to a preferred embodiment of the present invention. It is the three-dimensional view after the assembly of the transformer of FIG. FIG. 3 is a top view of the transformer of FIG. 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Transformer 10 Framework 12 1st core 14 2nd core 16 Primary winding 18 Secondary winding 19 Insulation element 101 1st surface 102 2nd surface 103 Side surface 104 Through-hole 105 Fixing part 106 Storage chamber

Claims (9)

A transformer comprising a first core, a second core, a primary winding, a secondary winding, and a framework, wherein the framework is installed between the first core and the second core, The framework is composed of a main body, and the main body is composed of a first surface, a second surface opposite to the first surface, and a side surface located between the first and second surfaces. Furthermore, it has a through-hole, a fixing | fixed part, and a storage chamber, the said through-hole penetrates said 1st surface and said 2nd surface, and said fixing | fixed part is said 1st surface and said 2nd surface. The storage chamber is extended from the side surface into the main body, the secondary winding is fixed to the fixing portion, and the primary winding is inserted into the storage chamber. Transformer. The transformer according to claim 1, wherein the fixing part is a concave tank formed on the first surface and the second surface. The primary winding has a second through hole, and the middle portion and both ends of the first core project a substantially E-shaped structure to one side, and the middle portion of the first core passes through the framework. The transformer according to claim 1, wherein a hole and a second through hole of the primary winding are formed. The transformer according to claim 1, wherein the through hole communicates with the storage chamber. 2. The transformer according to claim 1, wherein the main body forms a convex base at each of the first surface, the second surface, and the side surface. The transformer according to claim 1, further comprising an insulating element installed on the secondary winding. 62. The transformer according to claim 61, wherein the insulating element is an insulating tape, an insulating piece, or insulating paper. The transformer according to claim 6, wherein the insulating element has an inverted U shape and is installed on the secondary winding. The first core and the second core are iron oxide cores, the primary winding is a printed circuit board winding, and the secondary winding is a copper foil winding, a printed circuit winding, or a copper wire winding. The transformer according to claim 1, wherein

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