TWM569926U - Transformer with improved winding structure - Google Patents

Abstract

The invention discloses a transformer with an improved winding structure, comprising: a ring-shaped core, a primary winding and a primary winding; wherein the annular core is a core of a single magnetic circuit, and the annular core comprises mutually spaced juxtaposed a first leg and a second leg; the primary winding uses a copper wire around the outside of the first insulator of the first leg and the outside of the second insulator of the second leg; the secondary winding uses a copper strip, and the secondary winding includes a wrap around a first secondary winding of the first leg and a second secondary winding surrounding the second leg, the first secondary winding and the second secondary winding encircling the outer side of the copper wire of the primary winding; as the first secondary winding The two ends of the copper strip are folded 90 degrees and then extend along the same direction parallel to the axis of the first secondary winding to form the outlet end of the first secondary winding, and the ends of the copper strip as the second secondary winding are folded over. After 90 degrees, it extends along the same direction parallel to the axis of the second secondary winding to form the outlet end of the second secondary winding. The novel annular iron core has a single magnetic circuit structure, and has the advantages of miniaturization, good heat dissipation, reduced leakage inductance and improved efficiency.

Description

Transformer with improved winding structure

The present invention relates to a winding transformer, and more particularly to a transformer having an improved winding structure.

The transformer basically consists of two or more windings (or coils) that are placed on a closed core. The windings connected to the transformer and the power supply are called primary windings or primary windings, and the windings connected to the load are called secondary windings. Or secondary winding. The windings and windings and the windings and the core are insulated from each other. The iron core constitutes the magnetic circuit required for electromagnetic induction. In order to reduce the eddy current loss caused by the change of the magnetic flux, the core of the transformer is usually formed by stacking a plurality of sheets of silicon steel, and the adjacent two sheets of silicon steel are separated by an insulating varnish. Due to the high magnetic permeability of silicon steel sheets, most of the magnetic flux is confined to the core, so that the primary and secondary windings can achieve a relatively high degree of magnetic coupling.

The double E-core and the EI core are common core structures in conventional transformers. The primary and secondary windings are surrounded in the center of the core, and copper wires (usually enameled wires) are used in the primary and secondary windings. The winding method of the wire is usually to wind the primary winding and the secondary winding in the same core in a coaxial relationship, one of which is located in the inner ring and the other is located in the outer ring, and the insulating material is separated between the primary winding and the secondary winding. The transformer wound in this manner has a better coupling density between the primary winding and the secondary winding.

The double E-shaped iron core or the EI-type iron core used in the traditional transformer is a double-magnetic iron core, which is large in size and easily causes bilateral heat imbalance, and the primary winding of the copper wire is used. Both the group and the secondary winding are enclosed in an E-shaped core with poor heat dissipation and a small winding area.

The technical problem to be solved by the present invention is to provide a transformer having an improved winding structure.

In order to solve the above technical problem, an embodiment of the transformer with improved winding structure includes: a ring core, a primary winding and a primary winding; wherein the annular core is a single magnetic core. The annular core includes first and second legs juxtaposed with each other; the primary winding surrounds the outer side of the first insulating member of the first leg and the outer side of the second insulating member of the second leg using a copper wire; the secondary winding is used a copper strip, the secondary winding including a first secondary winding surrounding the first leg and a second secondary winding surrounding the second leg, the first secondary winding and the second secondary winding surrounding the copper wire of the primary winding The outer side; the two ends of the copper strip as the first secondary winding are folded 90 degrees and then extend along the same direction parallel to the axis of the first secondary winding to form the outlet end of the first secondary winding as the second secondary The two ends of the copper strip of the winding are folded by 90 degrees and then extended in the same direction parallel to the axis of the second secondary winding to form the outlet end of the second secondary winding.

A preferred structure of the transformer having the improved winding structure, wherein the outer side of the first leg has a first insulating member, the outer side of the second leg has a second insulating member, and the primary winding surrounds the first insulating member of the first leg The outer side of the outer side of the second insulating member of the second leg.

A preferred construction of the transformer of the present invention having an improved winding structure wherein the annular core is a rectangular annular member in which the first leg and the second leg are parallel to each other.

As a preferred structure of the transformer of the present invention having an improved winding structure, the annular core is a structure in which two L-shaped cores are butted to each other to form a ring.

As a preferred embodiment of the L-shaped iron core, two L-shaped iron cores are made of silicon steel sheet Stacked.

As a preferred embodiment of the L-shaped core, in each of the L-shaped cores, there are guiding bevels, and the guiding faces of the two L-shaped cores are closely butted together. Under the condition of the same sensitivity, it has the advantages of small gap, low leakage inductance and high efficiency.

The beneficial effect of the novel transformer with improved winding structure is that the annular iron core composed of two L-shaped iron cores has a single magnetic circuit structure, and has the advantage of miniaturization to avoid the problem of heat imbalance; the secondary winding is used. Copper has a large area to wrap around, has the advantage of good heat dissipation, and reduces the efficiency of leakage inductance. Under the same volume condition, the use of copper strip as the secondary winding can double the winding area.

The specific embodiments and other advantages and effects of the present invention will be described below in conjunction with the drawings.

10‧‧‧Ring core

11‧‧‧ first foot

12‧‧‧second foot

13‧‧‧First insulation

14‧‧‧Second insulation

20‧‧‧Primary winding

30‧‧‧Secondary winding

31‧‧‧First secondary winding

311‧‧‧ outlet

32‧‧‧second secondary winding

321‧‧‧ outlet

40A, 40B‧‧‧L core

L1‧‧‧Axis of the first secondary winding

L2‧‧‧Axis of the second secondary winding

S1, S2‧‧‧ guiding slope

Figure 1 is an exploded perspective view of one embodiment of a transformer of the present invention having an improved winding configuration.

Fig. 2 is a structural view showing an embodiment of a transformer of the present invention having an improved winding structure, showing the configuration in which the transformer combination is completed.

Fig. 3 is a plan view showing the structure of Fig. 2;

Fig. 4 is a cross-sectional view showing the structure of Fig. 3 at the A-A position.

Fig. 5 is a configuration diagram of an embodiment of the transformer of the present invention having an improved winding structure, showing the configuration in which the primary winding and the secondary winding are wound around the L-shaped core.

Fig. 6 is a bottom view structural view of Fig. 5.

Fig. 7 is a sectional view showing the structure of Fig. 6 at the position B-B.

Figure 8 is a configuration diagram of another embodiment of the L-shaped core of the transformer of the present invention having an improved winding structure.

The positional relationship described in the following embodiments includes upper, lower, left and right, and unless otherwise specified, is based on the direction indicated by the components in the drawing.

Referring to Figures 1 and 2, there is shown a structural exploded view and a structural view of an embodiment of the transformer of the present invention having an improved winding structure. An embodiment of the novel transformer having an improved winding structure includes an annular core 10, a primary winding 20, and a primary winding 30.

The annular core 10 is a core of a single magnetic circuit, and the annular core 10 includes a first leg 11 and a second leg 12 which are juxtaposed with each other. A preferred embodiment of the annular core 10 is a rectangular shape. An annular member in which the first leg 11 and the second leg 12 are parallel to each other. A preferred embodiment of the annular core 10 is a structure in which two L-shaped cores 40A and 40B are butted to each other in an annular shape, and the two L-shaped cores 40A and 40B are formed by laminating steel sheets.

Referring to FIG. 8, a preferred embodiment of the annular core 10 is shown. The two L-shaped cores 40A and 40B have inclined surfaces S1 and S2 at both ends, and two L-shaped cores. The guide slopes S1 and S2 of 40A and 40B are closely butted together. Under the condition of the same sensitivity, it has the advantages of small gap, low leakage inductance and high efficiency.

The primary winding 20 uses a copper wire which is an enamel wire having an insulating layer on the surface, the primary winding 20 surrounding the outside of the first leg 11 and the second leg 12; a preferred embodiment of the transformer having the improved winding structure of the present invention The outer side of the first leg 11 has a first insulating member 13 , and the outer side of the second leg 12 has a second insulating member 14 . The primary winding 20 surrounds the first leg 11 . The outer side of the first insulating member 13 and the outer side of the second insulating member 14 of the second leg 12 (see FIGS. 3 and 4). One embodiment of the first insulating member 13 and the second insulating member 14 is a plastic tube; in other embodiments, the first insulating member 13 and the second insulating member 14 may be a plastic film or a plastic paper.

The secondary winding 30 uses a copper strip, the surface of the copper strip has an insulating layer, the insulating layer may be an insulating varnish, a plastic film or a plastic paper, and the secondary winding 30 includes a first secondary winding 31 surrounding the first leg 11 and surrounding The second secondary winding 32 of the second leg 12, the first secondary winding 31 and the second secondary winding 32 surround the outer side of the copper wire of the primary winding 20, wherein both ends of the copper strip as the first secondary winding 31 After folding 90 degrees (see the folding manner indicated by the dotted arrow in FIG. 2), the outlet end 311 of the first secondary winding 31 is formed to extend along the same direction parallel to the axis L1 of the first secondary winding 31, as the first The two ends of the copper strip of the secondary winding 32 are folded by 90 degrees and then extended in the same direction parallel to the axis L2 of the second secondary winding 32 to constitute the outlet end 321 of the second secondary winding 32. The first secondary winding 31 and the second secondary winding 32 are selected according to the number of turns that the secondary winding 30 needs to surround, and the required number of copper strips are respectively wrapped around the outer side of the copper wire of the primary winding 20.

A preferred assembly method of the novel transformer having an improved winding structure is shown in Figures 5 to 7, wherein the primary winding 20 is first wrapped around the first leg 11 of the toroidal core 10 using copper wire (located in the L-shaped iron). The first insulating member 13 of the core 40A) is then wrapped around the second insulating member 14 of the second leg 12 of the annular core 10 (located in the L-shaped core 40B); and then the number of turns required to be wound according to the secondary winding 30 Selecting the required number of copper strips to complete the first secondary winding 31 and the second secondary winding 32 around the outer side of the copper wire of the primary winding 20; finally, the primary winding 20, the first secondary winding 31 and the surrounding The assembly of the novel transformer is completed by the two L-shaped cores 40A and 40B of the second secondary winding 32 being butted into each other to form a ring.

Although the present invention has been disclosed as above by the above embodiments, it is not intended to be limited. In the present invention, those skilled in the art can make a few changes and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of patent protection of the present invention is subject to the definition of the claims of the present application.

Claims (8)

A transformer having an improved winding structure, comprising: a ring-shaped core, a primary winding and a primary winding; the annular core is a core of a single magnetic circuit, the annular core comprising a first and a second a leg and a second leg; the primary winding surrounds the first leg and the second leg with a copper wire; the secondary winding uses a copper strip, and the secondary winding includes a first layer surrounding the first leg a secondary winding and a second secondary winding surrounding the second leg, the first secondary winding and the second secondary winding surrounding an outer side of the copper wire of the primary winding; as the first secondary winding The two ends of the copper strip are folded 90 degrees and then extend along the same direction parallel to the axis of the first secondary winding to form an outgoing end of the first secondary winding as the copper strip of the second secondary winding. After the two ends are folded by 90 degrees, they extend along the same direction parallel to the axis of the second secondary winding to form an outgoing end of the second secondary winding. A transformer having an improved winding structure according to claim 1, wherein the outer side of the first leg has a first insulating member, and the outer side of the second leg has a second insulating member; the primary winding is surrounded by An outer side of the first insulating member of the first leg and an outer side of the second insulating member of the second leg. A transformer having an improved winding structure according to claim 2, wherein the first insulating member and the second insulating member are plastic tubes, plastic films or plastic sheets. A transformer having an improved winding structure according to claim 1, wherein the copper wire of the primary winding is an enamel wire having an insulating layer on the surface, the surface of the copper tape has an insulating layer, and the insulating layer of the copper strip may be Insulating varnish, plastic film or plastic paper. A transformer having an improved winding structure according to claim 1, wherein the annular core is a rectangular annular member, and the first leg and the second leg are parallel to each other. A transformer having an improved winding structure according to claim 1, wherein the annular core is a structure in which two L-shaped cores are butted to each other to form a ring. A transformer having an improved winding structure according to claim 6, wherein the two L-shaped cores are laminated with a silicon steel sheet. A transformer having an improved winding structure according to claim 6, wherein each of the L-shaped cores has a guiding slope at both ends, and the guiding slopes of the two L-shaped cores are closely butted together.