CN204155725U

CN204155725U - Common mode toroidal inductor

Info

Publication number: CN204155725U
Application number: CN201420630318.3U
Authority: CN
Inventors: 江明; 叶志雄
Original assignee: TAMURA CORP OF CHINA Ltd; Tamura Corp
Current assignee: TAMURA CORP OF CHINA Ltd; Tamura Corp
Priority date: 2014-10-28
Filing date: 2014-10-28
Publication date: 2015-02-11
Anticipated expiration: 2024-10-28

Abstract

The utility model relates to a kind of common mode toroidal inductor; comprise toroidal core and coil; this coil is by the coiling of multiply lenticular wire; and establish lenticular wire N stock; total number of turns M encloses; during coil number O, the scope of the central angle θ of arbitrary neighborhood lenticular wire turn-to-turn is as follows: 2*360 °/(M*N*O) >=θ >=0.5*360 °/(M*N*O).

Description

Common mode toroidal inductor

Technical field

The utility model relates to a kind of inductor, especially relates to a kind of common mode toroidal inductor.

Background technology

Fig. 1 is common mode annular inductor structure figure.Shown in figure 1, common mode toroidal inductor 10 comprises toroidal core 11 and coil 12.Coil 12 winding is on toroidal core 11.Fig. 2 is that known inductor stands around structure.Shown in figure 2, the coil 22 of known toroidal inductor adopts single lenticular wire to be wound on toroidal core 21, and each circle 22a of coil 22 is exactly a wire.Illustrate in Fig. 2 that N circle encloses to N+3 respectively.Although this technique makes coil overall volume large, the wire area of dissipation of reality is limited, and wire is more thick and stiff, is unfavorable for production and processing.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of common mode toroidal inductor, can improve wire area of dissipation.

The utility model is that to solve the problems of the technologies described above the technical scheme adopted be a kind of common mode toroidal inductor; comprise toroidal core and coil; it is characterized in that; this coil is by the coiling of multiply lenticular wire; and establish lenticular wire N stock; total number of turns M encloses, and during coil number O, the scope of the central angle θ of arbitrary neighborhood lenticular wire turn-to-turn is as follows: 2*360 °/(M*N*O) >=θ >=0.5*360 °/(M*N*O).

In an embodiment of the present utility model, this magnetic core is circular magnetic core.

In an embodiment of the present utility model, the quantity of this lenticular wire is 2 strands.

In an embodiment of the present utility model, the bearing of trend of this lenticular wire is along the radial direction of this magnetic core.

In an embodiment of the present utility model, the cross section of this lenticular wire is rectangle.

In an embodiment of the present utility model, the cross section of this lenticular wire comprises rectangular portion and special-shaped portion, this special-shaped portion has the first relative side and the second side, the minor face of this first side and this rectangular portion is adjacent, the width of this second side is less than the width of this first side, when this flat is wound on this magnetic core, this special-shaped part is in the ring of this magnetic core.

The utility model technique scheme propose multiply lenticular wire and around common mode toroidal inductor, can significantly improve wire area of dissipation, each conductor cross-section be reduced simultaneously, enhance productivity.

Accompanying drawing explanation

For above-mentioned purpose of the present utility model, feature and advantage can be become apparent, below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated, wherein:

Fig. 1 is common-mode inductor structure chart.

Fig. 2 is that known inductor stands around structure.

Fig. 3 is that the inductor of the utility model one embodiment is vertical around structure.

Fig. 4 is the central angle schematic diagram that the inductor of the utility model one embodiment stands around structure.

Fig. 5 A-5C is the lenticular wire shape of each embodiment of the utility model.

Embodiment

Fig. 3 is that the inductor of the utility model one embodiment is vertical around structure.Shown in figure 3, the common mode toroidal inductor 30 of the present embodiment, comprises toroidal core 31 and coil 32.The feature of the present embodiment is, coil 32 is by 2 bursts of lenticular wire coilings.N circle shown in Figure 3, N+1 circle, N+2 circle and N+3 circle.For N circle, it comprises 2 gangs of lenticular wire 32a and 32b.

And establish lenticular wire N stock, total number of turns M encloses, during coil number O, the scope of the central angle θ of arbitrary neighborhood lenticular wire turn-to-turn is as follows:

2*360 °/(M*N*O) >=θ >=0.5*360 °/(M*N*O) formula 1

At this, the definition of central angle is: the angle in the sectional view of lenticular wire between the AB line of lenticular wire and CD line, Fig. 4 is the central angle θ schematic diagram that the inductor of the utility model one embodiment stands around structure.

The advantage of Double-wire parallel wound structure embodiment illustrated in fig. 3 is, when the thickness of wire (the present embodiment is lenticular wire) is single line coiling 1/2, and the space that each circle line occupies is identical with sub-thread lenticular wire.Now, the area of dissipation of coil compares increase by 1 times with single line coiling, distributes more even.Simultaneously because the cross section of single lenticular wire becomes half, wire length-width ratio doubles, and product is easier to processing.

In embodiment of the present utility model, be use flat conductor line and not rounded line wire, lenticular wire is conducive to allowing wire occupy less space at circumferencial direction, thus can coiling more multi-turn.Shown in figure 3, in each circle, the bearing of trend A of lenticular wire is along the radial direction of this magnetic core.

As shown in Figure 3, in one embodiment, magnetic core 31 is can circular magnetic core.But be appreciated that magnetic core 31 also can be other annular shape.

In addition, although Fig. 3 illustrates that the quantity of lenticular wire is 2 strands, be appreciated that the quantity of lenticular wire also can more than 2 strands.

According to previous embodiment for an actual example: suppose lenticular wire 2 strands and around, 3 phase windings, every 4 circles mutually, now total number of turns is 12 circles, and being distributed to the mean circle-center angle θ often enclosed between adjacent lenticular wire is 15 °.According to formula 1, so central angle should in the scope between 7.5 ° to 30 °.

In an embodiment of the present utility model, the cross section of lenticular wire can be rectangle.

In another embodiment of the present utility model, the cross section of lenticular wire can slightly change.Fig. 5 A-5C is the flat shape of each embodiment of the utility model.Shown in figure 5A-5C, the cross section of lenticular wire comprises rectangular portion 51 and special-shaped portion 52.Abnormity portion 52 has the first relative side 52a and the second side 52b.Wherein, the minor face of the first side 52a and rectangular portion is adjacent, and the width w2 of the second side 52b is less than the width w1 of the first side 52a.When flat turns to coil 32 on magnetic core 31, special-shaped portion 52 is positioned at the ring of magnetic core 31, and the second side 52b points to the center of circle of magnetic core 31.The benefit of this design is the coil turn after can promoting assembling as much as possible.In fig. 5, the second side 52b in special-shaped portion 52 is with arc.In figure 5b, the second side 52b in special-shaped portion 52 is straight line, and whole special-shaped portion 52 is in trapezoidal.In figure 5 c, the second side 52b in special-shaped portion 52 with arc, and is smoothly transitted into the first side 52a, whole special-shaped portion 52 semicircular in shape.

The common mode toroidal inductor of the multiply Flat wire vertical winding that the utility model above-described embodiment proposes, can significantly improve wire area of dissipation, be reduced by each conductor cross-section simultaneously, enhance productivity.

Although the utility model discloses as above with preferred embodiment; so itself and be not used to limit the utility model; any those skilled in the art; not departing from spirit and scope of the present utility model; when doing a little amendment and perfect, therefore protection range of the present utility model is when being as the criterion of defining with claims.

Claims

1. a common mode toroidal inductor, comprises toroidal core and coil, it is characterized in that, this coil is by the coiling of multiply lenticular wire, and

If lenticular wire N stock, total number of turns M encloses, and during coil number O, the scope of the central angle θ of arbitrary neighborhood lenticular wire turn-to-turn is as follows:

2*360°/(M*N*O)≥θ≥0.5*360°/(M*N*O)。

2. common mode toroidal inductor as claimed in claim 1, it is characterized in that, this magnetic core is circular magnetic core.

3. common mode toroidal inductor as claimed in claim 1, it is characterized in that, the quantity of this lenticular wire is 2 strands.

4. common mode toroidal inductor as claimed in claim 1, is characterized in that, the bearing of trend of this lenticular wire is along the radial direction of this magnetic core.

5. common mode toroidal inductor as claimed in claim 1, it is characterized in that, the cross section of this lenticular wire is rectangle.

6. common mode toroidal inductor as claimed in claim 1; it is characterized in that; the cross section of this lenticular wire comprises rectangular portion and special-shaped portion; this special-shaped portion has the first relative side and the second side; the minor face of this first side and this rectangular portion is adjacent; the width of this second side is less than the width of this first side, and when this flat is wound on this magnetic core, this special-shaped part is in the ring of this magnetic core.