TWI739665B - Coil device - Google Patents

Abstract

A coil device includes a core, a transformer winding, and a filter winding. The core body includes a first core body part and a second core body part connected with the same body. The transformer winding is wound on the first core part and includes a first wire and a second wire. The filter winding is wound on the second core part. Through the design that the transformer winding and the filter winding are respectively wound on the first core part and the second core part of the core, the transformer and filter functions can be realized on a single core at the same time, thereby saving circuit layout It also reduces the size of electronic products.

Description

Coil device

The present invention relates to an electronic device, in particular to a device with filtering and voltage transformation functions.

Generally speaking, for the signal processing of electronic products, transformer components and common mode choke components are usually arranged on the circuit board to achieve the purpose of filtering noise. The current method is to realize the functions of voltage transformation and filtering by respectively winding windings on two independent cores. However, this implementation requires a larger circuit layout space, which is not conducive to the development of miniaturization of current electronic products.

Therefore, the purpose of the present invention is to provide a coil device that can overcome at least one of the disadvantages of the prior art.

Therefore, the coil device of the present invention includes a core, a transformer winding, and a filter winding. The core body includes a first core body part and a second core body part connected with the same body. The transformer winding is wound on the first core part and includes a first wire and a second wire. The filter winding is wound on the second core part.

The effect of the present invention is: through the design that the transformer winding and the filter winding are respectively wound on the same core body, the filtering and transformer functions can be realized on a single core body at the same time, thereby saving the space of the circuit layout and reducing the size. The volume of electronic products.

1: core

10: Through hole

11: The first core part

12: The second core part

2: Transformer winding

21: The first wire

22: second wire

23: output section

24: The first head end

25: first tail end

26: second head end

27: second tail end

3: filter winding

31: third wire

32: Fourth wire

33: Third head end

34: third tail end

35: The fourth head end

36: fourth tail end

A: Counterclockwise

B: clockwise

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: FIG. 1 is a perspective view of a first embodiment of a coil device of the present invention; FIG. 2 is a first embodiment of the present invention. Equivalent circuit diagram; and Figure 3 is a perspective view of a second embodiment of the coil device of the present invention.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numbers.

Referring to FIGS. 1 and 2, a first embodiment of the coil device of the present invention includes a core 1, a transformer winding 2, and a filter winding 3.

The core 1 is an annular iron core, and includes a first core portion 11 and a second core portion 12 which are connected in a ring shape around its axis. The core 1 also includes a through hole 10 arranged in the center. However, during implementation, the core 1 may also have other shapes, such as but not limited to a rod shape.

The transformer winding 2 is wound on the first core portion 11 and includes a first wire 21 and a second wire 22 wound at intervals along the length of the first core portion 11. The first wire 21 has a first head end 24 and a first tail end 25 that are opposite and extend out of the first core portion 11, and the second wire 22 has an opposite and extends out of the first core portion. A second head end 26 and a second tail end 27 adjacent to the first tail end 25 outside the portion 11. The transformer winding 2 also includes an output section 23 formed by insulating and twisting the first tail end portion 25 and the second head end portion 26.

The filter winding 3 is wound on the second core portion 12 and includes a third wire 31 and a fourth wire 32. The third wire 31 and the fourth wire 32 are along the second core portion 12 The extension direction is staggered and stretched and wound on the second core portion 12 in the same direction. The third wire 31 has a third head portion 33 and a third tail portion 34 that are opposite and extend out of the second core portion 12, and the fourth wire 32 has opposite and extends out of the second core portion A fourth head end 35 and a fourth tail end 36 outside the portion 12.

When the coil device of the present invention is in the winding manufacturing industry, the winding sequence of the transformer winding 2 and the filter winding 3 is not particularly limited. The winding method of the transformer winding 2 will be described below.

When the transformer winding 2 is wound, the first wire 21 and the second wire 22 are respectively wound on two opposite sections of the first core portion 11. First, the first wire 21 is passed through the through hole 10 of the core 1, and then it is looped along the surface of the core 1 and then passed through the through hole 10 again. After being looped in the counterclockwise direction A several times, it will form The first headend The portion 24 and the first tail end portion 25. Then, in the same winding manner, the second wire 22 is also looped in the counterclockwise direction A several times to form the second head end 26 and the second tail end 27, and the second head end 26 is relatively adjacent to the first end portion 25, and the number of winding turns of the second wire 22 is the same as the number of winding turns of the first wire 21. Finally, the adjacent first tail end portion 25 and the second head end portion 26 are twisted together to form the output section 23, and the output section 23 is the center tap of the transformer winding 2.

When winding the filter winding 3, the third wire 31 and the fourth wire 32 are placed side by side and pass through the through hole 10 at the same time, and surround the second core portion 12, and loop in the clockwise direction B After several times, the third head end 33 and the fourth head end 35 are extended from one end section of the second core part 12, and at the other end area of the second core part 12 The segment extends from the third end portion 34 and the fourth end portion 36. It should be noted that, in order to prevent the magnetic flux generated by the filter winding 3 from affecting the magnetic flux of the transformer winding 2, the number of winding turns of the third wire 31 is designed to be smaller than that of the first wire 21 and the second wire 22 Number of turns.

In the first embodiment, since the filter winding 3 is used to form a common mode filter inductor to filter out noise, the third wire 31 and the fourth wire 32 are wound synchronously, and the The number of winding turns of the third wire 31 is designed to be the same as the number of winding turns of the fourth wire 32. However, in other embodiments of the present invention, as long as the purpose of filtering noise can be achieved, the winding method of the filter winding 3 is not limited to the method described in the first embodiment.

When the coil device of the present invention is used, the third tail end 34 will be electrically connected to the first head end 24, and the fourth tail end 36 will be electrically connected to the second tail end 27, so that the circuit signal to be processed passes through After the filter winding 3 filters out noise, it passes through the transformer winding 2 and then is output by the output section 23.

Referring to FIG. 3, a second embodiment of the coil device of the present invention has substantially the same structure as the first embodiment, except that the first wire 21 and the second wire 22 of the transformer winding 2 are side by side and simultaneously It passes through the through hole 10 and surrounds the first core portion 11 in a counterclockwise direction A.

In summary, through the design that the transformer winding 2 and the filter winding 3 are wound on the same core 1 respectively, the transformer and filtering functions can be realized on a single core at the same time, thereby saving circuit layout space, and at the same time It can also reduce the size of electronic products. Furthermore, the number of winding turns of the third wire 31 is smaller than the number of winding turns of the first wire 21 and the second wire 22, so that the filter winding 3 and the transformer winding 2 can be produced on a single core. The filtering effect of is a rather innovative and practical creation, so it can indeed achieve the purpose of the present invention.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to Within the scope covered by the patent of the present invention.

1: core

10: Through hole

11: The first core part

12: The second core part

2: Transformer winding

21: The first wire

22: second wire

23: output section

24: The first head end

25: first tail end

26: second head end

27: second tail end

3: filter winding

31: third wire

32: Fourth wire

33: Third head end

34: third tail end

35: The fourth head end

36: fourth tail end

A: Counterclockwise

B: clockwise

Claims (9)

A coil device includes: a core body including a first core body portion and a second core body portion connected in the same body; a transformer winding wound on the first core body portion and including a first wire And a second wire, the first wire has a first head end, the second wire has a second tail end; and a filter winding, wound on the second core portion, and includes a third Lead and a fourth lead, the third lead has a third end electrically connected to the first end, and the fourth lead has a fourth end electrically connected to the second end . The coil device according to claim 1, wherein the third wire and the fourth wire are staggered along the longitudinal direction of the second core and are wound around the second core in the same direction. The coil device according to claim 2, wherein the number of winding turns of the third wire is equal to the number of winding turns of the fourth wire. The coil device according to claim 2, wherein the first wire and the second wire are wound on the first core portion at intervals along the longitudinal direction of the first core, and the first wire further has a first wire A tail end, the second wire further has a second head end, and the transformer winding further includes an output section formed by twisting the first tail end and the second head end. The coil device according to claim 2, wherein the first wire and the second wire are staggered along the longitudinal direction of the first core and are wound on the first core in the same direction, and the first wire It also has a first tail end, the first The two wires also have a second head end, and the transformer winding further includes an output section formed by twisting the first tail end and the second head end. The coil device according to claim 4 or 5, wherein the number of winding turns of the first wire is equal to the number of winding turns of the second wire. The coil device according to claim 6, wherein the number of winding turns of the third wire is smaller than the number of winding turns of the first wire and the second wire. The coil device according to claim 7, wherein the core body has a ring shape. The coil device according to any one of claims 1 to 5, wherein the core body has a ring shape.

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