TWI386958B - Inductance device - Google Patents

Description

Inductive device

The invention relates to an inductive device, in particular to a modular inductive device.

A general inductive device, such as an inductor, a transformer, etc., is one or more coils wound on a core made of ferromagnetic material, and is generated after the coil is energized and the core is generated. effect. In the current inductor manufacturing industry, for the manufacture of larger transformers, the coil can be wound around the core by a special winding machine. Therefore, the overall process is highly automated, but for small In the case of transformers, especially for pulse transformers used in the field of digital communication, because of the relatively small size of the toroidal core, in the industry, it is still mostly used to manually wind the preset winding. The number of turns of the enameled wire is wound around the toroidal core, and the operator places the iron core wound with the coil into a casing for subsequent packaging work. However, there are many disadvantages in the manual work:

1. Process time/output is low;

Due to the small size of the iron core, it is necessary to completely rely on the operator of the production line to accurately extend the enameled wire back and forth when winding the coil, so that there is a way to tightly wrap the enameled wire on the iron core, but this process is not only time-consuming and laborious. Production costs (personnel expenses, etc.) are also relatively high, which in turn leads to a decline in overall process capability, and it is impossible to automate mass production.

2. Low finished product yield:

Different types of pulse transformers require different number of wound coils. Therefore, the operator must accurately wind the correct number of coils tightly on the core, and this highly artificial process is quite easy for the operator. Human factors such as loss affect the manufacturing quality and precision, and thus greatly increase the deviation between the actual specifications of the finished product and the preset specifications. Moreover, the general enameled wire often breaks or is damaged due to the influence of external force during winding or in subsequent packaging operations.

It can be seen from the above disadvantages that in the prior art, a small inductive device using an enameled wire as a coil and manually wound, there is still much room for improvement in terms of overall structure and process efficiency.

Accordingly, it is an object of the present invention to provide an inductive device that replaces existing iron cores and enameled wires by a nickel-zinc substrate and circuit printing technology having a high initial magnetic permeability.

Thus, the inductive device of the present invention comprises: a substrate, and a coil unit.

The substrate is made of a nickel-zinc material having an initial magnetic permeability of 1500 or more, and has a plate body portion and a plurality of penetrating portions which are spaced apart from each other on the plate body portion, and the plate body portion has an opposite A layer and a second layer, each through portion extending through the first layer and the second layer.

The coil unit has a plurality of first connecting segments respectively disposed on the through portion of the substrate and having electrical conductivity, a plurality of conductive layers disposed on the first layer of the plate portion and corresponding to the first connection a second connecting segment electrically connected to the segment, and a plurality of third connecting segments having electrical conductivity and disposed on the second layer of the plate portion and electrically connected to the corresponding first connecting segments, the first Second, the third connecting segment cooperatively forms at least one current path.

Further, another object of the present invention is to provide an inductive device having a composite substrate, the inductive device comprising: a substrate, and a coil unit.

The substrate has a plurality of plate body portions stacked one on another, and a plurality of penetrating portions penetrating the plate body portions at intervals, and the plate body portions are made of a nickel-zinc material having an initial magnetic permeability of 1,500 or more.

The coil unit has a plurality of first connecting segments respectively disposed on the through portion of the substrate and having electrical conductivity, a plurality of conductive layers disposed on the upper surface of the upper body portion of the uppermost layer, and corresponding thereto a second connecting section electrically connected to the first connecting section, and a plurality of third connecting sections electrically conductive and disposed on a lower surface of the opposite lowermost board portion and electrically connected to the corresponding first connecting sections The first, second, and third connecting segments cooperatively form at least one current path.

The effect of the invention is that the substrate is made of nickel-zinc material having an initial magnetic permeability of 1500 or more, so that it has good magnetic permeability but is not electrically conductive, so that circuit printing can be directly performed thereon. An electric current path substantially wound around the plate body portion of the substrate is formed, thereby forming an inductive device that does not require enamel winding and is highly modularized.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention.

Before the present invention is described in detail, it is noted that in the following description, like elements are denoted by the same reference numerals.

Referring to Figures 1 and 2, a first preferred embodiment of the inductive device of the present invention comprises: a substrate 1, and a coil unit 2.

The substrate 1 is made of a nickel-zinc material having an initial magnetic permeability (μi value) of 1500 or more, and has a plate portion 11 and a plurality of penetrating portions 12 which are spaced apart from each other on the plate portion 11. The plate body portion 11 has opposite first and second layers 111 and 112, and each of the penetrating portions 12 extends through the first and second layers 111 and 112. In the present embodiment, a nickel-zinc ferromagnetic material having an initial magnetic permeability of about 2,000 is used as a raw material for fabricating the substrate 1.

In general, nickel-zinc-based ferromagnetic materials have an initial magnetic permeability of about 850, compared to other ferromagnetic materials with high initial permeability, such as manganese-zinc-based iron with an initial magnetic permeability of about 4,000. The magnetic material has a slightly lower initial magnetic permeability and a slight insufficient magnetic conduction and conversion performance, but the nickel-zinc-based ferromagnetic material has a non-conducting property. Therefore, in this embodiment, the non-conductive property is utilized. And then increase its initial magnetic permeability to about 2000, so that it can have good magnetic conduction/conversion performance like the manganese-zinc-based ferromagnetic material, and at the same time take into account the non-conducting characteristics, thereby enabling the substrate 1 The board portion 11 is, like the same printed circuit board, directly printed on the circuit.

As to how to improve the initial magnetic permeability of the nickel-zinc-based ferromagnetic material by controlling the high-temperature sintering process during the molding of the nickel-zinc-based substrate 1 or the fine adjustment of the composition ratio of the constituent materials, it should be generally in the technical field. The technical means familiar to the knowledge are not repeated here.

The coil unit 2 has a plurality of first connecting segments 21 respectively disposed on the through portion 12 of the substrate 1 and having electrical conductivity, and a plurality of conductive layers disposed on the first layer 111 of the plate portion 11 and corresponding thereto The second connecting segments 22 electrically connected to the first connecting segments 21 and the plurality of conductive layers are disposed on the second layer 112 of the board portion 11 and electrically connected to the corresponding first connecting segments 21 The third connecting section 23, the first, second, and third connecting sections 21, 22, 23 cooperatively form a current path, and the current path is substantially formed on the board portion 11 of the substrate 1. Winding.

It should be noted that this embodiment is exemplified by the formation of an inductive component of a toroid coil, which is equivalent to a current path substantially wound on the body portion 11 of the substrate 1. The enamel wire wound on the ferromagnetic material is generally formed to form a magnetic loop coil type inductor.

Further, a punching technique for forming the through portions 12 on the substrate 1 and printing the corresponding first, second, and third connecting segments 21, 22, 23 to the board portion 11 of the substrate 1 respectively The circuit printing techniques on the first layer 111, the second layer 112, and the through portion 12 should be well known to those skilled in the art of printed circuit board manufacturing or parallel printing, and will not be described herein.

Referring to FIG. 3, a second preferred embodiment of the inductive device of the present invention is substantially the same as the first preferred embodiment, and the similarities are no longer in common, wherein the difference is that the embodiment is to form a A pulse transformer is exemplified. Therefore, the first, second, and third connecting segments 21, 22, and 23 are matched to form a two-phase spaced and independent current path, that is, the pulse transformer. The primary side and the secondary side, and the current paths are substantially entangled with the plate body portion 11 of the substrate 1, and the design is such that the embodiment becomes a pulse transformer as shown in the equivalent circuit diagram of FIG. Aspect.

Of course, the winding ratio of the primary side and the secondary side is determined by the specification of the pulse transformer or the group anti-matching adjustment to be achieved, and in this embodiment, only the primary side and the secondary side are used. The case where the winding ratio is 1:1 is exemplified. In actual implementation, the number and arrangement positions of the through portions 12 and the second and third connecting segments 22, 23 can be designed by the actual specifications of the transformer to achieve the required Winding ratio.

Referring to FIG. 5, a third preferred embodiment of the inductive device of the present invention is substantially the same as the second preferred embodiment, and the similarities are no longer in common, wherein the difference is that the embodiment is to form a A pulse transformer having a common-mode choke is exemplified, and therefore, the first, second, and third connecting sections 21, 22, 23 are cooperatively formed into two-phase intervals and Independent current paths, and the current paths are substantially wound around the plate portion 11 of the substrate 1, and are designed to make the embodiment have a turbulent flow as shown in the equivalent circuit diagram of FIG. Pulse transformer configuration in the circle and center tap configuration.

When the first, second, and third connecting sections 21, 22, 23 are energized to form a current path, and an electromagnetic reaction occurs between the first and second connecting sections 21, 22, and 23, and the board portion 11 of the substrate 1, the magnetic number circuit generated The first, second, and third connecting sections 21, 22, 23 are substantially confined in the space defined by the board body portion 11, and thus the various embodiments described above are also A configuration in which two or more independent inductors or pulse transformers are integrated on the same substrate 1 can be used (as shown in FIG. 7).

Referring back to FIG. 1 and referring to FIG. 8, a fourth preferred embodiment of the inductive device of the present invention is substantially the same as the first preferred embodiment, and the same is no longer in common, wherein the difference is that the present embodiment For example, a multilayer composite substrate 1 having two plate body portions 11 stacked one on another and a plurality of penetrating portions 12 penetrating the plate body portions 11 at intervals are provided.

The coil unit 2 has a plurality of first connecting segments 21 respectively disposed on the penetrating portion 12 of the substrate 1 and having electrical conductivity, and a plurality of conductive layers disposed on the upper surface of the plate body portion 11 located at the uppermost layer, and Corresponding to the second connecting segments 22 electrically connected to the first connecting segments 21, and the plurality of wires having electrical conductivity and disposed on the lower surface of the plate portion 11 located at the lowermost layer, and corresponding to the first connections The third connecting section 23 electrically connected to the segment 21, the first, second, and third connecting sections 21, 22, 23 cooperatively form a current path.

The advantage of forming the substrate 1 by using the laminated plate body portion 11 is that since the nickel-zinc ferromagnetic material has high hardness, it can be formed by punching technology on the plate body portion 11 having a relatively small thickness. When the penetrating portions 12 are overlapped with each other and the corresponding penetrating portions 12 are concentrically aligned during lamination, the difficulty in punching the hard substrate can be effectively reduced, thereby increasing the number of the penetrating portions 11 . The molding accuracy of the penetrating portion 12 can also relatively reduce the probability of occurrence of defective products.

Of course, the number of laminations of the plate body portion 11 of the substrate 1 may be determined by design considerations in actual implementation, and is not limited to the specific embodiment of the above-described two-layer plate body portion 11.

It can be seen from the above various preferred embodiments that since the configuration types of the inductor and the pulse transformer are numerous, it is difficult to describe all possible variations in this case, but it is believed that the derivation of the above embodiments is Those skilled in the art will readily be able to apply the present invention to the manufacture of inductive devices of various types and specifications.

With the above design, the inductive device of the present invention has the following advantages:

1. It replaces the conventional iron core and the enameled wire structure wound thereon, and the pulse transformer finished product produced by the structure has the advantages of low signal loss:

The substrate 1 is manufactured by using a nickel-zinc material having a high initial magnetic permeability, so that the substrate 1 itself is of the same conventional core structure, and the coil unit 2 can be made by the non-conductive property of the nickel-zinc material. Directly printed onto the substrate 1, which effectively replaces the conventional structure of using an iron core and an enameled wire wound around the core.

In addition, when the pulse transformer formed by the above structure is actually tested, the intensity of the signal transmission and the return loss of the signal transmission are lower than those of the conventional pulse transformer, so that the present invention is quite suitable for application. Used as a pulse transformer for broadband signal transmission.

2. There is no need to manually wind up, which will greatly increase production capacity:

The present invention manufactures the penetrating portions 12 and the first to third connecting segments 21, 22, and 23 by integrating parallel printing techniques and manufacturing punching, circuit wiring, and the like of the printed circuit board, thereby replacing the conventional The enameled wire of the wound coil, in addition, the above-mentioned automated process of punching and parallel printing is a mature technology in the industry, so it can be easily and effectively implemented to replace the conventional manual winding operation, thereby greatly improving the overall Process efficiency and cost reduction.

3. High finished product yield:

As mentioned above, since the automated process technology for punching and parallel printing is quite mature, the manufactured inductive devices are superior to the conventional products in terms of finished product yield, durability, and quality control. .

4. The finished product is small in thickness and low in weight:

The present invention utilizes the circuit wiring on the printed circuit board to replace the conventional enameled wire coil, thereby greatly reducing the space and weight occupied by the coil winding of the inductive device by the microcircuit circuit design of the printed circuit board. In addition, the present invention further utilizes a nickel-zinc-based ferromagnetic material having non-conducting properties to fabricate the substrate 12, thereby directly replacing the conventional core structure and external bearing (such as CASE and BOBBIN), which is in line with the pursuit of the electronics industry. Light, thin, short, and small.

5. Modularization of the device:

The substrate 1 of the present invention is equivalent to a conventional iron core, and is combined with the coil unit 2 directly printed thereon to form various types of inductive devices, thereby having the advantages of high modularization of the finished product, and can be quite easily Integration of other electronic components. In addition, in the actual production of the present invention, a configuration in which two or more independent inductive devices are integrated on the same substrate 1 can be used, thereby further improving the highly modular features of the device of the present invention.

In summary, the inductive device of the present invention integrates a printed circuit board punching and circuit parallel printing technology, so that the plate body portion 11 of the substrate 1 is formed as a non-conducting iron core structure during molding, and is in circuit wiring. At the design stage, the penetrating portions 12 and the first to third connecting segments 21, 22, and 23 are arranged in a manner that can be fitted to the plate body portion 11 of the substrate 1 in a complementary manner, and are reused. The punching and parallel printing techniques of the multilayer printed circuit board to produce the through portions 12 and the first to third connecting portions 21, 22, 23, and thereby replacing the core of the conventional inductive device and winding The enameled wire structure on the iron core does not require manual winding, and the substrate 1 can also replace the external load bearing (CASE and BOBBIN) of the conventional inductive device, thereby achieving "significantly increasing productivity", "high yield", and "thickness". The advantages of small size and low weight, as well as the "high modularization of the finished device", can indeed achieve the object of the present invention.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

1. . . Substrate

11. . . Plate body

111. . . level one

112. . . Second floor

12. . . Penetration

2. . . Coil unit

twenty one. . . First connection segment

twenty two. . . Second connection segment

twenty three. . . Third connection segment

Figure 1 is a top plan view showing a first preferred embodiment of the inductive device of the present invention;

Figure 2 is a cross-sectional view showing the cross-sectional view of the cut surface line II of the first preferred embodiment of Figure 1;

Figure 3 is a top plan view showing a second preferred embodiment of the inductive device of the present invention;

4 is an equivalent circuit diagram illustrating an equivalent circuit of the pulse transformer formed by the second preferred embodiment;

Figure 5 is a top plan view showing a third preferred embodiment of the inductive device of the present invention;

6 is an equivalent circuit diagram illustrating an equivalent circuit of a pulse transformer having a choke formed by the third preferred embodiment;

Figure 7 is a plan view showing a variation of the third preferred embodiment; and

Figure 8 is a cross-sectional view showing a fourth preferred embodiment of the inductive device of the present invention.

1. . . Substrate

11. . . Plate body

111. . . level one

112. . . Second floor

12. . . Penetration

2. . . Coil unit

twenty one. . . First connection segment

twenty two. . . Second connection segment

twenty three. . . Third connection segment

Claims (6)

An inductive device comprising: a substrate made of a nickel-zinc material having an initial magnetic permeability of 1500 or more, having a plate body portion and a plurality of penetrating portions spaced apart from the plate body portion, the plate The body has opposite first and second layers, each of which penetrates the first layer and the second layer; and a coil unit having a plurality of layers respectively disposed on the through portion of the substrate and having conductivity a connecting portion, a plurality of second connecting segments which are electrically conductive and are disposed on the first layer of the plate portion and are electrically connected to the corresponding first connecting segments, and a plurality of wires having electrical conductivity and disposed on the plate body The third connecting segments on the second layer and electrically connected to the corresponding first connecting segments, the first, second, and third connecting segments cooperatively form at least one current path. The inductive device of claim 1, wherein the first, second, and third connecting segments cooperatively form two spaced apart and independent current paths. The inductive device according to claim 2, wherein the substrate is made of a nickel-zinc material having an initial magnetic permeability of 2,000. An inductive device comprising: a substrate having a plurality of plate body portions stacked one on another, and a plurality of penetrating portions penetrating through the plate body portions at intervals, wherein the plate body portion is made of nickel having an initial magnetic permeability of 1500 or more a coil unit, and a coil unit having a plurality of first connecting segments respectively disposed on the through portion of the substrate and having electrical conductivity, and having a plurality of conductive layers disposed on the upper surface of the uppermost plate portion And a second connecting segment electrically connected to the corresponding first connecting segments, and a plurality of conductive layers disposed on the lower surface of the opposite body portion and corresponding to the first connection The third connecting segments electrically connected to the segments, the first, second, and third connecting segments cooperatively forming at least one current path. The inductive device of claim 4, wherein the first, second, and third connecting segments cooperatively form two spaced apart and independent current paths. The inductive device according to claim 5, wherein the plate body portion is made of a nickel-zinc material having an initial magnetic permeability of 2,000.