CN112582153A - Inductor and electronic device using same - Google Patents

Abstract

The invention relates to an inductor and an electronic device applying the inductor, wherein the inductor comprises an annular magnetic core and a winding wound on the annular magnetic core, the winding is formed by at least two connecting sections which are sequentially connected and surrounding a yoke, each connecting section is a flat conductor, and the flat surface of each connecting section surrounds the surface of the yoke. The invention can improve the assembly efficiency of the inductor and realize automatic production.

Description

Inductor and electronic device using same

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of inductors, in particular to an inductor and an electronic device applying the same.

[ background of the invention ]

The conventional common mode inductor generally includes a toroidal core and two windings wound around the toroidal core, and for the common mode inductor requiring a large current, a relatively thick cable is usually required to be spirally wound around the toroidal core. During winding, a conducting wire is required to be bent for multiple times from head to tail, the winding difficulty is high due to the small inner diameter and thick cable of the annular magnetic core, the working efficiency is low, and the annular magnetic core can bear large pulling force and can cause abrasion of the magnetic core.

[ summary of the invention ]

The invention aims to provide an inductor and an electronic device applying the inductor, which can improve the production efficiency of the inductor and realize automatic production.

A first aspect of the present invention provides an inductor including a toroidal core and a winding wound around the toroidal core; the winding is formed by at least two connecting sections which are connected in sequence and surround the magnetic core, each connecting section is a flat conductor, and the flat surface of each connecting section surrounds the surface of the magnetic core.

Furthermore, the at least two connecting sections comprise U-shaped connecting sections, each U-shaped connecting section comprises a base arm and two side arms vertically extending from two ends of each base arm, the base arms of the U-shaped connecting sections are attached to the axial end faces of the annular magnetic cores, and the two side arms are attached to the inner side faces and the outer side faces of the annular magnetic cores respectively.

Further, the at least two connecting sections comprise Z-shaped connecting sections, each Z-shaped connecting section comprises a Z-shaped base arm and a first extending section and a second extending section which are connected to two ends of the Z-shaped base arm and perpendicular to the flat surface of the Z-shaped base arm, the flat surface of the Z-shaped base arm abuts against the outer side surface of the annular magnetic core, and the first extending section and the second extending section abut against two axial end surfaces of the annular magnetic core and are welded with the adjacent connecting sections.

Further, two at least linkage segments include an end connection section, the end connection section includes installation department and connecting portion, the installation department is the U-shaped, including a base arm and two side arms that extend perpendicularly from the base arm both ends respectively, the base arm pastes and arrives an axial terminal surface of annular magnetic core, two side arms are followed the axial extension of annular magnetic core just pastes respectively and leans on the medial surface and the lateral surface of annular magnetic core, connecting portion are the end that L shape is connected in one of them side arm, the base arm and the connecting portion of installation department are located two axial ends of annular magnetic core respectively.

A second aspect of the present invention provides a common mode inductor including a toroidal core and two windings wound to a yoke portion of the toroidal core; each winding comprises at least two connecting sections which are connected in sequence and encircle the yoke, each connecting section is a flat conductor, and the flat surface of each connecting section encircles the surface of the yoke.

Furthermore, in the two connected connecting sections, the head end and the tail end of at least one connecting section are staggered along the length direction of the yoke part.

Further, at least one of the two connecting sections has a first portion extending along the length direction of the yoke portion and a second portion perpendicular to the first portion, so that the head and tail ends of the connecting section are staggered along the length direction of the yoke portion.

Further, the two connecting sections are connected by welding.

Further, the shape of the annular magnetic core is a circular ring body, an oval ring body or a square ring body.

Furthermore, the at least two connecting sections comprise a head connecting section, the head connecting section is U-shaped and comprises a base arm and two side arms which vertically extend from two ends of the base arm respectively; the base arm is attached to one axial end face of the yoke portion, the two side arms extend along the axial direction of the annular magnetic core and are attached to the inner side face and the outer side face of the yoke portion respectively, and one of the side arms protrudes out of the axial end face of the annular magnetic core.

Further, two at least linkage segments include a tail linkage segment, the tail linkage segment includes an installation department and connecting portion, the installation department is the U-shaped, including a base arm and two side arms that extend perpendicularly from the base arm both ends respectively, the base arm pastes and arrives another axial end face of yoke portion, two side arms are followed annular magnetic core's axial extension just pastes respectively and leans on the medial surface and the lateral surface of yoke portion, connecting portion connect in the end of one of them side arm, the base arm and the connecting portion of installation department are located two axial ends of yoke portion respectively.

Furthermore, the at least two connecting sections comprise a second connecting section and a third connecting section which are connected between the head connecting section and the tail connecting section, the second connecting section is U-shaped and comprises a base arm, a first side arm and a second side arm, the first side arm and the second side arm vertically extend from two ends of the base arm respectively, the base arm is positioned at the top end of the yoke, the length of the first side arm is greater than that of the second side arm, the first side arm penetrates through a through hole of the annular magnetic core, the tail end of the first side arm extends out of the bottom end of the through hole, the first side arm and the second side arm are positioned on the inner side and the outer side of the yoke respectively, and a protruding part extends out of one; the third connecting section is installed on the outer side face of the yoke portion and comprises a Z-shaped base arm, a first extending section and a second extending section, wherein the first extending section and the second extending section are connected to two ends of the Z-shaped base arm and perpendicular to the flat face of the Z-shaped base arm, and the first extending section and the second extending section are respectively welded with adjacent connecting sections.

Further, at least two linkage segments further include the fourth linkage segment, and the fourth linkage segment is the U-shaped, including a base arm and first side arm and the second side arm that extends perpendicularly from the base arm both ends, the fourth linkage segment passes through the U-shaped opening and installs in the bottom face of yoke portion from the bottom direction of annular magnetic core, the length of first side arm is greater than the length of second side arm, in first side arm inserts the through-hole of annular magnetic core, and the end of first side arm stretches out from the top of through-hole, the end of first side arm of third linkage segment welding to fourth linkage segment, the tail linkage segment welding is to one side of the second side arm of fourth linkage segment.

A third aspect of the present invention provides an electronic device, including a PCB board, on which the inductor is disposed.

Further, the annular magnetic core has an axial direction substantially perpendicular to the PCB board, and a space for mounting an electronic component is formed between the annular magnetic core and the PCB board.

According to the invention, the winding is divided into at least two connecting sections in a prefabricated shape, the connecting sections are respectively arranged on the yoke part of the annular magnetic core so as to complete winding of the winding, the winding is simple to wind, automatic production can be realized, production efficiency is improved, and meanwhile, the connecting sections are flat, and the flat surfaces of the connecting sections are tightly attached to the surface of the yoke part of the annular magnetic core for winding, so that the occupied space of the inductor is further simplified.

[ description of the drawings ]

Fig. 1 is a schematic structural diagram of a common mode inductor according to a first embodiment of the present invention;

FIG. 2 is an exploded view of the common mode inductor shown in FIG. 1;

fig. 3 is a schematic structural diagram of a common mode inductor according to a second embodiment of the present invention;

FIG. 4 is an exploded view of the common mode inductor shown in FIG. 3;

fig. 5 is a schematic structural diagram of a common mode inductor according to a third embodiment of the present invention;

FIG. 6 is an exploded view of the common mode inductor shown in FIG. 5;

fig. 7 is a schematic diagram of an electronic device including the common mode inductor shown in fig. 1.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It is to be understood that the drawings are provided solely for the purposes of reference and illustration and are not intended as a definition of the limits of the invention. The connections shown in the drawings are for clarity of description only and are not limiting as to the manner of connection.

It is to be noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1, an inductor according to a first embodiment of the present invention is a common mode inductor 100, which includes a toroidal core 10 and two windings 20 wound around the toroidal core 10. In this embodiment, the annular magnetic core 10 includes two opposite long yoke portions 101 and two opposite short yoke portions 102, the long yoke portions 101 and the short yoke portions 102 enclose a rectangular frame, and a through hole 14 is formed in the middle of the frame. In the present embodiment, the winding 20 is wound around the surface of the long yoke 101. It is understood that the shape of the ring-shaped magnetic core 10 may also be, for example, a circular ring body, an elliptical ring body, or the like.

The winding directions of the two windings 20 are opposite. Each winding 20 is formed by at least two connecting segments connected in series around a long yoke 101. In this embodiment, each winding 20 includes two end connection sections connected in sequence, that is, a first connection section 21 and a tail connection section 22, the first connection section 21 and the tail connection section 22 are mounted on the surface of the long yoke 101 from different directions, and the first connection section 21 and the tail connection section 22 are connected in sequence and then surround the long yoke 101 to form a two-turn air-core coil. In this embodiment, two windings 20 are wound around one of the long yoke portions 101, and are in contact with the top end surface 11 and the bottom end surface 15 of the annular magnetic core 10, and the outer side surface 12 and the inner side surface 13 connected between the top end surface 11 and the bottom end surface 15.

Referring to fig. 2, the leading connecting section 21 and the trailing connecting section 22 are both flat conductors and are integrally formed, and their flat surfaces are closely attached to the surface of the long yoke portion 101 of the annular magnetic core 10. The end-to-end connection sections 22 are staggered in the longitudinal direction of the long yoke portion 101 (i.e., the circumferential direction of the yoke portion). Specifically, the head link 21 is substantially U-shaped, and includes a base arm 211, and a first side arm 212 and a second side arm 213 extending perpendicularly from two ends of the base arm 211, respectively, and the head link 21 is mounted on the bottom end surface 15 of the corresponding long yoke 101 from the bottom end direction of the ring-shaped magnetic core 10 through the U-shaped opening. The base arm 211 is located at the bottom end of the corresponding long yoke portion 101, and the flat surface of the base arm 211 is in close contact with the bottom end surface 15 of the corresponding long yoke portion 101. The length of the first side arm 212 is greater than the length of the second side arm 213. The first side arm 212 is inserted into the through hole 14 of the ring-shaped magnetic core 10 and the end of the first side arm 212 protrudes from the top end of the through hole 14 for connecting the common mode inductor 100 with a power supply or a circuit board. The first side arm 212 and the second side arm 213 are respectively positioned inside and outside the corresponding yoke portion 101, and the flat surfaces of the first side arm 212 and the second side arm 213 are in close contact with the inner surface and the outer surface of the corresponding yoke portion 101.

The tail connecting section 22 includes a mounting portion 221 and a connecting portion 222, the mounting portion 221 is U-shaped, and the tail connecting section 22 is mounted on the top end surface 11 of the corresponding yoke portion 101 from the top end direction of the annular magnetic core 10 through the U-shaped opening of the mounting portion 221. The mounting portion 221 includes a base arm 223, and a first side arm 224 and a second side arm 225 vertically extending from both ends of the base arm 223. The base arm 223 is positioned at the tip of the corresponding long yoke portion 101, and the flat surface of the base arm 223 is in close contact with the tip surface 11 of the corresponding long yoke portion 101. The first side arm 224 and the second side arm 225 are respectively positioned inside and outside the corresponding yoke portion 101, and the flat surfaces of the first side arm 224 and the second side arm 225 are in close contact with the inner side surface 13 and the outer side surface 12 of the corresponding yoke portion 101. The first side arm 224 is inserted into the through hole 14 of the ring-shaped magnetic core 10, and the tip of the first side arm 224 protrudes from the bottom end of the through hole 14. The length of the first side arm 224 is greater than the length of the second side arm 225. The end of the second side arm 225 is connected to the second side arm 213 of the head link segment 21. Preferably, the end of the second side arm 225 extends toward the head link 21 along the length of the yoke portion to form a protrusion 226, and the protrusion 226 may be connected to one side of the second side arm 213 of the head link 21 by welding or the like. The link 222 is connected to the end of the first side arm 224 away from the head link section 21, and the link 222 is located at the bottom end of the corresponding long yoke 101.

Preferably, the connecting portion 222 is L-shaped, and includes a first segment 227 and a second segment 228, and the first segment 227 is connected to the end of the first side arm 224 and extends out of the annular magnetic core 10 along the length of the long yoke portion 101. The second segment 228 extends parallel to the axial direction of the annular magnetic core 10 and in a direction away from the annular magnetic core 10 for mounting to the PCB board 201 (shown in fig. 7). In this embodiment, the lengths of the first sections 227 of the two windings 20 are different, and it is understood that the lengths of the first sections 227 of the two windings 20 may also be the same.

During assembly, the tail connecting section 22 may be installed: the U-shaped opening of the mounting portion 221 of the tail link 22 is mounted to the distal end surface 11 of the corresponding long yoke portion 101 from the distal end direction of the ring-shaped magnetic core 10 (the arrow near the tail link 22 in FIG. 2 indicates the mounting direction of the tail link 22), the flat surface of the base arm 223 is made to abut against the distal end surface 11 of the corresponding long yoke portion 101, the first side arm 224 is made to penetrate into the through hole 14 and the flat surface thereof is made to abut against the inner side surface 13 of the corresponding long yoke portion 101, the end of the first side arm 224 extends from the bottom end of the through hole 14, the flat surface of the second side arm 225 is closely attached to the outer side surface 12 of the corresponding yoke portion 101, the protrusion 226 faces the second side arm 213 of the link 21, the link 222 is brought close to the bottom end surface of the ring core 10, and the first segment 227 is made perpendicular to the axial direction of the annular magnetic core 10, and the second segment 228 is made parallel to the axial direction of the annular magnetic core 10 and extends in a direction away from the bottom end of the annular magnetic core 10 for mounting to the PCB board 201 (as shown in fig. 7). Preferably, the tail connecting section 22 is movable along the length of the yoke portion 101 so that the end of the first section 227 and the second section 228 move out of the toroidal core 10. Installing the first connecting section 21: the U-shaped opening of the head connecting section 21 faces the bottom end of the annular magnetic core 10, the head connecting section 21 is installed on the bottom end face 15 of the corresponding long yoke part 101 (the arrow beside the head connecting section 21 in fig. 2 indicates the installation direction of the head connecting section 21), the flat face of the base arm 211 is made to be tightly attached to the bottom end face 15 of the corresponding long yoke part 101, the first side arm 212 is arranged in the through hole 14 of the annular magnetic core 10 in a penetrating mode, the flat face of the first side arm 212 is made to be tightly attached to the inner side face 13 of the corresponding long yoke part 101, the tail end of the first side arm 212 extends out of the top end of the through hole 14 to be used for being connected with a power supply or a circuit board, and the flat face of the second. Finally, the projection 226 of the tail connector segment 22 is welded to the second side arm 213 of the head connector segment 21. The winding 20 is divided into a plurality of prefabricated connecting sections for installation, and a wire is not required to be wound in a reciprocating mode, so that the winding of the winding 20 is achieved, the winding is convenient, the working efficiency is high, automatic production can be achieved, and the annular magnetic core 10 is not prone to wear.

In other embodiments, the leading connecting segment 21 may be mounted to the top end surface 11 of the corresponding long yoke portion 101 from the top end direction of the annular magnetic core 10, and the trailing connecting segment 22 may be mounted to the bottom end surface 15 of the corresponding long yoke portion 101 from the bottom end direction of the annular magnetic core 10, as the size of the through hole 14 allows. And the relative positions of the head and tail connecting sections 21 and 22 are adjusted accordingly. The mounting sequence of the head-to-tail connecting sections can also be adjusted properly.

As shown in fig. 7, when the common mode inductor 100 is actually mounted on the PCB 201, the first side arm 212 or the second section 228 of the two windings 20 may be directly mounted on the PCB 201, and the ring core 10 does not need to be mounted on the PCB 201 by other auxiliary members or the like. In addition, the second segments 228 of the two windings 20 support the short yoke portion 102 of the toroidal core 10, and the toroidal core 10 may be spaced apart from the PCB 201 by a certain distance, so as to form an assembly space therebetween, and other electronic components may be mounted in the assembly space, thereby reducing the space occupied by the common mode inductor 100 on the PCB and improving the utilization rate of the PCB. It will be appreciated that the distance between the second segments 228 of the two windings 20 can be set according to actual needs. In other embodiments, the first side arm 212 of the head link section 21 may also be provided as an L-shaped link.

Fig. 3 and fig. 4 are a common mode inductor 100 according to a second embodiment of the present invention, which is different from the first embodiment in that each winding 20 is composed of four connecting segments connected in sequence, and includes a first connecting segment 21, a second connecting segment 23, a third connecting segment 24, and a tail connecting segment 22, and the first connecting segment 21, the second connecting segment 23, the third connecting segment 24, and the tail connecting segment 22 are connected in sequence and then surround a long yoke portion 101 to form a three-turn air-core coil. The first connecting section 21, the second connecting section 23, the third connecting section 24 and the tail connecting section 22 are all flat conductors and are all integrally formed, and the flat surfaces of the flat conductors can be closely attached to the surface of the long yoke part 101 of the annular magnetic core 10.

In this embodiment, each winding 20 is formed by connecting four connecting sections, and in two adjacent connecting sections, the head and the tail of at least one connecting section are staggered along the length direction of the long yoke portion 101, so that the four connecting sections are wound into a three-turn air-core coil, and the three-turn air-core coil is arranged along the length direction of the long yoke portion 101 and is not overlapped.

Specifically, in this embodiment, the structure of the first connecting section 21 is the same as that in the first embodiment, and is not described again here. In the tail connecting section 22, the structure of the connecting portion 222 is the same as that of the first embodiment, and the description thereof is omitted, and the mounting portion 221 of this embodiment is a long strip. The mounting portion 221 is pierced in the through hole 14 from the bottom end of the through hole 14 of the ring-shaped magnetic core 10, and the tip of the mounting portion 221 protrudes from the top end of the through hole 14. The flat surface of the mounting portion 221 is in close contact with the inner surface 13 of the corresponding long yoke portion 101.

The second connecting section 23 is generally U-shaped and includes a base arm 231, and a first side arm 232 and a second side arm 233 vertically extending from two ends of the base arm 231, respectively. The second connecting segment 23 is attached to the top end face 11 of the corresponding long yoke portion 10 from the top end direction of the annular magnetic core 10 through the U-shaped opening. The base arm 231 is located at the tip of the corresponding long yoke portion 101, and the flat surface of the base arm 231 is in close contact with the tip surface 11 of the corresponding long yoke portion 101. The length of the first side arm 232 is greater than the length of the second side arm 233 and is also greater than the axial length of the long yoke 101. The first side arm 232 is located in the through hole 14 of the ring-shaped magnetic core 10, and the end of the first side arm 232 protrudes from the bottom end of the through hole 14. The first side arm 232 and the second side arm 233 are respectively located inside and outside the corresponding yoke portion 101, and the flat surfaces of the first side arm 232 and the second side arm 233 are in close contact with the inner surface 13 and the outer surface 12 of the corresponding yoke portion 101. Preferably, a protrusion 234 extends transversely from a side of the second side arm 233 facing the head link section 21, and the protrusion 234 may be connected to a side of the second side arm 213 of the head link section 21 by welding or the like.

The third connecting segment 24 is mounted on the outer side surface 12 of the corresponding long yoke portion 101, and includes a Z-shaped base arm 241, and a first extension 242 and a second extension 243 connected to both ends of the Z-shaped base arm 241. Preferably, the first extension 242 and the second extension 243 are L-shaped. Both ends of the Z-shaped base arm 241 are perpendicularly connected to the vertical portion of the first extension 242 and the vertical portion of the second extension 243. The flat surface of the Z-shaped base arm 241 is in close contact with the outer surface 12 of the corresponding yoke portion 101. The lateral portion of the first extension 242 is parallel to the axial direction of the Z-shaped base arm 241 and may be connected to the end of the first side arm 232 of the second connecting section 23 by means of, for example, welding. The flat surface of the vertical portion of the first extension 242 abuts against the bottom end surface 15 of the corresponding long yoke portion 101. The lateral portion 244 of the second extension section 243 is parallel to the axial direction of the Z-shaped base arm 241, the lateral portion 244 of the second extension section 243 is parallel to the axial direction of the annular magnetic core 10, and the lateral portion 244 of the second extension section 243 may be connected to the end of the mounting portion 221 of the tail connecting section 22 by, for example, welding. The flat surface of the second extension 243 is in close contact with the distal end surface 11 of the corresponding long yoke 101. In other embodiments, the first and second extension segments may also be I-shaped, connected to the end of the Z-shaped base arm 241, perpendicular to the axial direction of the toroidal core, and welded to the second connection segment and the tail connection segment, respectively.

In this embodiment, the assembling manner and process of other elements are similar to those of the embodiment shown in fig. 2, and are not described again.

Similar to fig. 7, in practice, when the common mode inductor 100 shown in fig. 3 is mounted on the PCB 201, the first side arm 212 or the second segment 228 of the two windings 20 may be directly mounted on the PCB 201, and the mounting manner is the same as that of the first embodiment.

Fig. 5 and fig. 6 are a common mode inductor 100 according to a third embodiment of the present invention, and the present embodiment is different from the second embodiment in that each winding 20 of the present embodiment further includes a fourth connection segment 25, that is, each winding 20 is formed by sequentially connecting a first connection segment 21, a second connection segment 23, a third connection segment 24, a fourth connection segment 25, and a tail connection segment 22. At least one of the two adjacent connecting segments is staggered along the length direction of the long yoke part 101, so that the five connecting segments form a four-turn air-core coil. The five connecting sections are all flat conductors and are all integrally formed, and the flat surfaces of the five connecting sections are tightly attached to the surface of the long yoke part 101 of the annular magnetic core 10.

Specifically, in this embodiment, the structure of the first connecting segment 21 is the same as that of the first embodiment and that of the second embodiment, the structure of the tail connecting segment 22 is the same as that of the first embodiment, and the structures of the second connecting segment 23 and that of the third connecting segment 24 are the same as that of the second embodiment, which is not described again here. The fourth connecting section 25 is U-shaped and includes a base arm 251, and a first side arm 252 and a second side arm 253 extending perpendicularly from two ends of the base arm 251. The fourth connecting segment 25 is attached to the bottom end face 15 of the corresponding long yoke portion 101 through the U-shaped opening from the bottom end direction of the annular magnetic core 10. The base arm 251 is located at the bottom end of the corresponding long yoke portion 101, and the flat surface of the base arm 251 abuts against the bottom end surface of the corresponding long yoke portion 101. The length of the first side arm 252 is greater than the length of the second side arm 253. The first side arm 252 is inserted into the through hole 14 of the ring-shaped magnetic core 10, and the tip of the first side arm 252 protrudes from the top end of the through hole 14. The first side arm 252 and the second side arm 253 are respectively positioned inside and outside the corresponding yoke portion 101, and the flat surfaces of the first side arm 252 and the second side arm 253 are in close contact with the inner side surface 13 and the outer side surface 12 of the corresponding yoke portion 101. The transverse portion 244 of the second extension 243 of the third connecting segment 24 may be connected to the end of the first side arm 252 of the fourth connecting segment 25 by, for example, welding. The projection 226 of the tail link 22 may be connected to one side of the second side arm 253 of the fourth link 25 by, for example, welding.

In this embodiment, the installation manner and process of other elements are similar to those in the above embodiment, and are not described again.

In other embodiments, the first connecting segment 21 and the fourth connecting segment 25 may be mounted on the top end surface 11 of the corresponding long yoke portion 101 from the top end direction of the ring-shaped magnetic core 10, and the second connecting segment 23 and the tail connecting segment 22 may be mounted on the bottom end surface of the corresponding long yoke portion 101 from the bottom end direction of the ring-shaped magnetic core 10.

Similar to fig. 7, in practice, when the common mode inductor 100 shown in fig. 5 is mounted on the PCB 201, the first side arm 212 or the second segment 228 of the two windings 20 may be directly mounted on the PCB 201, and the mounting manner is the same as that of the first embodiment.

It will be appreciated by those skilled in the art that a suitable increase in the size of the toroidal core may result in a greater number of turns of winding on the toroidal core in accordance with the teachings of the present invention. In the other windings 20 with more than five turns, the corresponding prefabricated connecting section is only needed to be added between the head connecting section 21 and the tail connecting section 22, and the winding 20 with the corresponding number of turns can be obtained. The number of turns of the winding 20 can be set according to the number of turns of the connection section. The shape of each connecting section can also be set according to actual conditions. Preferably, the welding position of the adjacent connection segment is located outside the ring-shaped magnetic core 10, so as to facilitate the welding operation.

Fig. 7 is a schematic diagram of an electronic device 200 including an inductor according to an embodiment of the present invention, where the electronic device 200 includes a PCB 201 and the common mode inductor 100. The common mode inductor 100 is mounted to the PCB board 201 through the connection portions 222 of the tail connection sections 22 of the two windings 20, and is preferably mounted easily by inserting the second sections 228 of the connection portions 222 of the two windings 20 into corresponding mounting holes (not shown in the figure) of the PCB board 201. Preferably, it is understood that in other embodiments, the common mode inductor 100 may be mounted to the connector connected to the power supply through the first side arm 212 of the head connecting segments 21 of the two windings 20, so as to make the mounting of the inductor more stable. A space 202 for mounting the electronic component 203 is formed between the annular magnetic core 10 and the PCB 201, so that the space of the PCB 201 occupied by the inductor can be saved, and the utilization rate of the PCB 201 can be improved. The axial direction of the toroidal core 10 is substantially perpendicular to the PCB board 201. Although the above embodiments have been described by taking a common mode inductor as an example, those skilled in the art will appreciate that other types of inductors, such as a winding of a common inductor or a differential mode inductor, may be wound by using a plurality of connecting segments with a prefabricated shape.

The above examples merely represent preferred embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications, such as combinations of different features in various embodiments, may be made without departing from the spirit of the invention, and these are within the scope of the invention.

Claims (15)

1. An inductor comprises an annular magnetic core and a winding wound on the annular magnetic core; the method is characterized in that: the winding is formed by at least two connecting sections which are connected in sequence and surround the magnetic core, each connecting section is a flat conductor, and the flat surface of each connecting section surrounds the surface of the magnetic core.

2. The inductor of claim 1, wherein: the at least two connecting sections comprise U-shaped connecting sections, each U-shaped connecting section comprises a base arm and two side arms vertically extending from two ends of each base arm, the base arms of the U-shaped connecting sections are attached to the axial end faces of the annular magnetic cores, and the two side arms are attached to the inner side faces and the outer side faces of the annular magnetic cores respectively.

3. The inductor of claim 1, wherein: the at least two connecting sections comprise Z-shaped connecting sections, each Z-shaped connecting section comprises a Z-shaped base arm, and a first extending section and a second extending section which are connected to two ends of each Z-shaped base arm and perpendicular to the flat surface of each Z-shaped base arm, the flat surfaces of the Z-shaped base arms are attached to the outer side surfaces of the annular magnetic cores, and the first extending sections and the second extending sections are attached to two axial end surfaces of the annular magnetic cores and are welded with the adjacent connecting sections.

4. The inductor of claim 1, wherein: at least two linkage segments include an end connection section, the end connection section includes installation department and connecting portion, the installation department is the U-shaped, including a base arm and two side arms that extend perpendicularly from the base arm both ends respectively, the base arm pastes and arrives an axial terminal surface of annular magnetic core, two side arms are followed the axial extension of annular magnetic core just pastes respectively the medial surface and the lateral surface of annular magnetic core, connecting portion are the end that L shape was connected in one of them side arm, the base arm and the connecting portion of installation department are located two axial ends of annular magnetic core respectively.

5. A common mode inductor includes a toroidal core and two windings wound to a yoke portion of the toroidal core; the method is characterized in that: each winding comprises at least two connecting sections which are connected in sequence and encircle the yoke, each connecting section is a flat conductor, and the flat surface of each connecting section encircles the surface of the yoke.

6. A common-mode inductor according to claim 5, characterized in that: in the two connected connecting sections, the head end and the tail end of at least one connecting section are staggered along the length direction of the yoke part.

7. A common-mode inductor according to claim 5, characterized in that: at least one of the two connecting segments has a first part extending along the length direction of the yoke part and a second part perpendicular to the first part, and the head and the tail ends of the connecting segment are staggered along the length direction of the yoke part.

8. A common-mode inductor according to claim 5, characterized in that: the two connected connecting sections are connected through welding.

9. A common-mode inductor according to claim 5, characterized in that: the annular magnetic core is in the shape of a circular ring body, an oval ring body or a square ring body.

10. A common-mode inductor according to claim 5, characterized in that: the at least two connecting sections comprise a head connecting section, the head connecting section is U-shaped and comprises a base arm and two side arms which vertically extend from two ends of the base arm respectively; the base arm is attached to one axial end face of the yoke portion, the two side arms extend along the axial direction of the annular magnetic core and are attached to the inner side face and the outer side face of the yoke portion respectively, and one of the side arms protrudes out of the axial end face of the annular magnetic core.

11. A common-mode inductor according to claim 10, characterized in that: at least two linkage segments include a tail linkage segment, the tail linkage segment includes an installation department and connecting portion, the installation department is the U-shaped, including a base arm and two side arms that extend perpendicularly from the base arm both ends respectively, the base arm pastes and arrives another axial terminal surface of yoke portion, two side arms are followed annular magnetic core's axial extension just pastes respectively the medial surface and the lateral surface of yoke portion, connecting portion connect in the end of one of them side arm, the base arm and the connecting portion of installation department are located two axial ends of yoke portion respectively.

12. A common-mode inductor according to claim 11, characterized in that: the at least two connecting sections comprise a second connecting section and a third connecting section which are connected between the head connecting section and the tail connecting section, the second connecting section is U-shaped and comprises a base arm, a first side arm and a second side arm, the first side arm and the second side arm vertically extend from two ends of the base arm respectively, the base arm is positioned at the top end of the yoke part, the length of the first side arm is greater than that of the second side arm, the first side arm penetrates through a through hole of the annular magnetic core, the tail end of the first side arm extends out of the bottom end of the through hole, the first side arm and the second side arm are positioned on the inner side and the outer side of the yoke part respectively, and a protruding part; the third connecting section is installed on the outer side face of the yoke portion and comprises a Z-shaped base arm, a first extending section and a second extending section, wherein the first extending section and the second extending section are connected to two ends of the Z-shaped base arm and perpendicular to the flat face of the Z-shaped base arm, and the first extending section and the second extending section are respectively welded with adjacent connecting sections.

13. A common-mode inductor according to claim 12, characterized in that: the at least two linkage segments further include the fourth linkage segment, and the fourth linkage segment is the U-shaped, including a base arm and first side arm and the second side arm that extends perpendicularly from the base arm both ends, the fourth linkage segment passes through the U-shaped opening and installs in the bottom face of yoke portion from the bottom direction of annular magnetic core, the length of first side arm is greater than the length of second side arm, in first side arm inserts the through-hole of annular magnetic core, and the end of first side arm stretches out from the top of through-hole, the end of third linkage segment welding to the first side arm of fourth linkage segment, the tail linkage segment welding is to one side of the second side arm of fourth linkage segment.

14. An electronic device, comprising a PCB board, characterized in that: an inductor according to any one of claims 1-13 is provided on the PCB.

15. The electronic device of claim 14, wherein: the annular magnetic core is axially and basically perpendicular to the PCB, and a space for mounting electronic components is formed between the annular magnetic core and the PCB.

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