CN213424759U

CN213424759U - Common mode inductor

Info

Publication number: CN213424759U
Application number: CN202022818836.6U
Authority: CN
Inventors: 朱政权; 时伟光; 李敏方; 王永全
Original assignee: Friendship Nano Crystal Technology Co ltd
Current assignee: Friendship Nano Crystal Technology Co ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-06-11
Anticipated expiration: 2030-11-30

Abstract

The utility model relates to an inductor technical field discloses a common mode inductor, including first UF magnetic core and second UF magnetic core, first UF magnetic core and second UF magnetic core middle part all are equipped with the spliced pole, the spliced pole outer wall solderless wrapped connection has flat coil, flat coil bottom fixedly connected with PCB bottom plate, the fixed orifices has been seted up to PCB bottom plate upper surface, first UF magnetic core and second UF magnetic core bond through glue to one side relatively. In the utility model, the deformation is added on the original U-shaped structure, the winding turns are reduced by a larger magnet area to ensure better inductance characteristic, and meanwhile, the magnetic leakage of the winding can be reduced, and the EMI problem of the product to other devices is reduced; the flat coil is used for increasing the winding performance and the heat dissipation area, larger current can be passed, the first UF magnetic core and the second UF magnetic core are in a square shape after being assembled, and the connecting column forms a mirror surface through precision machining so as to improve the inductance and EMI performance and solve the problem of stress of the flat coil on the magnetic core through exposure and heat dissipation.

Description

Common mode inductor

Technical Field

The utility model belongs to the technical field of the inductor, specifically be a common mode inductor.

Background

An inductor is a component that can convert electrical energy into magnetic energy for storage. The inductor is similar in structure to a transformer, but has only one winding. The inductor has an inductance that only impedes the change in current. If the inductor is in a state where no current is passing, it will try to block the current from flowing through it when the circuit is on; if the inductor is in a current passing state, the inductor will try to keep the current unchanged when the circuit is opened. Inductors are also called chokes, reactors and dynamic reactors;

currently, electronic devices are continuously moving toward smaller size, higher integration, and higher efficiency. Common mode inductors are a key component in electronic devices, and their size and weight are becoming smaller and lighter.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: to solve the problem that electronic devices are continuously developed toward smaller size, higher integration and higher efficiency. The common mode inductor is a key component in electronic equipment, and the common mode inductor has a problem that the size is smaller, the weight is lighter and the direction of the technical personnel is pursued.

The utility model adopts the technical scheme as follows: the common mode inductor comprises a first UF magnetic core and a second UF magnetic core, wherein connecting posts are arranged in the middle of the first UF magnetic core and the middle of the second UF magnetic core, flat coils are wound on the outer walls of the connecting posts, a PCB bottom plate is fixedly connected to the bottoms of the flat coils, fixing holes are formed in the upper surface of the PCB bottom plate, and one opposite sides of the first UF magnetic core and the second UF magnetic core are bonded through glue.

In a preferred embodiment, the first UF core and the second UF core are assembled to have a "square" shape.

In a preferred embodiment, the flat coil is provided with two lead-out wires, and the two lead-out wires are respectively arranged in the two fixing holes.

In a preferred embodiment, the flat coil is wound by a flat wire vertical winding machine, so that the high-current work can be realized, the assembly process is easy, the automatic operation is realized, a frameless mode can be used for winding the coil by using the flat coil, meanwhile, the direct exposed heat dissipation of the flat coil can reduce the wire diameter of the winding, the temperature of the winding and the magnetic core is balanced, and the EMI problem of the product on other devices is reduced.

In a preferred embodiment, the flat coil and the PCB chassis are fixedly connected by glue.

In a preferred embodiment, the outer surface of the connecting column is processed into a mirror surface to improve the inductance and the EMI resistance, and the stress problem of the flat coil on the magnetic core through the exposed heat dissipation can be solved, and the wire diameter of the winding can be reduced, and the temperature of the winding and the temperature of the magnetic core can be balanced.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. in the utility model, the deformation is added on the original U-shaped structure, the winding turns are reduced by a larger magnet area to ensure better inductance characteristic, and meanwhile, the magnetic leakage of the winding can be reduced, and the EMI problem of the product to other devices is reduced; the flat coil is used for increasing the flexibility, increasing the heat dissipation area, and allowing larger current to pass, and the novel common-mode inductor has a simple structure, is suitable for batch production, and has higher industrial value and market competitiveness.

2. The utility model discloses in, be "mouth" style of calligraphy after first UF magnetic core and the equipment of second UF magnetic core, the spliced pole forms the mirror surface through precision finishing to improve inductance and EMI performance, through exposing heat dissipation flat coil to magnetic core stress problem, can reduce winding line footpath simultaneously, balanced winding and magnetic core temperature reduce the EMI problem of product itself to other devices.

Drawings

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

fig. 2 is a schematic structural diagram of a UF magnetic core in the common mode inductor according to the present invention;

fig. 3 is a schematic structural diagram of a flat coil in a common mode inductor according to the present invention;

fig. 4 is a schematic structural diagram of a PCB bottom plate in the common mode inductor according to the present invention.

The labels in the figure are: 1-first UF magnetic core, 2-second UF magnetic core, 3-connecting column, 4-flat coil, 5-PCB bottom plate and 6-fixing hole.

Detailed Description

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-4, a common mode inductor, comprising a first UF magnetic core 1 and a second UF magnetic core 2, the first UF magnetic core 1 and the second UF magnetic core 2 are assembled to be a square structure, the middle parts of the first UF magnetic core 1 and the second UF magnetic core 2 are respectively provided with a connection post 3, the outer surface of the connection post 3 is processed to be a mirror surface to improve the inductance and the EMI resistance, the outer wall of the connection post 3 is wound with a flat coil 4, the flat coil 4 is wound by a flat wire vertical winding machine, the large current can work, the assembly process is easy and suitable for automatic operation, the winding of the coil by using the flat coil 4 can use a frameless mode, meanwhile, the winding wire diameter can be reduced by directly exposing the flat coil 4 for heat dissipation, the temperature of the winding and the magnetic core is balanced, the EMI problem of the product on other devices is reduced, a PCB bottom plate 5 is fixedly connected to the bottom of the flat coil 4, fixing holes 6 are formed in the upper surface of the PCB bottom plate 5, the flat coil 4 is provided with two outgoing lines which are respectively arranged in the two fixing holes 6, and one opposite sides of the first UF magnetic core 1 and the second UF magnetic core 2 are bonded through glue.

In the common mode inductor, the magnetic core adopts the UF magnetic core, the UF magnetic core has higher initial magnetic conductance and good broadband characteristic, the number of turns of the winding and the product volume can be effectively reduced, a frameless mode can be used for winding the coil by using the flat coil 4, meanwhile, the wire diameter of the winding can be reduced by directly exposing and radiating the flat coil 4, the temperature of the winding and the magnetic core is balanced, the EMI problem of the product per se to other devices is reduced, and the winding is wound by using the flat coil to realize better automation; in conclusion, the product has the advantages of strong frequency characteristic, good heat dissipation performance and high EMI performance, the first UF magnetic core 1 and the second UF magnetic core 2 are in a square shape after being assembled, the connecting column 3 forms a mirror surface through precision machining, so that the inductance and the EMI performance are improved, the stress problem of the exposed heat dissipation flat coil 4 on the magnetic cores can be solved, the wire diameter of the winding can be reduced, the temperatures of the winding and the magnetic cores can be balanced, and the EMI problem of the product on other devices can be reduced.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A common mode inductor comprising a first UF-core (1) and a second UF-core (2), characterized in that: the UF magnetic core comprises a first UF magnetic core (1) and a second UF magnetic core (2), wherein connecting columns (3) are arranged in the middle of the first UF magnetic core (1) and the second UF magnetic core (2), flat coils (4) are wound on the outer walls of the connecting columns (3), a PCB bottom plate (5) is fixedly connected to the bottoms of the flat coils (4), fixing holes (6) are formed in the upper surface of the PCB bottom plate (5), and one sides, opposite to the first UF magnetic core (1) and the second UF magnetic core (2.

2. A common mode inductor as claimed in claim 1, wherein: the first UF magnetic core (1) and the second UF magnetic core (2) are assembled to form a square structure.

3. A common mode inductor as claimed in claim 1, wherein: the flat coil (4) is provided with two outgoing lines which are respectively arranged in the two fixing holes (6).

4. A common mode inductor as claimed in claim 1, wherein: the flat coil (4) is wound by a flat wire vertical winding machine.

5. A common mode inductor as claimed in claim 1, wherein: the flat coil (4) is fixedly connected with the PCB bottom plate (5) through glue.

6. A common mode inductor as claimed in claim 1, wherein: the outer surface of the connecting column (3) is processed into a mirror surface.