KR102101715B1 - Ferraite core module - Google Patents

Abstract

The present invention relates to a ferrite core module. The ferrite core module comprises: a pair of housings (10) each of which has an inner space (14) so that one side of each housing is open; and a ferrite core (C) including a conductor through hole (H) seated in the inner space (14) and surrounded by the pair of housings (10), wherein a large current conductor of positive and negative polarities penetrates through the conductor through hole. The pair of housings (10) are formed in the same shape and coupled to each other. According to the present invention, the pair of housings surround the ferrite core, wherein the housings of the same shape injection-molded from one mold are combined. Therefore, since the number of molds for manufacturing the housing is reduced, there is an effect of reducing mold costs and facilitating inventory management of parts.

Description

Ferrite core module {FERRAITE CORE MODULE}

The present invention relates to a ferrite core module, and more particularly to a compact, lightweight ferrite core module.

With the recent development of vehicle models for hybrid vehicles (HEVs) and electric vehicles (EVs), the electrical characteristics of ferrite cores applied to main transformers and output inductors of low-voltage DC-DC converters in power supplies are appropriate for vehicle operating conditions. Efforts are being made to improve.

The ferrite core is manufactured by compressing and sintering the ferrite material, and is a main voltage transformer for a low voltage DC-DC converter for a vehicle, a magnetic core used for an output inductor, that is, a magnetic force line generated by a current change of a Cu coil. It serves as a passage (magnetic core) and blocks high-frequency noise generated from electronic components. The ferrite material is an oxide-based magnetic material mainly containing manganese-zinc.

However, since the ferrite core mainly used in home appliances and communication devices has a relatively large core loss value according to the temperature change of the core, it is heated when applied to a low-voltage DC-DC converter for vehicles operating in a relatively high temperature environment. Problems with performance degradation may occur.

As a method of solving the problem, a method of expanding the size of the ferrite core may be considered, but this has a problem that does not meet the needs of consumers in the trend of miniaturization and weight reduction of automobile parts.

Republic of Korea Patent No. 10-2013-0051221

An object of the present invention is to solve the conventional problems as described above, to provide a compact, lightweight ferrite core module.

Another object of the present invention is to provide a ferrite core module that reduces the cost of the housing surrounding the ferrite core.

According to a feature of the present invention for achieving the above object, the present invention is a pair of housings composed of a first housing and a second housing having an inner space to open one side, and seated in the inner space, It is surrounded by a pair of housings, and includes a ferrite core formed with a conductor through hole through which a (+), (-) polar large current conductor passes, and the pair of housings are formed and combined with each other in the same shape.

The housing has a square base having a communication hole formed in correspondence with the conductor through hole, a pair of single walls formed on the base and facing each other, and adjacent to the single wall and facing each other to have the inner space in the base. The beam includes a pair of barriers.

The housing extends longer than the barrier in a cantilever shape from the base toward the inner space, a portion of which is formed integrally with the barrier, and a position where the bonding arm is formed on a barrier opposite to the bonding arm is formed. It includes a coupling hole formed in a place corresponding to, and the coupling protrusion protrudes toward the barrier at the tip of the coupling arm to be inserted into the coupling hole of the mating housing, and the pair of housings surround the ferrite core.

A coupling groove is formed in the housing such that a part of the barrier is recessed from the front end of the barrier to the coupling hole, and a part of the coupling arm of the relative housing is seated in the coupling groove.

A plurality of core support ribs protruding toward the interior space and extending toward the entrance of the interior space are formed on the end walls and barriers, and an inclined surface is formed at an end of the core support rib inclined toward the entrance of the interior space.

A hole support rib protrudes toward the inner space along the edge of the communication hole in the base and is in close contact with the inner surface of the conductor through hole of the ferrite core.

The ferrite core is formed by a pair of conductor through holes spaced apart in the longitudinal direction of the ferrite core.

In the ferrite core module according to the present invention, the following effects can be obtained.

According to the present invention, a pair of conductor through holes is formed in the ferrite core, and a large current conductor of (+) polarity and (−) polarity passes through the conductor through hole. This structure eliminates the need to have multiple ferrite cores to pass through each of the (+) and (-) polarities, thus reducing the size of the space occupied by the ferrite core itself and reducing the cost for manufacturing the ferrite core. There is.

According to the present invention, since the housing is formed with a hole supporting rib for supporting the conductor through hole, the shape is maintained even if the ferrite core is damaged by external force such as vibration. Therefore, even if some damage occurs to the ferrite core, the noise-blocking effect is maintained in the interior of the housing, so the noise-blocking effect is continuously maintained.

According to the present invention, a pair of housings surround the ferrite core, and the housings of the same shape injection-molded in one mold are combined. Therefore, since the number of molds for manufacturing the housing is reduced, there is an effect of reducing mold costs and facilitating inventory management of parts.

According to the present invention, several core support ribs protrude on the inner surfaces of the small and short walls of the housing. This structure manages the tolerance between the ferrite core and the housing, and provides an elastic deformation space for the coupling arm of the housing to be fastened to the coupling groove, thereby facilitating assembly of the housing and the ferrite core.

1 is a perspective view showing a state of a ferrite core module according to the present invention.
Figure 2 is an exploded perspective view of the ferrite core module constituting an embodiment of the present invention.
Figure 3 is a perspective view showing a first housing constituting an embodiment of the present invention.
4 is a perspective view of a first housing constituting an embodiment of the present invention as viewed from another angle.
Figure 5 is a cross-sectional view of the ferrite core module constituting an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. It should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing the embodiments of the present invention, when it is determined that detailed descriptions of related well-known structures or functions interfere with the understanding of the embodiments of the present invention, detailed descriptions thereof will be omitted.

In addition, in describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), and the like can be used. These terms are only for distinguishing the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to the other component, but another component between each component It should be understood that may be "connected", "coupled" or "connected".

A preferred embodiment of the ferrite core module of the present invention will be described with reference to the accompanying drawings.

First, the configuration of the ferrite core module constituting a preferred embodiment of the present invention will be described.

1 and 2, the ferrite core module of this embodiment includes a ferrite core (C) and a pair of housings (10,10 '). A pair of conductor through holes (H) is formed in the ferrite core (C), and a large current conductor of (+) polarity (not shown) and a large current conductor of (-) polarity (not shown) pass through the conductor through hole (H), respectively. do. The conductor through hole H may be formed in a shape corresponding to the cross-sectional shape of the large current conductor (not shown). The conductor through hole (H) is formed at regular intervals in the longitudinal direction of the ferrite core (C). Since the ferrite core (C) has a structure in which a large current conductor of (+) polarity (not shown) and a large current conductor of (-) polarity (not shown) pass through each of the (+) polarities and (-) polarities, There is no need to provide two ferrite cores (C). Therefore, the size of the ferrite core (C) itself and the amount of raw materials are reduced, so that the size and weight of the ferrite core module itself can be achieved.

The ferrite core (C) is coupled to the first housing 10 and the second housing (10 ') formed in a pair to surround the outer surface of the ferrite core (C). The first housing 10 and the second housing 10 'have the same shape with each other, and thus are manufactured as a single mold. Therefore, for convenience of description, the configuration of the housings 10 and 10 'will be described only in the shape of the first housing 10.

3 and 4, the first housing 10 has a flat base 11 and a short wall 12 protruding along the edge of the base 11 and a barrier 13 to form an outer shape. . The base 11, the single wall 12 and the barrier 13 are all formed integrally. The base 11 is formed in a substantially rectangular shape. The shape of the base 11 may be rectangular. The base 11 is coupled to the front and rear of the conductor through hole (H) of the ferrite core (C). A communication hole 11 'is formed in the base 11 in a shape corresponding to the conductor through hole H. The (+) polar large current conductor (not shown) and the (-) polar large current conductor (not shown) pass through the communication hole 11 '.

Since the base 11 has a substantially rectangular shape, short walls 12 and barriers 13 protruding along the edge of the base 11 are formed on short and long sides of the base 11, respectively. The single wall 12 and the barrier 13 are each formed with a pair facing each other, and the single wall 12 and the barrier 13 alternately neighbor. The single wall 12 and the barrier 13 only have a difference in length between the walls formed from the base 11, and the thickness and the material are all the same. The single wall 12 and the barrier 13 surround the edge of the ferrite core C. The edge of the ferrite core (C) is a surface adjacent to the surface where the conductor through hole (H) is formed.

An inner space 14 is formed in the housing 10 so that one side is open. A portion of the ferrite core (C) is seated in the inner space (14). That is, the inner space 14 is formed by being surrounded by the base 11, the end wall 12, and the barrier 13.

A cantilever-shaped coupling arm 15 extends toward the base 11 toward the entrance of the inner space 14. Since the coupling arm 15 is a cantilevered shape, it has elasticity. The coupling arm 15 protrudes from the edge of the base 11, a part of which is integrally formed with the barrier 13. Therefore, the coupling arm 15 extends longer than the length at which the barrier 13 protrudes. The coupling arm 15 is combined with another housing 10 to surround the ferrite core C. The coupling arm 15 may be installed on the single wall 12. However, since the coupling arm 15 may be formed relatively more in the barrier 13, it is advantageous to be formed in the barrier 13.

A coupling protrusion 15 'protrudes from the front end of the coupling arm 15. The engaging projection 15 ′ protrudes toward the barrier 13. It is suitable that the amount of protrusion of the engaging projection 15 'does not protrude to the outer surface of the housing 10. This is because if the coupling protrusion 15 'is excessively protruded, the coupling arm 15 needs a lot of space to be elastically deformed. Therefore, the projecting amount of the engaging projection 15 'can be changed in design so as to have a fastening force such that the amount of deformation of the engaging arm 15 and the engagement are not released.

A coupling hole 16 is formed in the barrier 13 opposite the coupling arm 15. The coupling hole 16 is formed at a position corresponding to the position where the coupling arm 15 is formed. The engaging projection 15 'of the other housing 10 is inserted into the engaging hole 16, and the engaging projection 15' is caught by the edge of the engaging hole 16 and is made of the first housing 10. 2 Housings 10 'are coupled to each other.

A coupling groove 16 'is formed at one side of the edge of the coupling hole 16. The coupling groove 16 ′ is formed by concave part of the barrier 13. The engaging groove 16 ′ is formed from the edge of the engaging hole 16 to the tip of the barrier 13. The coupling groove 16 ′ is accommodated in a portion of the coupling arm 15 protruding out of the barrier 13. Since the coupling groove 16 'is formed to be recessed, the thickness of the barrier 13 becomes thin, so that the amount of deformation required for the coupling arm 15 to be inserted into the coupling hole 16 is reduced. Accordingly, a space in which the coupling arm 15 can be elastically deformed is increased by the amount of indentation of the coupling groove 16 '.

A hole support rib 17 is formed in the base 11 toward the inner space 14. The hole support rib 17 is formed along the edge of the communication hole 11 '. The hole support rib 17 is inserted into the conductor through hole H of the ferrite core C to support the ferrite core C, so even if the ferrite core C is damaged by external force such as vibration Its shape is maintained. Therefore, since the shape of the ferrite core C is maintained between the first housing 10 and the second housing 10 ', noise blocking is continuously maintained.

A plurality of core support ribs 18 protrude toward the inner space 14 on the single wall 12 and the barrier 13. The core support rib 18 extends toward the entrance of the inner space 14. The core support rib 18 prevents the clearance between the ferrite core C and the first housing 10 from being caused by a tolerance generated during the molding process of the first housing 10. The core support rib 18 supports the ferrite core C in close contact with the first housing 10. In addition, the core support rib 18 allows the ferrite core C to be spaced a predetermined distance from the short wall 12 and the barrier 13 to provide a space in which the coupling arm 15 can be elastically deformed. At this time, the protruding amount of the core support rib 18 may be determined according to the indentation amount of the engaging groove 16 'and the size of the ferrite core C.

An inclined surface 18 ′ is formed at the tip of the core support rib 18. The inclined surface 18 ′ is formed to be inclined toward the entrance of the inner space 14 to guide the ferrite core C to be seated on the core support rib 18. In addition, the assembly of the first housing 10 and the ferrite core C prevents the ferrite core C from being damaged by the core support rib 18.

Next, an assembly process of a ferrite core module constituting a preferred embodiment of the present invention will be described.

The ferrite core C is disposed between the first housing 10 and the second housing 10 '. At this time, the first housing 10 and the second housing 10 'have the same shape, and the inner space 14 is disposed to face the ferrite core C. In addition, the coupling arms 15 of the first housing 10 and the second housing 10 'are positioned parallel to each other but not facing each other. Thus, the pair of housings 10, 10 'and the ferrite core C are arranged as shown in FIG.

The pair of housings 10 and 10 'move toward the ferrite core C, and the engaging projection 15' contacts the engaging groove 16 '. The engaging projection 15 'is seated in the engaging groove 16', elastic deformation occurs in the engaging arm 15, and the deformed state is maintained.

At this time, the coupling arm 15 is elastically deformed in the space between the ferrite core C formed by the core support rib 18 and the coupling groove 16 '. The engaging groove 16 'is formed by being recessed from the barrier 13, and the core support rib 18 supports the ferrite core C, so that the height of the core supporting rib 18 and the engaging groove ( The amount of indentation of 16 ') becomes the size of a space in which the coupling arm 15 can be elastically deformed.

When the pair of housings 10 and 10 'are closer, the hole supporting ribs 17 are inserted into both sides of the conductor through hole H, and the edge of the edge of the ferrite core C is the inclined surface ( 18 ') and seats on the core support ribs 18.

Referring to FIG. 5, when the engaging projection 15 'is inserted into the engaging hole 16 past the engaging groove 16', the engaging projection 15 'is at the edge of the engaging hole 16. The ferrite core module is completed. The hole support ribs 17 completely cover the inner surface of the conductor through hole H by contacting each other at the ends thereof.

In the ferrite core module, a large current conductor (not shown) of positive polarity (not shown) and a large current conductor (not shown) of negative polarity pass through the conductor through hole H in which the hole support rib 17 is inserted, respectively. When the current flows through the conductor, the ferrite core module becomes a passage of magnetic force lines constituting a magnetic field formed around the conductor, and blocks noise generated while the high voltage drops to a low voltage.

In the above, even if all the components constituting the embodiment according to the present invention are described as being combined or operated as one, the present invention is not necessarily limited to these embodiments. That is, if it is within the scope of the present invention, all of the components may be selectively combined and operated. In addition, the terms "include", "consist" or "have" as described above mean that the corresponding component can be intrinsic, unless specifically stated to the contrary, excluding other components. It should not be interpreted as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as generally understood by a person skilled in the art to which the present invention pertains, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted as being consistent with the contextual meaning of the related art, and are not to be interpreted as ideal or excessively formal meanings unless explicitly defined in the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the claims below, and all technical spirits within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

C: Ferrite core H: Conductor through hole
10: 1st housing 10 ': 2nd housing
11: Base 11 ': Communication Hall
12: single wall 13: barrier
14: internal space 15: combined arm
15 ': engaging projection 16: engaging hole
16 ': Coupling groove 17: Hole support rib
18: Core support rib 18 ': Slope

Claims (7)

A first housing and a second housing that provide an interior space while one side of the open side faces each other;
A ferrite core seated in the interior space, surrounded by the two housings, and having a conductor through hole through which a large current conductor passes,
A ferrite core module, characterized in that at least one core support rib is formed on the circumferential inner wall surface of the first housing and the second housing while protruding toward the ferrite core of the inner space and contacting the circumferential surface of the ferrite core.
The method of claim 1, wherein the first housing and the second housing are formed in the same shape as each other and are coupled to each other,
The first housing and the second housing
A square base having a communication hole formed to correspond to the conductor through hole,
A pair of short walls formed on the base and facing each other,
The ferrite core module, characterized in that it comprises a pair of barriers facing each other so as to have the inner space on the base and adjacent to the single wall.
The method of claim 2, wherein the first housing and the second housing is formed with a coupling arm extending from the barrier to protrude outside the interior space,
In the other barrier of the first housing and the second housing, a coupling hole to which the coupling arm is coupled is formed,
A ferrite core module characterized in that the two housings surround the ferrite core while the coupling protrusion protrudes toward the barrier and is inserted into the coupling hole of the opposite housing at the tip of the coupling arm.
According to claim 3, The two housings are formed with a coupling groove formed by indenting a part of the barrier from the tip of the barrier to the coupling hole, so that a part of the coupling arm of the opposite housing is seated in the coupling groove. Ferrite core module, characterized in that.
The method according to claim 2, wherein the core support ribs are provided in plural and formed on the short walls and barriers, respectively.
Ferrite core module, characterized in that the inclined surface is formed toward the entrance of the inner space at the tip of the core support rib.
A first housing and a second housing that provide an interior space while one side of the open side faces each other;
A ferrite core seated in the inner space, surrounded by the two housings, and having a conductor through hole through which a large current conductor passes;
Ferrite core module characterized in that it comprises a hole support rib that is in close contact with the inner surface of the conductor through-hole while protruding from each housing toward the conductor through-hole of the ferrite core.
The ferrite core module according to any one of claims 1 to 6, wherein the ferrite core is formed to be spaced apart from each other in the longitudinal direction of the ferrite core while providing a pair of conductor through holes.

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