Integrated noise filter

Abstract

An integrated noise filter according to an embodiment of the present invention may comprise: a bus bar unit transmitting power and an electrical signal; a case unit accommodating and covering at least a portion of the bus bar unit; at least one core unit covering a portion of the outer surface of the bus bar unit and imparting inductance to the bus bar unit; and at least one power storage unit electrically connected to the bus bar unit and imparting capacitance to the bus bar unit.

Description

Integrated noise filter

[0001] The present invention relates to an integrated noise filter, and more particularly, to an integrated noise filter that removes electromagnetic interference (EMI) and is integrated with a connector.

[0002] In order to improve the quality of power supplied to electronic devices and ensure stable operation of the devices, the importance of filters to remove or minimize electromagnetic interference (EMI) noise is continuously increasing.

[0003] In particular, in the mobility sector, hybrid vehicles (HEVs), plug-in hybrid vehicles (PHEVs), electric vehicles (EVs), and fuel cell vehicles (FCEVs) are attracting attention as future eco-friendly vehicles that will replace fossil fuel-powered vehicles.

[0004] Various types of power conversion devices are used in electric vehicles, which are currently being actively commercialized. For example, an on-board charger (OBC) can be used to charge a high-voltage battery from an external source. Another example is a low-voltage DC-DC converter (LDC) to convert power from a high-voltage battery to a low-voltage battery (e.g., a 12V low-voltage battery).

[0005] During the process of charging a high-voltage battery from the outside or converting power from a high-voltage battery to a low-voltage battery, electromagnetic interference noise may be generated, maintained, and amplified. Such electromagnetic interference noise may affect power transmission and supply, and may cause malfunctions in loads that receive power (e.g., headlights, wipers, ECUs, etc. that are driven by power supplied from a low-voltage battery).

[0006] To address these issues, conventional technology has separately equipped and connected connectors, differential mode filters (DM filters), and common mode filters (CM filters) to eliminate incoming or outgoing electromagnetic interference noise. However, due to the high current, the connectors, differential mode filters, and common mode filters are connected using busbars and grounding, which increases the likelihood of power loss and noise at the connection points.

[0007] In addition, a filter structure that removes electromagnetic interference noise (e.g., common mode noise) by using a frame ground (FG) rather than a differential mode filter has been proposed, but there is a continuous demand for a filter structure that enables more effective noise removal.

[0008] To solve the above-mentioned problem, the disclosed embodiment of the present invention provides an integrated noise filter capable of minimizing electromagnetic interference noise introduced from outside or generated from equipment.

[0009] In addition, the disclosed embodiment of the present invention provides an integrated noise filter that is integrated and miniaturized, thereby improving assembly and stability and miniaturizing the overall power conversion device.

[0010] Additionally, an embodiment of the present invention provides an integrated noise filter optimized for electromagnetic interference noise by customizing it according to the specifications of the target product.

[0011] The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0012] In order to solve the above-mentioned problem, an integrated noise filter according to a disclosed embodiment of the present invention may include a busbar unit for transmitting power and an electric signal, a case unit for accommodating and covering at least a portion of the busbar unit, at least one core unit for covering a portion of an outer surface of the busbar unit and imparting inductance to the busbar unit, and at least one storage unit electrically connected to the busbar unit and imparting capacitance to the busbar unit.

[0013] In addition, the busbar unit may include a first input / output terminal electrically connected to the outside, and a second input / output terminal formed opposite to the first input / output terminal and electrically connected to a load.

[0014] In addition, the busbar unit further includes a busbar step portion that forms a step between the first input / output terminal and the second input / output terminal, and a first bending distance from the busbar step portion to the end of the first input / output terminal can be formed to be shorter than a second bending distance from the busbar step portion to the end of the second input / output terminal.

[0015] In addition, the busbar unit further includes a busbar branch portion formed to protrude a predetermined length from one side of the busbar body including the first input / output terminal and the second input / output terminal, and at least a portion of the busbar branch portion may be formed to extend in a direction from the second input / output terminal toward the first input / output terminal.

[0016] In addition, the core unit includes a first core unit that applies a first inductance to the busbar unit, and a second core unit that applies a second inductance to the busbar unit, and the first core unit and the second core unit can be spaced apart from each other by the busbar branch portion.

[0017] Additionally, the first core unit and the second core unit form a concentric structure, and each of the first core unit and the second core unit can be formed spaced apart from the busbar unit.

[0018] Additionally, the case unit may include a first busbar unit receiving portion that receives the first input / output terminal of the busbar unit, and a second busbar unit receiving portion that receives the second input / output terminal of the busbar unit.

[0019] Additionally, the first busbar unit receiving portion and the second busbar unit receiving portion may be formed with openings in directions corresponding to different axes.

[0020] In addition, the case unit further includes a core unit receiving portion that receives the at least one core unit such that the center of the at least one core unit corresponds to the axial center of the busbar unit, and the core unit receiving portion may be formed with an opening corresponding to the same axis as the second busbar unit receiving portion.

[0021] In addition, the case unit further includes a storage unit receiving portion that receives at least one storage unit, and the storage unit receiving portion may be formed with an opening in a direction corresponding to the same axis as the first busbar unit receiving portion, and may be formed with an opening in a direction corresponding to a different axis from the second busbar unit receiving portion.

[0022] Additionally, the storage unit receiving portion may be formed with an opening in a direction opposite to the first bus bar unit receiving portion.

[0023] In addition, it further includes a pair of grounding units that are electrically connected to at least a portion of the busbar unit to form a ground, and a first grounding unit of the pair of grounding units is electrically connected to the busbar branch portion by both ends of a first storage unit of the at least one storage unit to form a first grounding path, and a second grounding unit of the pair of grounding units is electrically connected to a first input / output terminal fastening unit that is fastened to the first input / output terminal of the busbar unit by both ends of a second storage unit of the at least one storage unit and protrudes to one side to form a second grounding path.

[0024] In addition, the case unit may further include a pair of grounding unit receiving portions that are formed with an opening in a direction corresponding to the same axis as the second busbar unit receiving portion that receives the second input / output terminal of the busbar unit and that receive the pair of grounding units, respectively.

[0025] In addition, it further includes a pair of grounding units electrically connected to at least a portion of the busbar unit to form a ground, and a first grounding unit of the pair of grounding units is electrically connected to one end of a capacitor connection unit that is fixed to the first input / output terminal of the busbar unit by a first input / output terminal fastening unit through both ends of a first capacitor unit of the at least one capacitor unit to form a first grounding path, and a second grounding unit of the pair of grounding units is electrically connected to the other end of the capacitor connection unit through both ends of a second capacitor unit of the at least one capacitor unit to form a second grounding path.

[0026] Additionally, the at least one core unit may be molded after being accommodated in the case unit, and a ring-shaped elastic member may be disposed between a portion of the inner surface of the case unit and the molded outer surface of the at least one core unit.

[0027] According to the proposed embodiment, there is an advantage in that bidirectional input / output noise is reduced by minimizing electromagnetic interference noise coming from the outside or generated from equipment through an integrated noise filter according to the disclosed embodiment of the present invention.

[0028] In addition, there is an advantage in that, through the integrated noise filter according to the disclosed embodiment of the present invention, a power conversion device including the integrated noise filter can be miniaturized, and an electronic product including the power conversion device can also be miniaturized.

[0029] In addition, there is an advantage in that the integrated noise filter according to the disclosed embodiment of the present invention can efficiently reduce electromagnetic interference noise by customizing the inductance and / or capacitance according to the specifications of the target product.

[0030] FIG. 1 is a diagram for explaining a state in which an integrated noise filter according to a disclosed embodiment of the present invention is coupled to a load, etc.

[0031] FIG. 2 is a perspective view of an integrated noise filter according to one disclosed embodiment of the present invention.

[0032] FIG. 3 is a bottom view of an integrated noise filter according to one disclosed embodiment of the present invention.

[0033] FIG. 4 is a front view of an integrated noise filter according to one disclosed embodiment of the present invention.

[0034] FIG. 5 is a circuit diagram showing the configuration of elements between the first input / output terminal and the second input / output terminal in an integrated noise filter according to one disclosed embodiment of the present invention.

[0035] FIG. 6 is a schematic flowchart of a method for manufacturing an integrated noise filter according to one disclosed embodiment of the present invention.

[0036] FIGS. 7 to 15 are drawings for explaining a method of manufacturing an integrated noise filter according to an embodiment of the present invention.

[0037] FIG. 16 is a perspective view of an integrated noise filter according to another disclosed embodiment of the present invention.

[0038] FIG. 17(a) is a top view of an integrated noise filter according to another disclosed embodiment of the present invention, and FIG. 17(b) is a bottom view of an integrated noise filter according to another disclosed embodiment of the present invention.

[0039] FIG. 18 is a front view of an integrated noise filter according to another disclosed embodiment of the present invention.

[0040] FIG. 19 is an exploded perspective view of an integrated noise filter according to another disclosed embodiment of the present invention.

[0041] [Explanation of symbols]

[0042] 1, 2: Integrated noise filter

[0043] 100: Busbar unit 200: Case unit

[0044] 300: Core Unit 400: Storage Unit

[0045] 500: Grounding unit 600: First input / output terminal connection unit

[0046] 700, 700': Capacitor connection unit 800: Elastic member

[0047] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms. These embodiments are provided solely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined solely by the scope of the claims.

[0048] Although terms like "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, it should be understood that the "first" component referred to below may also be a "second" component within the technical scope of the present invention.

[0049] Identical reference numerals throughout the specification refer to identical components.

[0050] The individual features of the various embodiments of the present invention can be partially or wholly combined or combined with each other, and as can be fully understood by those skilled in the art, various technical connections and operations are possible, and each embodiment can be implemented independently of each other or can be implemented together in a related relationship.

[0051] Meanwhile, the tentative effects that can be expected by the technical features of the present invention that are not specifically mentioned in the specification of the present invention are treated as described in the specification, and the present embodiment is provided to more completely explain the present invention to a person having average knowledge in the art, and the contents shown in the drawings may be expressed exaggeratedly compared to the actual implementation of the invention, and a detailed description of a configuration that is judged to unnecessarily obscure the gist of the present invention is omitted or briefly described.

[0052] Hereinafter, the disclosed embodiments of the present invention will be described in detail with reference to the attached drawings.

[0053]

[0054] FIG. 1 is a diagram for explaining a state in which an integrated noise filter (1) according to a disclosed embodiment of the present invention is coupled to a load (1000), etc.

[0055] Referring to Fig. 1, an integrated noise filter (1) according to a disclosed embodiment of the present invention can be connected and coupled to one side of a load (1000). In Fig. 1, the load (1000) is schematically represented, but may be a component that receives power. For example, the load (1000) may be at least one of electric vehicle components, such as a headlight, wiper, or ECU, that receives power from a low-power battery of the electric vehicle.

[0056] The integrated noise filter (1) according to the disclosed embodiment of the present invention can perform the function of a filter that filters noise. In addition, the integrated noise filter (1) according to the disclosed embodiment of the present invention can also simultaneously perform the function of a connector that connects between any load(s) and other load(s), between a high-voltage battery and a low-voltage battery, or between a low-voltage battery and load(s). That is, the integrated noise filter (1) according to the disclosed embodiment of the present invention can be understood as an integrated noise filter and a connector.

[0057]

[0058] Below, detailed components of the integrated noise filter (1) according to the disclosed embodiment of the present invention are described in detail.

[0059] FIG. 2 is a perspective view of an integrated noise filter (1) according to a disclosed embodiment of the present invention, FIG. 3 is a bottom view of an integrated noise filter (1) according to a disclosed embodiment of the present invention, and FIG. 4 is a front view of an integrated noise filter (1) according to a disclosed embodiment of the present invention.

[0060] Referring to FIGS. 1 to 4, an integrated noise filter (1) according to an embodiment of the present invention may include a busbar unit (100). The busbar unit (100) may be formed of an electrically conductive material and may serve to transmit power and an electrical signal. The busbar unit (100) may transmit power in one direction or two directions to supply electrical energy to a load requiring power, and may transmit an electrical signal in one direction or two directions to cause a specific component to operate and / or be controlled. For example, the busbar unit (100) may be copper-plated, but the method of forming the busbar unit (100) is not limited to the above-described example.

[0061] Both ends of the busbar unit (100) may be electrically connected to the outside and / or a load, but if the busbar unit (100) is entirely exposed, the busbar unit (100) may be affected by the external environment (e.g., impedance change), and noise generation, noise amplification, signal distortion, and power loss may occur. In order to minimize such influence by the external environment, the integrated noise filter (1) according to the disclosed embodiment of the present invention may include a case unit (200). The case unit (200) may accommodate and cover at least a portion of the busbar unit (100). For example, the case unit (200) may accommodate and cover the remaining portions of the busbar unit (100) except for a portion of both ends. Accordingly, the case unit (200) may minimize the influence of the busbar unit (100) on the external environment. The detailed structure of the case unit (200) will be described later.

[0062] Meanwhile, in order to remove noise from the power, signal, and / or radiant noise transmitted by the busbar unit (100), a predetermined inductance (L) may be applied to the busbar unit (100). The integrated noise filter (1) according to the disclosed embodiment of the present invention may include at least one core unit (300), and the at least one core unit (300) may cover a portion of the outer surface of the busbar unit (100) and may impart inductance to the busbar unit (100). The at least one core unit (300) may have a ring shape, and at least a portion of the busbar unit (100) may penetrate the interior of a communication hole formed in communication with the at least one core unit (300). For example, at least one core unit (300) may be a magnetic material having an electromagnetic force, and the power, signal, and radiation noise transmitted through the busbar unit (100) may be reduced by the electromagnetic force applied to the busbar unit (100) by the at least one core unit (300).

[0063] In addition, in order to remove noise from the power and signal transmitted by the busbar unit (100), a predetermined capacitance (C) may be applied to the busbar unit (100). The integrated noise filter (1) according to the disclosed embodiment of the present invention may include at least one storage unit (400), and the at least one storage unit (400) may be electrically connected to the busbar unit (100) and may provide a capacitance to the busbar unit (100). For example, the at least one storage unit (400) may be a Y capacitor for an EMC filter, but is not necessarily limited to the disclosed example. Power noise, signal noise, and radiated noise transmitted through the busbar unit (100) may be reduced by the capacitance provided to the busbar unit (100) by the at least one storage unit (400).

[0064]

[0065] Below, the structure of the integrated noise filter (1) according to the disclosed embodiment of the present invention from a circuit perspective is described.

[0066] FIG. 5 is a circuit diagram showing the configuration of elements between the first input / output terminal (111) and the second input / output terminal (112) in an integrated noise filter (1) according to one disclosed embodiment of the present invention.

[0067] Referring to FIGS. 2 to 5 (particularly, FIG. 5), in an integrated noise filter (1) according to a disclosed embodiment of the present invention, a busbar unit (100) may form a path for power and / or signals to travel. For example, in the integrated noise filter (1), both ends of the busbar unit (100) may be electrically connected to the outside and / or a load. For example, one end of the busbar unit (100) may be electrically connected to the outside, and the other end opposite to one end of the busbar unit (100) may be electrically connected to a load.

[0068] At this time, at least one core unit (300) that provides a predetermined inductance (L) between both ends of the busbar unit (100) and at least one capacitor unit (400) that provides a predetermined capacitance (C) between both ends of the busbar unit (100) can be arranged.

[0069] For example, in an integrated noise filter (1) according to the disclosed embodiment of the present invention, a first core unit (310) included in at least one core unit (300) can provide a first inductance (L1) to a busbar unit (100), and a second core unit (320) included in at least one core unit (300) can provide a second inductance (L2) to the busbar unit (100).

[0070] In addition, by way of example, in the integrated noise filter (1) according to the disclosed embodiment of the present invention, a first capacitor unit (410) included in at least one capacitor unit (400) can provide a first capacitance (C1) to the busbar unit (100), and a second capacitor unit (420) included in at least one capacitor unit (400) can provide a second capacitance (C2) to the busbar unit (100).

[0071] In this way, power noise, signal noise, and radiation noise transmitted through the busbar unit (100) can be controlled and effectively reduced by the inductances (L1, L2) and capacitances (C1, C2) provided to the busbar unit (100).

[0072] For example, the first inductance (L1) of the first core unit (310) may be 0.04 μH, and the second inductance (L2) of the second core unit (320) may be 0.32 μH. In addition, the first capacitance (C1) of the first storage unit (410) may be 4.7 μF, and the second capacitance (C2) of the second storage unit (420) may be 4.7 μF. However, the values ​​of the first inductance (L1) of the first core unit (310), the second inductance (L2) of the second core unit (320), the first capacitance (C1) of the first storage unit (410), and the second capacitance (C2) of the second storage unit (420) are exemplary, and suitable values ​​of the core unit (300) and the storage unit (400) can be used to effectively reduce noise in a device to which the integrated noise filter (1) according to the disclosed embodiment of the present invention is applied.

[0073]

[0074] Below, a process for manufacturing an integrated noise filter (1) according to the disclosed embodiment of the present invention is described.

[0075] FIG. 6 is a schematic flowchart of a method for manufacturing an integrated noise filter (1) according to one disclosed embodiment of the present invention, and FIGS. 7 to 15 are drawings for explaining a method for manufacturing an integrated noise filter (1) according to one disclosed embodiment of the present invention.

[0076] Referring to FIG. 6, a method for manufacturing an integrated noise filter (1) according to an embodiment of the present invention may include a busbar unit arrangement step (S110), a case unit bonding step (S120), a capacitor unit bonding step (S130), a first molding step (S140), a second molding step (S150), an elastic member insertion step (S160), a second core unit insertion step (S170), and a third molding step (S180).

[0077] As illustrated in FIGS. 6 and 7, a busbar unit (100) may be prepared in a busbar unit arrangement step (S110). In some embodiments, the busbar unit (100) may include a busbar branch portion (120), and a first core unit (310) among at least one core unit (300) may be arranged on one side of the busbar branch portion (120).

[0078] Thereafter, as illustrated in FIGS. 6 and 8, a pair of grounding units (500) may be arranged adjacent to the busbar unit (100). The pair of grounding units (500) may form a grounding path along which noise included in power and / or signals transmitted through the busbar unit (100) travels. At least some of the pair of grounding units (500) may be arranged adjacent to the busbar branch portion (120) of the busbar unit (100), and the remaining some of the pair of grounding units (500) may be arranged adjacent to the capacitor connection unit (700) arranged at one end of the busbar unit (100).

[0079] Thereafter, as illustrated in FIGS. 6 and 9, in the case unit combining step (S120), the busbar unit (100) may be covered by the case unit (200). For example, the case unit (200) may be manufactured by insert injection molding using a plastic material, but is not necessarily limited to the injection molding method.

[0080] As illustrated in FIGS. 6 and 10, at least one storage unit (400) may be coupled to the busbar unit (100) to electrically connect the busbar unit (100) and a pair of grounding units (500) in the storage unit coupling step (S130). For example, one end of a first storage unit (410) among the at least one storage unit (400) may be coupled to the busbar branch portion (120), the other end of the first storage unit (410) may be coupled to the first grounding unit (510) among the pair of grounding units (500), and each of the two ends of the first storage unit (410) may be soldered to the busbar branch portion (120) and the first grounding unit (510). As another example, one end of a second capacitor unit (420) among at least one capacitor unit (400) is connected to a capacitor connection unit (700), the other end of the second capacitor unit (420) is connected to a second grounding unit (520) among a pair of grounding units (500), and each of the two ends of the second capacitor unit (420) can be soldered to the capacitor connection unit (700) and the second grounding unit (520).

[0081] As illustrated in FIGS. 6 and 11, in the first molding step (S140), a portion of the case unit (200) in which at least one storage unit (400) is accommodated may be molded. Accordingly, at least one storage unit (400) may be protected from the external environment by the first molding step (S140).

[0082] As illustrated in FIGS. 6 and 12, in the second molding step (S150), a portion of the case unit (200) in which the busbar unit (100) is accommodated may be molded. Accordingly, the remaining portion of the busbar unit (100) other than both ends may be protected from the external environment by the second molding step (S150).

[0083] As illustrated in FIGS. 6 and 13, an elastic member (800) may be inserted and placed in the elastic member insertion step (S160). For example, the elastic member (800) may be placed on the inner surface of the case unit (200), and has the advantage of minimizing the clearance so that components placed inside the case unit (200) are properly positioned.

[0084] As illustrated in FIG. 6 and FIG. 14, in the second core unit insertion step (S170), at least one of the core units (300) may be inserted as a second core unit (320). More specifically, the second core unit (320) may be placed inside the case unit (200) in which the busbar unit (100) is placed, and accordingly, the second core unit (320) may provide a second inductance (L2) to the busbar unit (100).

[0085] As illustrated in FIG. 6 and FIG. 15, the second core unit (320) can be molded in the third molding step (S180). That is, the second core unit (320) can be molded and fixed in the third molding step (S180) so as not to be detached to the outside. Meanwhile, the outer surface of the molded portion in the third molding step (S180) can be in contact with the elastic member (800) described above. Accordingly, the second core unit (320) can be positioned correctly, and the molded portion can be in contact with the elastic member (800) to implement a stable and miniaturized noise filter structure.

[0086]

[0087] Hereinafter, detailed components of the integrated noise filter (1) according to the disclosed embodiment of the present invention will be described by selectively referring to drawings for explaining the manufacturing method of the integrated noise filter (1) described above.

[0088] Referring to FIG. 7, the busbar unit (100) of the integrated noise filter (1) according to the disclosed embodiment of the present invention may include a busbar body (110). The busbar body (110) may serve to transmit power and / or signals. Both ends of the busbar body (110) may be connected to a component that supplies power (e.g., a low-power battery) and a load, respectively.

[0089] More specifically, the busbar unit (100) may include a first input / output terminal (111) and a second input / output terminal (112), and the first input / output terminal (111) and the second input / output terminal (112) may constitute both ends of the busbar body (110) of the busbar unit (100).

[0090] The first input / output terminal (111) can be electrically connected to the outside, and the second input / output terminal (112) can be electrically connected to a load. To achieve this connection, the second input / output terminal (112) can be formed opposite the first input / output terminal (111). Power and signals can be transmitted in one direction or two directions through the first input / output terminal (111) and the second input / output terminal (112), and thus, operation according to power supply and control signal transmission to the load is possible.

[0091] If necessary, the busbar unit (100) may further include a busbar step portion (113). The busbar step portion (113) may form a step between the first input / output terminal (111) and the second input / output terminal (112). The busbar step portion (113) may be formed so as not to excessively deform the electrical characteristics of the busbar unit (110) and prevent mechanical defects from occurring, and the bending angle at which the busbar step portion (113) is bent may be an acute angle or a right angle. The bending structure of the busbar unit (100) and the busbar body (110) by the busbar step portion (113) has the advantage of shortening the longitudinal direction (for example, the direction corresponding to the x-axis in the busbar unit (100) illustrated in FIG. 7) of the integrated noise filter (1) according to the disclosed embodiment of the present invention, and miniaturizing the integrated noise filter (1).

[0092] Meanwhile, the busbar step portion (113) may be formed at a position closer to the first input / output terminal (111) in the busbar body (110). For example, the first bending distance (d1) from the busbar step portion (113) to the end of the first input / output terminal (111) may be formed shorter than the second bending distance (d2) from the busbar step portion (113) to the end of the second input / output terminal. In this case, the first bending distance (d1) may mean a horizontal distance from the busbar step portion (113) to the end of the first input / output terminal (111), and the second bending distance (d2) may mean a horizontal distance from the busbar step portion (113) to the end of the second input / output terminal (112). Accordingly, since each of the first input / output terminal (111) and the second input / output terminal (112) is exposed to a predetermined area or a predetermined length from the case unit (200), there is an advantage in that it can be stably electrically connected to the outside and the load.

[0093] In addition, in the integrated noise filter (1) according to the disclosed embodiment of the present invention, the busbar unit (100) may further include a busbar branch portion (120). The busbar branch portion (120) may be formed to protrude by a predetermined length from one side of the busbar body (110) including the first input / output terminal (111) and the second input / output terminal (112). For example, the busbar branch portion (120) may include a core unit partition portion (121) formed to protrude so as to form a first angle from one side of the busbar body (110), and a core unit guiding portion (122) formed to protrude so as to form a second angle from an end of the core unit partition portion (121). For example, the first angle formed by the core unit partition (121) with the busbar body (110) and the second angle formed by the core unit guiding portion (122) with the core unit partition (121) may each be a right angle (90°), but are not necessarily limited to the disclosed values. At this time, at least a portion of the busbar branch portion (120) may be formed to extend in a direction from the second input / output terminal (112) toward the first input / output terminal (111). For example, the core unit guiding portion (122) of the busbar branch portion (120) may be formed to extend in the negative x-axis direction from the second input / output terminal (112) toward the first input / output terminal (111). As shown in FIG. 7, the busbar branch portion (120) is expressed as being formed by branching from one side of the busbar body (110), but if necessary, the busbar branch portion (120) may be formed by branching from both sides of the busbar body (110), and the core unit guiding portion (122) may be formed by extending in both directions in the positive x-axis direction and the negative x-axis direction.

[0094] Referring to FIGS. 3 to 5, 7, and 14, in the integrated noise filter (1) according to the disclosed embodiment of the present invention, at least one core unit (300) may include a first core unit (310) and a second core unit (320). For example, at least one core unit (300) may include a first core unit (310) that applies a first inductance (L1) to a busbar unit (100). As another example, at least one core unit (300) may include a second core unit (320) that applies a second inductance (L2) to the busbar unit (100). The first core unit (310) may be arranged relatively adjacent to the first input / output terminal (111), and the second core unit (320) may be arranged relatively adjacent to the second input / output terminal (112).

[0095] In addition, the first core unit (310) and the second core unit (320) may be spaced apart from each other in the longitudinal direction (or axial direction, for example, the direction parallel to the x-axis). More specifically, the first core unit (310) and the second core unit (320) may be spaced apart from each other by the bus bar branch portion (120). For example, the first core unit (310) may be inserted from the first input / output portion (111) toward the second input / output portion (112). At this time, the first core unit (310) may be guided by the core unit guiding portion (122). The second core unit (320) may be inserted from the second input / output portion (112) toward the first input / output portion (111). Physical mutual contact between the first core unit (310) and the second core unit (320) can be prevented by the core unit compartment (121) among the busbar branch sections (120).

[0096] The first core unit (310) and the second core unit (320) can form a concentric structure, and each of the first core unit (310) and the second core unit (320) can be formed to be spaced apart from the busbar unit (100). That is, the first core unit (310) and the second core unit (320) included in at least one core unit (310) each have a communication hole, and the inner surface of each of the first core unit (310) and the second core unit (320) formed by the communication holes of the first core unit (310) and the second core unit (320) can be prevented from directly contacting the outer surface of the busbar unit (100). Accordingly, at least one core unit (300) has the advantage of being able to stably apply inductance (L) to the power and signal flowing through the busbar unit (100).

[0097]

[0098] Below, the case unit (200) is described.

[0099] Referring to FIGS. 2, 3, 9 to 15, a case unit (200), which is a component of an integrated noise filter (1) according to the disclosed embodiment of the present invention, can protect at least a portion of a busbar unit (100), at least one core unit (300), and at least one storage unit (400) from an external environment.

[0100] More specifically, the case unit (200) may include a first busbar unit receiving portion (210) that receives a first input / output terminal (111) of the busbar unit (100) and a second busbar unit receiving portion (220) that receives a second input / output terminal (112) of the busbar unit (100) to protect the busbar unit (100) from the external environment. If necessary, the first busbar unit receiving portion (210) and the second busbar unit receiving portion (220) may be formed so that the first input / output terminal (111) and the second input / output terminal (112) of the busbar unit (100) can be easily connected to a power source or a load.

[0101] The first busbar unit receiving portion (210) and the second busbar unit receiving portion (220) may be formed with openings in directions corresponding to different axes, respectively. For example, the first busbar unit receiving portion (210) may be formed with an opening in an upward direction (e.g., a positive z-axis direction) to receive the first input / output terminal (111) of the busbar unit (100). At this time, one surface of the first input / output terminal (111) may be exposed to the outside, and another device (power source or load) may be connected through the exposed portion of the first input / output terminal (111). As another example, the second busbar unit receiving portion (220) may be formed with an opening in a horizontal direction (e.g., a positive x-axis direction) to receive the second input / output terminal (112) of the busbar unit (100). At this time, both sides of the second input / output terminal (111) can be exposed to the outside, and can be connected to another device (power source or load) through the exposed portion of the second input / output terminal (112).

[0102] Additionally, the case unit (200) may include a core unit receiving portion (230). For example, the core unit receiving portion (230) of the case unit (200) may receive at least one core unit (300) such that the center of the at least one core unit (300) corresponds to the axial center of the busbar unit (100). By the core unit receiving portion (230), the at least one core unit (300, which may refer to the second core unit in particular, in the integrated noise filter according to the disclosed embodiment of the present invention) may be aligned to be arranged coaxially with the central axis of the busbar unit (100).

[0103] Meanwhile, the core unit receiving portion (230) may be formed with an opening in a direction corresponding to the same axis as the second busbar unit receiving portion (220). That is, the core unit receiving portion (230) may be formed with an opening in a horizontal direction (e.g., a positive x-axis direction) and may receive a second core unit (320) among at least one core unit (300). Thereafter, the second core unit (320) may be subjected to a molding process to be protected from the external environment.

[0104] In addition, the case unit (200) may further include a storage unit receiving portion (240). The storage unit receiving portion (240) may receive at least one storage unit (400). For example, the storage unit receiving portions (240) may be formed in a pair so as to face each other based on the center of the case unit (200). More specifically, the storage unit receiving portion (240) may include a first storage unit receiving portion (241) for receiving a first storage unit (410) among at least one storage unit (400), and a second storage unit receiving portion (242) for receiving a second storage unit (420) among at least one storage unit (400).

[0105] Meanwhile, in order to miniaturize and integrate the integrated noise filter (1) according to the disclosed embodiment of the present invention, the storage unit receiving portion (240) may be formed with an opening in a direction corresponding to the same axis (e.g., z-axis) as the first busbar unit receiving portion (210), and may be formed with an opening in a direction corresponding to a different axis from the second busbar unit receiving portion (220). That is, the storage unit receiving portion (240) may be formed with an opening in the vertical direction. Accordingly, a structure in which at least one storage unit (400) is stably assembled and soldered on a surface (e.g., a surface corresponding to the xy plane) of the busbar unit (100) can be formed.

[0106] Additionally, the storage unit receiving portion (240) may be formed with an opening in a direction opposite to the first busbar unit receiving portion (210). More specifically, the first busbar unit receiving portion (210) may be formed with an opening in the positive z-axis direction, and the storage unit receiving portion (240) may be formed with an opening in the negative z-axis direction. In the structure of the busbar unit (100) including the busbar bending portion (113), the position at which the storage unit receiving portion (240) is formed may be determined so that at least one storage unit (400) is received adjacent to a layer corresponding to the second input / output terminal (112) so that the at least one storage unit (400) can easily form a connection with a part of the busbar unit (100) and a grounding unit to be described later. Accordingly, at least one storage unit (400) is stably received in the storage unit receiving portion (240) so that it is easily electrically connected to the busbar unit (100), thereby having the advantage of effectively reducing noise.

[0107]

[0108] Below, the grounding unit (500) is described.

[0109] Referring to FIGS. 8, 9, 13, and 15, the integrated noise filter (1) according to the disclosed embodiment of the present invention may further include a pair of grounding units (500). The pair of grounding units (500) may be electrically connected to at least a portion of the busbar unit (100) to form a ground. At this time, the grounding method of the pair of grounding units (500) may be a frame ground (FG), but is not necessarily limited thereto.

[0110] A pair of grounding units (500) may include a first grounding unit (510) and a second grounding unit (520). At this time, the first grounding unit (510) of the pair of grounding units (500) may be electrically connected to the busbar branch portion (120) by both ends of the first capacitor unit (410) of at least one capacitor unit (400) to form a first grounding path. In addition, the second grounding unit (520) of the pair of grounding units (500) may be electrically connected to the first input / output terminal (111) of the busbar unit (100) by both ends of the second capacitor unit (420) to form a second grounding path by the first input / output terminal fastening unit (600) that is formed to protrude to one side.

[0111] The first input / output terminal fastening unit (600) may be formed in a structure that can be coupled to a through-hole formed in at least a portion of the first input / output terminal (111) of the busbar unit (100), and for example, the first input / output terminal fastening unit (600) may be formed in at least one of known coupling structures such as a screw coupling structure, a rivet coupling structure, and a force-fit coupling structure. Meanwhile, in the integrated noise filter (1) according to the disclosed embodiment of the present invention, a capacitor connection unit (700) may be formed to protrude from one side of the first input / output terminal fastening unit (600). The capacitor connection unit (700) enables at least one storage unit (400) to form a stable coupling structure between the capacitor connection unit (700) and the second grounding unit (520).

[0112] In addition, the case unit (200) may further include a pair of grounding unit receiving portions (250) for receiving the aforementioned pair of grounding units (500), respectively. The pair of grounding unit receiving portions (250) may be formed with an opening corresponding to the same axis as the second busbar unit receiving portion (220) for receiving the second input / output terminal (112) of the busbar unit (100). By the pair of grounding unit receiving portions (250), at least a portion of the pair of grounding units (500) is exposed in one direction (for example, the positive x-axis direction) and may form a grounding structure by coming into contact with a specific frame.

[0113]

[0114] Referring to FIG. 4 and FIGS. 13 to 15, the integrated noise filter (1) according to the disclosed embodiment of the present invention may further include an elastic member (800). The elastic member (800) may be disposed between a portion of an inner surface of the case unit and the at least one core unit (300) when the at least one core unit (300) is accommodated in the core unit accommodation portion (230) of the case unit (200) and then molded. For example, the elastic member (800) may be formed in a ring shape and may be formed of a urethane material. After the elastic member (800) is disposed, a portion between the elastic member (800) and the at least one core unit (300) may be molded, so that a structure may be formed in which the molded outer surface of the at least one core unit (300) and a portion of the inner surface of the case unit (200) are elastically supported without directly contacting each other. Accordingly, the integrated noise filter (1) according to the disclosed embodiment of the present invention has the advantage of being able to be stably assembled while having a miniaturized structure.

[0115]

[0116] Hereinafter, an integrated noise filter (2) according to another disclosed embodiment of the present invention will be described. In describing the integrated noise filter (2) according to another disclosed embodiment of the present invention, components different from those of the integrated noise filter (1) according to the aforementioned disclosed embodiment of the present invention will be mainly described, and descriptions of components identical to those of the integrated noise filter (1) according to the aforementioned disclosed embodiment of the present invention will be omitted.

[0117] FIG. 16 is a perspective view of an integrated noise filter (2) according to another disclosed embodiment of the present invention, FIG. 17(a) is a top view of an integrated noise filter (2) according to another disclosed embodiment of the present invention, FIG. 17(b) is a bottom view of an integrated noise filter (2) according to another disclosed embodiment of the present invention, and FIG. 18 is a front view of an integrated noise filter (2) according to another disclosed embodiment of the present invention. In addition, FIG. 19 is an exploded perspective view of an integrated noise filter (2) according to another disclosed embodiment of the present invention.

[0118] Referring to FIGS. 16 to 19 (in particular, FIG. 19), the integrated noise filter (2) according to another embodiment of the present invention may include only one core unit (300). In the integrated noise filter (2) according to another embodiment of the present invention, since there is no problem of a plurality of core units (e.g., a first core unit and a second core unit) physically contacting each other, the configuration of the busbar branch portion (120) may be omitted.

[0119] In addition, the integrated noise filter (2) according to another disclosed embodiment of the present invention may include a pair of grounding units (500) in the same manner as described above. However, the structure of forming a grounding path by at least one storage unit (400) is somewhat different.

[0120] More specifically, a pair of grounding units (500) are electrically connected to at least a portion of a busbar unit (100) to form a ground. At this time, a first grounding unit (510) of the pair of grounding units (500) is electrically connected to one end of a capacitor connection unit (700') that is fixed by a first input / output terminal fastening unit (600) of a first input / output terminal (111) of the busbar unit (100) by both ends of a first capacitor unit (410) of at least one capacitor unit (400) to form a first grounding path, and a second grounding unit (520) of the pair of grounding units (500) is electrically connected to the other end of a capacitor connection unit (700') by both ends of a second capacitor unit (420) of at least one capacitor unit (400) to form a second grounding path.

[0121] That is, the capacitor connection unit (700') may have a through-hole structure having a shape corresponding to the first input / output terminal (111), and may be coupled to the first input / output terminal (111) by the first input / output terminal fastening unit (600). In addition, there is an advantage in that at least one storage unit (400) can be stably assembled and soldered with a pair of grounding units (500) by the structure protrudingly formed at both ends of the capacitor connection unit (700').

[0122]

[0123] Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications can be made within the scope of the patent claims, the detailed description of the invention, and the attached drawings, and it is obvious that this also falls within the scope of the present invention.

[0124] The present invention provides an integrated noise filter that is integrated and miniaturized, thereby improving assembly and stability and miniaturizing the overall power conversion device.

Claims

1. Busbar unit for transmitting power and electrical signals; A case unit that accommodates and covers at least a portion of the above busbar unit; At least one core unit covering a portion of the outer surface of the busbar unit and providing inductance to the busbar unit; and An integrated noise filter characterized by comprising at least one capacitor unit electrically connected to the busbar unit and providing capacitance to the busbar unit.

2. In claim 1, The above busbar unit, An integrated noise filter characterized by comprising a first input / output terminal electrically connected to the outside, and a second input / output terminal formed opposite to the first input / output terminal and electrically connected to a load.

3. In claim 2, The above busbar unit, It further includes a bus bar step portion that forms a step between the first input / output terminal and the second input / output terminal; An integrated noise filter characterized in that the first bending distance from the busbar step portion to the end of the first input / output terminal is shorter than the second bending distance from the busbar step portion to the end of the second input / output terminal.

4. In claim 2, The above busbar unit, It further includes a busbar branch portion formed by protruding a predetermined length from one side of the busbar body including the first input / output terminal and the second input / output terminal; An integrated noise filter characterized in that at least a portion of the busbar branch portion extends in a direction from the second input / output terminal toward the first input / output terminal.

5. In claim 4, The above core unit is, A first core unit applying a first inductance to the above busbar unit; and A second core unit for applying a second inductance to the above busbar unit; An integrated noise filter characterized in that the first core unit and the second core unit are spaced apart from each other by the bus bar branch portion.

6. In claim 5, An integrated noise filter characterized in that the first core unit and the second core unit form a concentric structure, and each of the first core unit and the second core unit is formed spaced apart from the busbar unit.

7. In claim 2, The above case unit, A first busbar unit receiving portion that receives the first input / output terminal of the busbar unit; and An integrated noise filter characterized by comprising a second busbar unit receiving portion that receives the second input / output terminal of the busbar unit.

8. In claim 7, An integrated noise filter characterized in that the first busbar unit receiving portion and the second busbar unit receiving portion are formed with openings in directions corresponding to different axes.

9. In claim 7, The above case unit, Further comprising a core unit receiving portion for receiving at least one core unit such that the center of the at least one core unit corresponds to the axial center of the busbar unit; An integrated noise filter characterized in that the core unit receiving portion is formed with an opening in a direction corresponding to the same axis as the second bus bar unit receiving portion.

10. In claim 7, The above case unit, Further comprising a storage unit receiving portion for receiving at least one storage unit; An integrated noise filter characterized in that the above-mentioned storage unit receiving portion is formed with an opening in a direction corresponding to the same axis as the first busbar unit receiving portion and is formed with an opening in a direction corresponding to a different axis from the second busbar unit receiving portion.

11. In claim 10, An integrated noise filter characterized in that the above-mentioned storage unit receiving portion is formed with an opening in a direction opposite to the above-mentioned first bus bar unit receiving portion.

12. In claim 4, Further comprising a pair of grounding units electrically connected to at least a portion of the above busbar units to form a ground; The first grounding unit among the pair of grounding units is electrically connected to the bus bar branch by both ends of the first storage unit among the at least one storage unit to form a first grounding path, An integrated noise filter characterized in that the second grounding unit among the pair of grounding units is electrically connected to the first input / output terminal fastening unit formed protruding to one side by being fastened to the first input / output terminal of the busbar unit by both ends of the second capacitor unit among the at least one capacitor unit, thereby forming a second grounding path.

13. In claim 12, The above case unit, An integrated noise filter characterized in that it further includes a pair of grounding unit receiving portions, each of which is formed with an opening corresponding to the same axis as a second busbar unit receiving portion that receives the second input / output terminal of the busbar unit and receives the pair of grounding units.

14. In claim 2, Further comprising a pair of grounding units electrically connected to at least a portion of the above busbar units to form a ground; The first grounding unit among the pair of grounding units is electrically connected to one end of a capacitor connection unit that is fixed to the first input / output terminal of the busbar unit by the first input / output terminal fastening unit through both ends of the first capacitor unit among the at least one capacitor unit, thereby forming a first grounding path. An integrated noise filter characterized in that the second grounding unit among the pair of grounding units is electrically connected to the other end of the capacitor connection unit by both ends of the second capacitor unit among the at least one capacitor unit to form a second grounding path.

15. In claim 1, An integrated noise filter characterized in that the at least one core unit is molded after being accommodated in the case unit, and a ring-shaped elastic member is disposed between a portion of the inner surface of the case unit and the molded outer surface of the at least one core unit.

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