Motor

Abstract

The present invention discloses an improved motor for cooling parts other than the rotor. A motor having configurations arranged parallel along the axial direction, the motor comprises a rotor, a stator disposed on one side of the rotor, a plurality of coils disposed on one side of the rotor and wound on the stator, a substrate disposed on one side of the coil and applying current to the coil, and a cooling unit disposed between the stator and the substrate to cool the stator and the substrate.

Description

Technology Field

[0001] The present invention relates to a motor coupled to a cooling fan installed in a vehicle. Background Technology

[0002] The vehicle may be equipped with a cooling fan positioned inside the engine compartment to blow air toward the engine. The cooling fan may be positioned in an area of ​​the engine compartment close to the front grille of the vehicle. Such a cooling fan may include a fan with multiple blades formed as a single unit and a motor that generates power to rotate the fan.

[0003] Among them, the motor is characterized by internal components arranged along the axial direction. Such a motor includes a rotor, a permanent magnet, a stator, coils, and a circuit board, and is arranged in the order of the above components.

[0004] Here, the rotor is the outermost component of the motor and can be rotated by permanent magnets that interact with coils wound on the stator. However, since the rotor does not have a separate hole for airflow, there is a problem in that parts other than the rotor, which are positioned inside the rotation axis along the axial direction, cannot be cooled by the air passing through the grille.

[0005] This can cause damage to the motor's internal components, leading to a degradation in motor performance. Therefore, there is an increasing need for cooling structures to cool the motor's internal components in addition to the rotor. The problem to be solved

[0006] The present invention is intended to solve the above-mentioned problems, and the objective according to an embodiment of the present invention is to provide an improved motor for cooling parts other than the rotor. means of solving the problem

[0007] A motor having configurations arranged parallel along an axial direction according to an embodiment of the present invention comprises: a rotor; a stator disposed on one side of the rotor; a plurality of coils disposed on one side of the rotor and wound on the stator; a substrate disposed on one side of the coil and applying current to the coil; and a cooling unit disposed between the stator and the substrate and cooling the stator and the substrate.

[0008] The above cooling unit may be characterized by being composed of a fluid-flowing channel inside.

[0009] The above cooling unit may include a plurality of first cooling sections covering at least a portion of adjacent coils among a plurality of coils; and a second cooling section connecting each of the first cooling sections.

[0010] The plurality of first cooling sections of the above cooling unit may be characterized by being arranged radially with respect to the rotation center of the rotor.

[0011] One of the plurality of first cooling sections of the cooling unit may have an inlet hole for fluid to flow into it, and another of the plurality of first cooling sections adjacent to the one inlet hole for fluid to be discharged may have an outlet hole for fluid to be discharged.

[0012] The second cooling unit of the above cooling unit may include: a second-1 cooling unit disposed in an area close to the rotation center of the rotor among the first cooling units; and a second-2 cooling unit disposed in an area farthest from the rotation center of the rotor among the first cooling units.

[0013] The second cooling portion of the above cooling unit may be characterized by having a shape that follows the rotational direction of the rotor with respect to the rotational center of the rotor.

[0014] It may further include a sub-cooling unit disposed on one side of the cooling unit, wherein the cooling unit is disposed in close proximity to the substrate and the sub-cooling unit is disposed in close proximity to the stator.

[0015] The above sub-cooling unit may include a plurality of third cooling sections arranged to overlap with the first cooling section of the cooling unit when viewed from the direction toward the stator on the substrate; and a fourth cooling section connecting each of the third cooling sections.

[0016] The fourth cooling unit of the above sub-cooling unit may include: a 4-1 cooling unit disposed in an area close to the rotation center of the rotor among the third cooling units; and a 4-2 cooling unit disposed in an area farthest from the rotation center of the rotor among the third cooling units.

[0017] The 4-1 cooling unit of the 4th cooling unit covers the space between each of the 2-1 cooling units of the cooling unit when viewed from the direction toward the stator on the substrate, and the 4-2 cooling unit of the 4th cooling unit can cover the space between each of the 2-2 cooling units of the cooling unit when viewed from the direction toward the stator on the substrate.

[0018] In addition, a motor having configurations arranged parallel along an axial direction according to an embodiment of the present invention comprises: a rotor; a stator disposed on one side of the rotor; a plurality of coils disposed on one side of the rotor and wound on the stator; a substrate disposed on one side of the coils and applying current to the coils; and a cooling unit disposed between the stator and the substrate, which is folded multiple times and disposed such that at least a portion overlaps with the coils wound on the stator.

[0019] The above cooling unit may be characterized by being composed of a fluid-flowing channel inside.

[0020] The above cooling unit may include a plurality of first cooling sections covering at least a portion of adjacent coils among a plurality of coils; and a second cooling section connecting each of the first cooling sections. Effects of the invention

[0021] According to an embodiment of the present invention, the motor can implement a cooling structure for not only the coil but also the substrate and the stator through a cooling unit that is bent multiple times and arranged to overlap at least a portion with the coil wound on the stator. Accordingly, compared to a conventional motor having an air-cooled cooling structure, the overall size of the motor of the present invention is reduced, thereby increasing the space utilization of the vehicle engine compartment, and the motor's lifespan is maintained, which can reduce costs associated with maintenance and replacement. Brief explanation of the drawing

[0022] FIG. 1 is a diagram illustrating the configuration of a motor according to an embodiment of the present invention. Figure 2 is a drawing illustrating the arrangement of coils in a stator. Figure 3 is a drawing illustrating a cooling unit. Figure 4 is a drawing showing a cooling unit positioned on one side of a coil. Figure 5 is a drawing showing the sub-cooling unit positioned on the motor. Figure 6 is a drawing illustrating a cooling unit and a sub-cooling unit. Figure 7 is a drawing showing a sub-cooling unit positioned on one side of a coil. Figure 8 is a drawing showing a sub-cooling unit positioned on one side of a cooling unit. Specific details for implementing the invention

[0023] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0024] However, the technical concept of the present invention is not limited to some of the described embodiments but can be implemented in various different forms, and within the scope of the technical concept of the present invention, one or more of the components among the embodiments may be selectively combined or substituted.

[0025] In addition, terms used in the embodiments of the present invention (including technical and scientific terms) may be interpreted in a sense that is generally understood by those skilled in the art to which the present invention belongs, unless explicitly and specifically defined otherwise. Terms that are commonly used, such as terms defined in advance, may be interpreted in consideration of their meaning in the context of the relevant technology.

[0026] Furthermore, the terms used in the embodiments of the present invention are for the purpose of describing the embodiments and are not intended to limit the present invention.

[0027] In this specification, the singular form may include the plural form unless specifically stated otherwise in the text, and when described as “at least one of A and B, C (or more than one of them),” it may include one or more of all combinations that can be formed from A, B, and C.

[0028] In addition, terms such as first, second, A, B, (a), (b), etc. may be used to describe the components of the embodiments of the present invention.

[0029] These terms are intended merely to distinguish a component from other components and are not limited by the essence, order, sequence, etc. of the component.

[0030] And, where it is stated that a component is 'connected', 'combined', or 'connected' to another component, this may include not only cases where the component is directly connected, combined, or connected to the other component, but also cases where it is 'connected', 'combined', or 'connected' due to another component located between the component and the other component.

[0031] Furthermore, when described as being formed or placed "above or below" each component, "above" or "below" includes not only cases where two components are in direct contact with each other, but also cases where one or more other components are formed or placed between the two components. Additionally, when expressed as "above or below," it may include the meaning of a downward direction as well as an upward direction relative to a single component.

[0032] Hereinafter, the motor will be described in detail with reference to the attached drawings; however, identical or corresponding components regardless of drawing symbols will be assigned the same reference number, and redundant descriptions thereof will be omitted.

[0033] FIG. 1 is a diagram illustrating the configuration of a motor according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating the arrangement of coils in a stator.

[0034] Referring to FIG. 1, a motor (1) according to an embodiment of the present invention may be coupled to a cooling fan (not shown). More specifically, the motor (1) may be coupled to a cooling fan positioned in the engine room (not shown) of a vehicle and positioned in close proximity to a grille (not shown) positioned on the front side of the vehicle, thereby generating power to rotate the cooling fan. Such a motor (1) may have components arranged parallel to each other along the axial direction of a rotation axis (S). The motor (1) includes a rotor (100), a stator (300), a coil (400), a substrate (500), and a cooling unit (600).

[0035] The rotor (100) is a component positioned at the outermost part of the motor (1) of the present invention and is coupled to a rotation shaft (S) so as to rotate together with the rotation shaft (S). A hole capable of accommodating the rotation shaft (S) and a groove capable of accommodating a permanent magnet (200) may be formed in such a rotor (100).

[0036] A permanent magnet (200) can be received in a groove formed in the rotor (100). A plurality of permanent magnets (200) may be placed in the rotor (100). The permanent magnet (200) may include a N-pole magnet and a S-pole magnet, and the N-pole magnet and the S-pole magnet may be alternately placed in the rotor (100) along the edge of the rotor (100). These permanent magnets (200) may be provided in the same number as the number of coils (400).

[0037] The stator (300) may be positioned on one side of the rotor (100). Additionally, the stator (300) may be positioned between the rotor (100) and the substrate (500). The stator (300) may have a structure in which a plurality of plates are stacked, but is not limited thereto. The stator (300) may support a coil (400) that is wound. The stator (300) may include a plurality of support members that support the coil (400).

[0038] Referring to FIGS. 1 and 2, the coil (400) may be placed on one side of the rotor (100). Additionally, the coil (400) may be placed between the rotor (100) and the substrate (500). Multiple coils (400) may be provided. Each of the multiple coils (400) may be wound on a support formed on the stator (300). While wound on the stator (300), the coil (400) can generate a magnetic field by the current flowing from the substrate (500). By doing so, the coil (400) can interact with the permanent magnet (200) to generate rotational force.

[0039] A substrate (500) may be placed on one side of the coil (400). The substrate (500) may be configured to be placed at the outermost edge of the cooling fan of the present invention. The substrate (500) may be a PCB (Printed Circuit Board). The substrate (500) may apply current to the coil (400) so that the coil (400) can generate a magnetic field. As shown in FIG. 2, the coil (400) may have a straight section (420) and a curved section (440) by being wound on a stator (300).

[0040] FIG. 3 is a drawing showing a cooling unit, and FIG. 4 is a drawing showing the cooling unit positioned on one side of a coil.

[0041] Referring to FIGS. 1, 3, and 4, a cooling unit (600) may be positioned between a stator (300) and a substrate (500) to cool the stator (300) and the substrate (500). More specifically, the cooling unit (600) may contain a fluid inside and cool the stator (300), coil (400), permanent magnet (200), and substrate (500) through the fluid flowing inside. The cooling unit (600) may be configured with a fluid passage inside. Here, the fluid flowing inside the cooling unit (600) may be water, but is not limited thereto. The cooling unit (600) may include a first cooling section (620) and a second cooling section (640).

[0042] A plurality of first cooling units (620) may be provided, and the plurality of first cooling units (620) may be arranged radially with respect to the rotation center (C) of the rotor (100). At this time, each first cooling unit (620) may be provided in a straight line and may have a shape extending from the rotation center (C) of the rotor (100) shown in FIGS. 1, 3, and 4. Such first cooling units (620) may cover at least a portion of adjacent coils (400) among a plurality of coils (400). More specifically, they may cover the straight portion (420) of each adjacent coil (400).

[0043] Here, an inlet hole (hereinafter referred to as the "first inlet hole (622)") through which fluid is introduced is provided in one of the plurality of first cooling units (620), and an outlet hole (hereinafter referred to as the "first outlet hole (624)" through which fluid is discharged may be provided in another of the plurality of first cooling units (620) adjacent to the one in which the first inlet hole (622) is provided. This is to ensure that the fluid, including the second cooling unit (640) to be described later, is discharged after being overlapped as much as possible with the area corresponding to the stator (300) or substrate (500) through the cooling unit (600). Accordingly, among the plurality of first cooling units (620), the first cooling unit (620) in which the first inlet hole (622) and the first outlet hole (624) are provided may have a longer length compared to the other first cooling units (620) in order to allow fluid to be introduced and discharged.

[0044] The second cooling unit (640) can connect each of the first cooling units (620). The second cooling unit (640) may include a second-1 cooling unit (642) and a second-2 cooling unit (644).

[0045] The second-1 cooling section (642) may be positioned in an area of ​​the first cooling section (620) that is close to the rotation center (C) of the rotor (100). The second-2 cooling section (644) may be positioned in an area of ​​the first cooling section (620) that is furthest from the rotation center (C) of the rotor (100).

[0046] This second cooling section (640) may have a shape that follows the rotational direction of the rotor (100) with respect to the rotational center (C) of the rotor (100). That is, the second cooling section (640) having a curved shape may be positioned at a location that overlaps with the curved portion (440) of the coil (400) when viewed from the direction toward the stator (300) or coil (400) from the substrate (500) (based on FIG. 4).

[0047] In this way, the cooling unit (600) can perform heat exchange with the stator (300), coil (400), and substrate (500) by means of a fluid contained therein, with the first cooling section (620) and the second cooling section (640) formed integrally. Accordingly, due to the characteristics of the cooling fan motor having a structure in which the rotor (100) shields other components, the motor of the present invention can have the effect of solving the cooling problem of components other than the rotor (100) that cannot be cooled by natural wind by the rotor (100).

[0048] Additionally, the cooling unit (600) can track the shape of the coil (400) according to the shape and arrangement structure of the first cooling section (620) and the second cooling section (640) and perform heat exchange with the coil (400). This causes effective cooling of the coil (400), which can reduce damage to the coil (400) caused by heat generated in the coil (400). Therefore, performance degradation of the coil (400) due to heat can be prevented.

[0049] FIG. 5 is a drawing showing a sub-cooling unit positioned on a motor, FIG. 6 is a drawing showing a cooling unit and a sub-cooling unit, and FIG. 7 is a drawing showing a sub-cooling unit positioned on one side of a coil.

[0050] Referring to FIGS. 5 to 7, the motor (1) according to an embodiment of the present invention may further include a sub-cooling unit (700). The sub-cooling unit (700) may be disposed on one side of the cooling unit (600). Additionally, the sub-cooling unit (700) may be disposed between the cooling unit (600) and the stator (300). That is, the cooling unit (600) may be disposed close to the substrate (500), and the sub-cooling unit (700) may be disposed close to the stator (300). The sub-cooling unit (700) may include a third cooling section (720) and a fourth cooling section (740).

[0051] A plurality of third cooling units (720) may be provided, and the plurality of third cooling units (720) may be arranged radially with respect to the rotation center (C) of the rotor (100). At this time, each third cooling unit (720) may be provided in a straight line and may have a shape extending from the rotation center (C) of the rotor (100) shown in FIG. 6. Such third cooling units (720) may cover at least a portion of adjacent coils (400) among a plurality of coils (400). More specifically, they may cover the straight portion (420) of each adjacent coil (400).

[0052] Here, an inlet hole (hereinafter referred to as the "second inlet hole (722)") through which fluid is introduced is provided in one of the plurality of third cooling units (720), and an outlet hole (hereinafter referred to as the "second outlet hole (724)" through which fluid is discharged may be provided in another of the plurality of third cooling units (720) adjacent to the one in which the second inlet hole (722) is provided. This is to ensure that the fluid, including the fourth cooling unit (740) to be described later, is discharged after being overlapped as much as possible with the area corresponding to the stator (300) or substrate (500) through the sub-cooling unit (700). Accordingly, among the plurality of third cooling units (720), the third cooling unit (720) in which the second inlet hole (722) and the second outlet hole (724) are provided may have a longer length compared to the other third cooling units (720) in order to allow fluid to be introduced and discharged.

[0053] The fourth cooling unit (740) can connect each of the third cooling units (720). The fourth cooling unit (740) may include the fourth-1 cooling unit (742) and the fourth-2 cooling unit (744).

[0054] The 4-1 cooling section (742) may be positioned in an area of ​​the 3rd cooling section (720) that is close to the rotation center (C) of the rotor (100). The 4-2 cooling section (744) may be positioned in an area of ​​the 3rd cooling section (720) that is furthest from the rotation center (C) of the rotor (100).

[0055] This fourth cooling section (740) may have a shape that follows the rotational direction of the rotor (100) with respect to the rotational center (C) of the rotor (100). That is, the fourth cooling section (740) having a curved shape may be positioned at a location that overlaps with the curved portion (440) of the coil (400) when viewed from the direction toward the stator (300) or coil (400) from the substrate (500) (see FIG. 7).

[0056] Figure 8 is a drawing showing a sub-cooling unit positioned on one side of a cooling unit.

[0057] Referring to FIG. 8, a plurality of third cooling sections (720) of the sub-cooling unit (700) may be arranged to overlap with the first cooling section (620) of the cooling unit (600) when viewed from the direction toward the stator (300) from the substrate (500). This allows the third cooling section (720) of the sub-cooling unit (700) to overlap the effect of heat exchange between the first cooling section (620) of the cooling unit (600) and the straight section (420) of the coil (400), thereby causing stronger cooling of the straight section (420) of the coil (400).

[0058] Additionally, with reference to FIG. 8, the 4-1 cooling section (742) of the 4th cooling section (740) can cover the space between each 2-1 cooling section (642) of the cooling unit (600) when viewed from the direction from the substrate (500) toward the stator (300), and the 4-2 cooling section (744) of the 4th cooling section (740) can cover the space between each 2-2 cooling section (644) of the cooling unit (600) when viewed from the direction from the substrate (500) toward the stator (300).

[0059] This covers the curved portion (440) of the coil (400) that the cooling unit (600) cannot cover, thereby preventing the phenomenon where the coil (400) is not partially cooled and enabling even cooling of the coil (400). Therefore, performance degradation of the coil (400) can be prevented.

[0060] In this way, the motor (1) according to an embodiment of the present invention can implement a cooling structure for the coil (400), as well as the substrate (500) and the stator (300), through a cooling unit (600) that is arranged to overlap at least a portion with the coil (400) which is bent multiple times and wound on the stator (300).

[0061] Accordingly, compared to a conventional motor having an air-cooled cooling structure, the overall size of the motor (1) of the present invention is reduced, thereby increasing the space utilization of the vehicle engine room, and the lifespan of the motor (1) is maintained, thereby reducing the cost of maintenance and replacement.

[0062] Although the present invention has been described above with reference to embodiments thereof, those skilled in the art will understand that various modifications and changes can be made to the invention without departing from the spirit and scope of the invention as set forth in the following claims. Furthermore, differences related to such modifications and changes should be interpreted as being included within the scope of the invention as defined in the appended claims. Explanation of the symbols

[0063] 1: Motor 100: Rotor 200: Permanent magnet 300: Stator 400: Coil 420: Straight section 440: Curved section 500: Substrate 600: Cooling unit 620: First cooling section 622: 1st Entrance Hall 624: 1st Exit Hall 640: 2nd Cooling Section 642: 2-1st Cooling Section 644: 2-2 Cooling Section 700: Sub-cooling Unit 720: 3rd cooling section 722: 2nd inlet hole 724: 2nd Exit Hole 740: 4th Cooling Section 742: 4-1 Cooling Section 744: 4-2 Cooling Section C: Center of rotation S: Axis of rotation

Claims

Claim 1 A motor having configurations arranged parallel along an axial direction, wherein the motor comprises: a rotor; a stator disposed on one side of the rotor; a plurality of coils disposed on one side of the rotor and wound on the stator; a substrate disposed on one side of the coils and applying current to the coils; and a cooling unit disposed between the stator and the substrate and cooling the stator and the substrate. Claim 2 A motor according to claim 1, wherein the cooling unit is characterized by being composed of a fluid-flowing channel inside. Claim 3 In claim 1, the motor comprises a cooling unit including a plurality of first cooling sections covering at least a portion of adjacent coils among a plurality of coils; and a second cooling section connecting each of the first cooling sections. Claim 4 A motor characterized in that, in paragraph 3, a plurality of the first cooling sections of the cooling unit are arranged radially with respect to the rotation center of the rotor. Claim 5 A motor according to claim 4, wherein one of the plurality of first cooling sections of the cooling unit has an inlet hole for fluid to flow into it, and another of the plurality of first cooling sections adjacent to the one having the inlet hole has an outlet hole for fluid to be discharged. Claim 6 In paragraph 3, the second cooling unit of the cooling unit comprises: a second-1 cooling unit disposed in an area close to the rotational center of the rotor among the first cooling units; and a second-2 cooling unit disposed in an area farthest from the rotational center of the rotor among the first cooling units. Claim 7 A motor characterized in that, in paragraph 3, the second cooling portion of the cooling unit has a shape that follows the rotational direction of the rotor with respect to the rotational center of the rotor. Claim 8 A motor according to claim 7, further comprising a sub-cooling unit disposed on one side of the cooling unit, wherein the cooling unit is disposed in close proximity to the substrate and the sub-cooling unit is disposed in close proximity to the stator. Claim 9 In claim 8, the motor comprises: a plurality of third cooling sections arranged to overlap with the first cooling section of the cooling unit when viewed from the substrate toward the stator; and a fourth cooling section connecting each of the third cooling sections. Claim 10 In claim 9, the motor comprises: a fourth cooling section of the sub-cooling unit, wherein the fourth cooling section is positioned in an area close to the rotational center of the rotor among the third cooling sections; and a fourth cooling section, wherein the fourth cooling section is positioned in an area farthest from the rotational center of the rotor among the third cooling sections. Claim 11 A motor characterized in that, in claim 10, the 4-1 cooling portion of the 4th cooling portion covers the space between each of the 2-1 cooling portions of the cooling unit when viewed from the substrate toward the stator, and the 4-2 cooling portion of the 4th cooling portion covers the space between each of the 2-2 cooling portions of the cooling unit when viewed from the substrate toward the stator. Claim 12 A motor having configurations arranged parallel along an axial direction, wherein the motor comprises: a rotor; a stator disposed on one side of the rotor; a plurality of coils disposed on one side of the rotor and wound on the stator; a substrate disposed on one side of the coils and applying current to the coils; and a cooling unit disposed between the stator and the substrate, which is folded multiple times and disposed such that at least a portion overlaps with the coils wound on the stator. Claim 13 In claim 12, the motor is characterized in that the cooling unit is composed of a fluid-flowing channel inside. Claim 14 In claim 12, the motor comprises a cooling unit including a plurality of first cooling sections covering at least a portion of adjacent coils among a plurality of coils; and a second cooling section connecting each of the first cooling sections.

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