motor

Abstract

Embodiments can provide a motor including a shaft, a rotor coupled to the shaft, a stator disposed outside the rotor, and a busbar having a terminal unit connected to a coil of the stator and disposed above the stator, wherein the terminal unit includes a plurality of terminal groups, circuits of the plurality of terminal groups are separated, and the plurality of terminal groups are arranged to form different layers in an axial direction of the shaft and are symmetrically arranged to rotate around a center of the stator.

Description

TECHNICAL FIELD

[0001] The present application relates to a motor. BACKGROUND

[0002] An electric power steering (EPS) system is a device that ensures steering stability of a vehicle and promptly provides a restoring force so that a driver can safely drive the vehicle. The EPS system controls a steering shaft of the vehicle to be driven by driving a motor using an electronic control unit (ECU) according to a driving condition detected by a vehicle speed sensor, a torque angle sensor, a torque sensor, etc.

[0003] The motor includes a rotor and a stator. Coils are wound around the stator. Connection end portions of the coils wound around the stator can be connected to bus bars. The bus bars include a body and terminals. The terminals are connected to the connection end portions of the coils. In addition, the terminals can be connected to an external power source through a cable.

[0004] The terminals can be formed in a combination of phase terminals connected to U-phase, V-phase, and W-phase power sources and a neutral terminal connecting the phase terminals. In this case, in order to secure safety of the motor, a plurality of terminals of such a combination can be provided and circuit division can be performed on the plurality of terminals of such a combination. When an abnormality occurs at a circuit connected to any one terminal or at an element connected to the circuit, the motor can be driven through another terminal. In this case, the plurality of terminals are spatially divided (circuit division) in the body of the bus bar.

[0005] However, since the connection end portions of the terminals are provided at equal intervals, terminals having various shapes can be required.

[0006] When there are terminals having various shapes, since the number of molds increases, there are problems in that costs increase, material loss also increases, and the manufacturing process is complicated.

[0007] In addition, in a process of injection-molding the bus bar, there are problems in that the positions of the plurality of terminals are easily subject to errors and it is difficult to visually check whether the positions of the neutral terminal or the phase terminals are correct.

[0008] Therefore, various researches have been made to simplify the assembly process by unifying the shapes of the plurality of terminals and accurately securing errors in the positions of the terminals, but these researches are still insufficient, and thus there is an urgent need to develop such terminals. SUMMARY

[0009] TECHNICAL PROBLEM

[0010] The present application aims to provide a motor in which the shapes of terminals are unified, the accurate positions of the terminals are secured in a process of molding a bus bar, and an assembly process is simplified.

[0011] The present invention aims to provide a motor in which various terminal groups are implemented by combining and arranging general terminals.

[0012] The present invention aims to provide a motor that is capable of minimizing an increase in torque pulsation and reducing noise and vibration when some of a plurality of terminal groups fail.

[0013] Accordingly, various researches have been conducted to simplify an assembly process by unifying shapes of a plurality of terminals and precisely securing a position error of the terminals, but the researches are still insufficient, and thus there is an urgent need to develop such terminals.

[0014] Technical Solution

[0015] One aspect of the present invention provides a motor including a stator and a busbar disposed on the stator, wherein the busbar includes a busbar holder and a first terminal group, a second terminal group, and a third terminal group coupled to the busbar holder, each of the first terminal group, the second terminal group, and the third terminal group includes a plurality of terminals, each of the plurality of terminals includes a terminal portion, and a terminal portion of one of the plurality of terminals of the second terminal group is disposed between a terminal portion of one of the plurality of terminals of the first terminal group and a terminal portion of one of the plurality of terminals of the third terminal group.

[0016] The plurality of terminals can include a first terminal, a second terminal, and a third terminal.

[0017] Another aspect of the present invention provides a motor including a stator and a busbar disposed on the stator, wherein the busbar includes a busbar holder and a first terminal group, a second terminal group, and a third terminal group coupled to the busbar holder, each of the first terminal group, the second terminal group, and the third terminal group includes a first terminal to a third terminal, each of the first terminal to the third terminal includes a terminal portion, a current is independently applied to each of the first terminal group to the third terminal group, and distances between the terminal portions of the first terminal to the third terminal of the first terminal group from each other are the same.

[0018] Still another aspect of the present invention provides a motor including a stator and a busbar disposed on the stator, wherein the busbar includes a busbar holder and a first terminal group, a second terminal group, and a third terminal group coupled to the busbar holder, each of the first terminal group, the second terminal group, and the third terminal group includes a first terminal to a third terminal, each of the first terminal to the third terminal includes a terminal portion, a terminal portion of one of the first terminal to the third terminal of the second terminal group and a terminal portion of one of the first terminal to the third terminal of the third terminal group are disposed between a terminal portion of the first terminal of the first terminal group and a terminal portion of the second terminal of the first terminal group.

[0019] Each of the first terminal to the third terminal can include a body and a terminal portion and a protruding portion extending from the body, the terminal portion can extend from one side of the body, and the protruding portion can extend from the other side of the body.

[0020] The terminal portion can be coupled to a coil of the stator, and the protruding portion can be connected to an external power source.

[0021] The shape of at least one of the first terminal, the second terminal, and the third terminal can be different from the shape of the remaining terminals.

[0022] The lengths of two of the bodies of the first terminal, the body of the second terminal, and the body of the third terminal can be the same and greater than the length of the remaining one.

[0023] The protruding portions of the first terminal to the third terminal of the first terminal group can be disposed in a first area of the bus bar holder, the protruding portions of the first terminal to the third terminal of the second terminal group can be disposed in a second area of the bus bar holder, the protruding portions of the first terminal to the third terminal of the third terminal group can be disposed in a third area of the bus bar holder, and the distance between the first area and the second area can be the same as the distance between the second area and the third area.

[0024] The distance between the first area and the second area can be less than the distance between the first area and the third area.

[0025] Preferably, the first area, the second area, and the third area can be disposed in the first quadrant region among the quadrant regions divided by orthogonal axes (x-axis and y-axis) passing through the center (C1) of the stator.

[0026] The bus bar can include a fourth terminal group including the first terminal to the third terminal, and the first terminal group to the fourth terminal group are electrically insulated from each other.

[0027] Each of the first terminal to the third terminal of the fourth terminal group can include a body and a terminal portion and a protruding portion extending from the body, the terminal portion can extend from one side of the body, and the protruding portion can extend from the other side of the body.

[0028] The protruding portions of the first to third terminals of the first terminal group can be disposed in a first region of the busbar holder, the protruding portions of the first to third terminals of the second terminal group can be disposed in a second region of the busbar holder, the protruding portions of the first to third terminals of the third terminal group can be disposed in a third region of the busbar holder, the protruding portions of the first to third terminals of the fourth terminal group can be disposed in a fourth region of the busbar holder, and distances between the first to fourth regions from each other can be identical.

[0029] The terminal portion of one of the second terminal or the third terminal of the third terminal group and the terminal portion of one of the second terminal or the third terminal of the fourth terminal group can be disposed between the terminal portion of the first terminal of the first terminal group and the terminal portion of the first terminal of the second terminal group.

[0030] One of the second terminal or the third terminal of the third terminal group can be the second terminal, and one of the second terminal or the third terminal of the fourth terminal group can be the second terminal.

[0031] One of the second terminal or the third terminal of the third terminal group can be the second terminal, and one of the second terminal or the third terminal of the fourth terminal group can be the third terminal.

[0032] The first terminal group, the second terminal group, and the third terminal group can be disposed to form different layers in the axial direction, wherein a first layer in which the first terminal group is disposed can include a first upper layer in which a plurality of first phase terminals are disposed and a first lower layer positioned below the first upper layer and in which a first neutral terminal is disposed, and a lower section of the first upper layer and an upper section of the first lower layer can be disposed to overlap in the radial direction.

[0033] Advantageous Effects

[0034] According to the embodiments, since terminals having the same shape are combined to implement terminals connected to three or more divided circuits, advantageous effects of securing accurate positions of the terminals in the process of molding the busbar and simplifying the assembly process are provided.

[0035] In addition, according to the embodiments, although the plurality of terminals have the same shape, since the protruding portions of the terminals are easily arranged at equal intervals, advantageous effects of improving insulation stability are provided.

[0036] In addition, according to the embodiments, even when some of the plurality of terminal groups in which circuits are separated fail, since torque can be generated symmetrically around the center of the stator at all sections of the stator, advantageous effects of minimizing an increase in torque pulsation and reducing noise and vibration are provided.

[0037] The various useful advantages and effects of the embodiments are not limited to the above, and the various useful advantages and effects of the embodiments will be more readily understood from the description of the specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a cross-sectional view illustrating a motor according to an embodiment.

[0039] Figure 2 is a plan view for describing a bus bar in a motor according to a first embodiment.

[0040] Figures 3 to 5 is a perspective view for describing a phase terminal in a motor according to the first embodiment.

[0041] Figure 6 is a plan view for describing a neutral terminal in a motor according to the first embodiment.

[0042] Figure 7 is a plan view for describing a first terminal group in a motor according to the first embodiment.

[0043] Figure 8 is a plan view for describing a second terminal group in a motor according to the first embodiment.

[0044] Figure 9 is a plan view for describing a third terminal group in a motor according to the first embodiment.

[0045] Figure 10 is a view for describing a circuit configuration of a terminal group in a motor according to the first embodiment.

[0046] Figures 11 to 14 is a cross-sectional view for describing a layout of a phase terminal and a neutral terminal in a motor according to the first embodiment.

[0047] Figure 15 is a plan view for describing a bus bar in a motor according to a second embodiment.

[0048] Figure 16 is a plan view for describing a first terminal group in a motor according to the second embodiment.

[0049] Figure 17 is a plan view for describing a second terminal group in a motor according to the second embodiment.

[0050] Figure 18 is a plan view for describing a third terminal group in a motor according to the second embodiment.

[0051] Figure 19is a plan view for describing bus bars in a motor according to the third embodiment.

[0052] Figure 20 is a plan view for describing a first terminal group in a motor according to the third embodiment.

[0053] Figure 21 is a plan view for describing a second terminal group in a motor according to the third embodiment.

[0054] Figure 22 is a plan view for describing a third terminal group in a motor according to the third embodiment.

[0055] Figure 23 is a plan view for describing a fourth terminal group in a motor according to the third embodiment.

[0056] Figure 24 is a view for describing a circuit configuration of a terminal group in a motor according to the third embodiment.

[0057] Figure 25 is a plan view for describing bus bars in a motor according to the fourth embodiment.

[0058] Figure 26 is a plan view for describing a first terminal group in a motor according to the fourth embodiment.

[0059] Figure 27 is a plan view for describing a second terminal group in a motor according to the fourth embodiment.

[0060] Figure 28 is a plan view for describing a third terminal group in a motor according to the fourth embodiment.

[0061] Figure 29 is a plan view for describing a fourth terminal group in a motor according to the fourth embodiment.

[0062] Figure 30 is a view for describing a winding structure of a coil in a motor according to the fourth embodiment.

[0063] Figure 31 is a view for describing a failure state of a first terminal group in a motor according to the fourth embodiment.

[0064] Figure 32 is a plan view for describing bus bars in a motor according to the fifth embodiment.

[0065] Figure 33 is a plan view for describing bus bars in a motor according to the sixth embodiment.

[0066] Figure 34 is a view for describing a stacked structure of a terminal group in a motor according to an embodiment.

[0067] Figure 35 is a view for describing a first bus bar holder to a fourth bus bar holder in a motor according to an embodiment. DETAILED DESCRIPTION

[0068] Hereinafter, exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0069] However, the technical spirit of the present application is not limited to some embodiments to be described, and can be implemented in various different forms, and at least one or more components of the embodiments can be selectively combined, replaced, and used within the scope of the technical spirit.

[0070] In addition, unless the context clearly indicates and specifically defines otherwise, all terms (including technical and scientific terms) used herein can be interpreted as having a meaning that is generally understood by one of ordinary skill in the art, and the meaning of terms commonly used, such as those defined in a general dictionary, will be interpreted in the context of the relevant art.

[0071] In addition, the terms used in the embodiments of the present application are considered only in a descriptive sense, and do not limit the present application.

[0072] In this specification, the singular form includes the plural form unless the context clearly indicates and specifically defines otherwise, and in the case of describing "at least one of A, B, and C (or one or more of A, B, and C)," this can include at least one of all possible combinations of A, B, and C.

[0073] In addition, in the description of components of the present application, terms such as "first," "second," "A," "B," "(a)," and "(b)" can be used.

[0074] The terms are used only to distinguish one element from another element, and the nature, order, etc. of the elements are not limited by the terms.

[0075] In addition, it should be understood that when one element is referred to as being "connected" or "coupled" to another element, such description can include both cases where the element is directly connected or coupled to the other element and where the element is connected or coupled to the other element with yet another element interposed therebetween.

[0076] Also, when any one element is described as being formed or disposed "above" or "below" another element, such description includes both cases where the two elements are formed or disposed in direct contact with each other and where one or more other elements are interposed between the two elements. Also, when one element is described as being disposed "above" or "below" another element, such description can include a case where the one element is disposed at an upper side or a lower side with respect to the other element.

[0077] Hereinafter, in the detailed description of exemplary embodiments of the present application with reference to the accompanying drawings, components that are the same or correspond to each other will be denoted by the same reference numerals in all the drawings, and redundant descriptions will be omitted.

[0078] Referring to Figures 1 to 14 According to the embodiment, the motor can include a shaft 10, a rotor 20 coupled to the shaft 10, a stator 30 disposed outside the rotor 20, a plurality of terminal groups 110, 120, 130 connected to coils 31 of the stator 30, and a bus bar 40 disposed on the stator 30.

[0079] The shaft 10 can be coupled to the rotor 20, the rotor 20 rotates when electromagnetic interaction occurs between the rotor 20 and the stator 30 due to the supply of current, and the shaft 10 co-rotates with the rotor 20. As an example, the shaft 10 can be connected to a steering shaft of a vehicle and can transmit power to the steering shaft of the vehicle. In this case, the longitudinal direction of the shaft 10 can be referred to as an axial direction. Also, a direction perpendicular to the axial direction can be referred to as a radial direction.

[0080] The rotor 20 rotates by electrical interaction with the stator 30.

[0081] The rotor 20 can include a rotor core and a magnet. As an example, the rotor core can be formed in the form of a plurality of thin ring-shaped steel plates stacked or in the form of a single container.

[0082] A hole (not shown) coupled to the shaft 10 can be formed in a central portion of the rotor core. A protruding portion (not shown) that guides the magnet (not shown) can be formed to protrude from an outer circumferential surface of the rotor core. The magnet can be attached to the outer circumferential surface of the rotor core. A plurality of magnets can be disposed at predetermined intervals along the circumference of the rotor core.

[0083] Also, the rotor 20 can include a can-shaped member (not shown) that surrounds the magnet to fix the magnet not to be separated from the rotor core and prevent the magnet from being exposed.

[0084] The stator 30 can include coils 31 that can be wound around the stator 30 to cause electrical interaction with the rotor 20.

[0085] A specific structure for winding the coil 31 around the stator 30 will be described below. The stator 30 can include a stator core (not shown) having a plurality of teeth (not shown). The stator core can include a ring-shaped yoke (not shown) and a plurality of teeth protruding toward the center from the yoke. The coil 31 can be wound around the teeth. In this case, the teeth can be formed at a predetermined interval in a circumferential direction along an outer circumferential surface of the yoke. Meanwhile, the stator core can be formed by stacking a plurality of thin steel plates. In addition, the stator core can be formed by coupling or connecting a plurality of divided cores.

[0086] In addition, the motor includes a housing 50 in which the rotor 20 and the stator 30 are accommodated.

[0087] In addition, the motor can include a sensing magnet 60 and a printed circuit board 70.

[0088] The sensing magnet 60 is coupled to the shaft 10 to operate in conjunction with the rotor 20. The sensing magnet 60 is a device for detecting the position of the rotor 20.

[0089] A sensor that detects the magnetic force of the sensing magnet 60 can be provided on the printed circuit board 70. As an example, the sensor can be a Hall integrated circuit (IC). In this case, the sensor detects a change in the N pole and the S pole of the sensing magnet 60 and generates a sensing signal.

[0090] The bus bar 40 can include a plurality of terminal groups 110, 120, 130 connected to the coil 31 of the stator 30, and a bus bar holder 42. In addition, the bus bar 40 can be provided on the stator 30.

[0091] The bus bar 40 can be formed in a structure including the plurality of terminal groups 110, 120, 130 provided in the bus bar holder 42.

[0092] The bus bar holder 42 can be a molded part formed by injection molding. In addition, the bus bar holder 42 can be formed in a ring shape in which a hole (not shown) is formed in a central portion of the bus bar holder 42. The terminal groups are provided in the bus bar holder 42, and terminal portions of the terminals constituting the terminal groups are provided to be exposed to the outside of the bus bar holder 42. As a reference, the bus bar holder 42 can have a multi-layer or single-layer structure, and is inserted into injection molding together with the plurality of terminal groups 110, 120, 130.

[0093] Reference Figures 2 to 14According to the first embodiment, the busbar 40 can include the first terminal group 110, the second terminal group 120, and the third terminal group 130. Also, each of the first terminal group 110, the second terminal group 120, and the third terminal group 130 can include a plurality of terminals. In this case, the terminal portion 101b, 102b, or 103b of one of the plurality of terminals 122, 124, 126 of the second terminal group 120 is disposed between the terminal portion 101b, 102b, or 103b of one of the plurality of terminals 112, 114, 116 of the first terminal group 110 and the terminal portion 101b, 102b, or 103b of one of the plurality of terminals 132, 134, 136 of the third terminal group 130. For example, the terminal portion 102b of the terminal 122 of the second terminal group 120 can be disposed between the terminal portion 103b of the terminal 116 of the first terminal group 110 and the terminal portion 103b of the terminal 134 of the third terminal group 130 in the circumferential direction.

[0094] The first terminal group 110, the second terminal group 120, and the third terminal group 130 are electrically insulated (circuit-separated), and the first terminal group 110, the second terminal group 120, and the third terminal group 130 include the plurality of terminals 112, 114, 116, 122, 124, 126, 132, 134, 136 having the terminal portions 101b, 102b, 103b and the terminal portions 104b.

[0095] For reference, in this embodiment, the meaning of circuit-dividing the plurality of terminal groups 110, 120, 130 is defined as connecting the plurality of terminal groups 110, 120, 130 to the coils 31 of the stator 30 but being circuit-divided such that motor control circuits independent of each other are formed (see FIG. 2). Figure 10 Also, the plurality of terminal groups 110, 120, 130 can independently drive the motor.

[0096] Also, in this embodiment, the meaning of the plurality of terminal groups 110, 120, 130 including the plurality of terminals 112, 114, 116, 122, 124, 126, 132, 134, 136 is defined as the plurality of terminal groups 110, 120, 130 including phase terminals connected to U-phase, V-phase, and W-phase power sources and a neutral terminal connected to the phase terminals.

[0097] More specifically, the first terminal group 110 can include three phase terminals 112, 114, 116 and one neutral terminal 118. Also, the second terminal group 120 can include three phase terminals 122, 124, 126 and one neutral terminal 128. Also, the third terminal group 130 can include three phase terminals 132, 134, 136 and one neutral terminal 138. Also, referring to Figures 7 to 9 A portion of each of the second terminals 114, 124, 134 of the terminal groups 110, 120, 130 can be disposed to overlap one of the neutral terminals 118, 128, 138 in the axial direction.

[0098] Referring to Figure 7 The first terminal group 110 includes a first terminal 112 (e.g., U1 phase), a second terminal 114 (e.g., V1 phase), and a third terminal 116 (e.g., W1 phase), and a neutral terminal, in which the terminal portions 101b, 102b, 103b of the first, second, and third terminals 112, 114, and 116 are disposed at intervals of 120 degrees about the center C1 of the stator 30. In this case, the center C1 of the stator 30 can be the center of rotation of the shaft 10.

[0099] Referring to Figure 8 The second terminal group 120 includes a first terminal 122 (e.g., U2 phase), a second terminal 124 (e.g., V2 phase), a third terminal 126 (e.g., W2 phase), and a neutral terminal, in which the terminal portions 101b, 102b, 103b of the first, second, and third terminals 122, 124, and 126 are disposed at intervals of 120 degrees about the center C1 of the stator 30.

[0100] Referring to Figure 9 The third terminal group 130 includes a first terminal 132 (e.g., U3 phase), a second terminal 134 (e.g., V3 phase), a third terminal 136 (e.g., W3 phase), and a neutral terminal, in which the terminal portions 101b, 102b, 103b of the first, second, and third terminals 132, 134, and 136 are disposed at intervals of 120 degrees about the center C1 of the stator 30.

[0101] As a reference, in the present embodiment, the meaning of the terminal portions 101b, 102b, 103b of the first terminals 112, 122, 132, the second terminals 114, 124, 134, and the third terminals 116, 126, 136 of the terminal groups 110, 120, 130 is defined as the terminal portions 101b, 102b, 103b of the first terminals 112, 122, 132, the second terminals 114, 124, 134, and the third terminals 116, 126, 136 are arranged at intervals of 120 degrees around the center of the stator 30 (or the center of the bus bar).

[0102] With reference to Figures 3 to 5 , the first terminals 112, 122, 132, the second terminals 114, 124, 134, and the third terminals 116, 126, 136 of the plurality of terminal groups 110, 120, 130 can include a body 101a, 102a, 103a, a terminal portion 101b, 102b, 103b extending from one side of the body 101a, 102a, 103a, and a protruding portion 101c, 102c, 103c extending from the other side of the body 101a, 102a, 103a. For example, the first terminal group 110 can include the first terminal 112, the second terminal 114, and the third terminal 116. In addition, the first terminal 112 can include the body 101a, the terminal portion 101b extending from one side of the body 101a, and the protruding portion 101c extending from the other side of the body 101a. In addition, the second terminal 114 can include the body 102a, the terminal portion 102b extending from one side of the body 102a, and the protruding portion 102c extending from the other side of the body 102a. In addition, the third terminal 116 can include the body 103a, the terminal portion 103b extending from one side of the body 103a, and the protruding portion 103c extending from the other side of the body 103a.

[0103] The body 101a, 102a, 103a can be formed as a straight band type member or a band type member having a curved surface. The body 101a, 102a, 103a, the terminal portion 101b, 102b, 103b, and the protruding portion 101c, 102c, 103c can be divided and described only according to their shape and functional characteristics, and can be one integrally connected member.

[0104] For example, the body 101a of the first terminal 112, 122, 132 of the first terminal group 110, the second terminal group 120, and the third terminal group 130 can each be formed as a straight band-type member. However, the body 102a, 103a of the second terminal 114, 124, 134 and the third terminal 116, 126, 136 of the first terminal group 110, the second terminal group 120, and the third terminal group 130 can each be formed as a band-type member in an arc shape having a predetermined curvature.

[0105] The terminal portions 101b, 102b, 103b extend from the side surface (the outer side surface or the inner side surface) of the body 101a and protrude in the radial direction of the stator 30 from the outer side surface (or the inner side surface) of the bus bar holder 42, and the end portions of the terminal portions 101b, 102b, 103b are each formed in a curved shape such as a hook shape.

[0106] The terminal portions 101b, 102b, 103b are electrically connected to the coils 31 of the stator 30. As an example, the terminal portions 101b, 102b, 103b can be welded to the coils 31 of the stator 30.

[0107] For reference, the bodies 101a, 102a, 103a and the terminal portions 101b, 102b, 103b can be formed in a single-layer structure or a double-layer structure (a multi-layer structure). However, the present embodiment is not bound or limited by the connection structure of the bodies 101a, 102a, 103a and the terminal portions 101b, 102b, 103b.

[0108] The protruding portions 101c, 102c, 103c can each extend in the vertical direction (the axial direction) from the upper surface of the body 101a, 102a, 103a and be disposed to protrude from the upper surface of the bus bar holder 42.

[0109] The protruding portions 101c, 102c, 103c are electrically connected to the external power cables of the U-phase, the V-phase, and the W-phase.

[0110] For reference Figure 6 , each of the neutral terminals 118, 128, 138 of the terminal groups includes a body 104a and three terminal portions 104b extending from one side of the body 104a.

[0111] As an example, the body 104a of the neutral terminal 118, 128, 138 can each be formed as a band-type member in an arc shape having a predetermined curvature.

[0112] The terminal portions 104b of the neutral terminals 118, 128, 138 can be provided to extend from a side surface (an outer side surface or an inner side surface) of the bodies 104a of the neutral terminals 118, 128, 138 in the radial direction of the stator 30 and to protrude from an outer side surface (or an inner side surface) of the bus bar holder 42. In addition, end portions of the terminal portions 104b can each be formed in a curved shape such as a hook shape.

[0113] The terminal portions 104b of the neutral terminals 118, 128, 138 are electrically connected to the coils 31 of the stator 30. As an example, the terminal portions 104b of the neutral terminals 118, 128, 138 can be welded to the coils 31 of the stator 30.

[0114] According to the example embodiment, the body 102a of the second terminal 124 of the second terminal group 120 can be provided inside the body 102a of the second terminal 114 of the first terminal group 110 in the radial direction of the stator 30. In addition, the body 102a of the second terminal 124 of the second terminal group 120 can be provided outside the body 102a of the second terminal 134 of the third terminal group 130 in the radial direction of the stator 30. For example, the body 102a of the second terminal 124 of the second terminal group 120 can be provided between the body 102a of the second terminal 114 of the first terminal group 110 and the body 102a of the second terminal 134 of the third terminal group 130 in the radial direction.

[0115] In this case, the terminal portion 102b of the second terminal 134 of the third terminal group 130 can be provided outside the body 102a of the third terminal 116 of the first terminal group 110 so as to cross the body 103a of the third terminal 116 of the first terminal group 110. In addition, the terminal portion 103b of the third terminal 136 of the third terminal group 130 can be provided outside the body 102a of the first terminal group 110 so as to cross the body 103a of the third terminal 126 of the second terminal group 130 and the body 102a of the second terminal 114 of the first terminal group 110 in order. For example, a portion of the second terminal 134 of the third terminal group 130 can be provided to overlap the body 103a of the third terminal 116 of the first terminal group 110 in the axial direction. In addition, a portion of the third terminal 136 of the third terminal group 130 can be provided to overlap the body 103a of the third terminal 126 of the second terminal group 130 and the body 102a of the second terminal 114 of the first terminal group 110 in the axial direction.

[0116] According to another embodiment, the body of the second terminal of the first terminal group can also be provided inside the body of the second terminal of the third terminal group. Alternatively, the body of the second terminal of the first terminal group can also be provided inside the body of the second terminal of the second terminal group.

[0117] According to an exemplary embodiment, at least one of each of the first terminal 112, 122, 132, the second terminal 114, 124, 134, and the third terminal 116, 126, 136 of the terminal set 110, 120, 130 can be formed in a shape different from that of the remaining terminals.

[0118] As an example, in the body 101a of the first terminal 112, 122, 132, the body 102a of the second terminal 114, 124, 134, and the body 103a of the third terminal 116, 126, 136, the lengths of two bodies are equal to each other and greater than the length of the remaining body.

[0119] More specifically, the first terminal 112, 122, 132 of the terminal set 110, 120, 130 can be formed to have a shape and a length of the body different from those of the body of the second terminal 114, 124, 134 and the third terminal 116, 126, 136 of the terminal set 110, 120, 130. In addition, the bodies of the second terminal 114, 124, 134 and the third terminal 116, 126, 136 of the terminal set 110, 120, 130 can be formed to have the same shape and the same length.

[0120] Therefore, since the structure (shape) of the second terminal 114, 124, 134 and the third terminal 116, 126, 136 among the first terminal 112, 122, 132, the second terminal 114, 124, 134, and the third terminal 116, 126, 136 of the terminal set 110, 120, 130 is the same, the second terminal 114, 124, 134 and the third terminal 116, 126, 136 of the terminal set 110, 120, 130 can be manufactured using one mold, and thus the beneficial effects of simplifying the manufacturing process and reducing the manufacturing cost can be obtained.

[0121] According to an exemplary embodiment, the shape of the neutral terminal 118, 128, 138 of the terminal set 110, 120, 130 can also be formed in the same structure. Therefore, since the neutral terminal 118, 128, 138 of the terminal set 110, 120, 130 can be manufactured using one mold, the beneficial effects of simplifying the manufacturing process and reducing the manufacturing cost can be obtained.

[0122] Reference Figure 2The terminal portion 102b of the second terminal 124 of the second terminal group 120 can be provided between the terminal portion 103b of the third terminal 116 of the first terminal group 110 and the terminal portion 101b of the first terminal 132 of the third terminal group 130.

[0123] As an example, the terminal portion 102b of the second terminal 124 of the second terminal group 120 can be provided between the terminal portion 103b of the third terminal 116 of the first terminal group 110 and the terminal portion 101b of the first terminal 132 of the third terminal group 130.

[0124] Similarly, the terminal portion 101b of the first terminal 122 of the second terminal group 120 can be provided between the terminal portion 102b of the second terminal 114 of the first terminal group 110 and the terminal portion 103b of the third terminal 136 of the third terminal group 130. In addition, the terminal portion 103b of the third terminal 126 of the second terminal group 120 can be provided between the terminal portion 101b of the first terminal 112 of the first terminal group 110 and the terminal portion 102b of the second terminal 134 of the third terminal group 130.

[0125] Therefore, in the present embodiment, since the terminal portion 102b of the second terminal 124 of the second terminal group 120 is provided between the terminal portion 103b of the third terminal 116 of the first terminal group 110 and the terminal portion 101b of the first terminal 132 of the third terminal group 130, the terminal portions 101b, 102b, 103b of the plurality of terminal groups 110, 120, 130 can be symmetrically provided about the center Cl of the stator 30, and thus the current can be symmetrically supplied through the plurality of terminal groups 110, 120, 130 about the center Cl of the stator 30.

[0126] In addition, with reference to Figure 2According to an exemplary embodiment, the motor can include a stator 30 and a busbar 40 disposed on the stator 30, and the busbar 40 can include a busbar holder 42 and a first terminal set 110, a second terminal set 120, and a third terminal set coupled to the busbar holder 42. In addition, the first terminal set 110, the second terminal set 120, and the third terminal set 130 can include first to third terminals 112, 114, 116, 122, 124, 126, 132, 134, 136 having terminal portions 101b, 102b, 103b. In addition, the terminal portions 101b, 102b, 103b of one of the first to third terminals 122, 124, 126 of the second terminal set 120 and the terminal portions 101b, 102b, 103b of one of the first to third terminals 132, 134, 136 of the third terminal set 130 are disposed between the terminal portion 101b of the first terminal 112 of the first terminal set 110 and the terminal portion 102b of the second terminal 114 of the first terminal set 110. That is, one terminal portion of the second terminal set 120 and one terminal portion of the third terminal set 130 can be disposed between two terminal portions of the first terminal set 110 in a circumferential direction.

[0127] As an example, the terminal portion 101b of the first terminal 122 of the second terminal set 120 and the terminal portion 103b of the third terminal 136 of the third terminal set 130 can be disposed between the terminal portion 101b of the first terminal 122 of the first terminal set 110 and the terminal portion 102b of the second terminal 114 of the first terminal set 110.

[0128] Similarly, the terminal portion 103b of the third terminal 126 of the second terminal set 120 and the terminal portion 102b of the second terminal 134 of the third terminal set 130 can be disposed between the terminal portion 103b of the third terminal 116 of the first terminal set 110 and the terminal portion 101b of the first terminal 112 of the first terminal set 110. In addition, the terminal portion 102b of the second terminal 124 of the second terminal set 120 and the terminal portion 101b of the first terminal 132 of the third terminal set 130 can be disposed between the terminal portion 102b of the second terminal 114 of the first terminal set 110 and the terminal portion 103b of the third terminal 116 of the first terminal set 110.

[0129] Therefore, in the embodiment, since the terminal portion 101b of the first terminal 122 of the second terminal group 120 and the terminal portion 103b of the third terminal 136 of the third terminal group 130 are provided between the terminal portion 101b of the first terminal 122 of the first terminal group 110 and the terminal portion 102b of the second terminal 114 of the first terminal group 110, the terminal portions 101b, 102b, 103b of the plurality of terminal groups 110, 120, 130 can be symmetrically provided about the center Cl of the stator 30, and thus the current can be symmetrically supplied through the plurality of terminal groups 110, 120, 130 about the center Cl of the stator 30.

[0130] According to the exemplary embodiment, the terminal portions 101b, 102b, 103b of the terminals of the first terminal group 110, the second terminal group 120, and the third terminal group 130, which are electrically separated (electrically insulated) from each other, are provided at equal intervals about the center Cl of the stator 30.

[0131] More specifically, the third terminal 136 of the third terminal group 130, the first terminal 122 of the second terminal group 120, the second terminal 114 of the first terminal group 110, the first terminal 132 of the third terminal group 130, the second terminal 124 of the second terminal group 120, the third terminal 116 of the first terminal group 110, the second terminal 134 of the third terminal group 130, and the third terminal 126 of the second terminal group 120 are sequentially provided at 40-degree intervals in a clockwise direction from the first terminal 112 of the first terminal group 110 provided in a 12 o'clock direction about the center Cl of the stator 30.

[0132] Therefore, in the present embodiment, since the terminal portions 101b, 102b, 103b of the terminals 112, 114, 116, 122, 124, 126, 132, 134, 136 of the plurality of terminal groups 110, 120, 130, which are circuit-divided, are provided at equal intervals about the center Cl of the stator 30, even when a particular terminal group (for example, the first terminal group) among the plurality of terminal groups 110, 120, 130 fails (see Figure 31 ), the current can be symmetrically applied (for example, the current can be applied to the coils at 120-degree equal intervals about the center of the stator) through the remaining normal terminal groups that normally operate about the center Cl of the stator 30, and thus the advantageous effects of minimizing an increase in torque pulsation and improving driving stability and reliability of the motor can be obtained.

[0133] According to the exemplary embodiment, the protruding portions 101c, 102c, 103c of the first to third terminals 112, 114, 116 of the first terminal group 110 can be disposed in a first region R1 of the bus bar holder 42, the protruding portions 101c, 102c, 103c of the first to third terminals 122, 124, 126 of the second terminal group 120 can be disposed in a second region R2 of the bus bar holder 42, and the protruding portions 101c, 102c, 103c of the first to third terminals 132, 134, 136 of the third terminal group 130 can be disposed in a third region R3 of the bus bar holder 42. In this case, the angular distance between the first region R1 and the second region R2 and the angular distance between the second region R2 and the third region R3 are the same.

[0134] As an example, with reference to Figure 2 , the protruding portions 101c, 102c, 103c of the first to third terminals 112, 114, 116 of the first terminal group 110 can be disposed in a first region R1 of the bus bar holder 42 defined in a 12 o'clock direction (in Figure 2 ). In addition, the protruding portions 101c, 102c, 103c of the first to third terminals 122, 124, 126 of the second terminal group 120 can be disposed in a second region R2 of the bus bar holder 42 defined to be spaced apart from the first region R1 by 80 degrees (θ1) in a clockwise direction around the center C1 of the stator 30. In addition, the protruding portions 101c, 102c, 103c of the first to third terminals 132, 134, 136 of the third terminal group 130 can be disposed in a third region R3 of the bus bar holder 42 defined to be spaced apart from the second region R2 by 80 degrees (θ2) in a clockwise direction around the center C1 of the stator 30.

[0135] Therefore, since the angular distance between the first region R1 and the second region R2 is defined to be the same as the angular distance between the second region R2 and the third region R3, the terminal portions 101b, 102b, 103b of the plurality of terminal groups 110, 120, 130 can be disposed symmetrically about the center C1 of the stator 30.

[0136] In addition, according to the exemplary embodiment, the sum (θ1+θ2) of the angular distance (θ1) between the first region R1 and the second region R2 and the angular distance (θ2) between the second region R2 and the third region R3 can be defined to be less than the angular distance (θ3) between the first region R1 and the third region R3.

[0137] As an example, the angular distance (θ1) between the first region R1 and the second region R2 can be defined to be 80 degrees around the center C1 of the stator 30, and the angular distance (θ3) between the first region R1 and the third region R3 can be defined to be 200 degrees.

[0138] Therefore, since the angular distance between the first region R1 and the second region R2 is smaller than the angular distance between the first region R1 and the third region R3, the terminal portions 101b, 102b, 103b of the plurality of terminal groups 110, 120, 130 can be symmetrically disposed about the center Cl of the stator 30.

[0139] Meanwhile, referring to Figures 11 to 14 In the bus bar holder 42, the layout of the terminal portions 101b, 102b, 103b of the first to third terminals 112, 114, 116, 122, 124, 126, 132, 134, 136 and the terminal portions 104b of the neutral terminals 118, 128, 138 can be variously changed according to required conditions and design specifications.

[0140] Referring to Figure 11 , the terminal portions 101b, 102b, 103b of the first to third terminals 112, 114, 116, 122, 124, 126, 132, 134, 136 and the terminal portions 104b of the neutral terminals 118, 128, 138 can be disposed on the bus bar holder 42 to form a double-layer structure (a multi-layer structure). In this case, the terminal portions 101b, 102b, 103b of the first to third terminals 112, 114, 116, 122, 124, 126, 132, 134, 136 and the terminal portions 104b of the neutral terminals 118, 128, 138 can protrude from the outer side surface of the bus bar holder 42.

[0141] Referring to Figure 12 , the terminal portions 101b, 102b, 103b of the first to third terminals 112, 114, 116, 122, 124, 126, 132, 134, 136 and the terminal portions 104b of the neutral terminals 118, 128, 138 can be disposed on the bus bar holder 42 to form a double-layer structure (a multi-layer structure). In this case, the terminal portions 101b, 102b, 103b of the first to third terminals 112, 114, 116, 122, 124, 126, 132, 134, 136 and the terminal portions 104b of the neutral terminals 118, 128, 138 can also protrude from the inner side surface of the bus bar holder 42.

[0142] Referring to Figure 13Terminal portions 101b, 102b, and 103b of the first to third terminals 112, 114, 116, 122, 124, 126, 132, 134, and 136, and terminal portion 104b of the neutral terminals 118, 128, and 138, can be disposed on the busbar holder 42 to form a single-layer structure. In this case, terminal portions 101b, 102b, and 103b of the first to third terminals 112, 114, 116, 122, 124, 126, 132, 134, and 136 can protrude from the inner surface of the busbar holder 42, and terminal portion 104b of the neutral terminals 118, 128, and 138 can protrude from the outer surface of the busbar holder 42.

[0143] According to another embodiment, terminal portions 101b, 102b, and 103b of the first to third terminals 112, 114, 116, 122, 124, 126, 132, 134, and 136, and terminal portion 104b of the neutral terminals 118, 128, and 138, can be disposed on the busbar holder 42 to form a single-layer structure. Furthermore, terminal portions 101b, 102b, and 103b of the first to third terminals 112, 114, 116, 122, 124, 126, 132, 134, and 136 can also protrude from the outer surface of the busbar holder 42, and terminal portion 104b of the neutral terminals 118, 128, and 138 can also protrude from the inner surface of the busbar holder 42.

[0144] Reference Figure 14 Only the terminal portions 101b, 102b, and 103b of the first to third terminals 112, 114, 116, 122, 124, 126, 132, 134, and 136 are inserted into the injection mold together with the busbar holder 42, and the terminal portion 104b of the neutral terminals 118, 128, and 138 can be disposed outside the busbar holder 42.

[0145] As an example, a recessed groove 42b can be formed in one side of the upper surface of the busbar holder 42, and the terminal portions 104b of the neutral terminals 118, 128, and 138 can be disposed in the groove 42b. Additionally, a vertically extending hole 42a can be formed in the busbar holder 42, and the coil 31 of the stator 30 can be disposed through the hole 42a and fused to the terminal portions 104b of the neutral terminals 118, 128, and 138. Figure 14 As shown, a stepped structure can be formed in the busbar holder 42, and the terminal portions 104b of the neutral terminals 118, 128, and 138 can be disposed on the stepped structure. In this case, the terminal portions 104b of the neutral terminals 118, 128, and 138 disposed on the stepped structure can be connected to the coil through the hole 42a.

[0146] According to another embodiment, the terminal portion 104b of the neutral terminal 118, 128, 138 can also be inserted into injection molding together with the bus bar holder 42, and the terminal portions 101b, 102b, 103b of the first to third terminals 112, 114, 116, 122, 124, 126, 132, 134, 136 can also be provided outside the bus bar holder 42.

[0147] Figures 15 to 19 is a view for describing a motor according to a second embodiment. Also, components identical or corresponding to the above-described components will be indicated by the same reference numerals, and redundant descriptions will be omitted.

[0148] Referring to Figures 15 to 19 , the motor according to the second embodiment can include a stator 30 and a bus bar 40 disposed on the stator 30, the bus bar 40 can include a bus bar holder 42 and a first terminal group 110, a second terminal group 120, and a third terminal group 130 coupled to the bus bar holder 42, and the first terminal group 110, the second terminal group 120, and the third terminal group 130 can include first to third terminals 112, 114, 116, 122, 124, 126, 132, 134, 136 having terminal portions 101b, 102b, 103b, and the terminal portion 101b of the first terminal 122 of the second terminal group 120 can be disposed between the terminal portion 101b of the first terminal 112 of the first terminal group 110 and the terminal portion 101b of the first terminal 132 of the third terminal group 130.

[0149] Referring to Figure 16 , the first terminal group 110 can include a first terminal 112 (e.g., U1 phase), a second terminal 114 (e.g., V1 phase), a third terminal 116 (e.g., W1 phase), and a neutral terminal, in which the terminal portions 101b, 102b, 103b of the first terminal 112, the second terminal 114, and the third terminal 116 are disposed at intervals of 120 degrees around the center C1 of the stator 30. That is, the first terminal group 110 can include a first terminal 112 (e.g., U1 phase), a second terminal 114 (e.g., V1 phase), a third terminal 116 (e.g., W1 phase), and a neutral terminal. Also, the terminal portion 101b of the first terminal 112, the terminal portion 102b of the second terminal 114, and the terminal portion 103b of the third terminal 116 can be disposed at intervals of 120 degrees.

[0150] Referring to Figure 17, the second terminal group 120 can include a first terminal 122 (for example, U2 phase), a second terminal 124 (for example, V2 phase), a third terminal 126 (for example, W2 phase), and a neutral terminal, in which the terminal portions 101b, 102b, 103b of the first terminal 122, the second terminal 124, and the third terminal 126 are disposed at intervals of 120 degrees around the center Cl of the stator 30. That is, the second terminal group 120 can include a first terminal 122 (for example, U2 phase), a second terminal 124 (for example, V2 phase), a third terminal 126 (for example, W2 phase), and a neutral terminal. In addition, the terminal portion 101b of the first terminal 122, the terminal portion 102b of the second terminal 124, and the terminal portion 103b of the third terminal 126 can be disposed at intervals of 120 degrees in the circumferential direction.

[0151] Referring to Figure 18 , the third terminal group 130 includes a first terminal 132 (for example, U3 phase), a second terminal 134 (for example, V3 phase), a third terminal 136 (for example, W3 phase), and a neutral terminal, in which the terminal portions 101b, 102b, 103b of the first terminal 132, the second terminal 134, and the third terminal 136 are disposed at intervals of 120 degrees around the center Cl of the stator 30. That is, the third terminal group 130 includes a first terminal 132 (for example, U3 phase), a second terminal 134 (for example, V3 phase), a third terminal 136 (for example, W3 phase), and a neutral terminal. In addition, the terminal portion 101b of the first terminal 132, the terminal portion 102b of the second terminal 134, and the terminal portion 103b of the third terminal 136 can be disposed at intervals of 120 degrees in the circumferential direction.

[0152] For reference, in the present embodiment, the meaning that the terminal portions 101b, 102b, 103b of the first terminals 112, 122, 132, the second terminals 114, 124, 134, and the third terminals 116, 126, 136 of the terminal groups 110, 120, 130 are arranged at intervals of 120 degrees is defined as the terminal portions 101b, 102b, 103b of the first terminals 112, 122, 132, the second terminals 114, 124, 134, and the third terminals 116, 126, 136 are disposed at intervals of 120 degrees around the center (or the center of the bus bar) of the stator 30.

[0153] Since the terminal portion 101b of the first terminal 122 of the second terminal group 120 is disposed between the terminal portion 101b of the first terminal 112 of the first terminal group 110 and the terminal portion 101b of the first terminal 132 of the third terminal group 130, the terminal portion 102b of the second terminal 124 of the second terminal group 120 can be disposed between the terminal portion 102b of the second terminal 114 of the first terminal group 110 and the terminal portion 102b of the second terminal 134 of the third terminal group 130, and the terminal portion 103b of the third terminal 126 of the second terminal group 120 can be disposed between the terminal portion 103b of the third terminal 116 of the first terminal group 110 and the terminal portion 103b of the third terminal 136 of the third terminal group 130.

[0154] As an example, the terminal portion 101b of the first terminal 112 of the first terminal group 110 can be disposed in the 12 o'clock direction. In addition, the terminal portion 101b of the first terminal 122 of the second terminal group 120 can be disposed between the terminal portion 101b of the first terminal 132 of the third terminal group 130 and the terminal portion 101b of the first terminal 112 of the first terminal group 110, where the terminal portion 101b of the first terminal 132 of the third terminal group 130 is disposed at an 80-degree interval in the clockwise direction from the terminal portion 101b of the first terminal 112 of the first terminal group 110 about the center C1 of the stator 30.

[0155] Therefore, in the present embodiment, since the terminal portion 101b of the first terminal 122 of the second terminal group 120 is disposed between the terminal portion 101b of the first terminal 112 of the first terminal group 110 and the terminal portion 101b of the first terminal 132 of the third terminal group 130, the terminal portions 101b, 102b, 103b of the plurality of terminal groups 110, 120, 130 can be disposed symmetrically about the center C1 of the stator 30, and therefore the current can be supplied symmetrically through the plurality of terminal groups 110, 120, 130 about the center C1 of the stator 30.

[0156] In addition, the protruding portions 101c, 102c, 103c of the first to third terminals 112, 114, 116 of the first terminal group 110 are disposed in the first region R1 of the bus bar holder 42, the protruding portions 101c, 102c, 103c of the first to third terminals 122, 124, 126 of the second terminal group 120 are disposed in the second region R2 of the bus bar holder 42, the protruding portions 101c, 102c, 103c of the first to third terminals 132, 134, and 134 of the third terminal group 130 are disposed in the third region R3 of the bus bar holder 42, and the angular distance (e.g., 40 degrees) between the first region R1 and the second region R2 and the angular distance (e.g., 40 degrees) between the second region R2 and the third region R3 are the same.

[0157] As an example, the protruding portions 101c, 102c, 103c of the first to third terminals 112, 114, 116 of the first terminal group 110 can be provided in a first region R1 defined in the 12 o'clock direction of the bus bar holder 42 (in the Figure 15 In addition, the protruding portions 101c, 102c, 103c of the first to third terminals 122, 124, 126 of the second terminal group 120 can be provided in a second region R2 defined to be spaced apart from the first region R1 by 40 degrees in the clockwise direction around the center C1 of the stator 30. In addition, the protruding portions 101c, 102c, 103c of the first to third terminals 132, 134, 136 of the third terminal group 130 can be provided in a third region R3 defined to be spaced apart from the second region R2 by 40 degrees in the clockwise direction around the center C1 of the stator 30.

[0158] Therefore, the first region R1, the second region R2, and the third region R3 can be provided in the first quadrant region among the quadrant regions divided by the orthogonal axes (x-axis and y-axis) passing through the center (C1) of the stator 30. Therefore, since the first region R1, the second region R2, and the third region R3 are provided to be concentrated in the first quadrant region, it is possible to obtain the advantageous effects of simplifying the process of connecting the terminal groups 110, 120, 130 with the external power cable and improving workability and convenience.

[0159] According to another embodiment, the first region R1, the second region R2, and the third region R3 can also be provided in the second quadrant region, the third quadrant region, or the fourth quadrant region among the quadrant regions divided by the orthogonal axes (x-axis and y-axis) passing through the center C1 of the stator 30.

[0160] Figures 19 to 24 is a view for describing a motor according to a third embodiment, and Figures 25 to 31 is a view for describing a motor according to a fourth embodiment of the present application. In addition, components identical to or corresponding to the above-described components will be denoted by the same reference numerals, and redundant descriptions will be omitted.

[0161] Referring to Figures 19 to 24According to the third embodiment, the motor can include a stator 30 and a busbar 40 disposed on the stator 30. Also, the busbar 40 can include a busbar holder 42 and a first terminal set 110, a second terminal set 120, a third terminal set 130, and a fourth terminal set 140 coupled to the busbar holder 42. Also, the first terminal set 110, the second terminal set 120, the third terminal set 130, and the fourth terminal set 140 can include first to third terminals 112, 114, 116, 118, 122, 124, 126, 128, 132, 134, 136, 138, 142, 144, 146, and 148 having terminal portions 101b, 102b, 103b, and 104b.

[0162] The first terminal set 110, the second terminal set 120, the third terminal set 130, and the fourth terminal set 140 can be circuit-divided from each other. Also, the first terminal set 110, the second terminal set 120, the third terminal set 130, and the fourth terminal set 140 can include a plurality of terminals 112, 114, 116, 118, 122, 124, 126, 128, 132, 134, 136, 138, 142, 144, 146, and 148 having terminal portions 101b, 102b, 103b, and 104b.

[0163] More specifically, the first terminal set 110 includes three phase terminals 112, 114, 116 and one neutral terminal 118, the second terminal set 120 includes three phase terminals 122, 124, 126 and one neutral terminal 128, and the third terminal set 130 includes three phase terminals 132, 134, 136 and one neutral terminal 138, and the fourth terminal set 140 includes three phase terminals 142, 144, and 146 and one neutral terminal 148.

[0164] Referring to Figure 26 The first terminal set 110 includes a first terminal 112 (e.g., U1 phase), a second terminal 114 (e.g., V1 phase), a third terminal 116 (e.g., W1 phase), and a neutral terminal 118, in which the terminal portions 101b, 102b, 103b of the first terminal 112, the second terminal 114, and the third terminal 116 are disposed at intervals of 120 degrees about the center C1 of the stator 30.

[0165] Referring to Figure 27 The second terminal set 120 includes a first terminal 122 (e.g., U2 phase), a second terminal 124 (e.g., V2 phase), a third terminal 126 (e.g., W2 phase), and a neutral terminal 128, in which the terminal portions 101b, 102b, 103b of the first terminal 122, the second terminal 124, and the third terminal 126 are disposed at intervals of 120 degrees about the center C1 of the stator 30.

[0166] Referring to Figure 28 , the third terminal group 130 includes a first terminal 132 (e.g., U3 phase), a second terminal 134 (e.g., V3 phase), a third terminal 136 (e.g., W3 phase), and a neutral terminal 138, in which the terminal portions 101b, 102b, 103b of the first terminal 132, the second terminal 134, and the third terminal 136 are disposed at intervals of 120 degrees around the center C1 of the stator 30.

[0167] Referring to Figure 29 , the fourth terminal group 140 includes a first terminal 142 (e.g., U4 phase), a second terminal 144 (e.g., V4 phase), a third terminal 146 (e.g., W4 phase), and a neutral terminal 148, in which the terminal portions 101b, 102b, 103b of the first terminal 142, the second terminal 144, and the third terminal 146 are disposed at intervals of 120 degrees around the center C1 of the stator 30.

[0168] For reference, in the present embodiment, the meaning that the terminal portions 101b, 102b, 103b of the first terminals 112, 122, 132, 142, the second terminals 114, 124, 134, 144, and the third terminals 116, 126, 136, 146 of the terminal groups 110, 120, 130, 140 are arranged at intervals of 120 degrees is defined as the terminal portions 101b, 102b, 103b of the first terminals 112, 122, 132, 142, the second terminals 114, 124, 134, 144, and the third terminals 116, 126, 136, 146 are arranged at intervals of 120 degrees around the center (or the center of the bus bar) of the stator 30.

[0169] The first terminals 112, 122, 132, the second terminals 114, 124, 134, and the third terminals 116, 126, 136 of the first terminal group 110 to the third terminal group 130 include a body 101a, 102a, 103a, a terminal portion 101b, 102b, 103b extending from one side of the body 101a, 102a, 103a, and a protruding portion 101c, 102c, 103c extending from the other side of the body 101a, 102a, 103a (see Figures 3 to 5 ).

[0170] Each of the neutral terminals 118, 128, 138 of the first terminal group 110 to the third terminal group 130 includes a body 104a and three terminal portions 104b extending from one side of the body 104a (see Figure 6 ).

[0171] In addition, referring to Figure 29The first terminal 142, the second terminal 144, and the third terminal 146 of the fourth terminal group 140 include a body 101a, 102a, 103a, a terminal portion 101b, 102b, 103b extending from one side of the body 101a, 102a, 103a, and a protruding portion 101c, 102c, 103c protruding from the other side of the body 101a, 102a, 103a.

[0172] The bodies 101a, 102a, 103a of the terminals 142, 144, and 146 of the fourth terminal group 140 can each be formed as a straight band type member or a band type member having a curved surface. The bodies 101a, 102a, 103a, the terminal portions 101b, 102b, 103b, and the protruding portions 101c, 102c, 103c can be divided and described only according to their shape and functional characteristics, and can be one integrally connected member.

[0173] For example, the body 101a of the first terminal 142 of the fourth terminal group 140 can be formed as a straight band type member. However, the bodies 102a and 103a of the second terminal 144 and the third terminal 146 of the fourth terminal group 140 can each be formed as a band type member in an arc shape having a predetermined curvature.

[0174] The terminal portions 101b, 102b, 103b of the terminals 142, 144, 146 of the fourth terminal group 140 extend from the side surface (the outer side surface or the inner side surface) of the body 101a in the radial direction of the stator 30 to protrude from the outer side surface (or the inner side surface) of the bus bar holder 42, and the end portion of the terminal portion 101b, 102b, 103b of the terminals 142, 144, 146 of the fourth terminal group 140 is each formed in a curved shape such as a hook shape.

[0175] The terminal portions 101b, 102b, 103b of the terminals 142, 144, 146 of the fourth terminal group 140 are electrically connected to the coils 31 of the stator 30. As an example, the terminal portions 101b, 102b, 103b of the terminals 142, 144, 146 of the fourth terminal group 140 can be welded to the coils 31 of the stator 30.

[0176] The protruding portions 101c, 102c, 103c of the terminals 142, 144, and 146 of the fourth terminal group 140 can be provided to extend in the vertical direction from the upper surface of the body and to protrude from the upper surface of the bus bar holder 42. The protruding portions 101c, 102c, 103c of the terminals 142, 144, 146 of the fourth terminal group 140 are connected to the external power cable of the corresponding U-phase, V-phase, W-phase.

[0177] The neutral terminal 148 of the fourth terminal group 140 includes the body 104a and three terminal portions 104b extending from one side of the body 104a. As an example, the body 104a of the neutral terminal 148 of the fourth terminal group 140 can be formed as a band-shaped member in an arc shape having a predetermined curvature.

[0178] The terminal portions 104b of the neutral terminal 148 of the fourth terminal group 140 can extend in the radial direction of the stator 30 from the side surface (the outer side surface or the inner side surface) of the body 104a of the neutral terminal and protrude from the outer side surface (or the inner side surface) of the bus bar holder 42. In this case, the end portions of the terminal portions 104b of the neutral terminal 148 of the fourth terminal group 140 can each be formed in a curved shape such as a hook shape.

[0179] The terminal portions 104b of the neutral terminal 148 of the fourth terminal group 140 are electrically connected to the coils 31 of the stator 30. As an example, the terminal portions 104b of the neutral terminal 148 of the fourth terminal group 140 can be welded to the coils 31 of the stator 30.

[0180] According to the example embodiment, the protruding portions 101c, 102c, 103c of the first to third terminals 112, 114, 116 of the first terminal group 110 can be provided in the first region R1 of the bus bar holder 42, the protruding portions 101c, 102c, 103c of the first to third terminals 122, 124, 126 of the second terminal group 120 can be provided in the second region R2 of the bus bar holder 42, the protruding portions 101c, 102c, 103c of the first to third terminals 132, 134, 136 of the third terminal group 130 can be provided in the third region R3 of the bus bar holder 42, and the protruding portions 101c, 102c, 103c of the first to third terminals 142, 144, and 142 of the fourth terminal group 140 can be provided in the fourth region R4 of the bus bar holder 42. In this case, the intervals between the first region R1 to the fourth region R4 from each other can be the same.

[0181] As an example, with reference to Figure 25 , the protruding portions 101c, 102c, 103c of the first to third terminals 112, 114, 116 of the first terminal group 110 can be provided in the first region R1 of the bus bar holder 42 defined in the 12 o'clock direction (in the Figure 25In addition, the protruding portions 101c, 102c, 103c of the first to third terminals 122, 124, 126 of the second terminal group 120 can be provided in a second region R2 of the bus bar holder 42 defined to be spaced apart from the first region Rl by 90 degrees in the counterclockwise direction around the center CI of the stator 30. In addition, the protruding portions 101c, 102c, 103c of the first to third terminals 132, 134, 136 of the third terminal group 130 can be provided in a third region R3 of the bus bar holder 42 defined to be spaced apart from the second region R2 by 90 degrees in the counterclockwise direction around the center CI of the stator 30. In addition, the protruding portions 101c, 102c, and 103c of the first to third terminals 142, 144, and 146 of the fourth terminal group 140 can be provided in a fourth region R4 of the bus bar holder 42 defined to be spaced apart from the third region R3 by 90 degrees in the counterclockwise direction around the center CI of the stator 30.

[0182] Therefore, since the first region Rl, the second region R2, the third region R3, and the fourth region R4 are spaced apart from each other by the same distance, the terminal portions 101b, 102b, 103b of the plurality of terminal groups 110, 120, 130, 140 can be symmetrically provided with respect to the center CI of the stator 30.

[0183] The layout of the terminal portions 101b, 102b, 103b of the terminal groups 110, 120, 130, 140 can be variously changed according to required conditions and design specifications.

[0184] For example, with reference to Figure 25 , the terminal portions 101b, 102b, 103b of one of the second terminal 134 or the third terminal 136 of the third terminal group 130 and the second terminal 144 or the third terminal 146 of the fourth terminal group 140 can be provided between the terminal portion 101b of the first terminal 112 of the first terminal group 110 and the terminal portion 101b of the first terminal 122 of the second terminal group 120.

[0185] As an example, the terminal portion 101b of the first terminal 112 of the first terminal group 110 can be disposed in the 12 o'clock direction. In addition, the terminal portion 102b of the second terminal 134 of the third terminal group 130 and the terminal portion 103b of the third terminal 146 of the fourth terminal group 140 can be disposed between the terminal portion 101b of the first terminal 122 of the second terminal group 120 and the terminal portion 101b of the first terminal 112 of the first terminal group 110, which is disposed at a 90-degree angle in the counterclockwise direction from the terminal portion 101b of the first terminal 112 of the first terminal group 110 about the center CI of the stator 30.

[0186] Therefore, in the present embodiment, since the terminal portion 102b, 103b of one of the second terminal 134 or the third terminal 136 of the third terminal group 130 and the terminal portion 102b, 103b of one of the second terminal 144 or the third terminal 146 of the fourth terminal group 140 are disposed between the terminal portion 101b of the first terminal 112 of the first terminal group 110 and the terminal portion 101b of the first terminal 122 of the second terminal group 120, the terminal portions 101b, 102b, 103b of the plurality of terminal groups 110, 120, 130, 140 can be symmetrically disposed about the center CI of the stator 30. Therefore, the current can be symmetrically supplied through the plurality of terminal groups 110, 120, 130, 140 about the center CI of the stator 30.

[0187] In the above-described and illustrated embodiments, although an example in which the terminal portion 102b of the second terminal 134 of the third terminal group 130 and the terminal portion 103b of the third terminal 146 of the fourth terminal group 140 are disposed between the terminal portion 101b of the first terminal 112 of the first terminal group 110 and the terminal portion 101b of the first terminal 122 of the second terminal group 120 is described, the present application is not necessarily limited thereto. For example, as illustrated in Figure 32 the terminal portion 103b of the third terminal 136 of the third terminal group 130 and the terminal portion 102b of the second terminal 144 of the fourth terminal group 140 can also be disposed between the terminal portion 101b of the first terminal 112 of the first terminal group 110 and the terminal portion 101b of the first terminal 122 of the second terminal group 120.

[0188] Alternatively, as illustrated in Figure 33 the terminal portion 102b of the second terminal 134 of the third terminal group 130 and the terminal portion 102b of the second terminal 144 of the fourth terminal group 140 can also be disposed between the terminal portion 101b of the first terminal 112 of the first terminal group 110 and the terminal portion 101b of the first terminal 122 of the second terminal group 120.

[0189] Alternatively, as shown in FIG. 1B, the terminal portion 102b of the second terminal 144 of the fourth terminal group 140 and the terminal portion 101b of the first terminal 132 of the third terminal group 130 can also be disposed between the terminal portion 101b of the first terminal 112 of the first terminal group 110 and the terminal portion 101b of the first terminal 122 of the second terminal group 120 to apply the power of the V-phase V4 of the fourth terminal group 140 and the power of the W-phase W3 of the third terminal group 130. Figure 30

[0190] Meanwhile, referring to FIG. 1B, the first terminal group 110, the second terminal group 120, the third terminal group 130, and the fourth terminal group 140 can be disposed to form different layers in the axial direction of the shaft 10. Figure 34

[0191] This is to arrange the terminal portions 101b, 102b, 103b, 104b of the plurality of terminal groups 110, 120, 130, 140 not to overlap in the axial direction of the shaft 10.

[0192] That is, when the plurality of terminal groups 110, 120, 130, 140 are disposed on a single layer, since the phase terminals and the neutral terminal constituting the terminal groups should have different structures and sizes (for example, different curvatures), it is difficult to commonly use only one type of terminal group to manufacture the terminal unit 100 including the plurality of terminal groups 110, 120, 130, 140 divided by a circuit, and the plurality of terminal groups 110, 120, 130, 140 should be separately manufactured.

[0193] However, in this embodiment, since the plurality of terminal groups 110, 120, 130, 140 are disposed on different layers, only one type of terminal group can be commonly used to manufacture the terminal unit 100 including the plurality of terminal groups 110, 120, 130, 140 divided by a circuit, and the terminal portions 101b, 102b, 103b, 104b of the terminal groups 110, 120, 130, 140 can be disposed not to overlap in the axial direction of the shaft 10.

[0194] According to an exemplary embodiment, the first terminal group 110 is disposed to form a first layer F1, the second terminal group 120 is disposed to form a second layer F2 below the first terminal group 110, the third terminal group 130 is disposed to form a third layer F3 below the second terminal group 120, and the fourth terminal group 140 is disposed to form a fourth layer F4 below the third terminal group 130.

[0195] ​​For reference, in the present embodiment, an example has been described in which the first terminal group 110 is provided on the first layer positioned at the uppermost portion and the fourth terminal group 140 is provided on the fourth layer F4 positioned at the lowermost portion, but the fourth terminal group 140 can also be provided on the first layer, and the first terminal group 110 can also be provided on the fourth layer.

[0196] Preferably, the first layer F1 can include a first upper layer F1-1 in which a plurality of first phase terminals are provided, and a first lower layer F1-2 positioned below the first upper layer F1-1, and the first upper layer F1-1 in which a first neutral terminal 118 is provided.

[0197] As an example, a lower portion of the first upper layer F1-1 and an upper portion of the first lower layer F1-2 can be provided to overlap each other in the radial direction. Since the lower portion of the first upper layer F1-1 and the upper portion of the first lower layer F1-2 overlap each other, the total height of the busbar 40 can be reduced, and thus the motor can be further downsized. According to another embodiment, the first upper layer and the first lower layer can also not overlap and can be completely separated from each other.

[0198] Similar to the first layer F1, the second layer F2 can include a second upper layer F2-1 in which a plurality of second phase terminals are provided, and a second lower layer F2-2 positioned below the second upper layer F2-1 and provided with a second neutral terminal 128. In addition, the third layer F3 can include a third upper layer F3-1 in which a plurality of third phase terminals are provided, and a third lower layer F3-2 positioned below the third upper layer F3-1 and provided with a third neutral terminal 138. In addition, the fourth layer F4 can include a fourth upper layer F4-1 in which a plurality of fourth phase terminals are provided, and a fourth lower layer F4-2 positioned below the fourth upper layer F4-1 and provided with a fourth neutral terminal 148.

[0199] In addition, in a structure in which the first terminal group 110, the second terminal group 120, the third terminal group 130, and the fourth terminal group 140 are stacked to form different layers, the busbar holder 42 constituting the busbar 40 can be formed to surround the entire first terminal group 110, the second terminal group 120, the third terminal group 130, and the fourth terminal group 140.

[0200] In the above-described and illustrated embodiments, although an example has been described in which the plurality of terminal groups 110, 120, 130, 140 are connected by only one bus bar holder 42, the present application is not necessarily limited thereto. For example, according to another embodiment, there is also a configuration in which the plurality of terminal groups are connected using different bus bar holders.

[0201] Referring to Figure 35 According to another embodiment, the motor includes a first bus bar holder 43 formed to surround the first terminal group 110, a second bus bar holder 44 formed to surround the second terminal group 120, a third bus bar holder 45 formed to surround the third terminal group 130, and a fourth bus bar holder 46 formed to surround the fourth terminal group 140.

[0202] The first bus bar holder 43 to the fourth bus bar holder 46 can be stacked in order to constitute the bus bar 40.

[0203] Preferably, a first protrusion 43a can be formed on a lower portion of the first bus bar holder 43, a first groove 44a into which the first protrusion 43 is inserted can be formed in an upper portion of the second bus bar holder 44, a second protrusion 44b can be formed on a lower portion of the second bus bar holder 44 to be disposed at a different position from the first protrusion 43a, a second groove 45a into which the second protrusion 44b is inserted can be formed on an upper portion of the third bus bar holder 45, a third protrusion 45b can be formed on a lower portion of the third bus bar holder 45 to be disposed at a different position from the second protrusion 44b, and a third groove 46a into which the third protrusion 45b is inserted can be formed in an upper portion of the fourth bus bar holder 46.

[0204] In this case, the meaning that the second protrusion 44b is arranged at a different position from the first protrusion 43a is defined as disposing the second protrusion 44b and the first protrusion 43a not to overlap each other in the axial direction of the shaft 10. Similarly, the meaning that the third protrusion 45b is arranged at a different position from the second protrusion 44b is defined as disposing the third protrusion 45b and the second protrusion 44b not to overlap in the axial direction of the shaft 10.

[0205] When the first bus bar holder 43 to the fourth bus bar holder 46 are assembled, the first protrusion 43a to the third protrusion 45b and the first groove 44a to the third groove 46a are disposed to guide the assembly position and prevent erroneous assembly.

[0206] The protrusions can be inserted into the corresponding grooves only in the case where the plurality of bus bar holders 43, 44, 45, and 46 are disposed at regular positions.

[0207] That is, the third protruding portion 45b can be accommodated in the third recess 46a only when the third bus bar holder 45 is disposed on the fourth bus bar holder 46, and the second protruding portion 44b is not accommodated in the third recess 46a when the second bus bar holder 44 is disposed on the fourth bus bar holder 46. Similarly, the second protruding portion 44b can be accommodated in the second recess 45a only when the second bus bar holder 44 is disposed on the third bus bar holder 45, and the first protruding portion 43a can be accommodated in the first recess 44a only when the first bus bar holder 43 is disposed on the second bus bar holder 44.

[0208] Therefore, since the protruding portions are inserted into the corresponding recesses only when the plurality of bus bar holders 43, 44, 45, and 46 are disposed at regular positions, an advantageous effect of preventing erroneous assembly of the first to fourth bus bar holders 43 to 46 and improving the assemblability of the first to fourth bus bar holders 43 to 46 can be obtained.

[0209] Although the present application has been described above with reference to exemplary embodiments, it will be understood by those skilled in the art that various modifications and changes can be made thereto without departing from the spirit and scope of the present application, which are defined by the appended claims.

[0210] Reference numerals

[0211] 10: shaft, 20: rotor, 30: stator, 31: coil, 40: bus bar, 42: bus bar holder, 50: housing, 101a, 102a, 103a, 104a: body, 101b, 102b, 103b, 104b: terminal portion, 101c, 102c, 103c: protruding portion, 110: first terminal group, 120: second terminal group, 130: third terminal group, 140: fourth terminal group, 112, 122, 132, 142: first terminal, 114, 124, 134, 144: second terminal, 116, 126, 136, 146: third terminal, 118, 128, 138, 148: neutral terminal.

Claims

1. A motor, comprising: stator; as well as Busbar, the busbar being disposed on the stator, The busbar includes a busbar holder and a first terminal group, a second terminal group, and a third terminal group connected to the busbar holder. The first terminal group, the second terminal group, and the third terminal group are circuit-separated. Each of the first terminal group, the second terminal group, and the third terminal group includes a first terminal, a second terminal, and a third terminal. Each of the first terminal, the second terminal, and the third terminal includes a body, a terminal portion of a coil disposed on one side of the body and connected to the stator, and a protrusion disposed on the other side of the body and connected to an external power source; The terminal portion of one of the first to third terminals of the second terminal group and the terminal portion of one of the first to third terminals of the third terminal group are disposed between the terminal portion of the first terminal of the first terminal group and the terminal portion of the second terminal of the first terminal group. in: The protruding portions of the first terminal to the third terminal of the first terminal group are disposed in the first region of the busbar holder; The protruding portions of the first terminal to the third terminal of the second terminal group are disposed in the second region of the busbar retainer; The protruding portions from the first terminal to the third terminal of the third terminal group are disposed in the third region of the busbar retainer; and The distance between the first region and the second region is the same as the distance between the second region and the third region.

2. The motor according to claim 1, wherein: The terminal portion extends from one side of the body; and The protruding portion extends from the other side of the body.

3. The motor according to claim 1, wherein, The shape of at least one of the first terminal, the second terminal, and the third terminal is different from the shape of the remaining terminals.

4. The motor according to claim 3, wherein, Two of the bodies of the first terminal, the second terminal, and the third terminal have the same length and are longer than the length of the remaining body.

5. The motor according to claim 1, wherein, The distance between the first region and the second region is less than the distance between the first region and the third region.

6. The motor according to claim 2, wherein: The busbar includes a fourth terminal group, which includes a first terminal, a second terminal, and a third terminal; and The first terminal group to the fourth terminal group are electrically insulated from each other.

7. The motor according to claim 6, wherein: Each of the first to third terminals of the fourth terminal group includes a body and a terminal portion and a protruding portion extending from the body; The terminal portion extends from one side of the body; and The protruding portion extends from the other side of the body.

8. The motor according to claim 7, wherein: The protruding portions of the first to third terminals of the fourth terminal group are disposed in the fourth region of the busbar retainer; and The distances from the first region to the fourth region are the same.

9. The motor according to claim 7, wherein, The terminal portion of the second terminal or one of the terminals in the third terminal group and the terminal portion of the second terminal or one of the terminals in the fourth terminal group are disposed between the terminal portion of the first terminal in the first terminal group and the terminal portion of the first terminal in the second terminal group.

10. The motor according to claim 9, wherein: The second terminal of the third terminal group, or one of the terminals in the third terminal group, is the second terminal; and The second terminal is one of the second terminals or the third terminals in the fourth terminal group.

11. The motor according to claim 9, wherein: The second terminal of the third terminal group, or one of the terminals in the third terminal group, is the second terminal; and The third terminal is one of the second or third terminals in the fourth terminal group.

12. The motor according to claim 1, wherein: The first terminal group, the second terminal group, and the third terminal group are configured to form different layers in the axial direction; The first layer, which includes the first terminal group, comprises a first upper layer and a first lower layer. The first upper layer contains a plurality of first phase terminals. The first lower layer is positioned below the first upper layer and contains a first neutral terminal. The lower segment of the first upper layer and the upper segment of the first lower layer are configured to overlap in the radial direction.

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