motor

Abstract

A motor can be provided, including a shaft, a rotor coupled to the shaft, a stator disposed outside the rotor, and a busbar disposed on an upper side of the stator, wherein the busbar includes terminals connected to coils of the stator, the terminals include first terminals and second terminals separated from each other in an electrical circuit, the first terminals include a first neutral terminal and a plurality of first phase terminals, the second terminals include a second neutral terminal and a plurality of second phase terminals, a first center of curvature of each of the plurality of first phase terminals is arranged to be different from each other, a second center of curvature of each of the plurality of second phase terminals is arranged to be different from each other, and a position of a center of curvature of the first neutral terminal and a position of a center of curvature of the second neutral terminal are the same.

Description

[0001] This application is a divisional application of the Chinese Patent Application for Invention No. 201880085255.9 with the applicant of LG Innotek Co., Ltd., the filing date of December 27, 2018, and the title of "Motor". TECHNICAL FIELD

[0002] The present application relates to a motor. BACKGROUND

[0003] An electric power steering (EPS) system ensures the steering stability of a vehicle and provides a quick boost force, so that a driver can stably drive. The EPS system drives a motor using an electric control unit (ECU) according to a driving state detected by a speed sensor, a torque angle sensor, a torque sensor, etc. to control the operation of a steering shaft of the vehicle.

[0004] The motor includes a rotor and a stator. A coil is wound around the stator. Connection end portions of the coil wound around the stator can be connected to a bus bar. The bus bar includes a body and a terminal. The terminal is connected to the connection end portions of the coil. In addition, the terminal can be connected to an external power source through a cable.

[0005] The terminal can be formed as 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, the two terminals combined as described above can be provided in the form of a circuit and separated to ensure the safety of the motor. In the case where an abnormality occurs in the circuit or an element connected to any one of the terminals, the motor can be driven through the other terminal. The two terminals are spatially separated from the body of the bus bar.

[0006] However, since the connection end portions of the terminals are provided at equidistant intervals, it can be necessary to have terminals having various shapes. In the case where the terminals have various shapes, there is a problem in that the number of molds increases, the cost increases, material loss is high, and the manufacturing process is complicated. In addition, during the process of injection-molding the bus bar, there is a problem in that it can be easy to occur an error in the positions of the two terminals, and it is difficult to visually check whether the position of the neutral terminal or the position of the phase terminals is correct. SUMMARY

[0007] TECHNICAL PROBLEM

[0008] The present application aims to provide a motor in which the shape of a terminal is uniform, which allows the correct position of the terminal to be ensured during the process of forming a bus bar, and which allows the assembly process to be simplified.

[0009] The purposes solved according to the embodiments are not limited to the above-described purposes, and other purposes not described above will be clearly understood by those skilled in the art according to the following description.

[0010] Technical Solution

[0011] One aspect of the present application provides a motor including a shaft, a rotor coupled to the shaft, a stator disposed outside the rotor, and a busbar disposed on the stator, wherein the busbar includes terminals connected to coils of the stator, the terminals including first terminals and second terminals separated from each other in an electrical circuit, the first terminals including a first neutral terminal and a plurality of first phase terminals, the second terminals including a second neutral terminal and a plurality of second phase terminals, first centers of curvature of the plurality of first phase terminals are disposed to be different, second centers of curvature of the plurality of second phase terminals are disposed to be different, and a position of a center of curvature of the first neutral terminal is the same as a position of a center of curvature of the second neutral terminal.

[0012] The position of the first center of curvature can be different from the position of the second center of curvature.

[0013] When a virtual line passing through the center of curvature of the first neutral terminal is referred to as a first reference line and when a virtual line perpendicular to the first reference line and passing through the center of curvature of the first neutral terminal is referred to as a second reference line, the first center of curvature can be disposed at either side of the first reference line, the second center of curvature can be disposed at the other side of the first reference line, and the first center of curvature and the second center of curvature can be disposed at either side of the second reference line.

[0014] When a virtual line passing through the center of curvature of the first neutral terminal is referred to as a first reference line and when a virtual line perpendicular to the first reference line and passing through the center of curvature of the first neutral terminal is referred to as a second reference line, the first center of curvature can be disposed at either side of the first reference line, the second center of curvature can be disposed at the other side of the first reference line, the first center of curvature can be disposed at either side of the second reference line, and the second center of curvature can be disposed at the other side of the second reference line.

[0015] The first center of curvature and the second center of curvature can be disposed to be rotationally symmetric with respect to the center of curvature of the first neutral terminal.

[0016] The first center of curvature and the second center of curvature can be disposed to be point-symmetric with respect to the center of curvature of the first neutral terminal.

[0017] Each of the first phase terminals and the second phase terminals can include a body and a protruding portion bent from the body in a radial direction with respect to the center of curvature of the first neutral terminal.

[0018] The first neutral terminal and the second neutral terminal can be disposed to be point-symmetric with respect to the center of curvature of the first neutral terminal.

[0019] Each of the first phase terminal and the second phase terminal can have a multi-layer structure, and the protruding portion provided on the second layer portion can be provided to span the upper side portion of the body provided on the first layer portion.

[0020] Any one of the plurality of protruding portions provided on any one of the plurality of first phase terminals can be disposed between one side end portion of the first neutral terminal and one side end portion of the second neutral terminal when viewed in the axial direction, and any one of the plurality of protruding portions provided on any one of the plurality of second phase terminals can be disposed between the other side end portion of the first neutral terminal and the other side end portion of the second neutral terminal.

[0021] The protruding portion can include a first end portion extending from the body in a radial direction, a second end portion protruding from the first end portion and electrically connected to a coil of the stator, and a third end portion branching from the second end portion and electrically connected to the power cable.

[0022] Each of the first phase terminal and the second phase terminal can include a body and a protruding portion bent from the body in a radial direction with respect to a center of curvature of the first neutral terminal, wherein the protruding portion can include a first end portion extending from the body in a radial direction, a second end portion protruding from the first end portion and electrically connected to a coil of the stator, and a third end portion branching from the second end portion and electrically connected to the power cable, and the second end portion of the first phase terminal and the second end portion of the second phase terminal can be disposed to be rotationally symmetrical with respect to the first center of curvature.

[0023] Advantageous effects

[0024] According to the embodiment, since terminals having the same shape are combined and formed to be connected to two separate circuits, an advantageous effect is provided in that the correct position of the terminals is secured during the process of forming the bus bar, and the assembly process is simplified.

[0025] Although the plurality of terminals have the same shape, it is easy to arrange the protruding portions of the terminals at equidistant intervals, and thus an advantageous effect of improving insulation stability is provided. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a side cross-sectional view illustrating a motor according to an embodiment.

[0027] Figure 2 is a perspective view illustrating Figure 1 the bus bar shown in FIG. 1. is a perspective view illustrating

[0028] Figure 3 is a view illustrating Figure 2 a terminal of the busbar shown in

[0029] Figure 4 is a view illustrating Figure 3 a neutral terminal shown in

[0030] Figure 5 is a view illustrating Figure 3 a phase terminal shown in

[0031] Figure 6 is a view illustrating a center of curvature of the neutral terminal.

[0032] Figure 7 is a view illustrating a center of curvature of the phase terminal.

[0033] Figure 8 is a plan view of the terminal to illustrate a position of a protruding portion of the phase terminal.

[0034] Figure 9 is a view illustrating Figure 3 an enlarged view of the terminal shown in

[0035] Figure 10 is a view illustrating Figure 2 a modified example of the terminal of the busbar shown in

[0036] Figure 11 is a view illustrating Figure 10 a first phase terminal and a second phase terminal that are rotationally symmetrical in the terminal shown in DETAILED DESCRIPTION

[0037] Hereinafter, exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings. The objects, particular advantages, and novel features of the present application will become more apparent to those skilled in the art from a reading of the following detailed description of exemplary embodiments and the accompanying drawings. In the description of the present application, it will be understood that when a detailed description of relevant known functions and constitutions is deemed unnecessary for the clarity of the conception of the present application, the detailed description is omitted.

[0038] It will be understood that, although the terms “first,” “second,” etc. can be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present application. As used herein, the term “and / or” includes a combination of one or more of the associated listed items or any of the associated listed items.

[0039] Figure 1 is a side cross-sectional view illustrating a motor according to an embodiment.

[0040] Referring to Figure 1 , a motor according to an embodiment can include a shaft 10, a rotor 20, a stator 30, and a bus bar 40.

[0041] The shaft 10 can be coupled to the rotor 20. When a current is supplied, an electrical interaction occurs between the rotor 20 and the stator 30, the rotor 20 rotates, and the shaft 10 rotates together with the rotor. The shaft 10 can be connected to a steering shaft of a vehicle and can transmit power to the steering shaft.

[0042] The rotor 20 rotates due to the electrical interaction with the stator 30.

[0043] The rotor 20 can include a rotor core and a magnet. The rotor core can be formed to have a shape in which a plurality of circular steel plates are stacked or to have one cylindrical shape. A hole in which the shaft 10 is coupled can be provided at a central portion of the rotor core. A protrusion for guiding the magnet can 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 provided at predetermined intervals along the circumference of the rotor core. The rotor 20 can include a can member that fixedly surrounds the magnet so that the magnet is not separated from the rotor core and exposure of the magnet is prevented.

[0044] The coil 31 can be wound around the stator 30 to cause the electrical interaction with the rotor 20. A specific structure of the stator 30 in which the coil 31 is wound will be described below. The stator 30 can include a stator core having a plurality of teeth. An annular yoke portion is provided in the stator core, and teeth in which a coil is wound around from the yoke toward the center of the teeth can be provided in the stator core. The teeth can be provided at predetermined intervals along the outer circumferential surface of the yoke portion. Meanwhile, the stator core can be provided as a plurality of thin steel plates that are stacked. In addition, the stator core can be provided as a plurality of separate cores that are coupled or connected.

[0045] The bus bar 40 can be provided on the stator 30. The bus bar 40 can include a terminal located in a body having an annular shape. In addition, the terminal of the bus bar 40 can include phase terminals connected to U-phase, V-phase, and W-phase power sources and a neutral terminal connecting the phase terminals.

[0046] The housing 50 can house the rotor 20 and the stator 30 therein.

[0047] The sensing magnet 60 is coupled to the shaft 10 to operate together with the rotor 20. The sensing magnet 60 is a device configured to detect the position of the rotor 20.

[0048] A sensor configured to detect a magnetic force of the sensing magnet 60 can be provided on the printed circuit board 70. In this case, the sensor can be a Hall integrated circuit (IC). The sensor detects a change in the N pole and the S pole of the sensing magnet 60 and generates a sensing signal.

[0049] Figure 2 is a perspective view illustrating the busbar shown in Figure 1 is a perspective view illustrating the busbar shown in

[0050] Referring to Figure 2 , the busbar 40 includes a terminal 41 and a body 42. The body 42 is a molded part formed by an injection molding process. The body 42 includes a hole 40a in a central portion thereof. The terminal 41 is provided in the body 42, and a portion of an end portion of the terminal 41 is provided to be exposed from the body 42. The body 42 can have a substantially ring shape. The body 42 can have a structure including a plurality of layers. For example, the body 42 can have a form in which a second layer portion 42b is stacked on a portion of an upper surface of a first layer portion 42a.

[0051] Figure 3 is a perspective view illustrating the busbar shown in Figure 2 is a view illustrating a terminal of the busbar shown in Figure 4 is a view illustrating a neutral terminal shown in Figure 3 is a view illustrating a phase terminal shown in Figure 5 is a view illustrating a phase terminal shown in Figure 3

[0052] Referring to Figures 1 to 3 , the terminal 41 can include a first terminal 100 and a second terminal 200. The first terminal 100 and the second terminal 200 are connected to the coil 31 of the stator 30, but are electrically separated from each other. In addition, the first terminal 100 and the second terminal 200 are arranged to be spatially separated.

[0053] The first terminal 100 can include one first neutral terminal 110 and three first phase terminals 120. The three first phase terminals 120 are connected to phases (U phase, V phase, and W phase) of a three-phase power source. The second terminal 200 can also include one second neutral terminal 210 and three second phase terminals 220. The three second phase terminals 220 are connected to the phases (U phase, V phase, and W phase) of the three-phase power source. The three first phase terminals 120 and the three second phase terminals 220 have the same shape. Accordingly, the first phase terminals 120 and the second phase terminals 220 can be manufactured using one mold. In addition, the first neutral terminal 110 and the second neutral terminal 210 have the same shape. The first neutral terminal 110 and the second neutral terminal 210 can also be manufactured using one mold. Since the first terminal 100 and the second terminal 200 have the same shape, and the phase terminals have the same shape, there are advantages in that a manufacturing process is simple and manufacturing costs are reduced.​

[0054] Referring to Figure 4 , each of the first neutral terminal 110 and the second neutral terminal 210 can include a body 1 and a protruding portion 2. The body 1 and the protruding portion 2 can be distinguished and described only according to shape and functional characteristics, and the body 1 and the protruding portion 2 can be vertically connected as one member.

[0055] The body 1 is a band-type member having a curved surface. The first neutral terminal 110 and the second neutral terminal 210 are relatively longer than the first phase terminal 120 and the second phase terminal 220. The protruding portion 2 is formed to extend from the body 1 in a radial direction with respect to a center (a center of curvature CO of the first neutral terminal 110) of the bus bar 40. Each of the first neutral terminal 110 and the second neutral terminal 210 can have a multi-layer structure. The body 1 can be positioned on a first layer portion F1 of each of the first neutral terminal 110 and the second neutral terminal 210. The protruding portion 2 can be positioned on a second layer portion F2 of each of the first neutral terminal 110 and the second neutral terminal 210. The protruding portion 2 can be electrically connected to a coil 31 (see Figure 1 ) of the stator 30 (see Figure 1 ). The protruding portion 2 can be welded to the coil 31 of the stator 30.

[0056] Referring to Figure 5 , each of the first phase terminal 120 and the second phase terminal 220 can include a body 3 and a protruding portion 4. The body 3 and the protruding portion 4 can be distinguished and described only according to shape and functional characteristics, and the body 3 and the protruding portion 4 can be vertically connected as one member.

[0057] The body 3 is a band-type member having a curved surface. The first phase terminal 120 and the second phase terminal 220 are relatively shorter than the first neutral terminal 110 and the second neutral terminal 210. The protruding portion 4 can include a first end portion 4a, a second end portion 4b, and a third end portion 4c. The first end portion 4a can be formed to extend from the body 3 in a radial direction with respect to a center (a center of curvature CO of the first neutral terminal 110) of the bus bar 40. The second end portion 4b protrudes from the first end portion 4a. An end of the second end portion 4b is bent to have a hook shape to be connected to the coil 31 (see Figure 1 ) of the stator 30 (see Figure 1 ). The second end portion 4b can be welded to the coil 31 (see Figure 1 ) of the stator 30 (see Figure 1). The third end portion 4c can branch upward from the first end portion 4a. The third end portion 4c is electrically connected to the power cable. Each of the first phase terminal 120 and the second phase terminal 220 can have a multi-layer structure. A portion of the body 3 and the second end portion 4b can be positioned on a first layer portion F1 of each of the first phase terminal 120 and the second phase terminal 220. Another portion of the body 3 and the first end portion 4a can be positioned on a second layer portion F2 of each of the first phase terminal 120 and the second phase terminal 220.

[0058] Figure 6 is a view illustrating a curvature center of a neutral terminal, and Figure 7 is a view illustrating a curvature center of a phase terminal.

[0059] Referring to Figure 6 , the curvature center CO of each of the first neutral terminal 110 and the second neutral terminal 210 corresponds to a center of a virtual circle extending from an inner circumferential surface of the body 1 and having a radius R1. Referring to Figure 7 , the first curvature center CI of the first phase terminal 120 and the second curvature center C2 of the second phase terminal 220 correspond to centers of vertical circles extending from an inner circumferential surface of the body 3 and having a radius R2.

[0060] Referring to Figures 3 to 6 , the first curvature center CI of the first phase terminal 120 is different from the second curvature center C2 of the second phase terminal 220. In addition, the curvature center CO of the first neutral terminal 110 is the same as the curvature center CO of the second neutral terminal 210. In addition, the positions of the curvature centers CIa, CIb, and CIc of the three first phase terminals 120A, 120B, and 120C of the first terminal 100 are different. In addition, the positions of the curvature centers C2a, C2b, and C2c of the three second phase terminals 220A, 220B, and 220C of the second terminal 200 are also different. This is to arrange and dispose the protruding portions 2 and 4 of the six phase terminals having the same shape and the two neutral terminals having the same shape in the circumferential direction and the radial direction of the busbar 40.

[0061] Specifically, the position of the first center of curvature C1 can be distinguished from the position of the second center of curvature C2 based on a first reference line L1 passing through the center of curvature C0 of the first neutral terminal 110 and the center of curvature C0 of the second neutral terminal 210. For example, the first terminal 100 and the second terminal 200 can be disposed such that the first center of curvature C1 is positioned at either side of the first reference line L1 and the second center of curvature C2 is positioned at the other side of the first reference line L1. In this case, the positions of the centers of curvature C1a, C1b, and C1c of the three first phase terminals 120A, 120B, and 120C are different. Also, the positions of the centers of curvature C2a, C2b, and C2c of the three second phase terminals 220A, 220B, and 220C are different.

[0062] The radii of curvature of the three first phase terminals 120A, 120B, and 120C are the same, but the positions of the centers of curvature C1a, C1b, and C1c are different. The positions of the centers of curvature C1a, C1b, and C1c are determined such that the protruding portions 4 of the three first phase terminals 120A, 120B, and 120C are aligned with the protruding portion 2 of the first neutral terminal 110 in the circumferential direction and the radial direction of the busbar 40.

[0063] Also, the radii of curvature of the three second phase terminals 220A, 220B, and 220C are the same, but the positions of the centers of curvature C2a, C2b, and C2c are different. The positions of the centers of curvature C2a, C2b, and C2c are determined such that the protruding portions 4 of the three second phase terminals 220A, 220B, and 220C are aligned with the protruding portion 2 of the second neutral terminal 210 in the circumferential direction and the radial direction of the busbar 40.

[0064] Meanwhile, the first neutral terminal 110 and the second neutral terminal 210 can be disposed to be rotationally symmetrical with respect to the center of curvature C0 of the first neutral terminal 110. For example, the first neutral terminal 110 and the second neutral terminal 210 can be disposed to be point symmetrical with respect to the center of curvature C0 of the first neutral terminal 110 such that any one of the first neutral terminal 110 and the second neutral terminal 210 overlaps the other when rotated by 180°.

[0065] Figure 8 is a plan view of the terminals to illustrate the positions of the protruding portions of the phase terminals.

[0066] Referring to Figure 8 , Figure 8 line A1 of FIG. 1 is a reference line connecting one side end portion of the first neutral terminal 110 and the center of curvature C0 of the first neutral terminal 110, and Figure 8 line A2 of FIG. 1 is a reference line connecting the other side end portion of the first neutral terminal 110 and the center of curvature C0 of the first neutral terminal 110.

[0067] In addition,A line B1 connecting one side end portion of the second neutral terminal 210 and the center of curvature CO of the first neutral terminal 110 is a reference line, and Figure 8 A line B2 connecting the other side end portion of the second neutral terminal 210 and the center of curvature CO of the first neutral terminal 110 is a reference line. Figure 8

[0068] Any one of the protruding portions 4 of the first phase terminals 120A, 120B, and 120C, for example, the protruding portion 4 disposed at the outermost side among the protruding portions 4 of the first phase terminals 120A, 120B, and 120C, can be disposed in a region SI corresponding to a region between the line Al and the line B1 based on the circumferential direction of the busbar 40.

[0069] In addition, any one of the protruding portions 4 of the second phase terminals 220A, 220B, and 220C, for example, the protruding portion 4 disposed at the outermost side among the protruding portions 4 of the second phase terminals 220A, 220B, and 220C, can be disposed in a region S2 corresponding to a region between the line A2 and the line B2 based on the circumferential direction of the busbar 40.

[0070] This is to align the protruding portions 2 of the first neutral terminal 110 and the protruding portions 2 of the second neutral terminal 210 (see Figure 4 ) with the protruding portions 4 of the first phase terminals 120 and the protruding portions 4 of the second phase terminals 220 (see Figure 4 ) in the circumferential direction and the radial direction of the busbar 40.

[0071] Figure 9 is an enlarged view illustrating the terminal shown in Figure 3 .

[0072] Referring to Figure 4 , Figure 5 , and Figure 9 , each of the first phase terminals 120 and the second phase terminals 220 has a multi-layer structure. The following description will be given based on the first phase terminal 120. The protruding portions 4 provided on the second layer portion F2 of the first phase terminal 120 are disposed to straddle the upper side portion of the body 3 provided on the first layer portion Fl of the other first phase terminal 120, or the upper side portion of the body 1 provided on the first layer portion Fl of the first neutral terminal 110. In this way, the plurality of phase terminals do not overlap each other at the intersection portion, or the phase terminals do not overlap the neutral terminal at the intersection portion.

[0073] Figure 10 is a view illustrating a modified example of the terminal of the busbar shown in Figure 2 .

[0074] With reference to Figure 10 In the terminal 41 according to the modified example, the positions of the first curvature centers C1 and the second curvature centers C2 can be distinguished based on a first reference line L1 that passes through the curvature center CO of the first neutral terminal 110 and the curvature center CO of the second neutral terminal 210. For example, the first terminal 100 and the second terminal 200 can be disposed such that the first curvature centers C1 are positioned at either side of the first reference line L1, and the second curvature centers C2 are disposed at the other side of the first reference line L1.

[0075] In addition, the positions of the first curvature centers C1 and the second curvature centers C2 can be distinguished based on a second reference line L2 that passes through the curvature center CO of the first neutral terminal 110 and the curvature center CO of the second neutral terminal 210 and is perpendicular to the first reference line L1. For example, the first terminal 100 and the second terminal 200 can be disposed such that the first curvature centers C1 are positioned at one side of the second reference line L2, and the second curvature centers C2 are positioned at the other side of the second reference line L2.

[0076] In this case, the positions of the curvature centers C1a, C1b, and C1c of the three first phase terminals 120A, 120B, and 120C are different. In addition, the positions of the curvature centers C2a, C2b, and C2c of the three second phase terminals 220A, 220B, and 220C are also different.

[0077] In addition, the first curvature centers C1 and the second curvature centers C2 can be disposed rotationally symmetric with respect to the curvature center CO of the first neutral terminal 110. For example, the first curvature centers C1 and the second curvature centers C2 can be point-symmetric with respect to the curvature center CO of the first neutral terminal 110, such that any one of the first curvature centers C1 and the second curvature centers C2 overlaps the other one when rotated by 180°.

[0078] Figure 11 is a view that illustrates the first phase terminal and the second phase terminal that are rotationally symmetric in the terminal shown in Figure 10

[0079] With reference to Figure 11 In the terminal 41 according to the modified example, the first phase terminals 120 and the second phase terminals 220 can be disposed rotationally symmetric with respect to the curvature center CO of the first neutral terminal 110. For example, the second end portion 4b of the first phase terminal 120 and the second end portion 4b of the second phase terminal 220 are rotationally symmetric.

[0080] As described above, the motor according to one example embodiment of the present application has been specifically described with reference to the accompanying drawings.

[0081] ​The above-described embodiments should be considered in a descriptive sense only and not for purposes of limitation. The scope of the present application should be considered in terms of the following claims, along with equivalents thereof. Additionally, the scope of the present application should be construed to cover all modifications and variations of the inventive features disclosed and claimed by the appended claims and their equivalents, including full use of the scope of equivalents.

Claims

1. A motor comprising: a shaft; a rotor coupled to the shaft; a stator disposed outside the rotor; and a busbar disposed on the stator, wherein the busbar includes terminals connected to coils of the stator, the terminals include first terminals and second terminals separated from each other in an electrical circuit and arranged to face each other, the first terminals include a plurality of first phase terminals, the second terminals include a plurality of second phase terminals, wherein radii of curvature of the plurality of first phase terminals are the same but positions of centers of curvature of the plurality of first phase terminals are different, and radii of curvature of the plurality of second phase terminals are the same but positions of centers of curvature of the plurality of second phase terminals are different, wherein the radius of curvature of the first phase terminal and the radius of curvature of the second phase terminal are the same, and the position of the center of curvature of the first phase terminal and the position of the center of curvature of the second phase terminal are different, wherein the first terminals further include a first neutral terminal, and the second terminals further include a second neutral terminal, wherein each of the first phase terminals and the second phase terminals has a multi-layer structure and includes: a body; and a protruding portion bent from the body in a radial direction with respect to a center of curvature of each of the first neutral terminal and the second neutral terminal, wherein the protruding portion includes: a first end portion extending from the body in a radial direction; a second end portion protruding from the first end portion and electrically connected to the coils of the stator; and a third end portion branched from the first end portion and electrically connected to a power cable, wherein a portion of the body and the second end portion are positioned on a first layer portion of each of the first phase terminal and the second phase terminal, and another portion of the body and the first end portion are disposed on a second layer portion of each of the first phase terminal and the second phase terminal; and wherein the first end portion of each of the first phase terminals is disposed to straddle an upper side of the portion of the body of other first phase terminals, and the first end portion of each of the second phase terminals is disposed to straddle an upper side of the portion of the body of other second phase terminals. The position of the center of curvature of the first neutral terminal and the position of the center of curvature of the second neutral terminal are the same.

2. The motor of claim 1, wherein, The radius of curvature of the first neutral terminal and the radius of curvature of the second neutral terminal are the same.

3. The motor of claim 1, wherein, The plurality of first phase terminals have the same shape, and the plurality of second phase terminals have the same shape.

4. The motor of claim 1, wherein, The shape of the first phase terminal and the shape of the second phase terminal are the same.

5. The motor of claim 1, wherein, When a virtual line passing through a center of curvature of the first neutral terminal is referred to as a first reference line, and when a virtual line perpendicular to the first reference line and passing through the center of curvature of the first neutral terminal is referred to as a second reference line:

6. The motor of claim 1, wherein, a first center of curvature is disposed at either side of the first reference line; a second center of curvature is disposed at the other side of the first reference line; ​ the first center of curvature is disposed at either side of the second reference line; and the second center of curvature is disposed at the other side of the second reference line.

7. The motor of claim 1, wherein, when viewed in the axial direction: any one of the plurality of protrusions disposed on any one of the plurality of first phase terminals is disposed between one side end portion of the first neutral terminal and one side end portion of the second neutral terminal; and any one of the plurality of protrusions disposed on any one of the plurality of second phase terminals is disposed between the other side end portion of the first neutral terminal and the other side end portion of the second neutral terminal.

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