motor

Abstract

Disclosed is a motor including a housing, a stator arranged in the housing, a rotor arranged in the stator, and a first busbar arranged below the stator, wherein the first busbar includes a plurality of neutral terminals connected to coils of the stator, separated by circuits, and arranged rotationally symmetric with respect to each other based on a center of the stator. Thus, terminals having exactly the same shape are combined to achieve terminals connected to four circuits separately from each other, and thus, an advantageous effect of ensuring accurate positions of the terminals as well as simplifying an assembly process is provided during a process of molding the busbar.

Description

Technical Field

[0001] This invention relates to motors. Background Technology

[0002] Electric power steering (EPS) is a device that ensures vehicle steering stability and quickly provides restoring force, enabling the driver to drive the vehicle safely. Based on driving conditions detected by vehicle speed sensors, torque angle sensors, torque sensors, etc., the EPS system uses an electronic control unit (ECU) to drive a motor to control the vehicle's steering shaft.

[0003] The motor includes a rotor and a stator. A coil is wound around the stator. The connecting ends of the coil wound around the stator can be connected to a busbar. The busbar includes a body and terminals. The terminals connect to the connecting ends of the coil. Alternatively, the terminals can be connected to an external power source via cables.

[0004] The terminals can be configured as a combination of phase terminals connected to the U-phase, V-phase, and W-phase power supply and a neutral terminal connecting the phase terminals. In this case, to ensure motor safety, multiple terminals of this combination can be provided, and the circuit of these multiple terminals can be divided. When an abnormality occurs at the circuit connected to any one terminal or at the component connected to that circuit, motor drive can be ensured through another terminal. The multiple terminals are spatially divided within the busbar body (as separate circuits).

[0005] However, since the connecting ends of the terminals are arranged at equal intervals, terminals of various shapes may be required. When terminals of various shapes are provided, the number of molds increases, resulting in increased costs, greater material waste, and a more complex manufacturing process.

[0006] In addition, the following problems exist in the injection molding process of busbars: the positions of multiple terminals are prone to errors; and it is difficult to visually check whether the positions of the neutral terminal or phase terminal are correct.

[0007] Therefore, various studies have been conducted to simplify the assembly process by unifying the shapes of multiple terminals and accurately ensuring the positional errors of the terminals, but these studies are still insufficient, and there is therefore an urgent need to develop such terminals. Summary of the Invention

[0008] Technical issues

[0009] The present invention aims to provide a motor in which the shape of the terminals is uniform, the accurate position of the terminals is ensured during the molding of the busbar, and the assembly process is simplified.

[0010] The present invention aims to provide a motor that improves the design freedom and space utilization by simplifying the structure of the busbar to reduce its size.

[0011] The objectives to be achieved by the present invention are not limited to those described above, and other objectives not described above will be clearly understood by those skilled in the art from the following description.

[0012] Technical solutions

[0013] One aspect of the present invention provides a motor comprising: a housing; a stator disposed within the housing; a rotor disposed within the stator; and a first busbar disposed below the stator, wherein the first busbar includes a plurality of neutral terminals connected to and circuit-divided by coils of the stator, and the plurality of neutral terminals are arranged to be rotationally symmetrical about the center of the stator.

[0014] The first busbar may include a first neutral terminal, a second neutral terminal, a third neutral terminal, and a fourth neutral terminal.

[0015] The first neutral terminal, the second neutral terminal, the third neutral terminal, and the fourth neutral terminal can be arranged at 90° intervals to be rotationally symmetrical about the center of the stator.

[0016] The first neutral terminal, the second neutral terminal, the third neutral terminal, and the fourth neutral terminal can be formed with the same structure.

[0017] Each neutral terminal may include a neutral terminal body and a protruding neutral terminal portion extending from the neutral terminal body in the radial direction of the stator.

[0018] The first busbar may include a first body formed to surround a plurality of neutral terminals.

[0019] The first busbar can be supported by the inner surface of the housing.

[0020] The first body may include a first inner surface and a first outer surface, and the first outer surface may be supported to press against the inner surface of the housing.

[0021] The protruding neutral terminal portion can protrude toward the first inner surface.

[0022] The motor may include a second busbar disposed on the stator, wherein the second busbar may include multiple terminal modules connected to the coils of the stator and dividing the circuit, and each terminal module may include multiple phase terminals.

[0023] The second busbar may include a first terminal module connected to a first neutral terminal, a second terminal module connected to a second neutral terminal, a third terminal module connected to a third neutral terminal, and a fourth terminal module connected to a fourth neutral terminal.

[0024] The first terminal module, the second terminal module, the third terminal module, and the fourth terminal module can be configured to be rotationally symmetrical about the center of the stator.

[0025] The first terminal module, the second terminal module, the third terminal module, and the fourth terminal module can be arranged at 90° intervals to be rotationally symmetrical about the center of the stator.

[0026] The first terminal module may include 1-1 phase terminals, 1-2 phase terminals, and 1-3 phase terminals spaced apart at 30° intervals around the center of the stator; the second terminal module may include 2-1 phase terminals, 2-2 phase terminals, and 2-3 phase terminals spaced apart at 30° intervals around the center of the stator; the third terminal module may include 3-1 phase terminals, 3-2 phase terminals, and 3-3 phase terminals spaced apart at 30° intervals around the center of the stator; and the fourth terminal module may include 4-1 phase terminals, 4-2 phase terminals, and 4-3 phase terminals spaced apart at 30° intervals around the center of the stator.

[0027] Phase 1 terminal, phase 1 terminal, phase 1 terminal, phase 3 terminal, phase 2 terminal, phase 2 terminal, phase 2 terminal, phase 2 terminal, phase 3 terminal, phase 3 terminal, phase 3 terminal, phase 3 terminal, phase 4 terminal, phase 4 terminal, and phase 4 terminal can be formed into the same structure.

[0028] Each phase terminal may include a phase terminal body and a protruding phase terminal portion extending from the phase terminal body in the radial direction of the stator.

[0029] The second busbar may include a second molding element formed to surround a plurality of phase terminals.

[0030] Another aspect of the present invention provides a motor comprising: a shaft; a rotor connected to the shaft; a stator disposed outside the rotor; and a busbar disposed on the stator, wherein the busbar comprises: a body including a first inner surface and a first outer surface; and a plurality of terminal modules connected to coils of the stator and performing circuit division, and the terminal modules including phase terminals exposed from the first outer surface and neutral terminals exposed from the first inner surface.

[0031] The busbar may include a first terminal module, a second terminal module, a third terminal module, and a fourth terminal module.

[0032] Multiple terminal modules can be configured to be rotationally symmetrical about the center of the stator.

[0033] The first terminal module, the second terminal module, the third terminal module, and the fourth terminal module can be arranged at 90° intervals to be rotationally symmetrical about the center of the stator.

[0034] The first terminal module may include a 1-1 phase terminal, a 1-2 phase terminal, and a 1-3 phase terminal exposed from the first outer surface, and a first neutral terminal exposed from the first inner surface; the second terminal module may include a 2-1 phase terminal, a 2-2 phase terminal, and a 2-3 phase terminal exposed from the first outer surface, and a second neutral terminal exposed from the first inner surface; the third terminal module may include a 3-1 phase terminal, a 3-2 phase terminal, and a 3-3 phase terminal exposed from the first outer surface, and a third neutral terminal exposed from the first inner surface; the fourth terminal module may include a 4-1 phase terminal, a 4-2 phase terminal, and a 4-3 phase terminal exposed from the first outer surface, and a fourth neutral terminal exposed from the first inner surface.

[0035] Phase 1, Phase 2, Phase 3, and Phase 4 can be formed with identical structures; Phase 1, Phase 2, Phase 3, and Phase 4 can be formed with identical structures; Phase 1, Phase 2, Phase 3, Phase 3, and Phase 4 can be formed with identical structures; and the first neutral terminal, the second neutral terminal, the third neutral terminal, and the fourth neutral terminal can be formed with identical structures.

[0036] Each phase terminal may include: a phase terminal body disposed in the body; and a protruding phase terminal portion extending from the phase terminal body and protruding from a first outer surface in a radial direction of the stator. Similarly, each neutral terminal may include: a neutral terminal body disposed in the body; and a protruding neutral terminal portion extending from the neutral terminal body and protruding from a first inner surface in a radial direction of the stator.

[0037] The phase terminals and neutral terminals can be configured to form different layers in the axial direction of the shaft.

[0038] The phase terminal body can be configured to form a first layer in the body; and the neutral terminal can be configured to form a second layer in the body, the second layer being disposed above or below the phase terminal.

[0039] The phase terminals and neutral terminals can be configured to form the same layer in the axial direction of the shaft.

[0040] The phase terminal body can be configured to form a first layer in the body, and the neutral terminal can be configured to form the first layer in the body.

[0041] Beneficial effects

[0042] According to the implementation method, since terminals with the same shape are combined to achieve connection with four dividing circuits, it provides the beneficial effects of ensuring accurate terminal positioning during the molding of the busbar and simplifying the assembly process.

[0043] According to the implementation method, the advantages of reducing the size of the busbar and increasing design freedom and space utilization can be achieved by simplifying the structure of the busbar.

[0044] According to the implementation method, since terminals with the same shape are combined to achieve connection with four dividing circuits, it provides the beneficial effects of ensuring accurate terminal positioning during the molding of the busbar and simplifying the assembly process.

[0045] According to the implementation method, although multiple terminals have the same shape, the protruding portions of the terminals are easily arranged at equal intervals, thus providing the beneficial effect of improving insulation stability.

[0046] The various useful advantages and effects of the implementation methods are not limited to those described above, and can be more easily understood when describing specific implementation methods. Attached Figure Description

[0047] Figure 1 The illustration shows a cross-sectional view of a motor according to the first embodiment.

[0048] Figure 2 It is a plan view used to describe the layout of the first busbar and the second busbar in the motor according to the first embodiment.

[0049] Figure 3 This is a plan view used to describe the second busbar in the motor according to the first embodiment.

[0050] Figure 4 This is a plan view used to describe the phase terminals of the second busbar in the motor according to the first embodiment.

[0051] Figure 5 It is a plan view used to describe the first busbar in the motor according to the first embodiment.

[0052] Figure 6 This is a view used to describe the neutral terminal of the first busbar in the motor according to the first embodiment.

[0053] Figure 7 This is a view used to describe the winding structure of the coil in the motor according to the first embodiment.

[0054] Figure 8This is a view used to describe the control circuit in the motor according to the first embodiment.

[0055] Figure 9 This is a view used to describe the connection structure between the second busbar and the power supply terminal in the motor according to the first embodiment.

[0056] Figure 10 This is a view used to describe the connection structure of the stator coils and power supply terminals in another example of a motor according to the first embodiment.

[0057] Figure 11 This is a view used to describe the support structure of the first busbar in a motor according to the first embodiment.

[0058] Figure 12 The illustration shows a cross-sectional view of a motor according to the second embodiment.

[0059] Figure 13 This is a plan view used to describe the busbar in the motor of the second embodiment.

[0060] Figure 14 The diagram shows a cross-sectional view of the busbar in the motor according to the second embodiment.

[0061] Figure 15 This is a plan view illustrating a busbar in a motor according to a second embodiment, wherein phase terminals are provided on the busbar.

[0062] Figure 16 This is a plan view used to describe the phase terminals of the busbar in the motor according to the second embodiment.

[0063] Figure 17 This is a plan view illustrating a busbar in a motor according to a second embodiment, wherein a neutral terminal is provided.

[0064] Figure 18 This is a view used to describe the neutral terminal of the busbar in the motor according to the second embodiment.

[0065] Figure 19 This is a view used to describe the winding structure of the coil in the motor according to the second embodiment.

[0066] Figure 20 This is a view used to describe the control circuit in the motor according to the second embodiment.

[0067] Figure 21 This is a cross-sectional view illustrating a modified example of the busbar in a motor according to the second embodiment. Detailed Implementation

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

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

[0070] Furthermore, unless the context explicitly and specifically defines otherwise, all terms used herein (including technical and scientific terms) are to be interpreted as having the meaning conventionally understood by those skilled in the art, and the meaning of commonly used terms, such as those defined in common dictionaries, will be interpreted in light of the contextual meaning of the relevant art.

[0071] Furthermore, the terminology used in the embodiments of the present invention is for descriptive purposes only and does not limit the invention.

[0072] In this specification, unless the context clearly indicates otherwise, the singular form includes its plural form, and in the case of describing “at least one of A, B and C (or one or more of them)”, this may include at least one combination of all possible combinations of A, B and C.

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

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

[0075] Additionally, it should be understood that when an element is referred to as being “connected” or “linked” to another element, such a description can include the following two cases: the element is directly connected or linked to the other element; and the element is connected or linked to the other element by means of another element disposed between the element and the other element.

[0076] Additionally, when any element is described as being formed or disposed "above" or "below" another element, such a description includes two cases: the two elements are formed or disposed in direct contact with each other; and one or more other elements are inserted between the two elements. Furthermore, when an element is described as being formed "above or below" another element, such a description can include cases where one element is formed on the upper or lower side relative to the other element.

[0077] In the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings, identical or corresponding parts will be indicated by the same reference numerals in all the drawings, and redundant descriptions will be omitted.

[0078] First Implementation Method

[0079] Reference Figures 1 to 9 The motor according to the first embodiment includes: a housing 50; a stator 30 disposed in the housing 50; a rotor 20 disposed in the stator 30; a first busbar 80 disposed below the stator 30; and a second busbar 40 disposed on the stator 30.

[0080] The housing 50 is configured to have a receiving space within the housing 50, and the stator 30 and the rotor 20 are disposed within the housing 50.

[0081] Shaft 10 can be connected to rotor 20. When electromagnetic interaction occurs between rotor 20 and stator 30 due to the supply current, rotor 20 rotates, and shaft 10 rotates together with rotor 20. As an example, shaft 10 can be connected to the steering shaft of a vehicle and can transmit power to the steering shaft of the vehicle.

[0082] The rotor 20 is rotatably disposed in the stator 30 and rotates by electrical interaction with the stator 30.

[0083] The rotor 20 may include a rotor core and a magnet. As an example, the rotor core may be formed in the form of a stack of multiple thin annular steel plates or in the form of a single container.

[0084] A hole (not shown) to be connected to shaft 10 can be formed in the central portion of the rotor core. A protrusion (not shown) for guiding a magnet (not shown) can protrude toward the outer peripheral surface of the rotor core. The magnet can be attached to the outer peripheral surface of the rotor core. Multiple magnets can be arranged at predetermined intervals along the circumference of the rotor core.

[0085] Additionally, the rotor 20 may include a can-shaped member (not shown) that surrounds the magnet to secure the magnet in place and prevent it from being exposed.

[0086] Coil 31 can be wound around stator 30 to induce electrical interaction with rotor 20.

[0087] The specific structure for winding coil 31 around stator 30 will be described below. Stator 30 may include a stator core (not shown) having a plurality of teeth (not shown). The stator core may include an annular magnetic yoke (not shown) and a plurality of teeth protruding from the magnetic yoke in a central direction and around which coil 31 is wound. In this case, the central direction may be a radial direction. These teeth may be formed at predetermined intervals in the circumferential direction along the magnetic yoke. The stator core may also be formed by stacking a plurality of thin steel plates. Alternatively, the stator core may be formed by connecting or linking a plurality of divided cores.

[0088] Additionally, a sensing magnet 60 is formed within the housing, which is connected to the shaft 10 and operates in conjunction with the rotor 20. In this case, the sensing magnet 60 is a device for detecting the position of the rotor 20.

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

[0090] The second busbar 40 may include: a plurality of terminal modules 110, 120, 130, and 140, which are connected to the coils 31 of the stator 30 and are circuit-divided among themselves; and a second body 42, which may be disposed on the stator 30.

[0091] As an example, the second busbar 40 can be configured to include an annular second body 42 and a plurality of terminal modules disposed within the second body 42, with the power terminal PT connected to the upper portion of the second busbar 40 (see [link]). Figure 9 Power is supplied through these power terminals PT.

[0092] The second body 42 may be a molded portion formed by injection molding. The second body 42 includes a hole (not shown) in its central portion. A plurality of terminal modules 110, 120, 130, and 140 are disposed in the second body 42, and portions of the end portions of the terminal modules 110, 120, 130, and 140 are partially exposed to the outside of the second body 42. Furthermore, the second body 42 may have a multi-layered or single-layered structure in the axial direction. In this case, the axial direction may be the longitudinal direction of the shaft 10.

[0093] The second busbar 40 can be configured to form a plurality of terminal modules 110, 120, 130, and 140, which are divided by circuitry. The second busbar 40 may include a plurality of phase terminals connected to the U-phase, V-phase, and W-phase power supplies.

[0094] For reference, in this embodiment, the multiple terminal modules 110, 120, 130, 140 divided by the circuit can be defined as multiple terminal modules 110, 120, 130, 140 connected to the coil 31 of the stator 30 but divided and forming independent motor control circuits (see...). Figure 7 and Figure 8 ).

[0095] According to an exemplary embodiment, the second busbar 40 may include a first terminal module 110, a second terminal module 120, a third terminal module 130, and a fourth terminal module 140, which are circuitally divided (see [link]). Figure 2 and Figure 8 ).

[0096] For reference, although an example of a second busbar 40 comprising four circuit-divided terminal modules has been described in this embodiment, according to another embodiment of the invention, the terminal unit may also comprise three or fewer, or five or more circuit-divided terminal modules.

[0097] The first terminal module 110, the second terminal module 120, the third terminal module 130, and the fourth terminal module 140 are configured to be rotationally symmetrical about the center of the stator 30 (or the center of the second busbar).

[0098] For reference, the first terminal module 110, the second terminal module 120, the third terminal module 130, and the fourth terminal module 140 can be configured to form the same layer or different layers in the axial direction of the shaft 10. An example of the first terminal module 110, the second terminal module 120, the third terminal module 130, and the fourth terminal module 140 being formed on a single layer will be described below.

[0099] Preferably, the first terminal module 110, the second terminal module 120, the third terminal module 130 and the fourth terminal module 140 are arranged to be spaced apart at 90° intervals and to be rotationally symmetrical about the center C1 of the stator 30.

[0100] This is to simplify the manufacturing process of terminal modules 110, 120, 130, and 140 and reduce manufacturing costs.

[0101] In other words, in order to manufacture multiple terminal modules 110, 120, 130, and 140 divided by circuitry, various terminals of different shapes should be provided for each position of the terminal module. In this case, since the number of molds used to manufacture the terminals inevitably increases to manufacture various types of terminals, there are problems of complex manufacturing process and increased manufacturing cost.

[0102] However, in this embodiment, since multiple terminal modules 110, 120, 130, and 140 divided by circuitry can be manufactured using only one type of terminal module, the following advantages can be obtained: minimizing the number of molds used to manufacture terminal modules 110, 120, 130, and 140, simplifying the manufacturing process, and reducing manufacturing costs.

[0103] More specifically, the first terminal module 110 may include three-phase terminals, the second terminal module 120 may include three-phase terminals, the third terminal module 130 may include three-phase terminals, and the fourth terminal module 140 may include three-phase terminals.

[0104] As an example, the first terminal module 110 may include a 1-1 phase terminal 112 (e.g., U1 phase), a 1-2 phase terminal 114 (e.g., V1 phase), and a 1-3 phase terminal 116 (e.g., W1 phase) spaced apart at 30° intervals around the center C1 of the stator 30.

[0105] The second terminal module 120 may include 2-1 phase terminals 122 (e.g., U2 phase), 2-2 phase terminals 124 (e.g., V2 phase), and 2-3 phase terminals 126 (e.g., W2 phase) that are spaced apart at 30° intervals around the center C1 of the stator 30.

[0106] The third terminal module 130 may include a 3-1 phase terminal 132 (e.g., U3 phase), a 3-2 phase terminal 134 (e.g., V3 phase), and a 3-3 phase terminal 136 (e.g., W3 phase) spaced apart at 30° intervals around the center C1 of the stator 30.

[0107] The fourth terminal module 140 may include a 4-1 phase terminal 142 (e.g., U4 phase), a 4-2 phase terminal 144 (e.g., V4 phase), and a 4-3 phase terminal 146 (e.g., W4 phase) spaced apart at 30° intervals around the center C1 of the stator 30.

[0108] Reference Figure 2 Phase 1-1 terminal 112 surrounds the center C1 of stator 30 along the 12 o'clock direction (based on...) Figure 2 The 1-2 phase terminal 114 is configured to be spaced 30° from the 1-1 phase terminal 112 around the center C1 of the stator 30, and the 1-3 phase terminal 116 is configured to be spaced 30° from the 1-2 phase terminal 114 around the center C1 of the stator 30. As an example, the 1-1 phase terminal 112, the 1-2 phase terminal 114, and the 1-3 phase terminal 116 may be located in the first quadrant of a quadrant divided based on the vertical axes (x-axis and y-axis) passing through the center C1 of the stator 30.

[0109] Phase 2-1 terminal 122 surrounds the center C1 of stator 30 along the 3 o'clock direction (based on...) Figure 2 The 2-2 phase terminal 124 is configured to be spaced 30° from the 2-1 phase terminal 122 around the center C1 of the stator 30, and the 2-3 phase terminal 126 is configured to be spaced 30° from the 2-2 phase terminal 124 around the center C1 of the stator 30. As an example, the 2-1 phase terminal 122, the 2-2 phase terminal 124, and the 2-3 phase terminal 126 may be located in the fourth quadrant of a quadrant divided based on the vertical axes (x-axis and y-axis) passing through the center C1 of the stator 30.

[0110] Phase 3-1 terminal 132 surrounds the center C1 of stator 30 along the 6 o'clock direction (based on...) Figure 2 The 3-2 phase terminal 134 is configured to be spaced 30° from the 3-1 phase terminal 132 around the center C1 of the stator 30, and the 3-3 phase terminal 136 is configured to be spaced 30° from the 3-2 phase terminal 134 around the center C1 of the stator 30. As an example, the 3-1 phase terminal 132, the 3-2 phase terminal 134, and the 3-3 phase terminal 136 may be located in the third quadrant of a quadrant divided based on the vertical axes (x-axis and y-axis) passing through the center C1 of the stator 30.

[0111] 4-1 phase terminal 142 is based on the center C1 of stator 30 along the 9 o'clock direction (based on) Figure 2 The 4-2 phase terminal 144 is configured to be spaced 30° from the 4-1 phase terminal 142 around the center C1 of the stator 30, and the 4-3 phase terminal 146 is configured to be spaced 30° from the 4-2 phase terminal 144 around the center C1 of the stator 30. As an example, the 4-1 phase terminal 142, the 4-2 phase terminal 144, and the 4-3 phase terminal 146 may be located in the second quadrant of a quadrant divided based on the vertical axes (x-axis and y-axis) passing through the center C1 of the stator 30.

[0112] More specifically, the 1-1 phase terminal 112 is arranged around the center C1 of the stator 30 in the 12 o'clock direction, and the 1-2 phase terminal 114, 1-3 phase terminal 116, 2-1 phase terminal 122, 2-2 phase terminal 124, 2-3 phase terminal 126, 3-1 phase terminal 132, 3-2 phase terminal 134, 3-3 phase terminal 136, 4-1 phase terminal 142, 4-2 phase terminal 144 and 4-3 phase terminal 146 are arranged sequentially and spaced apart at 30° intervals in a clockwise direction.

[0113] Preferably, the 1-1 phase terminal 112, 1-2 phase terminal 114, 1-3 phase terminal 116, 2-1 phase terminal 122, 2-2 phase terminal 124, 2-3 phase terminal 126, 3-1 phase terminal 132, 3-2 phase terminal 134, 3-3 phase terminal 136, 4-1 phase terminal 142, 4-2 phase terminal 144, and 4-3 phase terminal 146 are formed with identical structures (identical shapes). Therefore, since multiple phase terminals constituting four independent terminal modules that are different from each other can be manufactured using a single mold, there are advantages such as simple manufacturing process and reduced manufacturing cost.

[0114] Reference Figure 4 Each of the plurality of phase terminals (phase 1-1, phase 1-2, phase 1-3, phase 2-1, phase 2-2, phase 2-3, phase 3-1, phase 3-2, phase 3-3, phase 4-1, phase 4-2, and phase 4-3) may include a phase terminal body 101 and a protruding phase terminal portion 102 extending from the phase terminal body 101 in the radial direction of the stator 30. Hereinafter, the phase terminal body 101 and the protruding phase terminal portion 102 will be described based on the phase 1-1 phase terminal 112.

[0115] The phase terminal body 101 can be formed as a straight strip-type member (or a strip-type member with an arc shape having a predetermined curvature). The phase terminal body 101 and the protruding phase terminal portion 102 can be divided and described only according to their shape and functional characteristics, and can be an integrally connected member.

[0116] As an example, the phase terminal body 101 of phase terminal 112 can be formed as a straight strip type member. For example... Figure 2 and Figure 3 As shown in the figure, the inner end portion of the phase terminal body 101 can be configured to protrude radially toward the inner peripheral surface of the second body 42.

[0117] The protruding phase terminal portion 102 extends from the phase terminal body 101 in the radial direction of the stator 30 and protrudes outward from the first body 82. The end portion of the protruding phase terminal portion 102 is formed to be curved like a hook.

[0118] The protruding phase terminal portion 102 is electrically connected to the coil 31 of the stator 30. As an example, the protruding phase terminal portion 102 may be fused to the coil 31 of the stator 30.

[0119] The phase terminal body 101 and the protruding phase terminal portion 102 can be formed as a single-layer structure or a double-layer structure (multi-layer structure), and the present invention is not constrained or limited by the connection structure between the phase terminal body 101 and the protruding phase terminal portion 102.

[0120] The first busbar 80 includes: a plurality of neutral terminals 118, 128, 138, and 148, which are disposed below the stator 30, connected to the coil 31 of the stator 30, and circuit-divided among themselves; and a first body 82.

[0121] As an example, the first busbar 80 may be configured to include an annular first body 82 and a plurality of neutral terminals 118, 128, 138, 148 disposed in the first body 82.

[0122] The first body 82 may be a molded portion formed by injection molding. The first body 82 may include a hole (not shown) in its central portion. A neutral terminal is disposed in the first body 82, and a portion of the end portion of the neutral terminal is configured to be exposed outward from the first body 82. Furthermore, the first body 82 may have a multi-layer structure or a single-layer structure.

[0123] This is to simplify the structure and manufacturing process of the busbar (first busbar or second busbar) and to use the free space below the stator to arrange the neutral terminals 118, 128, 138, and 148.

[0124] In other words, in this embodiment, since the phase terminals and neutral terminals used to form the multiple terminal modules divided by the circuit are structurally divided such that the neutral terminal is included in the first busbar 80 and the phase terminals are included in the second busbar 40, the advantageous effect of simplifying the structure and manufacturing process of the first busbar 80 and the second busbar 40 can be obtained.

[0125] Furthermore, since the first busbar 80, including the neutral terminal, is disposed in the free space below the stator (between the lower part of the stator and the housing), the space utilization and design freedom of the upper region of the stator can be improved, and the first busbar 80 and the second busbar 40 used to constitute multiple motor control circuits can be more easily installed in the motor. Therefore, the following advantages can be achieved: minimizing the increase in motor size due to the installation of phase terminals and neutral terminals for constituting multiple motor control circuits, and contributing to motor miniaturization.

[0126] Reference Figure 5 Multiple neutral terminals 118, 128, 138, and 148 are arranged to be rotationally symmetrical about the center C of the stator 30.

[0127] According to an exemplary embodiment of the present invention, the first busbar 80 may include a first neutral terminal 118, a second neutral terminal 128, a third neutral terminal 138 and a fourth neutral terminal 148 which are divided (physically and electrically) by circuitry.

[0128] More specifically, the first neutral terminal 118 is connected to the first terminal module 110, the second neutral terminal 128 is connected to the second terminal module 120, the third neutral terminal 138 is connected to the third terminal module 130, and the fourth neutral terminal 148 is connected to the fourth terminal module 140.

[0129] Preferably, the first neutral terminal 118, the second neutral terminal 128, the third neutral terminal 138 and the fourth neutral terminal 148 are arranged at 90° intervals to be rotationally symmetrical about the center C1 of the stator 30.

[0130] As described above, since multiple terminal modules that can be circuit-divided from each other can be formed by using a common type of neutral terminal, the following advantages can be obtained: minimizing the number of molds used to manufacture multiple terminal modules, simplifying the manufacturing process, and reducing manufacturing costs.

[0131] More specifically, the first neutral terminal 118 can electrically connect (e.g., phase 1-1 terminal 112 of phase U1), (e.g., phase 1-2 terminal 114 of phase V1), and (e.g., phase 1-3 terminal 116 of phase W1). As an example, the first neutral terminal 118 can be located in the first quadrant of a quadrant divided based on the vertical axes (x-axis and y-axis) passing through the center C1 of the stator 30.

[0132] The second neutral terminal 128 can electrically connect (e.g., phase 2-1 terminal 122 of phase U2), (e.g., phase 2-2 terminal 124 of phase V2), and (e.g., phase 2-3 terminal 126 of phase W2). As an example, the second neutral terminal 128 can be located in the fourth quadrant of a quadrant divided based on the vertical axes (x-axis and y-axis) passing through the center C1 of the stator 30.

[0133] The third neutral terminal 138 can electrically connect (e.g., the 3-1 phase terminal 132 of U3 phase), (e.g., the 3-2 phase terminal 134 of V3 phase), and (e.g., the 3-3 phase terminal 136 of W3 phase). As an example, the third neutral terminal 138 can be located in the third quadrant of a quadrant divided based on the vertical axes (x-axis and y-axis) passing through the center C1 of the stator 30.

[0134] The fourth neutral terminal 148 can electrically connect (e.g., the 4-1 phase terminal 142 of U4 phase), (e.g., the 4-2 phase terminal 144 of V4 phase), and (e.g., the 4-3 phase terminal 146 of W4 phase). As an example, the fourth neutral terminal 148 can be located in the second quadrant of a quadrant divided based on the vertical axes (x-axis and y-axis) passing through the center C1 of the stator 30.

[0135] Preferably, the first neutral terminal 118, the second neutral terminal 128, the third neutral terminal 138, and the fourth neutral terminal 148 are formed with identical structures (identical shapes). Therefore, since multiple neutral terminals constituting four independent terminal modules that are different from each other can be manufactured using a single mold, there are advantages such as simple manufacturing process and reduced manufacturing cost.

[0136] Reference Figure 6 Each of the first neutral terminal 118, the second neutral terminal 128, the third neutral terminal 138, and the fourth neutral terminal 148 includes a neutral terminal body 103 and a protruding neutral terminal portion 104 extending from the neutral terminal body 103 in the radial direction of the stator 30.

[0137] The neutral terminal body 103 can be formed as a strip-shaped member with a curved surface. The neutral terminal body 103 and the protruding neutral terminal 104 can be divided and described solely based on their shape and functional characteristics, and can be an integrally connected member.

[0138] As an example, the neutral terminal body 103 of each of the first neutral terminal 118, the second neutral terminal 128, the third neutral terminal 138, and the fourth neutral terminal 148 can be formed as a strip-shaped member with an arcuate shape having a predetermined curvature. Alternatively, the neutral terminal body 103 can be disposed within the first body 82. Furthermore, referring to… Figure 2 The neutral terminal body 103 can be disposed radially outward from the inner end portion of the phase terminal body 101. Therefore, some neutral terminal bodies 103 can be configured to overlap with the phase terminal body 101 in the axial direction. However, not all phase terminal bodies 101 of these phase terminals are configured to overlap with the neutral terminal body 103 in the axial direction. For example, some phase terminals 112, 122, 132, and 142 may not overlap with the neutral terminal body 103 in the axial direction.

[0139] The protruding neutral terminal portion 104 extends from the neutral terminal body 103 in the radial direction of the stator 30 and protrudes outward from the first body 82. Three protruding neutral terminal portions 104 are provided on the neutral terminal body 103, and the end portions of the protruding neutral terminal portions 104 are formed into a hook-like curved shape.

[0140] The protruding neutral terminal portion 104 is electrically connected to the coil 31 of the stator 30, which is connected to the U-phase, V-phase, and W-phase power supplies. As an example, the protruding neutral terminal portion 104 may be fused to the coil 31 of the stator 30.

[0141] The neutral terminal body 103 and the protruding neutral terminal portion 104 can be formed as a single-layer structure or a double-layer structure (multi-layer structure), but the present invention is not constrained or limited by the connection structure between the neutral terminal body 103 and the protruding neutral terminal portion 104.

[0142] Meanwhile, although an example of a motor including both a first busbar 80 and a second busbar 40 has been described in the embodiments of the invention described and illustrated above, in which power is applied to the coil via the second busbar 40 connected to the power supply terminal PT, according to another embodiment of the invention, the power supply terminal may also be directly connected to the coil without using a separate second busbar.

[0143] Reference Figure 10 The motor includes: a housing 50; a stator 30 disposed within the housing 50; a rotor 20 disposed within the stator 30; and only one first busbar 80 disposed below the stator 30, and the motor does not include a second busbar 40 (see [link to motor description]). Figure 9 ).

[0144] The power supply terminals PT can be directly connected to the coils of the stator 30, through which U-phase, V-phase, and W-phase power is applied, and the first busbar 80 includes multiple neutral terminals 118, 128, 138, 148 (see [link to busbar]) connected to the coils 31 of the stator 30 and used for circuit division. Figure 5 ).

[0145] As described above, in this embodiment, since it is not necessary to provide phase terminals (of the second busbar) used to form multiple terminal modules that divide each other into circuits, the advantageous effect of simplifying the structure and manufacturing process of the first busbar 80 can be obtained.

[0146] Furthermore, since the first busbar 80, including the neutral terminal, is located below the stator 30, the space utilization and design freedom of the upper part of the stator 30 can be improved, and the first busbar 80 used to form multiple motor control circuits can be more easily installed in the motor. Therefore, the following advantages can be obtained: minimizing the increase in size of the motor due to the installation of the neutral terminal for forming multiple motor control circuits, and contributing to the miniaturization of the motor.

[0147] Additionally, refer to Figure 11 According to an exemplary embodiment of the present invention, the first busbar 80 is supported by the inner surface of the housing 50.

[0148] As described above, since the first busbar 80 is supported by the inner surface of the housing 50, the following advantages can be achieved: suppressing the vibration of the first busbar 80 when driving the motor, and minimizing vibration and noise.

[0149] The first busbar 80 can be supported by the inner surface of the housing in one of a variety of ways, depending on the required conditions and design specifications.

[0150] As an example, the first body 82 includes a first inner surface 82a and a first outer surface 82b, and the first outer surface 82b is supported to press against the inner surface of the housing 50.

[0151] Preferably, the protruding neutral terminal portion 104 protrudes toward the first inner surface 82a. As described above, since the protruding neutral terminal portion 104 protrudes toward the first inner surface 82a of the first body 82, the following advantageous effect can be obtained: the outer surface 82b of the first body 82 is pressed against the inner surface of the housing 50 without interfering with the first protruding neutral terminal portion 104.

[0152] Second Implementation Method

[0153] Reference Figures 12 to 20 The motor according to the second embodiment includes: a shaft 10; a rotor 20 connected to the shaft 10; a stator 30 disposed outside the rotor 20; terminals connected to coils 31 of the stator 30; and a busbar 40a disposed on the stator 30. In this case, the busbar 40a of the motor according to the second embodiment can be disposed in the motor, replacing the first busbar 80 and the second busbar 40 of the motor according to the first embodiment.

[0154] Shaft 10 can be connected to rotor 20. When electromagnetic interaction occurs between rotor 20 and stator 30 due to the supply current, rotor 20 rotates, and shaft 10 rotates together with rotor 20. As an example, shaft 10 can be connected to the steering shaft of a vehicle and can transmit power to the steering shaft of the vehicle.

[0155] The rotor 20 rotates through electrical interaction with the stator 30.

[0156] The rotor 20 may include a rotor core and a magnet. As an example, the rotor core may be formed in the form of a stack of multiple thin annular steel plates or in the form of a single container.

[0157] A hole (not shown) to be connected to shaft 10 can be formed in the central portion of the rotor core. A protrusion (not shown) guiding a magnet (not shown) can protrude toward the outer peripheral surface of the rotor core. The magnet can be attached to the outer peripheral surface of the rotor core. Multiple magnets can be arranged at predetermined intervals along the circumference of the rotor core.

[0158] Additionally, the rotor 20 may include a can-shaped member (not shown) that surrounds the magnet to secure the magnet in place and prevent it from being exposed.

[0159] The stator 30 may include a coil 31 wound around the stator 30 to induce electrical interaction with the rotor 20.

[0160] The specific structure for winding the coil 31 around the stator 30 will be described below. The stator 30 may include a stator core (not shown) having a plurality of teeth (not shown). The stator core may include an annular yoke (not shown) and teeth that project from the yoke in a central direction and around which the coil 31 is wound. These teeth may be formed at predetermined intervals along the circumferential direction of the yoke. The stator core may also be formed by stacking a plurality of thin steel plates. Alternatively, the stator core may be formed by connecting or linking a plurality of divided cores.

[0161] Additionally, the motor includes a housing 50, a rotor 20, and a stator 30 housed within the housing 50.

[0162] 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.

[0163] A sensor for detecting the magnetic force of the sensing magnet 60 can be mounted on a printed circuit board 70. As an example, the sensor can be a Hall effect integrated circuit (IC). In this case, the sensor detects changes in the N and S poles of the sensing magnet 60 and generates a sensing signal.

[0164] Reference Figure 13 and Figure 14 The busbar 40a may include a body 42c and a plurality of terminal modules 110, 120, 130, 140, wherein the body 42c includes a first inner surface 42a facing the shaft 10 and a first outer surface 42b facing the inner surface of the housing 50, and the terminal modules are connected to the coils 31 of the stator 30 and are circuit-divided among each other.

[0165] The body 42c is a molded portion having an annular shape formed by injection molding. The body 42c includes a hole (not shown) in its central portion. Multiple terminal modules are disposed within the body 42c, and the end portions of the multiple terminal modules are configured to expose the exterior of the body 42c. Furthermore, the body 42c may have a multi-layered or single-layered structure, and can be integrally inserted into the injection mold with the multiple terminal modules 110, 120, 130, and 140.

[0166] Busbar 40a may include a plurality of terminal modules 110, 120, 130, and 140, which are circuitally divided. As an example, the plurality of terminal modules 110, 120, 130, and 140 may include phase terminals connected to the U-phase, V-phase, and W-phase power supplies, and a neutral terminal electrically connecting the phase terminals. In this case, the neutral terminal may be positioned inside a virtual line that connects the center of the body 42c of busbar 40a in the radial direction. In this case, the virtual line may be a circle formed circumferentially when viewed from above, and "inside" may be the side of this circle closer to the center C1. Additionally, some areas of the phase terminals may be configured to overlap with the neutral terminal in the axial direction, but the invention is not limited thereto.

[0167] For reference, in embodiments of the present invention, the plurality of terminal modules 110, 120, 130, 140, which are divided by circuitry, can be defined as a plurality of terminal modules 110, 120, 130, 140 connected to the coils 31 of the stator 30 but divided and forming independent motor control circuits (see [link]). Figure 19 and Figure 20 ).

[0168] According to an exemplary embodiment, busbar 40a includes a first terminal module 110, a second terminal module 120, a third terminal module 130, and a fourth terminal module 140, which are divided by circuitry (see [link]). Figure 13 and Figure 20 ).

[0169] For reference, although an example of a busbar 40a comprising four circuit-divided terminal modules has been described in an embodiment of the invention, according to another embodiment of the invention, the busbar may also comprise three or fewer, or five or more circuit-divided terminal modules.

[0170] Preferably, the first terminal module 110, the second terminal module 120, the third terminal module 130 and the fourth terminal module 140 are configured to be rotationally symmetrical about the center C1 of the stator 30 (or the center of the busbar).

[0171] As an example, the first terminal module 110, the second terminal module 120, the third terminal module 130 and the fourth terminal module 140 are arranged at 90° intervals to be rotationally symmetrical about the center C1 of the stator 30.

[0172] In other words, in order to manufacture multiple terminal modules 110, 120, 130, and 140 divided by circuitry, various terminals of different shapes should be provided for each position of the terminal module. In this case, since the number of molds used to manufacture the terminals inevitably increases to manufacture various types of terminals, there are problems of complex manufacturing process and increased manufacturing cost.

[0173] However, in this embodiment, since multiple terminal modules 110, 120, 130, and 140 divided by circuitry can be manufactured using only one type of terminal module, the following advantages can be obtained: minimizing the number of molds used to manufacture terminal modules 110, 120, 130, and 140, simplifying the manufacturing process, and reducing manufacturing costs.

[0174] More specifically, the first terminal module 110 includes three phase terminals and a first neutral terminal 118, the second terminal module 120 includes three phase terminals and a second neutral terminal 128, the third terminal module 130 includes three phase terminals and a third neutral terminal 138, and the fourth terminal module 140 includes three phase terminals and a fourth neutral terminal 148.

[0175] As an example, the first terminal module 110 includes: a 1-1 phase terminal 112 (e.g., U1 phase), a 1-2 phase terminal 114 (e.g., V1 phase), and a 1-3 phase terminal 116 (e.g., W1 phase), which are exposed from the first outer surface 42b of the body 42c and are spaced apart at 30° intervals around the center C1 of the stator 30; and a first neutral terminal 118 exposed from the first inner surface 42a of the body 42c.

[0176] The second terminal module 120 includes: a 2-1 phase terminal 122 (e.g., U2 phase), a 2-2 phase terminal 124 (e.g., V2 phase), and a 2-3 phase terminal 126 (e.g., W2 phase), which are exposed from the first outer surface 42b of the body 42c and are spaced apart at 30° intervals around the center C1 of the stator 30; and a second neutral terminal 128 exposed from the first inner surface 42a of the body 42c.

[0177] The third terminal module 130 includes: a 3-1 phase terminal 132 (e.g., U3 phase), a 3-2 phase terminal 134 (e.g., V3 phase), and a 3-3 phase terminal 136 (e.g., W3 phase), which are exposed from the first outer surface 42b of the body 42c and are spaced apart at 30° intervals around the center C1 of the stator 30; and a third neutral terminal 138 exposed from the first inner surface 42a of the body 42c.

[0178] The fourth terminal module 140 includes: a 4-1 phase terminal 142 (e.g., U4 phase), a 4-2 phase terminal 144 (e.g., V4 phase), and a 4-3 phase terminal 146 (e.g., W4 phase), which are exposed from the first outer surface 42b of the body 42c and are spaced apart at 30° intervals around the center C1 of the stator 30; and a fourth neutral terminal 148, which is exposed from the first inner surface 42a of the body 42c.

[0179] Reference Figure 13 Phase 1-1 terminal 112 surrounds the center C1 of stator 30 along the 12 o'clock direction (based on...) Figure 13 The 1-2 phase terminal 114 is configured to be spaced 30° from the 1-1 phase terminal 112 around the center C1 of the stator 30, and the 1-3 phase terminal 116 is configured to be spaced 30° from the 1-2 phase terminal 114 around the center C1 of the stator 30. As an example, the 1-1 phase terminal 112, the 1-2 phase terminal 114, and the 1-3 phase terminal 116 may be located in the first quadrant of a quadrant divided based on the vertical axes (x-axis and y-axis) passing through the center C1 of the stator 30.

[0180] Phase 2-1 terminal 122 surrounds the center C1 of stator 30 along the 3 o'clock direction (based on...) Figure 13 The 2-2 phase terminal 124 is configured to be spaced 30° from the 2-1 phase terminal 122 around the center C1 of the stator 30, and the 2-3 phase terminal 126 is configured to be spaced 30° from the 2-2 phase terminal 124 around the center C1 of the stator 30. As an example, the 2-1 phase terminal 122, the 2-2 phase terminal 124, and the 2-3 phase terminal 126 may be located in the fourth quadrant of a quadrant divided based on the vertical axes (x-axis and y-axis) passing through the center C1 of the stator 30.

[0181] Phase 3-1 terminal 132 surrounds the center C1 of stator 30 along the 6 o'clock direction (based on...) Figure 13 The 3-2 phase terminal 134 is configured to be spaced 30° from the 3-1 phase terminal 132 around the center C1 of the stator 30, and the 3-3 phase terminal 136 is configured to be 30° from the 3-2 phase terminal 134 around the center C1 of the stator 30. As an example, the 3-1 phase terminal 132, the 3-2 phase terminal 134, and the 3-3 phase terminal 136 may be located in the third quadrant of a quadrant divided based on the vertical axes (x-axis and y-axis) passing through the center C1 of the stator 30.

[0182] Phase 4-1 terminal 142 surrounds the center C1 of stator 30 along the 9 o'clock direction (based on...) Figure 13The 4-2 phase terminal 144 is configured to be spaced 30° from the 4-1 phase terminal 142 around the center C1 of the stator 30, and the 4-3 phase terminal 146 is configured to be spaced 30° from the 4-2 phase terminal 144 around the center C1 of the stator 30. As an example, the 4-1 phase terminal 142, the 4-2 phase terminal 144, and the 4-3 phase terminal 146 may be located in the second quadrant of a quadrant divided based on the vertical axes (x-axis and y-axis) passing through the center C1 of the stator 30.

[0183] More specifically, the 1-1 phase terminal 112 is arranged around the center C1 of the stator 30 in the 12 o'clock direction, and the 1-2 phase terminal 114, 1-3 phase terminal 116, 2-1 phase terminal 122, 2-2 phase terminal 124, 2-3 phase terminal 126, 3-1 phase terminal 132, 3-2 phase terminal 134, 3-3 phase terminal 136, 4-1 phase terminal 142, 4-2 phase terminal 144 and 4-3 phase terminal 146 are arranged sequentially and spaced apart at 30° intervals.

[0184] Preferably, the 1-1 phase terminal 112, 1-2 phase terminal 114, 1-3 phase terminal 116, 2-1 phase terminal 122, 2-2 phase terminal 124, 2-3 phase terminal 126, 3-1 phase terminal 132, 3-2 phase terminal 134, 3-3 phase terminal 136, 4-1 phase terminal 142, 4-2 phase terminal 144, and 4-3 phase terminal 146 are formed with identical structures (identical shapes). Therefore, since multiple phase terminals constituting four independent terminal modules that are different from each other can be manufactured using a single mold, there are advantages such as simple manufacturing process and reduced manufacturing cost.

[0185] Reference Figure 15 and Figure 16 Each of the plurality of phase terminals (phase 1-1, phase 1-2, phase 1-3, phase 2-1, phase 2-2, phase 2-3, phase 3-1, phase 3-2, phase 3-3, phase 4-1, phase 4-2, and phase 4-3) may include a phase terminal body 101 and a protruding phase terminal portion 102, the protruding phase terminal portion 102 protruding from the phase terminal body 101 in the radial direction of the stator 30. Hereinafter, the phase terminal body 101 and the protruding phase terminal portion 102 will be described based on the phase 1-1 phase terminal 112.

[0186] The phase terminal body 101 can be formed as a straight strip-type member (or a strip-type member with an arc shape having a predetermined curvature). The phase terminal body 101 and the protruding phase terminal portion 102 can be divided and described only according to their shape and functional characteristics, and can be an integrally connected member.

[0187] As an example, the phase terminal body 101 of phase terminal 112 can be formed as a straight strip-type member. In this case, the phase terminal bodies 101 of some of the multiple phase terminals can be configured to overlap with the neutral terminal in the axial direction, and the phase terminal bodies 101 of other phase terminals can be configured not to overlap with the neutral terminal in the axial direction. (Refer to...) Figure 13 Some of the phase terminals 112, 122, 132, and 142 among the multiple phase terminals can be configured not to overlap with the neutral terminal body 103 in the axial direction.

[0188] The protruding phase terminal portion 102 extends from the phase terminal body 101 along the radial direction of the stator 30 and protrudes toward the first outer surface 42b of the body 42c. The end portion of the protruding phase terminal portion 102 is formed into a hook-like curved shape.

[0189] The protruding phase terminal portion 102 is electrically connected to the coil 31 of the stator 30. As an example, the protruding phase terminal portion 102 may be fused to the coil 31 of the stator 30.

[0190] The phase terminal body 101 and the protruding phase terminal portion 102 can be formed as a single-layer structure or a double-layer structure (multi-layer structure), and the present invention is not constrained or limited by the connection structure between the phase terminal body 101 and the protruding phase terminal portion 102.

[0191] The first neutral terminal 118 electrically connects (e.g., phase 1-1 terminal 112 of phase U1), (e.g., phase 1-2 terminal 114 of phase V1), and (e.g., phase 1-3 terminal 116 of phase W1). As an example, the first neutral terminal 118 may be located in the first quadrant of a quadrant divided based on the vertical axes (x-axis and y-axis) passing through the center C1 of the stator 30.

[0192] The second neutral terminal 128 electrically connects (e.g., phase 2-1 terminal 122 of phase U2), (e.g., phase 2-2 terminal 124 of phase V2), and (e.g., phase 2-3 terminal 126 of phase W2). As an example, the second neutral terminal 128 may be located in the second quadrant of a quadrant divided based on the vertical axes (x-axis and y-axis) passing through the center C1 of the stator 30.

[0193] The third neutral terminal 138 electrically connects (e.g., the 3-1 phase terminal 132 of phase U3), (e.g., the 3-2 phase terminal 134 of phase V3), and (e.g., the 3-3 phase terminal 136 of phase W3). As an example, the third neutral terminal 138 may be located in the third quadrant of a quadrant divided based on the vertical axes (x-axis and y-axis) passing through the center C1 of the stator 30.

[0194] The fourth neutral terminal 148 electrically connects (e.g., the 4-1 phase terminal 142 of U4 phase), (e.g., the 4-2 phase terminal 144 of V4 phase), and (e.g., the 4-3 phase terminal 146 of W4 phase). As an example, the fourth neutral terminal 148 may be located in the second quadrant of a quadrant divided based on the vertical axes (x-axis and y-axis) passing through the center C1 of the stator 30.

[0195] Preferably, the first neutral terminal 118, the second neutral terminal 128, the third neutral terminal 138, and the fourth neutral terminal 148 are formed with identical structures (identical shapes). Therefore, since multiple neutral terminals constituting four independent terminal modules that are different from each other can be manufactured using a single mold, there are advantages such as simple manufacturing process and reduced manufacturing cost.

[0196] Reference Figure 17 and Figure 18 Each of the first neutral terminal 118, the second neutral terminal 128, the third neutral terminal 138, and the fourth neutral terminal 148 includes a neutral terminal body 103 and a protruding neutral terminal portion 104 extending from the neutral terminal body 103 in the radial direction of the stator 30.

[0197] The neutral terminal body 103 can be formed as a strip-shaped member with a curved surface. The neutral terminal body 103 and the protruding neutral terminal portion 104 can be divided and described solely based on their shape and functional characteristics, and can be an integrally connected member.

[0198] As an example, the neutral terminal body 103 of each of the first neutral terminal 118, the second neutral terminal 128, the third neutral terminal 138 and the fourth neutral terminal 148 can be formed as a strip-shaped member having an arcuate shape with a predetermined curvature.

[0199] The protruding neutral terminal portion 104 extends from the neutral terminal body 103 along the radial direction of the stator 30 and protrudes outward from the first inner surface 42a of the body 42c. Three protruding neutral terminal portions 104 are provided on the neutral terminal body 103, and the end portions of the protruding neutral terminal portions 104 are formed into a hook-like curved shape.

[0200] The protruding neutral terminal portion 104 is electrically connected to the coil 31 of the stator 30, which is connected to the U-phase, V-phase, and W-phase power supplies. As an example, the protruding neutral terminal portion 104 may be fused to the coil 31 of the stator 30.

[0201] The neutral terminal body 103 and the protruding neutral terminal portion 104 can be formed as a single-layer structure or a double-layer structure (multi-layer structure), but the present invention is not constrained or limited by the connection structure between the neutral terminal body 103 and the protruding neutral terminal portion 104.

[0202] As described above, in the embodiments of the present invention, since the phase terminals 112, 114, 116, 122, 124, 126, 132, 134, 136 are exposed from the first outer surface 42b of the body 42c, and the neutral terminals 118, 128, 138, 148 are exposed from the first inner surface 42a of the body 42c, the following advantageous effects can be obtained: minimizing the size increase of the busbar due to the increase in the number of phase terminals and neutral terminals, and manufacturing a smaller motor.

[0203] In other words, although all the multiple phase terminals and neutral terminals constituting multiple (e.g., four) motor control circuits divided by circuitry can also be exposed from the first outer surface of the body, in this case, since it is unavoidable to ensure a predetermined or wider width (in the radial direction of the stator) and a predetermined or higher height (in the longitudinal direction of the shaft) of the body so that the multiple phase terminals and neutral terminals on the first outer surface of the body are arranged not to overlap with each other, there are the following problems: it is difficult to form a body with a size smaller than or equal to the predetermined size, and the overall size of the busbar increases.

[0204] However, in this embodiment, since the phase terminals 112, 114, 116, 122, 124, 126, 132, 134, and 136 are exposed from the first outer surface 42b of the body 42c, and the neutral terminals 118, 128, 138, and 148 are exposed from the first inner surface 42a of the body 42c, the multiple phase terminals and neutral terminals can be arranged at the same intervals so that they do not overlap with each other even without increasing the size of the body 42c. Therefore, the following advantages can be obtained: minimizing the increase in the size of the busbar 40a, improving the design freedom and space utilization in the motor, and manufacturing a smaller motor.

[0205] Furthermore, in this embodiment, since multiple phase terminals 112, 114, 116, 122, 124, 126, 132, 134, 136 and multiple neutral terminals 118, 128, 138, 148 are provided with some areas between the body 42c inserted into the phase terminals and the neutral terminals, the following advantages can be obtained: improved insulation stability and reliability of the phase terminals and the neutral terminals, and improved workability (for coil welding operations).

[0206] The layout of phase terminals 112, 114, 116, 122, 124, 126, 132, 134, 136 and neutral terminals 118, 128, 138, 148 can be modified in various ways according to the required conditions and design specifications.

[0207] As an example, refer to Figure 14 Phase terminals (e.g., phase terminal 112) and neutral terminals (e.g., neutral terminal 118) may be configured to form different layers from each other in the axial direction of shaft 10.

[0208] More specifically, the phase terminal body 101 may be configured to form a first layer F1 in the body 42c, and the neutral terminal body 103 may be configured to form a second layer F2 in the body 42c, which is disposed below (or above) the phase terminal body 101.

[0209] As described above, since the phase terminal body 101 is disposed in the first layer F1 and the neutral terminal body 103 is disposed in the second layer F2, the following advantageous effects can be obtained: minimizing the width W (of the stator in the radial direction) and reducing the amount of material used for molding the body 42c.

[0210] As another example, see Figure 21 Phase terminals 112, 114, 116, 122, 124, 126, 132, 134, 136 and neutral terminals 118, 128, 138, 148 can also be arranged to form the same layer (e.g., the first layer) in the axial direction of shaft 10.

[0211] More specifically, the phase terminal body 101 of the phase terminal (e.g., phase terminal 112) may be configured to form a first layer F1 in the body 42c, and the neutral terminal body 103 of the neutral terminal (e.g., neutral terminal 118) may be configured in the first layer F1 in the body 42c.

[0212] As described above, since the phase terminal body 101 and the neutral terminal body 103 are configured to form a first layer F1, the following advantages can be obtained: minimizing the thickness T1 of the body 42c (in the axial direction of the shaft) and reducing the amount of material used to mold the body 42c.

[0213] Although the invention has been described above with reference to exemplary embodiments, it will be understood by those skilled in the art that various modifications and alterations can be made to the invention without departing from the spirit and scope of the invention as defined by the appended claims.

[0214] Figure Labels

[0215] 10: Shaft, 20: Rotor, 30: Stator, 31: Coil, 40: Second busbar, 42: Second body, 50: Housing, 80: First busbar, 82: First body.

Claims

1. A motor, comprising: case; Stator, the stator being disposed within the housing; Rotor, the rotor being disposed in the stator; The first busbar is disposed below the stator, and The second busbar is disposed on the stator. The first busbar includes multiple neutral terminals, which are connected to the coils of the stator and divide the circuit. The plurality of neutral terminals are arranged to be rotationally symmetrical about the center of the stator. The second busbar includes multiple terminal modules that are connected to the coils of the stator and perform circuit division. Each terminal module in the terminal module includes multiple phase terminals.

2. The motor according to claim 1, wherein: The first busbar includes a first neutral terminal, a second neutral terminal, a third neutral terminal, and a fourth neutral terminal; and The first neutral terminal, the second neutral terminal, the third neutral terminal, and the fourth neutral terminal are arranged at 90° intervals to be rotationally symmetrical about the center of the stator.

3. The motor according to claim 2, wherein, The first neutral terminal, the second neutral terminal, the third neutral terminal, and the fourth neutral terminal are formed with identical structures.

4. The motor according to claim 1, wherein, Each of the neutral terminals includes a neutral terminal body and a protruding neutral terminal portion extending from the neutral terminal body along the radial direction of the stator.

5. The motor according to claim 4, wherein: The first busbar includes a first body, which is formed to surround a plurality of neutral terminals; and The first busbar is supported by the inner surface of the housing.

6. The motor according to claim 5, wherein: The first body includes a first inner surface and a first outer surface; and The first outer surface is supported to press against the inner surface of the housing.

7. The motor according to claim 6, wherein, The protruding neutral terminal portion protrudes toward the first inner surface.

8. The motor according to claim 2, wherein: The second busbar includes: a first terminal module connected to the first neutral terminal circuit, a second terminal module connected to the second neutral terminal circuit, a third terminal module connected to the third neutral terminal circuit, and a fourth terminal module connected to the fourth neutral terminal circuit; and The first terminal module, the second terminal module, the third terminal module, and the fourth terminal module are configured to be rotationally symmetrical about the center of the stator.

9. The motor according to claim 8, wherein: The first terminal module includes a 1-1 phase terminal, a 1-2 phase terminal, and a 1-3 phase terminal, which are spaced apart at 30° intervals around the center of the stator; The second terminal module includes 2-1 phase terminals, 2-2 phase terminals, and 2-3 phase terminals arranged to be spaced apart at 30° intervals around the center of the stator; The third terminal module includes 3-1 phase terminals, 3-2 phase terminals, and 3-3 phase terminals spaced apart at 30° intervals around the center of the stator; and The fourth terminal module includes a 4-1 phase terminal, a 4-2 phase terminal, and a 4-3 phase terminal arranged to be spaced apart at 30° intervals around the center of the stator.

10. The motor according to claim 9, wherein, The 1-1 phase terminal, the 1-2 phase terminal, the 1-3 phase terminal, the 2-1 phase terminal, the 2-2 phase terminal, the 2-3 phase terminal, the 3-1 phase terminal, the 3-2 phase terminal, the 3-3 phase terminal, the 4-1 phase terminal, the 4-2 phase terminal, and the 4-3 phase terminal are formed with the same structure.

11. The motor according to claim 1, wherein: The second busbar includes a second molded part formed to surround the plurality of phase terminals; and Each phase terminal includes a phase terminal body and a protruding phase terminal portion extending from the phase terminal body along the radial direction of the stator.

Images