Motor

Abstract

The present invention may provide a motor including: a shaft; a rotor coupled to the shaft; and a stator disposed corresponding to the rotor, the stator including a stator core, an insulator coupled to the stator core, and a coil disposed on the insulator, in which the coil includes a first coil and a second coil separated from each other on a circuit, the insulator including a first region in which the first coil is disposed and a second region in which the second coil is disposed, and the motor includes a first bus bar electrically connected to the first coil and a second bus bar electrically connected to the second coil.

Description

Technical Field

[0001] Embodiments relate to a motor. Background Art

[0002] Generally, the rotor of the motor rotates by electromagnetic interaction between the rotor and the stator. In this case, the shaft connected to the rotor rotates to generate a rotational driving force.

[0003] The rotor and the stator are housed in a housing. The housing is a hollow cylindrical member. One side of the housing is open.

[0004] The stator may include a stator core and a coil wound around the stator core. The coil may be connected to a bus bar. The bus bar is supported in a bus bar holder. Three bus bars having a U phase, a V phase, and a W phase may be provided. The bus bar holder may be a mold component surrounding the bus bar.

[0005] The coil can be wound in a double manner so that the coils are separated in circuit for fail-safe of the motor. This is to enable the other coil to be used when one coil breaks. In the circumferential direction of the stator, one coil is located on one side and the other coil is located on the other side. Specifically, in the axial direction, any one of the two coils separated in circuit occupies half of the stator in the circumferential direction, and the other coil occupies the remaining half of the stator.

[0006] However, in a motor having such a configuration, a magnetic field is generated only at one half side of the stator in the circumferential direction when the motor is operated, and thus there is a problem that the motor is operated in a state where the magnetic field is unbalanced. Summary of the invention

[0007] [Technical issues]

[0008] Therefore, an embodiment is directed to solving the above-described problems and is directed to provide a motor in which a coil is wound in a doubly manner so that the coil is separated in circuit and a magnetic field is uniformly generated.

[0009] Objects to be solved by the present invention are not limited to the objects described above, and other objects not described above will be clearly understood by those skilled in the art from the following description.

[0010] [Technical solution]

[0011] One aspect of the present invention provides a motor, which includes: a shaft; a rotor connected to the shaft; and a stator arranged to correspond to the rotor, wherein the stator includes a stator core, an insulator connected to the stator core, and a coil arranged on the insulator, the coil including a first coil and a second coil separated in an electrical circuit, the insulator including a first area where the first coil is arranged and a second area where the second coil is arranged, and the motor includes a first bus bar electrically connected to the first coil and a second bus bar electrically connected to the second coil.

[0012] The first bus bar and the second bus bar may be supported by the same bus bar holder.

[0013] The first bus bar and the second bus bar may be stacked in the axial direction.

[0014] The first bus bar may include a 1-1 bus bar body, a 1-2 connection terminal protruding from the 1-1 bus bar body and connected to the first coil, and a 1-3 connection terminal protruding from the 1-1 bus bar body and connected to an external power supply, the second bus bar may include a 2-1 bus bar body, a 2-2 connection terminal protruding from the 2-1 body and connected to the second coil, and a 2-3 connection terminal protruding from the 2-1 body and connected to the external power supply, and the contact area between the first coil and the 1-2 connection terminal may be arranged not to overlap with the contact area between the second coil and the 2-2 connection terminal in the axial direction.

[0015] The first coil may be disposed outside the second coil in the radial direction, and the 1-3 connecting terminal may be disposed outside the 2-3 connecting terminal in the radial direction.

[0016] The 1-3 connecting terminal may be located at the outermost outer side of the 1-2 connecting terminal in the radial direction, and the 2-3 connecting terminal may be disposed to be located at the outermost inner side of the 2-2 connecting terminal in the radial direction.

[0017] The 1-1 bus bar body and the 2-1 bus bar body may be disposed to overlap in the axial direction.

[0018] A contact area between the first coil and the 1-2 connection terminal and a contact area between the second coil and the 2-2 connection terminal may be coaxially disposed based on the center of the bus bar.

[0019] The first bus bar and the second bus bar may be supported by the same bus bar holder, and at least any one of a plurality of 1-3 connection terminals each identical to the 1-3 connection terminal may be disposed to overlap the bus bar holder in the axial direction.

[0020] The insulator may include a guide separating the first region and the second region.

[0021] [Beneficial Effects]

[0022] According to the embodiment, since two coils separated in circuit are wound around one tooth of the stator, there is an advantage in generating a uniform magnetic field.

[0023] According to the embodiment, since the first bus bar and the second bus bar are stacked in the axial direction, there is an advantage of being easily connected with the first coil and the second coil wound around one tooth of the stator.

[0024] According to the embodiment, since the contact area between the first coil and the first bus bar and the contact area between the second coil and the second bus bar are set not to overlap each other, there is an advantage of easy connection with the first coil and the second coil wound around one tooth of the stator. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a view showing a motor according to an embodiment.

[0026] Figure 2 It is shown Figure 1 A view of the stator is shown in the axial direction.

[0027] Figure 3 is a view showing a first coil wound around a stator.

[0028] Figure 4 is a view showing a second coil wound around the stator.

[0029] Figure 5 It is a perspective view showing an insulator.

[0030] Figure 6 is a view showing a first bus bar, a second bus bar, and a bus bar module.

[0031] Figure 7 is a view showing a first bus bar.

[0032] Figure 8 is a view showing a second bus bar.

[0033] Fig. 9 is a side view showing a first bus bar and a second bus bar.

[0034] Fig.10 is a view showing the first bus bar and the second bus bar in the axial direction.

[0035] Fig.11 is a view showing the first bus bar, the second bus bar, and the bus bar mold in the axial direction. DETAILED DESCRIPTION

[0036] The direction parallel to the longitudinal direction (vertical direction) of the axis is called the axial direction, the direction perpendicular to the axial direction based on the axis is called the radial direction, and the direction along a circle having a radius in the radial direction from the axis is called the circumferential direction.

[0037] Figure 1 is a view showing a motor according to an embodiment.

[0038] Reference Figure 1 , the motor according to the embodiment may include a shaft 100, a rotor 200, a stator 300, and a housing 700. Hereinafter, the term "inward" refers to a direction from the housing 700 toward the shaft 100 as the center of the motor, and the term "outward" refers to a direction opposite to "inward", that is, a direction from the shaft 100 toward the housing 700. In addition, the radial direction is based on the axis of the shaft 100.

[0039] The shaft 100 may be coupled to the rotor 200. When current is supplied and electromagnetic interaction occurs between the rotor 200 and the stator 300, the rotor 200 rotates, and the shaft 100 rotates together with the rotation of the rotor 200.

[0040] The rotor 200 rotates due to electrical interaction with the stator 300. The rotor 200 may be disposed inside the stator 300.

[0041] The stator 300 is disposed outside the rotor 200. The stator 300 may include a stator core 310, an insulator 320 mounted on the stator core 310, and a coil 330. The coil 330 may be wound around the insulator 320. The insulator 320 is disposed between the coil 330 and the stator core 310, and serves to electrically insulate the stator core 310 from the coil 330. The coil 330 causes an electrical interaction with a magnet of the rotor 200.

[0042] The stator 300 and the rotor 200 are disposed inside the housing 700 .

[0043] Figure 2 It is shown Figure 1 A view of the stator 300 in the axial direction is shown, and Figure 3 is a view showing a first coil 330A wound around the stator 300 . Figure 4 is a view showing a second coil 330B wound around the stator 300, and Figure 5 3 is a perspective view showing the insulator 320 .

[0044] Reference Figures 2 to 5 , the stator 300 includes a first coil 330A and a second coil 330B. The first coil 330A and the second coil 330B are separated in circuit, and when any one of the first coil 330A and the second coil 330B is short-circuited, the other coil can be used.

[0045] The insulator 320 is provided on each tooth of the stator core 310. In addition, both the first coil 330A and the second coil 330B are wound around the insulator 320. The first coil 330A is wound to be located outside the second coil 330B in the radial direction. The first coil 330A may be wound around each insulator 320 to be located on the stator 300 to be located outside the second coil 330B.

[0046] The insulator 320 may include an insulator body 322 around which the coil 330 is wound, an outer guide 323 disposed at an outer side of the insulator body 322 , and an inner guide 324 disposed at an inner side of the insulator body 322 .

[0047] The insulator 320 may include a first region A1 around which the first coil 330A is wound and a second region A2 around which the second coil 330B is wound. The first region A1 and the second region A2 may be separated by a guide 321 .

[0048] The guide 321 protrudes from the insulator body 322 in contact with the coil 330 and spatially separates the space around which the first coil 330A is wound and the space around which the second coil 330B is wound. The guide 321 is located between the inner guide 323 and the outer guide 324 in the radial direction.

[0049] like Figure 3 As shown, the first coil 330A may be wound in the first area A1. Figure 4 As shown, the second coil 330B may be wound in the second area A2.

[0050] Figure 6 is a view showing a first bus bar 400, a second bus bar 500, and a bus bar holder 600, Figure 7 is a view showing the first bus bar 400, and Figure 8 is a view showing the second bus bar 500 .

[0051] Reference Figures 6 to 8 , the first bus bar 400 and the second bus bar 500 may be fixed by one bus bar holder 600. The first bus bar 400 and the second bus bar 500 may be arranged to be stacked in the axial direction. The bus bar holder 600 may be formed in an annular shape, and its cross section may be formed in a quadrilateral shape in which the length in the axial direction is greater than the width in the radial direction.

[0052] The first bus bar 400 is disposed below the second bus bar 500 . The first bus bar 400 may be provided as three bus bars having a U phase, a V phase, and a W phase. Each of the first bus bars 400 may include a 1-1 bus bar body 410 , a 1-2 connection terminal 420 , and a 1-3 connection terminal 430 .

[0053] The 1-1 bus bar body 410 is an arc-shaped member having a curved surface. The 1-1 bus bar body 410 may be provided in an upright form. That is, the cross section of the 1-1 bus bar body 410 may have a quadrilateral shape in which the length in the axial direction is greater than the width in the radial direction.

[0054] The 1-2 connection terminal 420 protrudes from the 1-1 bus bar body 410. For example, the 1-2 connection terminal 420 may be formed to be bent outward from the upper end of the 1-1 bus bar body 410. A plurality of 1-2 connection terminals 420 may be arranged at predetermined intervals. The 1-2 connection terminal 420 is electrically connected to the first coil 330A. The end of the 1-2 connection terminal 420 is formed to be bent into a hook shape to surround the first coil 330A.

[0055] The 1-3 connection terminal 430 protrudes from the 1-1 busbar body 410. For example, the 1-3 connection terminal 430 is formed to be bent outward from the upper end of the 1-1 busbar body 410 and then bent upward. The 1-3 connection terminal 430 is electrically connected to an external power source. The 1-3 connection terminals 430 of the first busbar 400 having the U phase, the V phase, and the W phase may be gathered and located at one position.

[0056] The second busbar 500 is located above the first busbar 400 . The second busbar 500 may be provided as three busbars having a U phase, a V phase, and a W phase. Each of the second busbars 500 may include a 2-1 busbar body 510 , a 2-2 connection terminal 520 , and a 2-3 connection terminal 530 .

[0057] The 2-1 bus bar body 510 is an arc-shaped member having a curved shape. The 2-1 bus bar body 510 may be provided in an upright form. That is, the cross section of the 2-1 bus bar body 510 may have a quadrilateral shape in which the length in the axial direction is greater than the width in the radial direction.

[0058] The 2-2 connection terminal 520 protrudes from the 2-1 bus bar body 510. For example, the 2-2 connection terminal 520 may be formed to be bent outward from the upper end of the 2-1 bus bar body 510. A plurality of 2-2 connection terminals 520 may be arranged at predetermined intervals. The 2-2 connection terminal 520 is electrically connected to the second coil 330B. The end of the 2-2 connection terminal 520 may be formed to be bent into a hook shape to surround the second coil 330B.

[0059] The 2-3 connection terminal 530 protrudes from the 2-1 busbar body 510. For example, the 2-3 connection terminal 530 may be formed to be bent outward from the upper end of the 2-1 busbar body 510 and then bent upward. The 2-3 connection terminal 530 is electrically connected to an external power source. The 2-3 connection terminals 530 of the three second busbars 500 having the U phase, the V phase, and the W phase may be gathered and located at one position.

[0060] The 1-2 connection terminal 420 and the 2-2 connection terminal 520 are exposed to the outside from the bus bar holder 600. In addition, the 1-3 connection terminal 430 and the 2-3 connection terminal 530 are exposed to the outside from the bus bar holder 600. The upper ends of the 1-3 connection terminal 430 and the upper ends of the 2-3 connection terminal 530 are located above the upper surface of the bus bar holder 600.

[0061] Fig. 9 is a side view showing the first bus bar 400 and the second bus bar 500, and Fig.10 is a view showing the first bus bar 400 and the second bus bar 500 in the axial direction.

[0062] Reference Fig. 9 and Fig.10 , the first bus bar 400 and the second bus bar 500 are stacked in the axial direction. The 1-1 bus bar body 410 and the 2-1 bus bar body 510 are arranged to overlap in the axial direction. Therefore, when considering the positions of both the first coil 330A and the second coil 330B wound around one tooth of the stator core 310, the 1-2 connection terminal 420 and the 2-2 connection terminal 520 should be arranged so that their positions do not overlap.

[0063] To this end, in the first and second bus bars 400 and 500 , the contact area C1 between the first coil 330A and the 1-2 connection terminal 420 and the contact area C1 between the second coil 330B and the 2-2 connection terminal 520 may be disposed to be shifted in the circumferential direction without overlapping in the axial direction.

[0064] In this case, a contact area C1 between the first coil 330A and the 1-2 connection terminal 420 and a contact area C2 between the second coil 330B and the 2-2 connection terminal 520 may be coaxially disposed based on the axis C.

[0065] As described above, since the first bus bar 400 and the second bus bar 500 are stacked in the axial direction to correspond to the first coil 330A and the second coil 330B, there is an advantage that the connection between the first coil 330A and the first bus bar 400 and the connection between the second coil 330B and the second bus bar 500 are easy.

[0066] Meanwhile, when viewed in the axial direction, generally the 1-3 connection terminal 430 may be disposed on one side in the circumferential direction, and the 2-3 connection terminal 530 may be disposed on the other side. The angle between the 1-3 connection terminal 430 and the 2-3 connection terminal 530 in the circumferential direction may be greater than 90° and less than 180°.

[0067] The 1-3 connection terminal 430 may be located at the outermost outer side of the 1-2 connection terminal 420 in the radial direction. In addition, the 2-3 connection terminal 530 may be located at the outermost inner side of the 2-2 connection terminal 520 in the radial direction.

[0068] Fig.11 1 is a view showing the first bus bar 400 , the second bus bar 500 , and the bus bar holder 600 in the axial direction.

[0069] Reference Fig.11 The 1-3 connection terminal 430 located at the innermost side among the plurality of 1-3 connection terminals 430 may be disposed to overlap the bus bar holder 600 in the axial direction. The corresponding 1-3 connection terminals 430 may be exposed from the upper surface of the bus bar holder 600.

[0070] As described above, in the motor according to the embodiment, the first coil 330A is connected to the first bus bar 400, the second coil 330B is connected to the second bus bar 500, and the first coil 330A and the second coil 330B are evenly arranged in the circumferential direction, thereby having the advantage of being able to generate a uniform magnetic field while achieving fault safety.

[0071] The embodiments described above can be applied to various vehicle devices, home appliances, and the like.

Claims

1. A motor, comprising: axis; a rotor coupled to the shaft; as well as a stator arranged to correspond to the rotor, The stator includes a stator core, an insulator connected to the stator core, and a coil disposed on the insulator. The coil includes a first coil and a second coil which are separated in circuit, The insulator includes a first region where the first coil is disposed and a second region where the second coil is disposed, and The motor includes a first bus bar electrically connected to the first coil and a second bus bar electrically connected to the second coil.

2. The motor according to claim 1, wherein: The first bus bar and the second bus bar are supported by the same bus bar holder.

3. The motor according to claim 1, wherein: The first bus bar and the second bus bar are stacked in an axial direction.

4. The motor according to claim 1, wherein: The first bus bar includes a 1-1 bus bar body, a 1-2 connection terminal protruding from the 1-1 bus bar body and connected to the first coil, and a 1-3 connection terminal protruding from the 1-1 bus bar body and connected to an external power source; The second bus bar includes a 2-1 bus bar body, a 2-2 connection terminal protruding from the 2-1 body and connected to the second coil, and a 2-3 connection terminal protruding from the 2-1 body and connected to the external power source; and A contact area between the first coil and the 1-2 connecting terminal is arranged not to overlap a contact area between the second coil and the 2-2 connecting terminal in an axial direction.

5. The motor according to claim 4, wherein: The first coil is arranged to be located outside the second coil in a radial direction; and The 1-3 connecting terminal is arranged to be located outside the 2-3 connecting terminal in the radial direction.

6. The motor according to claim 4, wherein: The 1-3 connecting terminal is located at the outermost side of the 1-2 connecting terminal in the radial direction; and The 2-3 connecting terminal is arranged to be located inwardly of the outermost sides of the 2-2 connecting terminal in the radial direction.

7. The motor according to claim 4, wherein: The 1-1 bus bar body and the 2-1 bus bar body are disposed to overlap in the axial direction.

8. The motor according to claim 4, wherein: A contact area between the first coil and the 1-2 connection terminal and a contact area between the second coil and the 2-2 connection terminal are coaxially disposed based on a center of a bus bar.

9. The motor according to claim 4, wherein: The first bus bar and the second bus bar are supported by the same bus bar holder; and At least any one of a plurality of 1-3 connection terminals, each of which is identical to the 1-3 connection terminal, is disposed so as to overlap with the bus bar holder in the axial direction.

10. The motor according to claim 1, wherein The insulator includes a guide that separates the first region and the second region.

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