WO2019065449A1 - Moteur - Google Patents

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Publication number
WO2019065449A1
WO2019065449A1 PCT/JP2018/034807 JP2018034807W WO2019065449A1 WO 2019065449 A1 WO2019065449 A1 WO 2019065449A1 JP 2018034807 W JP2018034807 W JP 2018034807W WO 2019065449 A1 WO2019065449 A1 WO 2019065449A1
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WO
WIPO (PCT)
Prior art keywords
bus bar
wide
narrow
axial direction
portions
Prior art date
Application number
PCT/JP2018/034807
Other languages
English (en)
Japanese (ja)
Inventor
佳明 山下
Original Assignee
日本電産株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電産株式会社 filed Critical 日本電産株式会社
Priority to CN201880050923.4A priority Critical patent/CN111033955B/zh
Publication of WO2019065449A1 publication Critical patent/WO2019065449A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto

Definitions

  • the present invention relates to a motor.
  • Patent Document 1 describes a rotating electrical machine for an internal combustion engine provided with such a bus bar.
  • the bus bar as described above has a relatively large axial dimension. Therefore, for example, when adopting a configuration in which one bus bar is straddled by another bus bar, the dimension in the axial direction becomes large at the intersection of the bus bars, and there is a problem that the rotary electric machine becomes large in the axial direction.
  • One aspect of the motor of the present invention includes a rotor having a shaft disposed along a central axis, a plurality of coils, and a stator radially opposed to the rotor with a gap therebetween, and extending from the coils And a plurality of bus bars electrically connected to the conductive wires.
  • the bus bar is a plate whose plate surface is in the axial direction and extends along a plane orthogonal to the axial direction, and the plurality of bus bars include a first bus bar and a second bus bar, and the first bus bar is A first wide width portion, and a first narrow width portion connected to the first wide width portion in a direction in which the first bus bar extends, and having a smaller axial dimension than the first wide width portion;
  • the end on one side in the axial direction in the narrow portion is disposed on the other side in the axial direction than the end on the one side in the axial direction in the first wide portion, and the first narrow portion is more axial than the second bus bar
  • the motor which is disposed opposite to the other side with a gap on the other side.
  • a motor which has a plurality of plate-like bus bars whose plate surfaces extend in the axial direction and which can be miniaturized in the axial direction.
  • FIG. 1 is a cross-sectional view showing the motor of the first embodiment.
  • FIG. 2 is a perspective view showing a plurality of bus bars of the first embodiment.
  • FIG. 3 is a perspective view showing the bus bar of the first embodiment.
  • FIG. 4 is a view of a part of the bus bar of the first embodiment viewed in the direction orthogonal to the plate surface.
  • FIG. 5 is a view of a part of the bus bar of the modified example in the first embodiment, viewed in the direction orthogonal to the plate surface.
  • FIG. 6 is a view of a part of the bus bar of the second embodiment viewed in the direction orthogonal to the plate surface.
  • the Z-axis direction appropriately shown in each drawing is a vertical direction with the positive side as the upper side and the negative side as the lower side.
  • a central axis J appropriately shown in each drawing is an imaginary line which is parallel to the Z-axis direction and extends in the vertical direction.
  • the axial direction of the central axis J that is, the direction parallel to the vertical direction
  • the radial direction centering on the central axis J is simply referred to as “radial direction”.
  • the circumferential direction centered on is simply referred to as "circumferential direction”.
  • the circumferential direction is appropriately indicated by an arrow ⁇ .
  • the positive side in the Z-axis direction in the axial direction is called “upper side”
  • the negative side in the Z-axis direction in the axial direction is called “lower side”.
  • the lower side corresponds to one side in the axial direction
  • the upper side corresponds to the other side in the axial direction.
  • the side that proceeds clockwise as viewed from the upper side in the circumferential direction from the upper side to the lower side that is, the side that proceeds in the direction opposite to the direction of the arrow ⁇ will be referred to as “one side in the circumferential direction”.
  • the side advancing in the counterclockwise direction as viewed from the upper side to the lower side in the circumferential direction that is, the side advancing in the direction of the arrow ⁇ is referred to as “the other side in the circumferential direction”.
  • the vertical direction, the upper side, and the lower side are simply names for describing the relative positional relationship of each part, and the actual positional relationship may be a positional relationship other than the positional relationship indicated by these names. .
  • the motor 10 includes a housing 11, a rotor 20, bearings 51 and 52, a stator 30, a bearing holder 40, a bus bar unit 90, and a control device 80. .
  • the housing 11 accommodates each part of the motor 10.
  • the housing 11 is cylindrical around the central axis J.
  • the housing 11 holds the bearing 51 at the bottom on the lower side.
  • the rotor 20 has a shaft 21, a rotor core 22, and a magnet 23.
  • the shaft 21 is disposed along the central axis J.
  • the shaft 21 is rotatably supported by bearings 51 and 52.
  • the rotor core 22 has an annular shape fixed to the outer peripheral surface of the shaft 21.
  • the magnet 23 is fixed to the outer peripheral surface of the rotor core 22.
  • the bearing 51 rotatably supports the shaft 21 on the lower side of the rotor core 22.
  • the bearing 52 rotatably supports the shaft 21 on the upper side of the rotor core 22.
  • the bearings 51 and 52 are ball bearings.
  • the stator 30 faces the rotor 20 in the radial direction via a gap.
  • the stator 30 surrounds the rotor 20 at the radially outer side of the rotor 20.
  • the stator 30 has a stator core 31, an insulator 34, and a plurality of coils 35.
  • the stator core 31 has a core back 32 and a plurality of teeth 33.
  • the plurality of coils 35 are respectively attached to the plurality of teeth 33 via the insulators 34.
  • the coil 35 is configured by winding a conducting wire around the teeth 33 through the insulator 34.
  • a coil lead wire 36 is drawn upward from each coil 35.
  • the coil lead wire 36 is a conducting wire extending from the coil 35 and is an end of the conducting wire that constitutes the coil 35.
  • the bearing holder 40 is disposed on the upper side of the stator 30.
  • the bearing holder 40 has an annular shape centered on the central axis J.
  • the bearing holder 40 holds the bearing 52.
  • the bearing holder 40 is made of metal.
  • the bearing holder 40 has a holder hole 40 a which penetrates the bearing holder 40 in the axial direction.
  • the coil lead wire 36 is passed through the holder hole 40a.
  • the bus bar unit 90 is disposed on the upper side of the bearing holder 40.
  • the bus bar unit 90 has a bus bar holder 60 and a bus bar 70. That is, motor 10 includes bus bar holder 60 and a plurality of bus bars 70.
  • the bus bar holder 60 has an annular shape centering on the central axis J.
  • the bus bar holder 60 is fixed to the upper surface of the bearing holder 40.
  • the bus bar holder 60 is made of resin.
  • the bus bar 70 is held by the bus bar holder 60.
  • the bus bar 70 is supported by the bus bar holder 60 from the lower side.
  • the bus bar 70 is a plate whose plate surface is in the axial direction.
  • the thickness of the bus bar 70 is, for example, uniform.
  • the bus bar 70 extends along a plane orthogonal to the axial direction.
  • the plurality of bus bars 70 are arranged at equal intervals along the circumferential direction. In the present embodiment, the plurality of bus bars 70 have the same shape.
  • the plurality of bus bars 70 include bus bars 70A, 70B, and 70C as three bus bars 70, for example. In the following description, the bus bars 70A, 70B, and 70C are simply referred to as the bus bars 70 unless otherwise specified.
  • the bus bar 70 has a first member 71, a second member 72, and a power supply connection portion 73.
  • the first member 71, the second member 72, and the power supply connection portion 73 are separate members. By connecting the first member 71, the second member 72, and the power supply connection portion 73, one bus bar 70 is formed.
  • the first member 71 and the second member 72 are fixed to both sides in the circumferential direction of the power supply connection portion 73, respectively.
  • the first member 71, the second member 72, and the power supply connection portion 73 are fixed, for example, by welding.
  • a plurality of coil lead wires 36 are connected to the first member 71 and the second member 72, respectively.
  • the bus bar 70 is electrically connected to the coil lead wire 36.
  • the first coil lead-out wire 36 a and the second coil lead-out wire 36 b of the coil lead-out wires 36 are connected to the first member 71.
  • the first coil lead-out wire 36 c and the second coil lead-out wire 36 d of the coil lead-out wires 36 are connected to the second member 72.
  • the first coil lead wires 36a and 36c correspond to first conductive wires.
  • the second coil leads 36b and 36d correspond to a second conductive wire.
  • the first member 71 and the second member 72 have a plate shape whose plate surface is in the axial direction.
  • the first member 71 extends in the form of a broken line from the power supply connection portion 73 in the circumferential direction as viewed in the axial direction.
  • the second member 72 extends in the form of a broken line from the power supply connection portion 73 to the other side in the circumferential direction as viewed along the axial direction.
  • the first member 71 has a plurality of bent portions 71 c bent in a direction orthogonal to the axial direction. The bending directions of the adjacent bending portions 71c in the direction in which the first member 71 extends are opposite to each other.
  • the first member 71 extends in a zigzag manner as viewed in the axial direction.
  • the second member 72 has a plurality of bends 72c. That is, the bus bar 70 has bent portions 71c and 72c.
  • the second member 72 extends in a zigzag manner as viewed in the axial direction.
  • proximal side the side connected to the power supply connection portion 73
  • distal side the opposite side to the proximal side
  • the first member 71 has three first wide portions 74a, 74b, 74c and two first narrow portions 75a, 75b.
  • the first narrow portions 75a and 75b are connected to the first wide portions 74a, 74b and 74c in the direction in which the bus bar 70 extends.
  • the first narrow width portions 75a and 75b have smaller axial dimensions than the first wide portions 74a, 74b and 74c.
  • the axial dimensions of the first wide portions 74a, 74b, 74c are the same.
  • the axial dimensions of the first narrow portions 75a and 75b are the same.
  • the first wide portions 74a, 74b, 74c are arranged at the same position in the axial direction.
  • the first narrow portions 75a and 75b are disposed at the same position in the axial direction.
  • the three first wide portions 74a, 74b, 74c and the two first narrow portions 75a, 75b are alternately arranged along the direction in which the first member 71 extends.
  • the proximal end of the first wide portion 74 a is connected to the power supply connection portion 73.
  • the proximal end of the first wide portion 74 a is the proximal end of the first member 71.
  • the first wide portion 74a has two bent portions 71c.
  • the first wide portion 74a has a first coil connection portion 76a. That is, the bus bar 70 has the first coil connection portion 76 a.
  • the first coil connection portion 76a is connected to the first coil lead wire 36a.
  • the first coil connection portion 76a and the first coil lead wire 36a are fixed, for example, by welding.
  • the first coil connection portion 76a is a portion between the two bent portions 71c in the first wide portion 74a.
  • the first coil connection portion 76a has a rectangular plate shape. That is, the first coil connection portion 76a has a plate shape extending from the bending portion 71c. Therefore, the first coil connection portion 76a can be easily manufactured by bending the plate member. Further, it is easy to secure a space for welding the first coil lead wire 36a to the first coil connection portion 76a.
  • the first wide portion 74 a includes a portion of the bus bar 70 between the power supply connection portion 73 and the first coil connection portion 76 a.
  • the first narrow width portion 75a is connected to the end on the tip end side of the first wide portion 74a. More specifically, the first narrow width portion 75a is connected to the upper portion of the end portion on the tip end side of the first wide portion 74a. The upper end of the first narrow portion 75a is disposed at the same position in the axial direction as the upper end of the first wide portion 74a. The first narrow width portion 75a linearly extends in a direction parallel to the end on the tip side of the first wide portion 74a. The lower end of the first narrow portion 75a is disposed above the lower end of the first wide portions 74a and 74b.
  • the first wide portion 74 b is connected to the end on the tip side of the first narrow portion 75 a. More specifically, the upper portion of the proximal end of the first wide portion 74b is connected to the distal end of the first narrow portion 75a. Thus, the first wide portions 74a and 74b are respectively provided on both sides of the first narrow portion 75a in the direction in which the bus bar 70 extends.
  • the first wide portion 74 b has three bent portions 71 c. The proximal end of the first wide portion 74b extends in a direction parallel to the direction in which the first narrow portion 75a extends.
  • the first narrow width portion 75 b is connected to the end on the tip side of the first wide portion 74 b. More specifically, the first narrow width portion 75b is connected to the upper portion of the end on the tip side of the first wide portion 74b. The first narrow width portion 75b linearly extends in a direction parallel to the end on the tip end side of the first wide portion 74b. The lower end of the first narrow portion 75b is disposed above the lower end of the first wide portions 74b and 74c.
  • the first wide portion 74c is connected to the end on the tip side of the first narrow portion 75b. More specifically, the upper portion of the proximal end of the first wide portion 74c is connected to the distal end of the first narrow portion 75b. Thus, the first wide portions 74 b and 74 c are provided on both sides of the first narrow portion 75 b in the direction in which the bus bar 70 extends.
  • the first wide portion 74c has one bent portion 71c. The proximal end of the first wide portion 74c extends in a direction parallel to the direction in which the first narrow portion 75a extends.
  • the first wide portion 74c has a second coil connection portion 76b. That is, the bus bar 70 has the second coil connection portion 76b.
  • the second coil connection portion 76 b is connected to a second coil lead-out wire 36 b different from the first coil lead-out wire 36 a of the coil lead-out wire 36.
  • the second coil connection portion 76 b and the second coil lead wire 36 b are fixed by welding, for example.
  • the second coil connection portion 76b is a portion between the bent portion 71c of the first wide portion 74c and the end on the tip side.
  • the second coil connection portion 76b has a rectangular plate shape. That is, the second coil connection portion 76b has a plate shape extending from the bending portion 71c. Therefore, the second coil connection portion 76 b can be easily manufactured by bending the plate member. In addition, it is easy to secure a space for welding the second coil lead-out wire 36b to the second coil connection portion 76b.
  • the end on the tip end side of the second coil connection portion 76 b is the end on the tip end side of the first wide portion 74 c and is the end on the tip end side of the first member 71.
  • the second coil connection portion 76b is disposed closer to the tip than the first coil connection portion 76a. That is, the first coil connection portion 76 a is provided between the power supply connection portion 73 and the second coil connection portion 76 b in the bus bar 70.
  • Each of the first narrow portions 75a and 75b is disposed above the first wide portions 74a, 74b and 74c. That is, in the present embodiment, all of the plurality of first narrow portions 75a and 75b are disposed on the same side in the axial direction with respect to the first wide portions 74a, 74b and 74c. Therefore, for example, when the plurality of first narrow portions 75a and 75b are manufactured by punching out a part of the bus bar 70, the plurality of first narrow portions 75a and 75b can be easily manufactured.
  • the first narrow portions 75a and 75b are provided in the bus bar 70 between the first coil connection portion 76a and the second coil connection portion 76b.
  • the first recessed portion 71a recessed in the axial direction is configured by the first narrow width portion 75a and the two first wide portions 74a and 74b provided on both sides of the first narrow width portion 75a.
  • a first recessed portion 71b recessed in the axial direction is configured by the first narrow width portion 75b and the two first wide portions 74b and 74c provided on both sides of the first narrow width portion 75b. That is, the bus bar 70 has the first concave portions 71a and 71b.
  • the first recesses 71 a and 71 b are recessed upward from the lower end of the bus bar 70.
  • the shape of the inner portion of the first recess 71a is a polygonal shape as viewed in the direction perpendicular to the plate surface of the bus bar 70 in the first narrow width portion 75a.
  • the shape of the inner portion of the first recess 71a is a rectangular shape elongated in the direction in which the first narrow portion 75a extends, viewed along the direction orthogonal to the plate surface of the bus bar 70 in the first narrow portion 75a. It is.
  • the shape of the first recess 71 b is the same as the shape of the first recess 71 a.
  • the second member 72 is disposed at the same position as the first member 71 in the axial direction.
  • the second member 72 has three second wide portions 77a, 77b, 77c and two second narrow portions 78a, 78b.
  • the second narrow portions 78a and 78b are connected to the second wide portions 77a, 77b and 77c in the direction in which the bus bar 70 extends.
  • the second narrow width portions 78a and 78b have smaller axial dimensions than the second wide width portions 77a, 77b and 77c.
  • the dimensions in the axial direction of the respective second wide portions 77a, 77b, 77c are the same.
  • the axial dimensions of the second narrow portions 78a and 78b are the same.
  • the second wide portions 77a, 77b, 77c are arranged at the same position in the axial direction.
  • the second narrow portions 78a and 78b are disposed at the same position in the axial direction.
  • the three second wide portions 77a, 77b, 77c and the two second narrow portions 78a, 78b are alternately arranged along the direction in which the second member 72 extends.
  • the proximal end side of the second wide portion 77 a is connected to the power supply connection portion 73.
  • the proximal end of the second wide portion 77 a is the proximal end of the second member 72.
  • the second wide portion 77a has four bent portions 72c.
  • the second wide portion 77a has a first coil connection portion 79a.
  • the first coil connection portion 79a is a portion between two bent portions 72c of the bent portions 72c of the first wide portion 74a.
  • the first coil connection portion 79a has the same shape as the first coil connection portion 76a.
  • the first coil connection portion 79a is connected to the first coil lead-out wire 36c.
  • the second wide portion 77 a includes a portion of the bus bar 70 between the power supply connection portion 73 and the first coil connection portion 79 a.
  • the second narrow width portion 78a is connected to the end on the tip side of the second wide portion 77a.
  • the 2nd narrow part 78a is connected with the lower part among the end by the side of the tip of the 2nd wide part 77a.
  • the lower end of the second narrow portion 78a is disposed at the same position in the axial direction as the lower end of the second wide portion 77a.
  • the second narrow portion 78a has one bent portion 72c.
  • the second narrow width portion 78a is easy to bend because the axial dimension is relatively small. Therefore, the bent portion 72c can be easily manufactured.
  • the upper end of the second narrow portion 78a is disposed lower than the upper end of the second wide portions 77a and 77b.
  • the second wide portion 77 b is connected to the end on the tip side of the second narrow portion 78 a. More specifically, the lower portion of the proximal end of the second wide portion 77b is connected to the distal end of the second narrow portion 78a.
  • the second wide portions 77a and 77b are provided on both sides of the second narrow portion 78a in the direction in which the bus bar 70 extends.
  • the second wide portion 77 b has one bending portion 72 c.
  • the proximal end of the second wide portion 77 b extends in a direction parallel to the direction in which the distal end of the second narrow portion 78 a extends.
  • the second narrow portion 78b is connected to the end on the tip side of the second wide portion 77b.
  • the 2nd narrow part 78b is connected with the lower part among the end by the side of the tip of the 2nd wide part 77b.
  • the second narrow portion 78b has one bent portion 72c.
  • the second narrow width portion 78 b is easily bent because the axial dimension is relatively small. Therefore, the bent portion 72c can be easily manufactured.
  • the upper end of the second narrow portion 78b is disposed lower than the upper ends of the second wide portions 77b and 77c.
  • the second wide portion 77c is connected to the end on the tip side of the second narrow portion 78b. More specifically, the lower portion of the proximal end of the second wide portion 77c is connected to the distal end of the second narrow portion 78b.
  • the second wide portions 77 b and 77 c are provided on both sides of the second narrow portion 78 b in the direction in which the bus bar 70 extends.
  • the second wide portion 77c has one bent portion 72c.
  • the proximal end of the second wide portion 77 c extends in a direction parallel to the direction in which the distal end of the second narrow portion 78 a extends.
  • the second wide portion 77c has a second coil connection portion 79b.
  • the second coil connection portion 79b is a portion of the second wide portion 77c from the bent portion 72c to the end on the tip side.
  • the second coil connection portion 79b has the same shape as the second coil connection portion 76b.
  • the second coil connection portion 79b is connected to the second coil lead wire 36d.
  • the end on the tip end side of the second coil connection portion 79 b is the end on the tip end side of the second wide portion 77 c and is the end on the tip end side of the second member 72.
  • the second coil connection portion 79b is disposed closer to the tip than the first coil connection portion 79a. That is, the first coil connection portion 79 a is provided between the power supply connection portion 73 and the second coil connection portion 79 b in the bus bar 70.
  • Each of the second narrow portions 78a and 78b is disposed below the second wide portions 77a, 77b and 77c. That is, in the present embodiment, all of the plurality of second narrow portions 78a and 78b are disposed on the same side in the axial direction with respect to the second wide portions 77a, 77b and 77c. Therefore, for example, when the plurality of second narrow portions 78a and 78b are manufactured by punching out a part of the bus bar 70, the plurality of second narrow portions 78a and 78b can be easily manufactured.
  • the second narrow width portions 78a and 78b are provided in the bus bar 70 between the first coil connection portion 79a and the second coil connection portion 79b.
  • a second recessed portion 72a that is recessed in the axial direction is configured by the second narrow width portion 78a and the two second wide portions 77a and 77b provided on both sides of the second narrow width portion 78a.
  • a second recessed portion 72b that is recessed in the axial direction is configured by the second narrow width portion 78b and the two second wide portions 77b and 77c provided on both sides of the second narrow width portion 78b. That is, the bus bar 70 has the second recesses 72a and 72b.
  • the second recesses 72 a and 72 b are recessed downward from the upper end of the bus bar 70.
  • the shape of the inner portion of the second concave portion 72a is a polygonal shape when viewed along the direction in which the bent portion 72c of the second narrow portion 78a is convex.
  • the shape of the inner portion of the second recess 72a is a rectangular shape elongated in the direction in which the second narrow portion 78a extends, as viewed along the direction in which the bent portion 72c in the second narrow portion 78a becomes convex. is there.
  • the shape of the second recess 72b is the same as the shape of the second recess 72a.
  • the axial dimension H2 of the first narrow portions 75a, 75b is less than half the axial dimension H1 of the first wide portions 74a, 74b, 74c.
  • the axial dimension H4 of the second narrow portions 78a and 78b is less than half the axial dimension H3 of the second wide portions 77a, 77b and 77c.
  • the axial dimension H1 of the first wide portions 74a, 74b, 74c and the axial dimension H3 of the second wide portions 77a, 77b, 77c are the same.
  • the axial dimension H2 of the first narrow width portions 75a and 75b and the axial dimension H4 of the second narrow width portions 78a and 78b are the same.
  • An axial distance L1 from the lower end of the first narrow width portion 75a to the lower end of the first wide width portions 74a and 74b is larger than the axial dimension H2 of the first narrow width portion 75a. .
  • the sum of the distance L1 and the dimension H2 is equal to the axial dimension H1 of the first wide portions 74a and 74b.
  • the axial distance L2 from the upper end of the second narrow width portion 78a to the upper end of the second wide width portions 77a and 77b is larger than the axial dimension H4 of the second narrow width portion 78a.
  • the sum of the distance L2 and the dimension H4 is equal to the axial dimension H3 of the second wide portions 77a and 77b.
  • the power supply connection portion 73 includes a terminal portion 73 a and a fixing portion 73 b.
  • the terminal portion 73 a extends upward and is connected to the control device 80.
  • the power supply connection unit 73 is connected to the control device 80.
  • the fixing portion 73b is connected to the lower end of the terminal portion 73a.
  • the fixing portion 73 b has a plate shape extending in the axial direction.
  • the first wide portion 74 a and the second wide portion 77 a are fixed to the fixing portion 73 b.
  • the fixing portion 73b is sandwiched from both sides in the circumferential direction by the first wide portion 74a and the second wide portion 77a.
  • the bus bars 70 cross each other.
  • the first members 71 of one bus bar 70 straddle the upper sides of the second members 72 of the other two bus bars 70 and intersect with the two second members 72.
  • the second members 72 of one bus bar 70 straddle the first members 71 of the other two bus bars 70 on the upper side and intersect the two first members 71.
  • the bus bar 70A corresponds to the first bus bar
  • the bus bars 70B and 70C are the second bus bar It corresponds to
  • the first member 71 of the bus bar 70A straddles the upper side of the second member 72 of the bus bar 70B and the upper side of the second member 72 of the bus bar 70C.
  • a portion of the first member 71 of the bus bar 70A that straddles the upper side of the second member 72 of the bus bar 70B is a first narrow width portion 75a.
  • the first narrow width portion 75a of the bus bar 70A is disposed on the upper side of the second narrow width portion 78a of the bus bar 70B with a gap therebetween.
  • the first narrow-width portion 75a of the bus bar 70A, which is the first bus bar is disposed to face the upper side of the bus bar 70B, which is the second bus bar, via a gap.
  • the first width is obtained even if the bus bar 70A approaches the bus bar 70B from the upper side until the lower ends of the first wide portions 74a and 74b are lower than the upper end of the second member 72 in the bus bar 70B. It can suppress that narrow portion 75a contacts bus bar 70B. Thereby, a part of bus bar 70A and a part of bus bar 70B can be overlapped and arranged in the direction orthogonal to the axial direction. Therefore, even if the bus bar 70A and the bus bar 70B are overlapped in the axial direction and intersected with each other, it is possible to suppress an increase in the axial dimension at the intersection of the bus bars 70 with each other. Thereby, according to the present embodiment, the motor 10 having a structure in which the plate surface includes the plurality of plate-like bus bars 70 along the axial direction and can be miniaturized in the axial direction can be obtained.
  • overlapping of certain objects in a certain direction includes overlapping of certain objects when viewed along a certain direction. That is, overlapping of the bus bars 70 in the direction orthogonal to the axial direction includes that the bus bars 70 overlap when viewed along the direction orthogonal to the axial direction.
  • the first wide portions 74 a and 74 b of the bus bar 70 A are positioned below the upper end of the bus bar 70 B, that is, the upper end of the second member 72.
  • the upper end portions of the first wide portions 74a and 74b in the bus bar 70A and the upper end portions of the second wide portions 77a and 77b in the bus bar 70B are arranged at the same position in the axial direction. Therefore, the portion excluding the upper end of the first wide portions 74a and 74b of the bus bar 70A is a portion positioned lower than the upper end of the second member 72, and the upper end of the bus bar 70B It is a portion located below the side.
  • the first wide portions 74a and 74b are provided on both sides of the first narrow portion 75a, whereby the first recess 71a is provided. Therefore, by locally reducing the axial dimension of the portion of the bus bar 70A intersecting the bus bar 70B, the bus bar 70A and the bus bar 70B overlap in a direction orthogonal to the axial direction. The upper side can be straddled. As a result, it is possible to reduce the portion in which the axial dimension is reduced in the bus bar 70A, and to suppress the reduction in the strength of the bus bar 70A.
  • the shape of the inner portion of the first recess 71a is a polygonal shape as viewed in the direction orthogonal to the plate surface of the first narrow portion 75a. Therefore, for example, when producing the first concave portion 71a by punching by press processing, it is easy to punch a part of the bus bar 70A along the inner edge of the first concave portion 71a. Thereby, it is easy to produce the 1st crevice 71a.
  • the first wide portions 74a and 74b and the first narrow portion 75a can be produced by producing the first concave portion 71a. Therefore, the fabrication of the first wide portions 74a and 74b and the fabrication of the first narrow portion 75a can be facilitated.
  • the bus bar 70B which is the second bus bar includes the second narrow portion 78a.
  • the second narrow width portion 78a is disposed to face the lower side of the first narrow width portion 75a of the bus bar 70A, which is the first bus bar, with a gap therebetween. Therefore, the bus bar 70A and the bus bar 70B can be arranged closer to each other in the axial direction. As a result, the axial dimension at the intersection of the bus bars 70 can be further reduced, and the motor 10 can be further miniaturized.
  • the second wide portions 77a and 77b are provided on both sides of the second narrow portion 78a, whereby the second recess 72a is provided. Therefore, by locally reducing the axial dimension of the portion of the bus bar 70B intersecting the bus bar 70A, the bus bar 70B and the bus bar 70B overlap in the direction orthogonal to the axial direction, and the upper side of the bus bar 70B is 70A can be straddled. As a result, it is possible to reduce the portion in which the axial dimension is reduced in the bus bar 70B, and to suppress the reduction in the strength of the bus bar 70B.
  • the two bus bars 70A and 70B can be made to intersect by engaging the first concave portion 71a and the second concave portion 72a in each of the bus bars 70A and 70B. Therefore, the first concave portion 71a and the second concave portion 72a can be used as marks when arranging the bus bars 70 in combination, and the arrangement of the plurality of bus bars 70 can be performed accurately and easily.
  • the inner portion of the first recess 71a in the bus bar 70A and the inner portion of the second recess 72a in the bus bar 70B partially overlap each other.
  • the inner portion of the first recess 71b in the bus bar 70A and the inner portion of the second recess 72b in the bus bar 70C partially overlap each other.
  • an axial distance L1 from the lower end of the first narrow width portion 75a of the bus bar 70A to the lower side of the first wide portions 74a and 74b is the second width of the bus bar 70B. It is larger than the axial dimension H4 of the narrow portion 78a. Therefore, the whole of the second narrow width portion 78a in the axial direction can be accommodated in a recess formed by the first narrow width portion 75a being recessed upward with respect to the first wide width portions 74a and 74b. This makes it easier to reduce the axial dimension at the intersection of the bus bars 70 with each other. Therefore, the motor 10 can be further miniaturized.
  • the axial dimension H2 of the first narrow width portion 75a is less than half the axial dimension H1 of the first wide portions 74a and 74b.
  • the axial dimension H4 of the second narrow width portion 78a is less than half of the axial dimension H3 of the second wide portions 77a and 77b.
  • the axial dimension H1 of the first wide portions 74a and 74b and the axial dimension H3 of the second wide portions 77a and 77b are the same.
  • the bus bar 70A and the bus bar 70B in a state where the end portions on both sides in the axial direction of the first wide portions 74a and 74b and the end portions on both sides in the axial direction of the second wide portions 77a and 77b are aligned. Even if the first and second narrow portions 75a and 78a are provided in the axial direction, a gap is provided between the first narrow portion 75a and the second narrow portion 78a, and the first narrow portion 75a does not contact the second narrow portion 78a.
  • the axial dimension of the intersection of the two bus bars 70A and 70B superimposed in the axial direction is the axial dimension of the first wide portions 74a and 74b and the second wide portions 77a and 77b of one bus bar 70.
  • a portion straddling the upper side of the second member 72 of the bus bar 70C is a first narrow width portion 75b.
  • the first narrow width portion 75b of the bus bar 70A is disposed on the upper side of the second narrow width portion 78b of the bus bar 70C with a gap therebetween.
  • the first narrow-width portion 75b of the bus bar 70A which is the first bus bar, is disposed to face the upper side of the bus bar 70C, which is the second bus bar, with a gap therebetween.
  • an increase in axial dimension at the intersection of the bus bars 70 can be suppressed.
  • the bus bar 70A includes the plurality of first narrow portions 75a and 75b. Therefore, the bus bar 70A can be disposed in a state in which the plurality of bus bars 70 straddle the bus bar 70A.
  • the degree of freedom in arrangement of the bus bars 70 can be improved while suppressing increase in axial dimension at the intersections of the bus bars 70 with each other. Therefore, even if three or more bus bars 70 are provided, it is easy to miniaturize motor 10 in the axial direction.
  • bus bars 70B and 70C have a plurality of second narrow portions 78a and 78b. Therefore, the plurality of bus bars 70 can be straddled over the bus bars 70B and 70C. Thus, the freedom of arrangement of the bus bars 70 can be further improved while suppressing increase in axial dimension at the intersections between the bus bars 70. Therefore, even when three or more bus bars 70 are provided, the motor 10 can be easily miniaturized in the axial direction.
  • the second member 72 is straddled over the other two bus bars 70 while the other two bus bars 70 are straddled by the first member 71.
  • the dimensions in the axial direction at the intersections of the bus bars 70 can be made the same as the dimensions in the axial direction of one bus bar 70 while three bus bars 70A, 70B, 70C are superimposed in the axial direction. Therefore, when arranging the three bus bars 70A, 70B, 70C, it is possible to realize a preferable arrangement which can miniaturize the motor 10 in the axial direction.
  • the first wide portions 74a, 74b, 74c of the bus bar 70A are arranged at positions different from the bus bar 70B as viewed in the axial direction. Further, the second wide portions 77a, 77b, 77c of the bus bars 70B, 70C are arranged at positions different from the bus bar 70A as viewed in the axial direction. Therefore, the portion where the bus bars 70 intersect with each other can be only the narrow portions. Thus, the axial dimension at the intersection of the bus bars 70 can be suppressed from becoming large.
  • the bus bar 70B corresponds to a first bus bar
  • the bus bars 70A and 70C It corresponds to 2 bus bars.
  • the bus bar 70C corresponds to a first bus bar
  • the bus bars 70A and 70B are a second bus bar It corresponds to
  • control device 80 is disposed on the upper side of bus bar unit 90. Control device 80 is electrically connected to bus bar 70 via terminal portion 73a. Control device 80 is a power supply that supplies power to stator 30 via bus bar 70. Control device 80 has a substrate provided with an inverter circuit that controls the power supplied to stator 30.
  • the current flowing through the second member 72 flows in the order of the second wide portion 77a, the second narrow portion 78a, the second wide portion 77b, the second narrow portion 78b, and the second wide portion 77c.
  • the current flows from the first coil connection portion 79a to the first coil lead wire 36c by the current flowing to the second wide portion 77a, and the coil 35 connected to the first coil connection portion 76a and the second coil connection portion 76b.
  • the current is supplied to a coil 35 different from When current flows in the second wide portion 77c, current flows from the second coil connection portion 79b to the second coil lead wire 36d and is connected to the first coil connection portions 76a, 79a and the second coil connection portion 76b.
  • the current is supplied to a coil 35 different from the coil 35.
  • the maximum value of the amount of current that can flow through the bus bar 70 is determined by the cross-sectional area of the bus bar 70. That is, the smaller the cross-sectional area of bus bar 70, the smaller the maximum value of the amount of current that can flow through bus bar 70. Then, in the bus bar 70 having the same thickness, the cross-sectional area of each narrow portion is smaller than the cross-sectional area of each wide portion. Therefore, in each narrow width portion and each wide width portion, the maximum value of the amount of current which can flow in each narrow width portion is smaller than in each wide width portion. Therefore, depending on the arrangement of each narrow portion and each wide portion, it may be difficult to preferably flow the necessary amount of current.
  • the first coil connection portion 76 a is provided between the power supply connection portion 73 and the second coil connection portion 76 b in the bus bar 70, and the first wide portion 74 a is provided in the bus bar 70. A portion from the power supply connection portion 73 to the first coil connection portion 76a is included.
  • the first narrow width portions 75a and 75b are provided in the bus bar 70 between the first coil connection portion 76a and the second coil connection portion 76b. Therefore, a portion of the current flowing through the first wide portion 74a flows from the first coil connection portion 76a to the first coil lead wire 36a, and the remaining portion flows to the first narrow portions 75a and 75b.
  • the amount of current flowing through the first narrow portions 75a and 75b is smaller than the amount of current flowing through the first wide portion 74a. Therefore, even if the first narrow portions 75a and 75b are provided, the necessary amount of current can be suitably supplied to the coil lead wires 36. The same applies to the current flowing through the second member 72.
  • the current flowing from the power supply connection portion 73 to the first wide portion 74a is connected to the current flowing to the first coil lead wire 36a connected to the first coil connection portion 76a and to the second coil connection portion 76b And a current flowing through the second coil lead wire 36b.
  • the current flowing to the tip end side of the first narrow width portion 75a and the first narrow width portion 75a includes only the current flowing to the second coil lead wire 36b. The same applies to the current flowing through the second member 72.
  • the first narrow width portion 175 a is the upper side at the end on the tip end side of the first wide portion 74 a. It extends from the portion to the tip end of the first member 171. That is, the end on the tip end side of the first narrow portion 175 a is the end on the tip end side of the first member 171.
  • the first narrow width portion 175a is arranged to be recessed upward with respect to the first wide portion 74a. Thus, in the present modification, the first recess is not provided.
  • the portions on the tip side of the first wide portion 74a are the first narrow portions 175a, the portions on the tip side of the first wide portion 74a may be located at any position. , And the other bus bars 170 can be straddled. Therefore, the degree of freedom in arranging the bus bars 170 can be improved.
  • it is possible to increase the number of portions in which the axial dimension is reduced it is possible to reduce the material required to manufacture the bus bar 170 and to reduce the manufacturing cost of the bus bar 170.
  • punching out a board member and producing bus bar 170 the number of removal from one board member can be easily increased, and the yield of bus bar 170 can be improved.
  • the shape of the first member 171 of this modification is, for example, the dimension in the axial direction of the first wide portions 74b and 74c disposed on the tip end side of the first narrow portion 75a in the first member 71 shown in FIG. Is the same as the axial dimension of the first narrow portions 75a, 75b.
  • the upper end of the first narrow portion 275a is the upper end of the first wide portions 74a and 74b. It is arranged below the part.
  • the lower end of the first narrow portion 275a is disposed above the lower end of the first wide portions 74a and 74b. That is, the first narrow width portion 275a is arranged to be recessed upward and downward with respect to the first wide portions 74a and 74b.
  • the first concave portions 271a are respectively provided on both sides in the axial direction of the first narrow width portion 275a.
  • the first narrow width portion 275a can be removed from the bus bar 270B in a state where the bus bar 270A and the bus bar 270B overlap in the direction orthogonal to the axial direction. In the state in which the bus bar 270A and the bus bar 270C overlap in the direction orthogonal to the axial direction, the bus bar 270C can be straddled above the first narrow width portion 275a.
  • the axial dimension at the intersection where the three bus bars 270A, 270B, and 270C overlap can be reduced while the three bus bars 270A, 270B, and 270C are disposed so as to overlap in the axial direction. Therefore, even when the number of bus bars 270 is relatively large, motor 210 can be miniaturized in the axial direction.
  • the upper end of the second narrow portion 278a is disposed lower than the upper end of the second wide portions 77a and 77b.
  • the upper end of the second narrow portion 278a may have the same axial position as the upper end of the second wide portions 77a and 77b.
  • the lower end of the second narrow portion 278a is disposed above the lower end of the second wide portions 77a and 77b. That is, the second narrow width portion 278a is arranged to be recessed upward and downward with respect to the second wide width portions 77a and 77b.
  • the second recesses 272a are respectively provided on both axial sides of the second narrow portion 278a. Therefore, by meshing the first recess 271a and the second recess 272a, the axial dimension at the intersection of the bus bars 270A, 270B, and 270C can be further reduced.
  • the present invention is not limited to the above-described embodiment, and the following other configurations can be adopted.
  • the number of bus bars is not particularly limited as long as at least two bus bars of the first bus bar and the second bus bar are provided. If at least one of the bus bars has at least one first narrow width portion and a first wide width portion, the number of first narrow width portions, the number of second narrow width portions, the number of first wide width portions, The number of the second wide portions is not particularly limited.
  • a bus bar without each narrow portion and each wide portion may be provided.
  • the shape of the bus bar is particularly It is not limited.
  • the first narrow portion may have a bend.
  • the first narrow width portion is easily bent since the axial dimension is relatively small. Therefore, it is easy to produce a bent portion.
  • the bus bar may have a shape without a bent portion.
  • the shape of the inner portion of the first recess may be a polygonal shape other than a rectangular shape or a semicircular shape as viewed along a direction orthogonal to the plate surface of the bus bar in the first narrow width portion. Good. Also in this configuration, in the case of producing the first recess by punching by press processing, it is easy to produce the first recess. As polygonal shapes other than rectangular shape, triangular shape, trapezoidal shape, etc. are mentioned, for example. The same applies to the shape of the inner portion of the second recess.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

Dans un aspect, l'invention concerne un moteur comprenant : un rotor pourvu d'un arbre disposé le long d'un axe central; un stator comportant une pluralité de bobines et faisant face radialement au rotor, un espace étant formé entre eux; ainsi qu'une pluralité de barres omnibus raccordées électriquement à des fils conducteurs s'étendant à partir des bobines. Les barres omnibus présentent une forme de plaque comportant une surface de plaque dans le sen axial et s'étendent le long d'un plan perpendiculaire au sens axial. La pluralité de barres omnibus comprend une première barre omnibus et une deuxième barre omnibus. La première barre omnibus comporte une première partie de grande largeur et une première partie de petite largeur reliée à la première partie de grande largeur dans le sens d'extension de la première barre omnibus et présentant une dimension axiale inférieure à la première partie de grande largeur. Une partie extrémité d'un côté de la première partie de petite largeur dans le sens axial est disposée plus près de l'autre côté dans le sens axial qu'une partie extrémité du côté de la première partie de grande largeur dans le sens axial. La première partie de petite largeur est disposée face à l'autre côté de la deuxième barre omnibus dans le sens axial, un espace étant formé entre elles.
PCT/JP2018/034807 2017-09-28 2018-09-20 Moteur WO2019065449A1 (fr)

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FR3079368B1 (fr) * 2018-03-23 2020-05-08 Valeo Equipements Electriques Moteur Dispositif de connexion electrique pour machine electrique tournante

Citations (4)

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Publication number Priority date Publication date Assignee Title
JP2008312277A (ja) * 2007-06-12 2008-12-25 Fuji Heavy Ind Ltd 電動機
JP2012031808A (ja) * 2010-08-02 2012-02-16 Denso Corp 燃料ポンプ
JP2013102596A (ja) * 2011-11-08 2013-05-23 Mitsuba Corp バスバーユニットおよびブラシレスモータ
WO2015060058A1 (fr) * 2013-10-21 2015-04-30 日本電産株式会社 Unité de barres omnibus et moteur associé

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JP2008259259A (ja) * 2007-04-02 2008-10-23 Nippon Densan Corp バスバーユニット
CN102027657B (zh) * 2008-05-16 2013-10-16 三菱电机株式会社 旋转电机
KR101754421B1 (ko) * 2010-08-19 2017-07-05 현대모비스 주식회사 차량 구동모터의 터미널유닛
EP2458715B1 (fr) * 2010-11-05 2014-01-08 LG Innotek Co., Ltd. Barre omnibus de moteur EPS
JP5991172B2 (ja) * 2012-06-07 2016-09-14 日立金属株式会社 電動機の製造方法
JP6225975B2 (ja) * 2014-11-10 2017-11-08 デンソートリム株式会社 内燃機関用回転電機

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
JP2008312277A (ja) * 2007-06-12 2008-12-25 Fuji Heavy Ind Ltd 電動機
JP2012031808A (ja) * 2010-08-02 2012-02-16 Denso Corp 燃料ポンプ
JP2013102596A (ja) * 2011-11-08 2013-05-23 Mitsuba Corp バスバーユニットおよびブラシレスモータ
WO2015060058A1 (fr) * 2013-10-21 2015-04-30 日本電産株式会社 Unité de barres omnibus et moteur associé

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