WO2017026413A1 - モータ - Google Patents
モータ Download PDFInfo
- Publication number
- WO2017026413A1 WO2017026413A1 PCT/JP2016/073187 JP2016073187W WO2017026413A1 WO 2017026413 A1 WO2017026413 A1 WO 2017026413A1 JP 2016073187 W JP2016073187 W JP 2016073187W WO 2017026413 A1 WO2017026413 A1 WO 2017026413A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bus bar
- main body
- holder
- recess
- motor according
- Prior art date
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Classifications
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- 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
- H02K3/505—Fastening of winding heads, equalising connectors, or connections thereto for large machine windings, e.g. bar windings
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- 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
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/38—Windings characterised by the shape, form or construction of the insulation around winding heads, equalising connectors, or connections thereto
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
- H02K2203/09—Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
- H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
Definitions
- the present invention relates to a motor.
- a motor having a plurality of bus bars is known.
- the plurality of bus bars are inserted into annular grooves formed concentrically on the insulating holding member at predetermined intervals.
- One aspect of the present invention is to provide a motor having a structure capable of ensuring insulation between a plurality of bus bars while suppressing an increase in size in the axial direction in view of the above problems. .
- a motor includes a shaft disposed along a central axis extending in the up-down direction, a rotor assembly attached to the shaft, a stator facing the rotor assembly in a radial direction via a gap, A plurality of bus bars electrically connected to the stator, wherein the bus bar includes a first bus bar and a second bus bar, and the first bus bar is disposed on an upper side of the second bus bar. It has an upper arrangement part, and the second bus bar has a bus bar recess that is recessed downward at a position overlapping the upper arrangement part in the axial direction.
- FIG. 1 is a cross-sectional view showing the motor of this embodiment.
- FIG. 2 is a plan view showing the lower bus bar assembly according to the present embodiment.
- FIG. 3 is a perspective view showing a part of the lower bus bar assembly according to the present embodiment.
- FIG. 4 is a cross-sectional view showing a part of the lower bus bar assembly of the present embodiment.
- FIG. 5 is a cross-sectional view showing a part of a lower bus bar assembly which is another example of the present embodiment.
- FIG. 6 is a cross-sectional view showing a part of a lower bus bar assembly that is another example of the present embodiment.
- FIG. 1 in the axial direction of the central axis J extending in the vertical direction is simply referred to as “upper side”, and the lower side is simply referred to as “lower side”.
- the vertical direction does not indicate the positional relationship or direction when incorporated in an actual device.
- a direction parallel to the central axis J is referred to as an “axial direction”
- a radial direction around the central axis J is simply referred to as a “radial direction”
- a circumferential direction around the central axis J is simply referred to as a “circumferential direction”.
- extending in the axial direction includes not only strictly extending in the axial direction but also extending in a direction inclined by less than 45 ° with respect to the axial direction.
- “extending in the radial direction” means strictly in the radial direction, that is, extending in a direction perpendicular to the axial direction, and incline in a range of less than 45 ° with respect to the radial direction. Including cases extending in the direction.
- the motor 10 is an inner rotor type motor.
- the motor 10 includes a housing 20, a rotor 30, a cylindrical stator 40, a bearing holder 50, a lower bearing 60 held by the housing 20, an upper bearing 61 held by the bearing holder 50, and a lower bus bar.
- An assembly 70, an upper bus bar assembly 80, and terminals 92A and 92B are provided.
- the housing 20 can accommodate each component therein. *
- the rotor 30 includes a shaft 31, a first rotor core 33A, a second rotor core 33B, a third rotor core 33C, a first magnet 34A, a second magnet 34B, and a third magnet disposed along the central axis J. 34C.
- the shaft 31 is rotatably supported around the central axis J by the lower bearing 60 and the upper bearing 61.
- the rotor 30 is rotatable with respect to the stator 40 on the radially inner side of the stator 40. In other words, the stator 40 surrounds the rotor 30.
- the first rotor core 33A, the second rotor core 33B, and the third rotor core 33C are cylindrical.
- the first rotor core 33A, the second rotor core 33B, and the third rotor core 33C are arranged in this order from the lower side to the upper side in the axial direction.
- the inner surface of the first rotor core 33A, the inner surface of the second rotor core 33B, and the inner surface of the third rotor core 33C are cylindrical with the central axis J as the center.
- the shaft 31 is fixed by being fitted to the first rotor core 33A, the second rotor core 33B, and the third rotor core 33C, for example, by press fitting.
- the shaft 31 may be indirectly fixed to the first rotor core 33A, the second rotor core 33B, and the third rotor core 33C via another member.
- the first magnet 34A, the second magnet 34B, and the third magnet 34C are plate-shaped extending in the circumferential direction.
- the first magnet 34A is fixed to the outer surface of the first rotor core 33A.
- the second magnet 34B is fixed to the outer surface of the second rotor core 33B.
- the third magnet 34C is fixed to the outer surface of the third rotor core 33C.
- a plurality of first magnets 34A, second magnets 34B, and third magnets 34C are provided along the circumferential direction.
- the first magnet 34A, the second magnet 34B, and the third magnet 34C may each be a single member.
- the first magnet 34A, the second magnet 34B, and the third magnet 34C are, for example, annular.
- the stator 40 is opposed to the rotor 30 in the radial direction via a gap.
- the stator 40 is disposed on the radially outer side of the rotor 30.
- the stator 40 includes a stator core 40a, a plurality of coils 43, and a plurality of insulators 44.
- the stator core 40a is configured by stacking a plurality of electromagnetic steel plates, for example.
- the stator core 40 a includes an annular core back 41 that extends in the circumferential direction, and a plurality of teeth 42 that extend from the core back 41 in the radial direction. That is, the stator 40 includes a core back 41 and teeth 42.
- the core back 41 has an annular shape around the central axis J.
- the outer peripheral surface of the core back 41 is fixed to the inner peripheral surface of the housing 20 by, for example, press fitting.
- the plurality of teeth 42 extend radially inward from the inner surface of the core back 41.
- the plurality of teeth 42 are arranged at equal intervals along the circumferential direction.
- the coil 43 is composed of a conductive wire 43 a wound around the tooth 42 via an insulator 44.
- the coil 43 is disposed on each tooth 42.
- the coil 43 has a coil end 43b which is an end of the conductive wire 43a.
- the coil end 43 b extends upward from a portion of the coil 43 wound around the tooth 42.
- At least a part of the insulator 44 is disposed between the tooth 42 and the coil 43.
- the insulator 44 covers at least a part of the tooth 42. *
- the lower bus bar assembly 70 is substantially cylindrical.
- the lower bus bar assembly 70 is disposed on the upper side of the stator 40.
- the lower bus bar assembly 70 includes a neutral point bus bar 90 and a substantially cylindrical lower bus bar holder 71 that holds the neutral point bus bar 90. That is, the motor 10 includes a neutral point bus bar 90 and a lower bus bar holder 71.
- the lower bus bar holder 71 is made of an insulating resin.
- the lower bus bar holder 71 is fixed to the insulator 44.
- the neutral point bus bar 90 is electrically connected to the coil 43. More specifically, the neutral point bus bar 90 is connected to the coil end 43b. Thereby, the neutral point bus bar 90 is electrically connected to the stator 40.
- the neutral point bus bar 90 connects a plurality of coil ends 43b as neutral points. *
- the upper bus bar assembly 80 is substantially cylindrical.
- the upper bus bar assembly 80 is disposed above the lower bus bar assembly 70.
- the upper bus bar assembly 80 includes a phase bus bar 91 and an upper bus bar holder 81 that holds the phase bus bar 91. That is, the motor 10 includes a phase bus bar 91 and an upper bus bar holder 81.
- the upper bus bar holder 81 is substantially cylindrical. In the present embodiment, the upper bus bar holder 81 is made of an insulating resin. The upper bus bar holder 81 is fixed to the housing 20.
- the phase bus bar 91 is electrically connected to the coil 43. More specifically, the phase bus bar 91 is connected to the coil end 43b. The phase bus bar 91 is connected to the terminals 92A and 92B. Thereby, the phase bus bar 91 is electrically connected to the stator 40.
- the terminals 92A and 92B are plate-like members extending upward.
- the upper ends of the terminals 92 ⁇ / b> A and 92 ⁇ / b> B are disposed above the upper end of the housing 20.
- Terminals 92A and 92B are connected to an external power source (not shown). *
- the lower bus bar holder 71 includes a first coil support 72, a lower holder tube portion 73, an inner peripheral wall portion 74, and an outer peripheral wall portion 75.
- the first coil support 72 has a substantially annular plate shape centered on the central axis J.
- the first coil support 72 is located above the coil 43.
- the 1st coil support 72 has the 1st support part 72a which supports coil end 43b. Therefore, the conductive wire 43a of the coil 43 can be easily wound around while ensuring insulation.
- the first support portion 72 a is a recess that is recessed radially outward from the inner edge of the first coil support 72.
- the coil end 43b is passed through the first support portion 72a.
- the coil end 43b passing through the inside of the first support portion 72a is supported from both sides in the circumferential direction by the inner surface of the first support portion 72a.
- the lower holder cylinder portion 73 has a cylindrical shape centered on the central axis J.
- the lower holder cylinder portion 73 extends upward from the first coil support 72.
- the inner peripheral wall portion 74 and the outer peripheral wall portion 75 are substantially annular extending in the circumferential direction.
- the inner peripheral wall portion 74 is located radially inward of the lower holder tube portion 73 and extends upward from the first coil support 72.
- the outer peripheral wall portion 75 is located on the radially outer side of the lower holder tube portion 73 and extends upward from the first coil support 72.
- the lower bus bar holder 71 has a first lower groove 71a and a second lower groove 71b that are recessed downward and extend in the circumferential direction.
- the first lower groove 71 a is located between the lower holder cylinder 73 and the inner peripheral wall 74 in the radial direction.
- the second lower groove 71b is located between the lower holder cylinder 73 and the outer peripheral wall 75 in the radial direction.
- Neutral point bus bar 90 includes a first bus bar 90A and a second bus bar 90B.
- 90 A of 1st bus bars have 1st bus-bar main-body part 90Aa extended in the circumferential direction, and 1st connecting terminal part 98A extended in radial direction from 1st bus-bar main-body part 90Aa.
- the first bus bar main body 90Aa is substantially annular in plan view.
- the first bus bar main body 90Aa is disposed in the first lower groove 71a.
- the first bus bar main body 90Aa is fitted into the first lower groove 71a.
- the first connection terminal portion 98A extends radially outward from the first bus bar main body 90Aa.
- the first bus bar 90A has nine first connection terminal portions 98A.
- the first connection terminal portions 98A are arranged at substantially equal intervals along the circumferential direction.
- the first connection terminal portion 98A includes a first extension portion 96A and a first connection portion 97A. That is, the first bus bar 90A includes a first extension part 96A and a first connection part 97A.
- 96 A of 1st extension parts are extended from radial direction from 1st bus-bar main-body part 90Aa.
- 97 A of 1st connection parts are arrange
- the shape of the first connecting portion 97A is U-shaped. Therefore, when the lower bus bar assembly 70 is disposed on the upper side of the stator 40, the coil end 43b can be held by the first connecting portion 97A. Thereby, 97 A of 1st connection parts and the coil end 43b can be connected easily.
- 97 A of 1st connection parts are U-shape opened to the lower side. Therefore, when the lower bus bar assembly 70 is disposed on the upper side of the stator 40, the coil end 43b can be easily grasped by the first connecting portion 97A. More specifically, when the lower bus bar assembly 70 is arranged on the upper side of the stator 40, a winding wire 45g described later can be easily grasped by the first connecting portion 97A. Thereby, 97 A of 1st connection parts can be easily arrange
- the second bus bar 90 ⁇ / b> B includes a second bus bar main body 90 ⁇ / b> Ba extending in the circumferential direction and a second connection terminal 98 ⁇ / b> B extending in the radial direction from the second bus bar main body 90 ⁇ / b> Ba.
- 2nd bus-bar main-body part 90Ba is substantially cyclic
- the second bus bar main body 90Ba is disposed in the second lower groove 71b.
- the second bus bar main body 90Ba is fitted into the second lower groove 71b. *
- the first bus bar main body 90Aa and the second bus bar main body 90Ba are in the same position in the axial direction.
- the first bus bar main body 90Aa and the second bus bar main body 90Ba overlap in the radial direction.
- the second connection terminal portion 98B extends radially outward from the second bus bar main body portion 90Ba.
- the second bus bar 90B has nine second connection terminal portions 98B.
- the second connection terminal portions 98B are arranged at substantially equal intervals along the circumferential direction.
- the second connection terminal portion 98B includes a second extension portion 96B and a second connection portion 97B. That is, the second bus bar 90B has a second extending portion 96B and a second connecting portion 97B.
- the second extending portion 96B extends in the radial direction from the second bus bar main body portion 90Ba.
- the second connecting portion 97B is disposed at the radial end of the second extending portion 96B and is connected to the coil end 43b.
- the shape of the second connection portion 97B is the same as the shape of the first connection portion 97A.
- the first connection portion 97A and the second connection portion 97B are at the same position in the axial direction. Therefore, the position of the axial direction which connects each connection part and the coil end 43b can be made the same. Thereby, at the time of manufacture of motor 10, connection work of the 1st bus bar 90A and the 2nd bus bar 90B, and coil end 43b can be performed easily.
- the first bus bar 90A has an upper arrangement portion 99 arranged on the upper side of the second bus bar 90B.
- the upper placement portion 99 is a part of the first connection terminal portion 98Aa. More specifically, the upper arrangement portion 99 is a part of the first extension portion 96A.
- the first connecting portion 97A connected to the coil end 43b can be easily disposed at a position that does not overlap the second bus bar 90B in the axial direction. Thereby, 97 A of 1st connection parts and the coil end 43b can be connected easily. Further, the first connection portion 97A and the second connection portion 97B can be easily arranged at the same position in the radial direction, and the connection work between each connection portion and the coil end 43b can be efficiently performed. . *
- the second bus bar 90B has a bus bar recess 90Bb that is recessed downward at a position overlapping the upper arrangement portion 99 in the axial direction. Therefore, even if the axial position of the upper arrangement portion 99 is arranged close to the second bus bar 90B, the insulation distance between the first bus bar 90A and the second bus bar 90B can be secured by the bus bar recess 90Bb. Thereby, the motor 10 becomes long in the axial direction, and insulation between a plurality of bus bars can be ensured while suppressing the motor 10 from becoming large. *
- the bus bar recess 90Bb is disposed in the second bus bar main body 90Ba.
- the upper placement portion 99 is a part of the first connection terminal portion 98Aa. Therefore, for example, the first bus bar main body 90Aa and the second bus bar main body 90Ba are arranged at the same position in the axial direction. In such a case, even if the axial position of the first connection terminal portion 98Aa is substantially the same as the position of the first bus bar main body portion 90Aa, the first connection terminal portion 98Aa and the second bus bar main body portion 90Ba are separated by the bus bar concave portion 90Bb. An insulation distance between the two can be secured. Thereby, the insulation between several bus-bars is securable, suppressing further that the motor 10 becomes long in the axial direction and the motor 10 enlarges. *
- the shape viewed in the radial direction inside the bus bar recess 90Bb is a trapezoid whose upper base is longer than the lower base.
- the shape viewed in the radial direction inside the bus bar recess 90Bb is not particularly limited, and may be, for example, a semicircular shape, a semi-elliptical shape, or a polygonal shape.
- the bus bar recess 90Bb opens on both radial sides of the second bus bar body 90Ba. *
- the second bus bar main body 90Ba has a bus bar protrusion 90Bc protruding downward at a position overlapping the bus bar recess 90Bb in the axial direction. Therefore, the dimension in the axial direction of the portion where the bus bar recess 90Bb is disposed in the second bus bar main body 90Ba, the dimension in the axial direction of the portion disposed on both sides in the circumferential direction of the bus bar recess 90Bb in the second bus bar main body 90Ba, Can be the same. *
- the portion where the bus bar recess 90Bb is disposed is orthogonal to the circumferential direction of the second bus bar body 90Ba.
- the area of the cross section is partially reduced.
- the electrical resistance of the second bus bar main body 90Ba is partially increased. Therefore, more heat is generated in the portion where the bus bar recess 90Bb is disposed, and the portion where the bus bar recess 90Bb is disposed in the second bus bar main body 90Ba may become high temperature.
- the axial dimension of the portion where the bus bar concave portion 90Bb is disposed is the same as or close to the portion disposed on both sides in the circumferential direction of the bus bar concave portion 90Bb. It can suppress that the area of the cross section orthogonal to a direction becomes small partially. Therefore, it can suppress that the part in which 2nd bus-bar main-body part 90Ba arrange
- the shape of the bus bar protrusion 90 ⁇ / b> Bc viewed in the radial direction is a trapezoid whose upper base is longer than the lower base.
- the shape of the bus bar protrusion 90Bc viewed in the radial direction is not particularly limited, and may be, for example, a semicircular shape, a semi-elliptical shape, or a polygonal shape.
- the shape of the bus bar convex portion 90Bc viewed in the radial direction is, for example, the same as the shape viewed in the radial direction inside the bus bar concave portion 90Bb. *
- the dimension in the axial direction of the bus bar protrusion 90Bc is the same as the dimension in the axial direction in the portion of the bus bar recess 90Bb overlapping in the axial direction. Therefore, by uniformizing the radial dimension of the second bus bar main body 90Ba, the area of the cross section perpendicular to the circumferential direction of the second bus bar main body 90Ba in the part where the bus bar concave part 90Bb is arranged is different from that of the other part. The area of the cross section can be the same.
- the area of the cross section perpendicular to the circumferential direction of the second bus bar main body 90Ba is uniform in the portion where the bus bar recess 90Bb is located and the portions located on both sides in the circumferential direction of the bus bar recess 90Bb. Thereby, it is possible to prevent a part of the heat generation amount of the second bus bar main body 90Ba from partially increasing and a part of the second bus bar main body 90Ba from becoming high temperature.
- the upper arrangement portion 99 is arranged above the bus bar recess 90Bb.
- the insulation distance between the upper arrangement portion 99 and the second bus bar body 90Ba may be shortened.
- positioning part 99 is arrange
- the bus bar concave portion having a width necessary for the first extending portion 96A to pass over the second bus bar main body portion 90Ba is provided.
- the ratio of the area in which the bus bar recesses are arranged in the second bus bar main body 90Ba is increased. Therefore, for example, the manufacturing process of the second bus bar main body 90Ba may be complicated due to difficulty in making the area of the cross section orthogonal to the circumferential direction of the second bus bar main body 90Ba uniform.
- the portion where the bus bar recess 90Bb is arranged in the second bus bar main body 90Ba is curved. Therefore, the area in which the bus bar recess 90Bb in the second bus bar main body 90Ba is disposed can be made smaller than the portion where the bus bar recess 90Bb in the second bus bar main body 90Ba is bent at an acute angle. Thereby, manufacture of 2nd bus-bar main-body part 90Ba becomes easy.
- the lower bus bar holder 71 has a holder recess 77 that is recessed downward. At least a part of the bus bar protrusion 90 ⁇ / b> Bc is disposed in the holder recess 77. Therefore, even if bus bar convex part 90Bc is provided, it can suppress that the dimension of the axial direction of the lower bus-bar assembly 70 increases.
- the entire bus bar protrusion 90 ⁇ / b> Bc is disposed in the holder recess 77. Therefore, it can suppress more that the lower side bus-bar assembly 70 becomes long in an axial direction.
- the inner shape of the holder recess 77 is the same as the shape of the bus bar protrusion 90Bc.
- the entire bus bar protrusion 90Bc is fitted into the holder recess 77. *
- the lower bus bar holder 71 has a holder protrusion 76 protruding downward at a position overlapping the holder recess 77 in the axial direction. Therefore, the axial dimension can be increased in the portion of the lower bus bar holder 71 that is disposed below the bus bar convex portion 90Bc. Thereby, it is easy to insulate the bus bar protrusion 90Bc.
- the shape of the holder protrusion 76 viewed in the radial direction is a rectangular shape. *
- the lower holder cylinder 73 has a cylinder recess 73 a that is recessed downward. As shown in FIGS. 3 and 4, a part of the first extending portion 96 ⁇ / b> A is disposed in the cylindrical portion recess 73 a. As shown in FIG. 3, the outer peripheral wall 75 includes a first peripheral wall recess 75 a and a second peripheral wall recess 75 b that are recessed downward. A part of the first extending portion 96A is disposed in the first peripheral wall concave portion 75a. A part of the second extension 96B is disposed in the second peripheral wall recess 75b. *
- the second extension 96B extends from the second bus bar main body 90Ba to the outer side in the radial direction than the outer peripheral wall 75 via the second peripheral wall recess 75b. Therefore, it is not necessary for the second extending portion 96B to extend greatly above the position of the second bus bar main body 90Ba in the axial direction, and the lower bus bar assembly 70 can be further shortened in the axial direction. 70 can be reduced in size.
- the entire lower bus bar assembly is attached to the stator 40. There is a way to get closer.
- the coil 43 is disposed below the lower bus bar holder 71. Therefore, when the axial distance between the lower bus bar assembly 70 and the stator 40 is reduced, there is a problem that the coil end 43b of the coil 43 is difficult to scoop.
- the bus bar recess 90Bb since the bus bar recess 90Bb is provided, it is possible to secure an insulation distance between the upper arrangement portion 99 and the second bus bar main body 90Ba without extending the upper arrangement portion 99 upward. As a result, it is possible to prevent the motor 10 from becoming longer in the axial direction and the motor 10 from becoming larger without bringing the lower bus bar assembly 70 closer to the stator 40. Thereby, the axial distance between the lower bus bar assembly 70 and the stator 40 can be appropriately maintained, and the coil end 43b can be easily wound.
- the holder convex portion 76 may be partially provided only at the position where the upper arrangement portion 99 is arranged. Therefore, at the time of assembling the motor 10, it is difficult to disturb the coil end 43b.
- the lower bus bar assembly 70 may be configured as shown in FIGS. 5 and 6, for example. As shown in FIG. 5, a part of the upper placement portion 199 is placed in the bus bar recess 90Bb. Therefore, the upper placement portion 199 can be brought closer to the second bus bar main body portion 90Ba. Thereby, the lower bus bar assembly 170 can be shortened in the axial direction, and the lower bus bar assembly 170 can be reduced. Therefore, the axial dimension of the motor 10 can be shortened, and the motor 10 can be miniaturized. *
- the upper arrangement portion 199 may be arranged in the bus bar recess 90Bb.
- the entire upper placement portion 199 may be placed in the bus bar recess 90Bb.
- the lower bus bar assembly 170 can be shortened in the axial direction, and the entire lower bus bar assembly 170 can be reduced in size. Therefore, the motor 10 can be further downsized in the axial direction.
- the lower bus bar holder 271 has a holder through-hole 277 that passes through the lower bus bar holder 271 in the axial direction. At least a part of the bus bar protrusion 90Bc is disposed in the holder through hole 277. Therefore, even if bus bar convex part 90Bc is provided, it can suppress that the lower side bus bar assembly 270 becomes large in an axial direction. Moreover, since the holder convex part 76 is not provided, the dimension of the lower bus-bar assembly 270 becomes long in an axial direction, and it can suppress that the lower bus-bar assembly 270 enlarges. *
- the entire bus bar protrusion 90Bc is disposed in the holder through hole 277.
- the lower end of the bus bar convex portion 90 ⁇ / b> Bc is disposed above the lower end of the first coil support 272. Therefore, even if the bus bar concave portion 90Bb and the bus bar convex portion 90Bc are provided, the lower bus bar assembly 270 does not lengthen in the axial direction and does not increase in size, and between the first bus bar 90A and the second bus bar 90B. Insulation can be secured.
- the holder through hole 277 is disposed in the first coil support 272. That is, the holder through hole 277 is a hole that penetrates the first coil support 272 in the axial direction.
- the shape viewed in the radial direction inside the holder through-hole 277 is substantially the same shape as the bus bar protrusion 90Bc.
- the upper arrangement portion 99 may be the entire first connection terminal portion 98Aa. That is, the upper arrangement portion 99 may be at least a part of the first connection terminal portion 98Aa. Further, the upper arrangement portion 99 may be the entire first extending portion 96A. That is, the upper arrangement portion 99 may be at least a part of the first extension portion 96A.
- the dimension of radial direction may become large in the part by which bus-bar recessed part 90Bb is arrange
- the area of the cross section orthogonal to the circumferential direction of the second bus bar main body 90Ba is uniform in the portion where the bus bar recess 90Bb is disposed and the portion disposed on both sides in the circumferential direction of the bus bar recess 90Bb Good.
- the number of rotor cores in the rotor 30 may be one.
- the motor 10 may be, for example, an outer rotor type motor. *
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Windings For Motors And Generators (AREA)
Abstract
Description
端子部98Aは、周方向に沿ってほぼ等間隔に並ぶ。
シー全体をステータ40に近づける方法がある。しかし、図3に示すように、下側バスバーホルダ71の下側には、コイル43が配置される。そのため、下側バスバーアッシー70とステータ40との軸方向の距離が小さくなると、コイル43のコイル端43bを這い回しにくい問題がある。
Claims (15)
- 上下方向に伸びる中心軸に沿って配置されるシャフトと、
前記シャフトに取り付けられるロータアセンブリと、
前記ロータアセンブリと隙間を介して径方向に対向するステータと、
前記ステータと電気的に接続される複数のバスバーと、
を備え、
前記バスバーは、第1バスバーと、第2バスバーと、を含み、
前記第1バスバーは、前記第2バスバーの上側に配置される上側配置部を有し、
前記第2バスバーは、前記上側配置部と軸方向に重なる位置に、下側に窪むバスバー凹部を有する、モータ。 - 前記第1バスバーは、周方向に延びる第1バスバー本体部と、前記第1バスバー本体部から径方向に延びる第1接続端子部と、を有し、
前記第2バスバーは、周方向に延びる第2バスバー本体部と、前記第2バスバー本体部から径方向に延びる第2接続端子部と、を有し、
前記第1バスバー本体部および前記第2バスバー本体部は、前記中心軸と直交する平面に沿って配置される、請求項1に記載のモータ。 - 前記第1バスバー本体部と前記第2バスバー本体部とは、軸方向において、同じ位置にある、請求項2に記載のモータ。
- 前記第1バスバー本体部と前記第2バスバー本体部とは、径方向に並び、
前記上側配置部は、前記第1接続端子部の少なくとも一部であり、
前記バスバー凹部は、前記第2バスバー本体部に配置される、請求項2または3に記載のモータ。 - 前記第2バスバー本体部は、前記バスバー凹部と軸方向に重なる位置に、下側に突出するバスバー凸部を有する、請求項4に記載のモータ。
- 前記バスバーを保持するバスバーホルダを備え、
前記バスバーホルダは、下側に窪むホルダ凹部を有し、
前記バスバー凸部の少なくとも一部は、前記ホルダ凹部内に配置される、請求項5に記載のモータ。 - 前記バスバーホルダは、前記ホルダ凹部と軸方向に重なる位置に、下側に突出するホルダ凸部を有する、請求項6に記載のモータ。
- 前記バスバーを保持するバスバーホルダを備え、
前記バスバーホルダは、前記バスバーホルダを軸方向に貫通するホルダ貫通孔を有し、
前記バスバー凸部の少なくとも一部は、前記ホルダ貫通孔内に配置される、請求項5に記載のモータ。 - 前記第2バスバー本体部の周方向と直交する断面の面積は、前記バスバー凹部が配置される部分、および前記バスバー凹部の周方向両側に配置される部分において、一様である、請求項4から8のいずれか一項に記載のモータ。
- 前記上側配置部は、前記バスバー凹部よりも上側に配置される、請求項4から9のいずれか一項に記載のモータ。
- 前記上側配置部の少なくとも一部は、前記バスバー凹部内に配置される、請求項4から9のいずれか一項に記載のモータ。
- 前記上側配置部の全体は、前記バスバー凹部内に配置される、請求項11に記載のモータ。
- 前記ステータは、複数のコイルを有し、
前記コイルは、導電線の端部であるコイル端を有し、
前記第1接続端子部は、前記第1バスバー本体部から径方向に延びる第1延出部と、前記第1延出部の径方向の端部に配置され前記コイル端と接続される第1接続部と、を有し、
前記第2接続端子部は、前記第2バスバー本体部から径方向に延びる第2延出部と、前記第2延出部の径方向の端部に配置され前記コイル端と接続される第2接続部と、を有し、
前記上側配置部は、前記第1延出部の少なくとも一部である、請求項4から12のいずれか一項に記載のモータ。 - 前記第1接続部と前記第2接続部とは、軸方向において、同じ位置にある、請求項13に記載のモータ。
- 前記第2バスバー本体部における前記バスバー凹部が配置される部分は、湾曲する、請求項4から14のいずれか一項に記載のモータ。
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WO2019021679A1 (ja) * | 2017-07-26 | 2019-01-31 | 日本電産株式会社 | モータ |
WO2019189309A1 (ja) * | 2018-03-29 | 2019-10-03 | 日本電産株式会社 | モータ |
JP2021057999A (ja) * | 2019-09-30 | 2021-04-08 | 日本電産株式会社 | ステータおよびモータ |
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JP6984983B2 (ja) * | 2019-05-10 | 2021-12-22 | 矢崎総業株式会社 | 電気接続箱 |
FR3105644B1 (fr) * | 2019-12-20 | 2023-06-30 | Valeo Equip Electr Moteur | Stator comprenant un interconnecteur |
CN113452179B (zh) * | 2020-03-27 | 2024-04-23 | 日本电产株式会社 | 定子以及马达 |
KR20220040266A (ko) | 2020-09-23 | 2022-03-30 | 현대모비스 주식회사 | 모터용 버스바 유닛 |
KR20230109264A (ko) * | 2022-01-13 | 2023-07-20 | 엘지이노텍 주식회사 | 모터 |
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CN107925297A (zh) | 2018-04-17 |
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US20180233985A1 (en) | 2018-08-16 |
DE112016003650T5 (de) | 2018-05-09 |
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US10374480B2 (en) | 2019-08-06 |
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