Motor

Abstract

A motor includes a stator core, a coil wound around the stator core, a neutral point bus bar connected to the coil, and a bus bar holder holding the neutral point bus bar. The bus bar holder is provided with a refrigerant flow path capable of receiving a refrigerant of the motor and supplying the refrigerant toward a coil end exposed from the stator core.

Description

Technical Field

[0001] The technology disclosed in this specification relates to a motor. Background Art

[0002] The motor includes a stator with a three-phase coil wound on a stator core, and a rotor. At both ends of the stator core in the axial direction, the terminals of the coil extending axially outward from the stator core are connected to each other by welding to form coil ends. A neutral point bus bar is connected to the lead coil extending from a part of the coil end by welding or the like (Japanese Patent Laid-Open No. 2019-110676).

[0003] The neutral point bus bar may occupy a predetermined range of the space on the outer circumference of the stator core. When supplying a coolant to cool the coil end, the coolant may have difficulty reaching the coil end due to the neutral point bus bar. Summary of the invention

[0004] This specification provides a technology for providing a neutral point bus bar in a motor and effectively cooling a coil end.

[0005] The technical solution disclosed in the present invention is a motor. The motor includes a stator core, a coil wound on the stator core, a neutral point bus bar connected to the coil, and a bus bar holder for holding the neutral point bus bar. The bus bar holder has a refrigerant flow path, which can receive the refrigerant of the motor and supply it toward the coil end exposed from the stator core.

[0006] In the motor according to the technical solution of the present disclosure, the refrigerant flow path may include an open refrigerant guide for guiding the refrigerant toward the coil end. According to this aspect, the refrigerant can be supplied to the coil with a simple structure.

[0007] It can also be configured as follows: on the basis of the motor involved in the technical solution of the present disclosure, the refrigerant flow path includes an internal refrigerant flow path, the internal refrigerant flow path passes through the bus bar holder and has an opening for discharging the refrigerant toward the coil end. In this way, the refrigerant can be supplied to the coil more reliably and without waste.

[0008] The motor according to the technical solution of the present disclosure may further include a refrigerant supply passage configured to supply the refrigerant to the refrigerant flow path. According to this aspect, refrigerant is supplied to the refrigerant guide through the refrigerant supply passage, so that refrigerant can be supplied to the coil more efficiently.

[0009] It can also be configured that: based on the motor involved in the technical solution of the present disclosure, the refrigerant flow path includes an open refrigerant guide that guides the refrigerant toward the coil end. The refrigerant supply flow path can also be configured to communicate with the refrigerant guide in a manner that the refrigerant flows or discharge the refrigerant to the refrigerant guide. In this way, the configuration and structural freedom of the bus bar holder and the refrigerant supply flow path can be increased.

[0010] It is also possible to configure the motor according to the technical solution of the present disclosure so that the refrigerant supply flow path is arranged separately from the bus bar holder. The refrigerant guide may also be configured to receive the refrigerant discharged from the refrigerant supply flow path. In this way, the configuration and structural freedom of the bus bar holder and the refrigerant supply flow path can be increased.

[0011] It can also be configured that: on the basis of the motor involved in the technical solution of the present disclosure, the refrigerant flow path includes an internal refrigerant flow path, the internal refrigerant flow path passes through the bus bar holder and has an opening for discharging the refrigerant toward the coil end. It can also be configured that: the refrigerant supply flow path is connected to the internal refrigerant flow path in a manner in which the refrigerant circulates or discharges the refrigerant to the refrigerant acquisition hole of the internal refrigerant flow path. In this way, the refrigerant can be reliably supplied to the coil end via the internal refrigerant flow path.

[0012] In the motor according to the technical solution of the present disclosure, the bus bar holder may include a skirt portion extending toward the coil end portion so that the refrigerant passing through the refrigerant flow path is supplied to the coil end portion. According to this aspect, the refrigerant can be reliably supplied to the coil end portion.

[0013] In the motor according to the technical solution of the present disclosure, the bus bar holder may be configured to supply the coolant to the coil end portion within at least a quarter of the circumference of the stator core. In this way, the coil end portion can be effectively cooled.

[0014] In the motor according to the technical solution of the present disclosure, the refrigerant supply flow path is arranged on the outer periphery of the stator core, thereby facilitating efficient supply of the refrigerant to the bus bar holder.

[0015] In the motor according to the technical solution of the present disclosure, the refrigerant supply flow path passes through the inside of the stator core. In this way, the stator core can be cooled, the coil can be cooled at the same time, and the structure for cooling can be miniaturized.

[0016] According to the above motor, the refrigerant received by the bus bar holder is supplied to the coil, so the coil is cooled efficiently.

[0017] Features, advantages, and technical and industrial significance of exemplary embodiments of the present invention are described below with reference to the accompanying drawings, in which like reference numerals denote like elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a plan view showing a stator, a neutral point bus bar, and a cooling flow path in the motor according to the first embodiment.

[0019] Figure 2 Yes means Figure 1 A cross-section diagram along line Ⅱ-Ⅱ in the top view.

[0020] Figure 3A An example of the skirt portion included in the bus bar holder is shown.

[0021] Figure 3B It shows a refrigerant guide having a refrigerant intake hole.

[0022] Figure 4 It is a plan view showing a stator, a neutral point bus bar, and a cooling flow path in a motor according to a second embodiment.

[0023] Figure 5 Yes means Figure 4 A diagram of the cross section along line V-V in the top view.

[0024] Figure 6 Indicates an internal refrigerant flow path having a refrigerant intake hole.

[0025] Figure 7 It is a diagram showing the cross-sectional structure of a stator, a neutral point bus bar, and a cooling flow path in a motor according to a third embodiment. DETAILED DESCRIPTION

[0026] Hereinafter, in the motor disclosed in this specification, description will be made with appropriate reference to the accompanying drawings. In the specification, the motor is not particularly limited, but for example, it may be a driving motor mounted on an electric vehicle, or it may be a part of a drive motor system (E-Axle), etc. Electric vehicles are BEV, HEV, PHEV, FCV, etc. The upper side in the direction of gravity of the motor when mounted on a vehicle is referred to as the "upper side in the vertical direction", and the lower side in the direction of gravity is referred to as the "lower side in the vertical direction". In addition, in this specification, when it is referred to only as "axial", it refers to the axial direction of the stator of the motor, when it is referred to only as "circumferential", it refers to the circumferential direction of the stator, and when it is referred to only as "radial", it refers to the radial direction of the stator.

[0027] (First embodiment)

[0028] This embodiment involves Figure 1 and Figure 2 The bus bar holder 40 shown as an example includes the motor 2 including an open coolant guide 42 serving as a coolant flow path. Figure 1 A plan view showing the stator 6 , the refrigerant supply flow path 20 , the neutral point bus bar 30 , and the bus bar holder 40 in the motor 2 according to the first embodiment is shown. Figure 2 express Figure 1 Section along line Ⅱ-Ⅱ in the top view.

[0029] The motor 2 includes a rotor 4, a stator 6, a refrigerant supply flow path 20, a neutral point bus bar (hereinafter, also referred to as the bus bar) 30 and a bus bar holder (hereinafter, also referred to as the holder) 40. The stator 6 includes a stator core 8 and a stator coil (hereinafter, also referred to as the coil) 14. The stator core 8 is a roughly annular body relative to the central axis Z of the motor 2, and is composed of, for example, laminated steel plates. The rotor 4 is arranged in the central hole portion of the stator core 8. The stator core 8 includes a plurality of teeth (not shown) protruding radially from the inner circumference of the annular back yoke 10 with a predetermined width, and a socket (not shown) formed between each tooth.

[0030] The coil 14 is formed by winding a conductive wire around the insertion openings that are separated from each other in the circumferential direction of the teeth of the stator core 8. Figure 1 In FIG. 1 , the coil end 14a is schematically shown. Figure 2 , the coil 14 and the coil end 14a are briefly shown. The connection form of the wire used to form the coil 14 is not particularly limited. The coil 14 is composed of a three-phase coil group (not shown). At the end A which is the end on one side of the axial direction of the stator core 8, the coil 14 of the same phase which is wound separately in the circumferential direction is welded to form the coil end 14a which is the end of each phase.

[0031] The refrigerant supply flow path 20 is a pipe for circulating the refrigerant and discharging the refrigerant near the end A. The refrigerant supply flow path 20 is located on the upper side in the vertical direction, and the entire coil can be cooled by the refrigerant flowing from the upper side to the lower side in the vertical direction. The refrigerant supply flow path 20 extends in the axial direction at two predetermined positions on the outer periphery of the stator core 8. The refrigerant supply flow path 20 is arranged separately from the retaining member 40 at a position closer to the outer periphery of the stator core 8 than the retaining member 40. In addition, the refrigerant supply flow path 20 is arranged at two positions that can roughly divide the extension direction of the retaining member 40 into three parts.

[0032] The refrigerant supply flow path 20 is supplied with refrigerant circulating in the motor 2 or the housing 2a that accommodates the motor 2. In the present embodiment, the refrigerant is supplied to the refrigerant supply flow path 20 via the housing 2a and flows toward the end A. The refrigerant supply flow path 20 reaches the protruding position of the coil end 14a protruding from the stator core 8 or its vicinity at one end A of the stator core 8. The refrigerant supply flow path 20 has a discharge port 20a with an end opening. In addition, the discharge port 20a in the present embodiment is opened in the axial direction, but can also be opened in the radial direction. The refrigerant supply flow path 20 can discharge the refrigerant from the discharge port 20a toward the separately arranged retaining member 40. In addition, the refrigerant is not particularly limited, and an oily liquid that can be used for cooling a motor, etc. can be appropriately used.

[0033] The busbar 30 is configured to extend in an arc shape along the circumference of the stator core 8. The busbar 30 has a plurality of connection terminals (not shown) at an arc-shaped base 32 that are separated at a predetermined interval in the extension direction thereof and connected to the ends of each phase of the stator coil. For example, the base 32 of the busbar 30 is configured to be repeatedly arranged on the outer peripheral side of the back yoke 10 with the outer peripheral edge 10a thereof, or to be arranged on the outer peripheral side thereof close to the outer peripheral edge 10a. In addition, the busbar 30 extends to cover a range equivalent to approximately half of the entire circumference of the stator core 8. In addition, the busbar 30 is configured to extend in the axial direction in a manner such that its base 32 separates from the A end of the stator core 8 and reaches the end of the coil end 14a or its vicinity.

[0034] The retainer 40 is a molded body formed of resin or the like that covers the base 32 of the bus bar 30. The retainer 40 covers and holds the base 32, and has a connection terminal and exposes it. The retainer 40 is formed, for example, by injection molding or insert molding of the base 32 with a resin. The retainer 40, for example, extends to cover a range equivalent to about half of the entire circumference of the stator core 8 in a top view, similar to the bus bar 30, and is extended in the axial direction in a manner that is separated from the A end of the stator core 8 and reaches the end of the coil end 14a or its vicinity. In addition, the cross section of the retainer 40 is rectangular.

[0035] A refrigerant guide 42 having a refrigerant flow path that is open in a concave shape is formed in a prescribed pattern on the surface 40a of the retaining member 40 that faces outward along the axial direction. The refrigerant guide 42 is an open channel-shaped member that is formed to be able to receive the refrigerant poured from the refrigerant supply flow path 20 to the refrigerant guide 42. That is, the refrigerant guide 42 is located on the lower side of the discharge port 20a in the vertical direction. In addition, the refrigerant guide 42 is formed to be able to supply the received refrigerant toward the coil 14, particularly toward the coil end 14a. For example, Figure 1As shown, the refrigerant guide 42 includes an arc-shaped elongated guide 44 along the extending direction of the base portion 32 , and a plurality of guides 46 branching from the inner periphery of the guide 44 in the radial direction.

[0036] Next, the cooling of the coil end 14a in the motor 2 will be described. When the refrigerant circulating in the motor 2 and the housing 2a of the motor 2 is supplied to the refrigerant supply flow path 20, the refrigerant flows toward the end A and is discharged from the discharge port 20a of the refrigerant supply flow path 20 toward the holder 40. The discharged refrigerant is poured into the refrigerant guide 42 of the holder 40. The refrigerant reaching the refrigerant guide 42 circulates in the guides 44 and 46 and is supplied from the base 32 of the holder 40 toward the coil end 14a. The base 32 is an arc shape in a predetermined range along the outer periphery of the stator core 8, and the refrigerant is supplied over the corresponding range of the coil end 14a.

[0037] In this way, the refrigerant is supplied to the coil end 14a through the refrigerant guide 42 as a refrigerant flow path provided in the holder 40, and the refrigerant is cooled. In this way, the refrigerant is not blocked by the holder 40, but is guided by the holder 40 to be supplied to the coil end 14a, so that the coil end 14a is effectively cooled. In addition, the holder 40 is also cooled.

[0038] In this embodiment, the retainer 40 is provided over half of the range along the circumference of the stator core 8, and the refrigerant can be supplied over the same range, so the coil end 14a can be effectively cooled. In addition, for example, even if the range along the circumference of the stator core 8 is one-quarter or one-third, the coil end 14a can be sufficiently cooled.

[0039] In this embodiment, the refrigerant supply flow path 20 and the retainer 40 can be separately provided as separate structures, thereby increasing the degree of freedom in designing these components. In addition, the refrigerant supply flow path 20 may not necessarily be provided. In the vicinity of the motor 2, the refrigerant scatters in the housing 2a of the motor 2, and the refrigerant guide 42 of the retainer 40 can appropriately receive such refrigerant and supply it to the coil end 14a.

[0040] In this embodiment, since the holder 40 includes the guides 44 and 46 as the refrigerant guide 42 of the refrigerant flow path, the refrigerant can be supplied to the coil end 14a over the extending direction of the holder 40. The formation pattern of the refrigerant guide 42 is not particularly limited and can be set appropriately.

[0041] And, if Figure 3AAs shown in FIG. 1 , the retainer 40 may also include one or more skirt portions 48 extending from the retainer 40 toward the coil end portion 14a. The skirt portion 48 is formed according to the shape of the retainer 40 and the positional relationship between the retainer 40 and the coil end portion 14a. Figure 3A As shown, the skirt portion 48 extends a predetermined distance in the radial direction from the inner circumference of the arc-shaped holder 40 toward the coil end 14a. For example, the length of the skirt portion 48 is appropriately set so that the refrigerant can be supplied to the outer circumference of the coil end 14a and to the inner circumference. The skirt portion 48 is appropriately formed into a concave shape so that the refrigerant can be easily held and circulated.

[0042] Furthermore, the refrigerant guide 42 may be formed so as to allow the refrigerant to communicate with the refrigerant supply flow path 20. Figure 3B As shown, the refrigerant guide 42 and the refrigerant supply flow path 20 or other refrigerant supply flow paths may be connected via the refrigerant intake hole 42 a of the refrigerant guide 42 so that the refrigerant can flow.

[0043] In the present embodiment, refrigerant can be supplied from two locations on the outer peripheral side of the stator core 8 toward the retaining member 40 in the refrigerant supply flow path 20, so that the coil end 14a can be cooled with more refrigerant. In addition, it is not limited to this, and the refrigerant flow path can be more than one location, or more than three locations. In addition, its position is not limited. In addition, the refrigerant supply flow path 20 has a discharge port 20a at its end, but it can also be provided with one or more discharge ports on the side wall of the refrigerant supply flow path 20 according to the extension form of the refrigerant supply flow path 20 and the positional relationship with the retaining member 40. Furthermore, the refrigerant supply flow path 20 can also be bent in consideration of the refrigerant supply effect on the retaining member 40.

[0044] (Second embodiment)

[0045] This embodiment involves Figure 4 and Figure 5 The illustrated holder 140 includes the motor 102 having an internal refrigerant flow path 142 serving as a refrigerant flow path therein. Figure 4 1. A plan view showing an end portion A of a stator 6 of a motor 102 according to the second embodiment when viewed from above is shown. Figure 5 express Figure 4 In the following description, the points different from the first embodiment are described, and the same reference numerals are used for the same structures as the first embodiment and the description thereof is omitted.

[0046] The motor 102 of the present embodiment includes a rotor 4, a stator 6, a refrigerant supply flow path 120, a bus bar 30, and a holder 140. The motor 102 is accommodated in a housing 102a.

[0047] The refrigerant supply flow path 120 extends in the axial direction at a predetermined position on the outer periphery of the stator core 8. The refrigerant supply flow path 120 is arranged at a substantially central portion of the extending direction of the retainer 140. The refrigerant supply flow path 120 is connected to the retainer 140 just below the retainer 140. The refrigerant supply flow path 120 has a common structure with the refrigerant supply flow path 20 of the first embodiment, except for the number and position of the refrigerant supply flow path 120, and the connection with the retainer 140 and the absence of a discharge port at the end.

[0048] The holder 140 has an internal refrigerant flow path 142 in its arc-shaped interior. The holder 140 is connected to the refrigerant supply flow path 120 at its bottom, and the refrigerant supply flow path 120 and the internal refrigerant flow path 142 communicate with each other so that the refrigerant can flow.

[0049] The internal refrigerant flow path 142 includes an arc-shaped flow path 144 similar to the retainer 140, and a plurality of flow paths 146 branching from the inner circumference of a predetermined position of the flow path toward the radial inner side. Figure 4 In the figure, the flow paths 144 and 146 are flow paths inside the retaining member 140, but for the sake of convenience, they are simplified and marked in the top view. The ends of the flow paths extending into arc shapes are opened at both ends in the direction in which the retaining member 140 extends, forming refrigerant discharge ports 144a and 144b. In addition, a plurality of flow paths 146 are opened on the inner peripheral surface of the retaining member 140 to form a plurality of refrigerant discharge ports 146a. These discharge ports 144a, 144b, and 146a are respectively directed to the coil end 14a, and are formed to be able to discharge refrigerant to the coil end 14a.

[0050] The retainer 140 has the same structure as the retainer 40 of the first embodiment except for its installation position, connection with the refrigerant supply flow path 120 , and an internal refrigerant flow path 142 communicating with the refrigerant supply flow path 120 instead of the refrigerant guide 42 .

[0051] Next, the cooling of the coil end 14a in the motor 102 is described. First, if the refrigerant flowing in the housing 102a of the motor 102 is supplied to the refrigerant supply flow path 120, the refrigerant flows toward the end A and reaches the internal refrigerant flow path 142 of the holder 140. The refrigerant passes through the internal refrigerant flow path 142 and is discharged from the discharge ports 144a, 144b, and 146a toward the coil end 14a, and the refrigerant is supplied. The holder 140 and the internal refrigerant flow path 142 are arc-shaped in a predetermined range along the outer periphery of the stator core 8, and the refrigerant is supplied throughout the corresponding range of the coil end 14a.

[0052] In this way, the refrigerant is supplied to the coil end 14a through the internal refrigerant flow path 142 provided in the holder 140 to cool it. In this way, the refrigerant is not blocked by the holder 140, but is supplied to the coil end 14a through the internal refrigerant flow path 142 built into the holder 140, thereby effectively cooling the coil end 14a. In addition, the holder 140 is also cooled.

[0053] In the present embodiment, the coolant supply flow path 120 is connected to the holder 140, so that a desired amount of coolant can be reliably supplied to the coil end portion 14a without waste. Therefore, the coil end portion 14a can be cooled in a more desired manner.

[0054] In addition, in this embodiment, the refrigerant supply flow path 120 is provided, but the present invention is not limited thereto. For example, near the motor 102, the refrigerant is scattered in the housing 102a of the motor 102. Figure 6 As shown, the internal refrigerant flow path 142 of the holder 140 includes a refrigerant intake hole 142 a opened to the outside of the holder 140 so as to receive such refrigerant, thereby supplying the refrigerant to the coil 14 and the like through the internal refrigerant flow path 142 .

[0055] In the present embodiment, the internal refrigerant flow path 142 is constituted by the arc-shaped flow path 144 and the branched flow path 146, but it is not limited thereto. The internal refrigerant flow path 142 is connected to the refrigerant supply flow path 120, but it is not particularly limited as long as it is opened at the inner periphery of the retainer 140 and / or the arc-shaped end portion extending to the retainer 140. For example, it may be provided with a plurality of paths and a plurality of openings that branch directly from the connection portion with the refrigerant supply flow path 120 and its vicinity toward the radial inside and / or in an arc shape toward the circumferential direction, or it may be provided with a single path and a single opening that branch directly from the above-mentioned connection portion toward the radial inside and / or in an arc shape toward the circumferential direction.

[0056] The configuration and form of the refrigerant supply passage 120 and the retainer 140 in this embodiment can adopt various technical solutions similar to those in the first embodiment. In addition, the retainer 140 can also extend from the discharge ports 144a, 144b, 146a of the internal refrigerant passage 142 and have a skirt portion of various technical solutions similar to the first embodiment.

[0057] (Third embodiment)

[0058] This embodiment involves Figure 7 The illustrated holder 240 is connected to the motor 202 which is in communication with a refrigerant supply flow path 220 that penetrates the interior of the stator core 208 . Figure 7 A cross-sectional view along the axial direction of a stator 206 of a motor 202 according to a third embodiment is shown. In the following description, differences from the first embodiment are described, and the same reference numerals are used for the same configurations as those of the first embodiment, and description thereof is omitted.

[0059] The motor 202 of the present embodiment includes a rotor 4, a stator 206, a refrigerant supply flow path 220, a bus bar 230, and a holder 240. The motor 202 is accommodated in a housing 202a.

[0060] The stator 206 has a refrigerant supply flow path 220. The refrigerant supply flow path 220 penetrates the inside of the stator core 208 in the axial direction. For example, the refrigerant supply flow path 220 is formed so that the refrigerant is supplied from the housing 202a and flows toward the end A. The refrigerant supply flow path 220 is not particularly limited, but is, for example, formed in the back yoke 210 of the stator core 208. A plurality of refrigerant supply flow paths 220 are provided along the circumferential direction of the stator core 208, and the refrigerant supply flow paths 220 formed in the range where the retainer 240 is arranged are communicated with the internal refrigerant flow path 242 which is the refrigerant flow path of the retainer 240.

[0061] The holder 240 holds the bus bar 230 and is disposed at the end A of the stator core 208 or near the end A. The holder 240 has an internal refrigerant flow path 242 as a refrigerant flow path therein. The holder 240 is integrated with the refrigerant supply flow path 220 on the surface facing the end A, and the refrigerant supply flow path 220 and the internal refrigerant flow path 242 are connected in a manner that the refrigerant can flow.

[0062] Although not shown, the internal refrigerant flow path 242 is similar to the second embodiment and includes an arc-shaped flow path imitating the retainer 240 and a plurality of flow paths branching from the inner circumference of a predetermined position of the flow path toward the radial inside, and includes the same discharge port.

[0063] The holder 240 has the same structure as the holder 40 of the first embodiment except for the above-mentioned structure.

[0064] Next, the cooling of the coil end 14a in the motor 202 is described. First, if the refrigerant flowing in the housing 202a of the motor 202 is supplied to the refrigerant supply flow path 220, the refrigerant passing through the refrigerant supply flow path 220 flows toward the end A and reaches the internal refrigerant flow path 242 of the retainer 240. The refrigerant is discharged and supplied from the discharge port toward the coil end 14a through the internal refrigerant flow path 242. The retainer 240 and the internal refrigerant flow path 242 are arc-shaped in a predetermined range along the outer periphery of the stator core 280, and the refrigerant is supplied throughout the corresponding range of the coil end 14a.

[0065] Thus, the refrigerant is supplied to the coil end 14a through the internal refrigerant flow path 242 provided in the holder 240 to cool it. Thus, the refrigerant is supplied to the coil end 14a without being blocked by the holder 240, so the coil end 14a is effectively cooled. In addition, the stator core 208 and the holder 240 are also cooled.

[0066] In this embodiment, the refrigerant supply flow path 220 is connected to the holder 240, so that, as in the second embodiment, the refrigerant can be reliably supplied to the coil end 14a in a required amount without waste, and the coil end 14a can be cooled in a more desired form. In addition, in this embodiment, the refrigerant supply flow path 220 passes through the stator core 208 and is not arranged on the outer periphery of the stator core 208, so the cooling structure can be miniaturized.

[0067] In the present embodiment, the internal refrigerant flow path 242 is constituted by the arc-shaped flow path and the branched flow paths, but the present invention is not limited thereto and various technical means can be adopted similarly to the second embodiment.

[0068] The arrangement and form of the holder 240 in this embodiment can adopt various technical means similar to the first embodiment. In addition, the holder 240 can also be provided with skirt portions of various forms as appropriate according to the positional relationship with the coil end 14a, similar to the first embodiment.

[0069] The first to third embodiments have been described above, but these embodiments can be appropriately combined. For example, the holder 40 , 140 , 240 can also be equipped with the refrigerant flow path 42 , 142 , 242 and the refrigerant supply flow path 20 , 120 , 220 in an appropriate combination.

[0070] The specific examples of the technology disclosed in this specification are described in detail above, but these are only examples and do not limit the claims. The technology described in the claims includes various deformations and changes to the specific examples illustrated above. The technical elements described in this specification or the drawings exert technical usefulness alone or through various combinations, and are not limited to the combination recorded in the claims at the time of application. The technology illustrated in this specification or the drawings can achieve multiple purposes at the same time, and achieving one of the purposes itself has technical usefulness.

Claims

1. A motor, characterized in that: The motor comprises: stator core; A coil, wound around the stator core; a neutral point bus bar connected to the coil; and a bus bar holder, holding the neutral point bus bar, in, The bus bar holder includes a coolant flow path that can receive the coolant of the motor and supply the coolant toward the coil end portions exposed from the stator core.

2. The motor according to claim 1, characterized in that The refrigerant flow path includes an opened refrigerant guide that guides the refrigerant toward the coil end.

3. The motor according to claim 1, characterized in that The refrigerant flow path includes an internal refrigerant flow path that passes through the bus bar holder and has an opening that discharges the refrigerant toward the coil end portion.

4. The motor according to claim 1, characterized in that The invention further includes a refrigerant supply flow path configured to supply the refrigerant to the refrigerant flow path.

5. The motor according to claim 4, characterized in that The refrigerant flow path includes an opened refrigerant guide that guides the refrigerant toward the coil end; The refrigerant supply flow path is configured to communicate with the refrigerant guide so that the refrigerant can flow through the refrigerant guide or to discharge the refrigerant to the refrigerant guide.

6. The motor according to claim 5, characterized in that The refrigerant supply flow path is arranged separately from the bus bar holder; Furthermore, the refrigerant guide is configured to receive the refrigerant discharged from the refrigerant supply flow path.

7. The motor according to claim 4, characterized in that The refrigerant flow path includes an internal refrigerant flow path that passes through the bus bar holder and has an opening for discharging the refrigerant toward the coil end; Furthermore, the refrigerant supply flow path communicates with the internal refrigerant flow path so that the refrigerant can flow in the internal refrigerant flow path or discharges the refrigerant to a refrigerant intake hole of the internal refrigerant flow path.

8. The motor according to claim 1, characterized in that The bus bar holder has a skirt portion extending toward the coil end portion so as to supply the refrigerant passing through the refrigerant flow path to the coil end portion.

9. The motor according to claim 1, characterized in that The bus bar holder is configured to supply the refrigerant to the coil end portion within at least a quarter of the circumference of the stator core.

10. The motor according to any one of claims 4 to 7, characterized in that: The refrigerant supply flow path is arranged on the outer periphery of the stator core.

11. The motor according to any one of claims 4 to 7, characterized in that: The refrigerant supply flow path passes through the interior of the stator core.

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