Motor

Abstract

To provide a technology for effectively cooling coil ends in a motor while providing a neutral bus bar.SOLUTION: A motor 2 includes a stator core 8, a coil 14 wound around the stator core, a neutral busbar 30 connected to the coil, and a busbar holder 40 that holds the neutral busbar 30. The busbar holder 40 has at least one refrigerant flow path 42 that receives refrigerant from the motor 2 and can supply it toward the coil end 14a exposed from the stator core 8.SELECTED DRAWING: Figure 1

Description

Technical Field

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

Background Art

[0002] A motor includes a stator in which three-phase coils are wound around a stator core, and a rotor. At both axial ends of the stator core, terminals of the coils extending axially outward from the stator core are connected by welding to form coil ends. A neutral point bus bar is connected to a lead-out coil extending from a part of such coil ends by welding or the like (Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] There are cases where the neutral point bus bar occupies a predetermined range of the space on the outer peripheral side of the stator core. When attempting to supply a refrigerant for cooling the coil ends, the refrigerant may be difficult to reach the coil ends due to the neutral point bus bar.

[0005] This specification provides a technology for effectively cooling coil ends while including a neutral point bus bar in a motor. To provide such technology.

Means for Solving the Problems

[0006] The technology disclosed in this specification is embodied in a motor. The 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 for holding the neutral point bus bar. The bus bar holder has a refrigerant flow path that can receive the refrigerant of the motor and supply it toward the coil.

[0007] According to the above motor, since the refrigerant received by the bus bar holder is supplied to the coil, the coil is effectively cooled.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2A

Figure 2B

Figure 3

Figure 4

Figure 5

Modes for Carrying Out the Invention

[0009] One embodiment of the motor disclosed in this specification 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 for holding the neutral point bus bar. The bus bar holder has a refrigerant flow path that can receive the refrigerant of the motor and supply it toward the coil.

[0010] Another embodiment of the motor is that the at least one refrigerant flow path may include an open refrigerant guide that guides the refrigerant toward the coil. According to this embodiment, the refrigerant can be supplied to the coil with a simple configuration.

[0011] Another embodiment of the motor is that the at least one refrigerant flow path may include an internal refrigerant flow path that passes through the busbar holder and has an opening for discharging the refrigerant toward the coil end. By doing so, the refrigerant can be more reliably supplied to the coil without waste.

[0012] Another embodiment of the motor may further include at least one refrigerant supply flow path for supplying the refrigerant to the refrigerant guide. According to this embodiment, since the refrigerant is supplied to the refrigerant guide by the refrigerant supply flow path, the refrigerant can be supplied to the coil more efficiently.

[0013] Another embodiment of the motor is that the at least one refrigerant flow path includes an open refrigerant guide that guides the refrigerant toward the coil end, and the at least one refrigerant supply flow path may include communicating with the refrigerant guide so that the refrigerant can flow therethrough or discharging the refrigerant to the refrigerant guide. Further, in this other embodiment, the at least one refrigerant supply flow path is arranged spaced apart from the busbar holder, and the at least one refrigerant guide may be configured to receive the refrigerant discharged from the at least one refrigerant supply flow path. By doing so, the degree of freedom in the arrangement and configuration of the busbar holder and the refrigerant supply flow path can be increased.

[0014] Another embodiment of the motor is that the at least one refrigerant flow path includes an internal refrigerant flow path that passes through the busbar holder and has an opening for discharging the refrigerant toward the coil end, and the at least one refrigerant supply flow path may communicate with the internal refrigerant flow path so that the refrigerant can flow therethrough or may include discharging the refrigerant into a refrigerant intake hole of the internal refrigerant flow path. By doing so, the refrigerant can be surely supplied to the coil end through the internal refrigerant flow path.

[0015] Another embodiment of the motor is that the busbar holder may further include at least one skirt portion extending toward the coil end so as to be able to supply the refrigerant that has passed through the refrigerant flow path to the coil end. According to this configuration, the refrigerant can be surely supplied to the coil end.

[0016] Another embodiment of the motor is that the busbar holder may be configured to be able to supply the refrigerant to the coil end within at least a quarter of the circumference of the stator core. By doing so, the coil end can be effectively cooled.

[0017] Another embodiment of the motor is that the at least one refrigerant supply flow path may be arranged on the outer periphery of the stator core. By doing so, it is convenient to efficiently supply the refrigerant to the busbar holder.

[0018] Another embodiment of the motor is that the at least one refrigerant supply flow path may include passing through the inside of the stator core. By doing so, the stator core can be cooled, the coil can be cooled at the same time, and the structure for cooling can be made compact.

[0019] Hereinafter, in the motor disclosed in this specification, it will be described with reference to the drawings as appropriate. In the specification, the motor is not particularly limited, and for example, it may be a driving motor mounted on an electric vehicle, or may be a part such as an e-axle. The electric vehicle is a BEV, HEV, PHEV, FCV, etc. The upper side in the direction of gravity when mounted on the 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". Also, in this specification, when simply referring to the "axial direction", it means the axial direction of the stator provided in the motor, when simply referring to the "circumferential direction", it means the circumferential direction of the stator, and when simply referring to the "radial direction", it means the radial direction of the stator.

[0020] (First Embodiment) This embodiment relates to a motor 2 in which a busbar holder 40 includes an open refrigerant guide 42 as a refrigerant flow path, as illustrated in FIG. 1. FIG. 1 shows a plan view of the stator 6, the refrigerant supply passage 20, the neutral point busbar 30, and the busbar holder 40 in the motor 2 of the first embodiment, and a cross-section taken along line I-I in the plan view.

[0021] The motor 2 includes a rotor 4, a stator 6, a refrigerant supply passage 20, a neutral point busbar (hereinafter, also simply referred to as a busbar) 30, and a busbar holder (hereinafter, also simply referred to as a holder) 40. The stator 6 includes a stator core 8 and a stator coil (hereinafter, also simply referred to as a coil) 14. The stator core 8 is a substantially annular body with respect to the central axis Z of the motor 2 and is made of, for example, laminated steel plates. The rotor 4 is disposed in the central hole of the stator core 8. The stator core 8 includes a plurality of teeth (not shown) protruding radially from the inner peripheral surface of an annular back yoke 10 with a predetermined width, and slots (not shown) formed between the respective teeth.

[0022] The coil 14 is configured such that the conducting wire is wound around slots circumferentially spaced apart in the teeth of the stator core 8. In FIG. 1, the coil 14 and the coil end 14a are shown in a simplified manner. The connection form of the conducting wire for forming the coil 14 and the like is not particularly limited. The coil 14 is composed of a three-phase coil group (not shown). At the end A, which is one end of the stator core 8 in the axial direction, the coils 14 of the same phase wound circumferentially spaced apart are welded to form the coil end 14a, which is the end of each phase.

[0023] The refrigerant supply passage 20 is a pipe through which the refrigerant flows and discharges the refrigerant in the vicinity of the end A. The refrigerant supply passage 20 is located on the upper side in the vertical direction, and the refrigerant can cool the entire coil by flowing from the upper side to the lower side in the vertical direction. The refrigerant supply passage 20 extends axially at two predetermined locations on the outer periphery of the stator core 8. The refrigerant supply passage 20 is arranged on the outer peripheral side of the stator core 8 and separated from the holder 40 with respect to the holder 40. Further, the refrigerant supply passage 20 is arranged at two positions that generally divide the extending direction of the holder 40 into three parts.

[0024] The refrigerant supply passage 20 is supplied with the refrigerant that circulates in the motor 2 or in the casing 2a that houses the motor 2. In this embodiment, the refrigerant is supplied to the refrigerant supply passage 20 through the casing 2a and flows toward the end A. The refrigerant supply passage 20 reaches the protruding position of the coil end 14a protruding from the stator core 8 or the vicinity thereof at one end A of the stator core 8. The refrigerant supply passage 20 has a discharge port 20a with an open end. In this embodiment, the discharge port 20a opens in the axial direction, but it may also open in the radial direction. The refrigerant supply passage 20 is capable of discharging the refrigerant from the discharge port 20a toward the holder 40 arranged at a distance from the discharge port 20a. The refrigerant is not particularly limited, and an oily liquid that can be used for cooling a known motor or the like is appropriately used.

[0025] The bus bar 30 is arranged to extend in an arc shape along the circumferential direction of the stator core 8. The bus bar 30 includes a plurality of connection terminals (not shown) that are connected to the ends of each phase of the stator coil at predetermined intervals in the extending direction on the arc-shaped base 32. For example, the base 32 of the bus bar 30 is arranged on the outer peripheral side so as to overlap with or be close to the outer peripheral edge 10a of the back yoke 10. Further, the bus bar 30 extends over a range corresponding to about half of the entire circumference in the circumferential direction of the stator core 8. Also, the bus bar 30 is arranged to extend axially away from the A end of the stator core 8 such that its base 32 reaches the end of the coil end 14a or the vicinity thereof.

[0026] The holder 40 is a molded body formed of resin or the like that covers the base 32 of the bus bar 30. The holder 40 covers and holds the base 32 and exposes the connection terminals. The holder 40 is formed, for example, by injection molding or insert molding of resin onto the base 32. The holder 40 extends over a range corresponding to about half of the entire circumference in the circumferential direction of the stator core 8, similar to the bus bar 30 in plan view, and is arranged to extend axially away from the A end of the stator core 8 such that it reaches the end of the coil end 14a or the vicinity thereof. Also, the cross section of the holder 40 is rectangular.

[0027] On the surface 40a facing outward in the axial direction in the holder 40, a refrigerant guide 42 is formed as a concave and open refrigerant flow path in a predetermined pattern. The refrigerant guide 42 is in the form of an open channel and is formed so as to be able to receive the refrigerant poured down from the refrigerant supply flow path 20 with respect to the refrigerant guide 42. That is, the refrigerant guide 42 is located below the discharge port 20 in the vertical direction. Also, the refrigerant guide 42 is formed so as to be able to supply the received refrigerant toward the coil 14, particularly the coil end 14a. The refrigerant guide 42 includes, for example, an arc-shaped elongated guide 44 along the extending direction of the base 32 and a plurality of guides 46 branching radially from the inner circumference of the guide 44, as shown in FIG. 1.

[0028] Next, the cooling of the coil end 14a in the motor 2 will be described. When the refrigerant flowing through the motor 2 and the casing 2a of the motor 2 is supplied to the refrigerant supply passage 20, the refrigerant flows toward the end A, and the refrigerant is discharged from the discharge port 20a of the refrigerant supply passage 20 toward the holder 40. The discharged refrigerant is poured onto the refrigerant guide 42 of the holder 40. The refrigerant that reaches the refrigerant guide 42 flows through 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 arc-shaped along a predetermined range of the outer peripheral edge of the stator core 8, and the refrigerant will be supplied over the corresponding range of the coil end 14a.

[0029] In this way, the refrigerant is supplied to and cooled by the coil end 14a by the refrigerant guide 42 as the refrigerant flow path provided in the holder 40. By doing so, the refrigerant is not obstructed by the holder 40, but rather is guided by the holder 40 and supplied to the coil end 14a, so that the coil end 14a is effectively cooled. Also, the holder 40 is cooled.

[0030] In the present embodiment, since the holder 40 is provided over half of the range along the circumferential direction of the stator core 8 and the refrigerant can be supplied over the same range, the coil end 14a can be effectively cooled. Note that, for example, even if it is about one-fourth or one-third of the range along the circumferential direction of the stator core 8, the coil end 14a can be sufficiently cooled.

[0031] In the present embodiment, since the refrigerant supply passage 20 and the holder 40 are separate configurations and can be installed separately, the design freedom of these can be increased. Note that it is not always necessary to provide the refrigerant supply passage 20. In the vicinity of the motor 2, the refrigerant is scattered inside the casing 2a of the motor 2, and the refrigerant guide 42 of the holder 40 can appropriately receive such refrigerant and supply it to the coil end 14a.

[0032] In this embodiment, since the holder 40 includes guides 44 and 46 as a refrigerant guide 42 serving as a refrigerant flow path, refrigerant can be supplied to the coil end 14a over the extending direction of the holder 40. Note that the formation pattern of the refrigerant guide 42 is not particularly limited and is set as appropriate.

[0033] Furthermore, as shown in FIG. 2A, the holder 40 may also include one or more skirt portions 48 extending from the holder 40 toward the coil end 14a. The skirt portion 48 is formed according to the form of the holder 40 and the positional relationship between the holder 40 and the coil end 14a. As shown in FIG. 2A, the skirt portion 48 extends a predetermined distance from the inner circumference of the arcuate holder 40 along the radial direction toward the coil end 14a. The length etc. of the skirt portion 48 are set as appropriate so that, for example, refrigerant can be supplied to the outer peripheral side or the more inner peripheral side of the coil end 14a. The skirt portion 48 is appropriately formed in a concave shape so as to easily hold and circulate the refrigerant.

[0034] Furthermore, the refrigerant guide 42 may be formed such that refrigerant can communicate with the refrigerant supply flow path 20. For example, as shown in FIG. 2B, the refrigerant guide 42 and the refrigerant supply flow path 20 or another refrigerant supply flow path may be connected via a refrigerant intake hole 42a of the refrigerant guide 42 so that refrigerant can flow through.

[0035] In this embodiment, since the refrigerant supply flow path 20 can supply refrigerant from a plurality of two locations on the outer peripheral side of the stator core 8 toward the holder 40, the coil end 14a can be cooled with more refrigerant. Note that the present invention is not limited to this, and the refrigerant flow path may be one or more locations, and may be three or more locations. Its position is also not limited. Furthermore, although the refrigerant supply flow path 20 is provided with a discharge port 20a at its end, depending on the extending form of the refrigerant supply flow path 20 and the positional relationship with the holder 40, one or more discharge ports may be provided on the side wall of the refrigerant supply flow path 20. Furthermore, the refrigerant supply flow path 20 may be bent in consideration of the refrigerant supply effect to the holder 40.

[0036] (Second Embodiment) This embodiment relates to a motor 102 in which a holder 140 includes an internal refrigerant flow path 142 as a refrigerant flow path therein, as illustrated in FIG. 3. FIG. 3 shows a plan view seen from an end portion A of a stator 6 of the motor 102 according to the second embodiment and a cross section taken along line III-III in the plan view. In the following description, the points different from the first embodiment will be mainly described, and the description of the configurations common to the first embodiment will be omitted by using the same reference numerals.

[0037] The motor 102 of this 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 housed in a casing 102a.

[0038] The refrigerant supply flow path 120 extends axially at a predetermined one location on the outer periphery of the stator core 8. The refrigerant supply flow path 120 is disposed substantially at the center in the extending direction of the holder 140. The refrigerant supply flow path 120 is connected to the holder 140 directly below the holder 140. The refrigerant supply flow path 120 has the same configuration as the refrigerant supply flow path 20 of the first embodiment except for the number and location of its installation and the fact that it has no discharge port at the end connected to the holder 140.

[0039] The holder 140 includes an internal refrigerant flow path 142 inside its arc shape. 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 are communicatively connected so that refrigerant can flow therethrough.

[0040] The internal refrigerant flow path 142 includes an arcuate flow path 144 following the holder 140 and a plurality of flow paths 146 branching radially inward from the inner periphery at a predetermined position of this flow path. In FIG. 3, the flow paths 144 and 146 are flow paths inside the holder 140, but are also shown explicitly and simplified in a plan view for the sake of explanation. The ends where the flow path extends in an arc shape are open at both ends in the direction in which the holder 140 extends, forming refrigerant discharge ports 144a and 144b. Further, the plurality of flow paths 146 open on the inner peripheral surface of the holder 140, forming a plurality of refrigerant discharge ports 146a. These discharge ports 144a, 144b, and 146a each point toward the coil end 14a and are formed so as to be able to discharge refrigerant to the coil end 14a.

[0041] The holder 140 has the same configuration as the holder 40 of the first embodiment except for its installation location, the point of connection to the refrigerant supply flow path 120, and the point of providing the internal refrigerant flow path 142 that communicates with the refrigerant supply flow path 120 instead of providing the refrigerant guide 42.

[0042] Next, the cooling of the coil end 14a in the motor 102 will be described. First, when the refrigerant flowing through the casing 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 is discharged and supplied from the discharge ports 144a, 144b, and 146a toward the coil end 14a through the internal refrigerant flow path 142. The holder 140 and the internal refrigerant flow path 142 are arcuate along a predetermined range of the outer peripheral edge of the stator core 8, and refrigerant is supplied over the corresponding range of the coil end 14a.

[0043] In this way, the internal refrigerant flow path 142 provided in the holder 140 supplies refrigerant to the coil end 14a for cooling. By doing so, the refrigerant passes through the internal refrigerant flow path 142 inherent in the holder 40 and is supplied to the coil end 14a without being obstructed by the holder 140, so that the coil end 14a is effectively cooled. Also, the holder 140 is cooled.

[0044] In this embodiment, by connecting the refrigerant supply passage 120 and the holder 140, it is possible to reliably supply the intended amount of refrigerant to the coil end 14a without waste. Therefore, the cooling of the coil end 14a can be performed in a more intended manner.

[0045] In this embodiment, although the refrigerant supply passage 120 is provided, the present invention is not limited to this. For example, in the vicinity of the motor 102, the refrigerant is scattered inside the casing 102a of the motor 102. For example, as shown in FIG. 4, by providing the refrigerant intake hole 142a in which the internal refrigerant passage 142 of the holder 140 opens to the outside of the holder 140 so as to receive such refrigerant, the refrigerant can be supplied to the coil 14 and the like through the internal refrigerant passage 142.

[0046] In this embodiment, the internal refrigerant passage 142 is composed of an arc-shaped passage 144 and a branched passage 146, but the present invention is not limited to this. The internal refrigerant passage 142 communicates with the refrigerant supply passage 120, but is not particularly limited as long as it opens at the inner circumference of the holder 140 and / or at the end portion of the holder 140 extending in an arc shape. For example, it may include a plurality of paths and a plurality of openings that branch directly from the communication portion with the refrigerant supply passage 120 and its vicinity, radially inward and / or in an arc shape in the circumferential direction, or it may include a single path and a single opening that branch directly from the communication portion, radially inward and / or in an arc shape in the circumferential direction.

[0047] The arrangement and form of the refrigerant supply passage 120 and the holder 140 in this embodiment can take various aspects similar to those in the first embodiment. Further, the holder 140 may be provided with skirt portions in various aspects extending from the discharge ports 144a, 144b, 146a of the internal refrigerant passage 142, similar to the first embodiment.

[0048] (Third Embodiment) This embodiment relates to a motor 202 in which a holder 240 communicates with a refrigerant supply passage 220 that penetrates inside a stator core 208, as illustrated in FIG. 5. FIG. 5 shows a cross-sectional view along the axial direction of a stator 206 of the motor 202 according to the third embodiment. In the following description, the differences from the first embodiment will be mainly described, and for the configurations common to the first embodiment, the same reference numerals will be used and their description will be omitted.

[0049] The motor 202 of this embodiment includes a rotor 4, a stator 206, a refrigerant supply passage 220, a bus bar 230, and a holder 240. The motor 202 is housed in a casing 202a.

[0050] The stator 206 has a refrigerant supply passage 220. The refrigerant supply passage 220 penetrates axially inside the stator core 208. For example, the refrigerant supply passage 220 is formed such that refrigerant is supplied from the casing 202a and flows toward end A. The refrigerant supply passage 220 is not particularly limited, but is formed in the back yoke 210 of the stator core 208, for example. A plurality of refrigerant supply passages 220 are provided along the circumferential direction of the stator core 208, and the refrigerant supply passage 220 formed in the range where the holder 240 is disposed communicates with an internal refrigerant passage 242 that is a refrigerant flow path of the holder 240.

[0051] The holder 240 holds the bus bar 230 and is disposed close to or at end A of the stator core 208. The holder 240 has an internal refrigerant passage 242 as a refrigerant flow path inside thereof. The holder 240 is integrated with the refrigerant supply passage 220 on the surface facing end A, and the refrigerant supply passage 220 and the internal refrigerant passage 242 are communicatively connected so that refrigerant can flow through them.

[0052] Although not shown, the internal refrigerant passage 242 includes an arc-shaped passage following the holder 240 and a plurality of passages branching radially inward from the inner circumference at a predetermined position of this passage, and has the same discharge port, as in the second embodiment.

[0053] The holder 240 has the same configuration as the holder 40 of the first embodiment except for the above-described configuration.

[0054] Next, the cooling of the coil end 14a in the motor 202 will be described. First, when the refrigerant flowing through the casing 202a of the motor 202 is supplied to the refrigerant supply passage 220, the refrigerant passing through the refrigerant supply passage 120 flows toward the end portion A and reaches the internal refrigerant passage 242 of the holder 240. The refrigerant is discharged from the discharge port toward the coil end 14a through the internal refrigerant passage 242 and is supplied. The holder 240 and the internal refrigerant passage 242 are arc-shaped along a predetermined range of the outer peripheral edge of the stator core 8, and the refrigerant is supplied over the corresponding range of the coil end 14a.

[0055] In this way, the refrigerant is supplied to and cooled by the coil end 14a through the internal refrigerant passage 242 provided in the holder 240. By doing so, the refrigerant is supplied to the coil end 14a without being obstructed by the holder 240, so that the coil end 14a is effectively cooled. Also, the stator core 208 and the holder 240 are cooled.

[0056] In the present embodiment, by configuring the refrigerant supply passage 220 to be connected to the holder 240, as in the second embodiment, it is possible to reliably supply the intended amount of refrigerant to the coil end 14a without waste, and in some cases, it is possible to cool the coil end 14a in a more intended form. Further, in the present embodiment, since the refrigerant supply passage 220 penetrates the inside of the stator core 208 and is not disposed on the outer periphery of the stator core 208, the cooling structure can be made compact.

[0057] In the present embodiment, the internal refrigerant passage 242 is configured by an arc-shaped passage and a branched passage, but the present invention is not limited thereto. Various aspects can be adopted as in the second embodiment.

[0058] In the present embodiment, the arrangement and form of the holder 240 can adopt various aspects similar to those of the first embodiment. Further, the holder 240 can also be provided with skirt portions in various aspects, as appropriate, according to the positional relationship with the coil end 14a, in the same manner as in the first embodiment.

[0059] Although the above first to third embodiments have been described, these embodiments can be combined as appropriate. For example, the holders 40, 140, and 240 can also be provided by appropriately combining the refrigerant flow paths 42, 142, and 242 with the refrigerant supply channels 20, 120, and 220.

[0060] According to the disclosure of the present specification, the present specification can include the following configurations. [1] A motor, A stator core, A coil wound around the stator core, A neutral point bus bar connected to the coil, A bus bar holder that holds the neutral point bus bar, Comprising, The bus bar holder includes at least one refrigerant flow path that can receive the refrigerant of the motor and supply it toward the coil end exposed from the stator core. Motor. [2] The motor according to [1], wherein the at least one refrigerant flow path includes an open refrigerant guide that guides the refrigerant toward the coil end. [3] The motor according to [1] or [2], wherein the at least one 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. [4] The motor according to any one of [1] to [3], further comprising at least one refrigerant supply channel that supplies the refrigerant to the at least one refrigerant flow path. [5] The at least one refrigerant flow path includes an open refrigerant guide that guides the refrigerant toward the coil end, The at least one refrigerant supply passage communicates with the refrigerant guide so that the refrigerant can flow therethrough or discharges the refrigerant to the refrigerant guide, the motor according to [4]. [6] The at least one refrigerant supply passage is disposed spaced apart from the bus bar holder, The at least one refrigerant guide is configured to receive the refrigerant discharged from the at least one refrigerant supply passage, the motor according to [5]. [7] The at least one refrigerant flow passage includes an internal refrigerant flow passage that passes through the bus bar holder and has an opening for discharging the refrigerant toward the coil end, The at least one refrigerant supply passage communicates with the internal refrigerant flow passage so that the refrigerant can flow therethrough or discharges the refrigerant to the refrigerant intake hole of the internal refrigerant flow passage, the motor according to [4]. [8] The bus bar holder further has at least one skirt portion extending toward the coil end so as to be able to supply the refrigerant that has passed through the refrigerant flow passage to the coil end, the motor according to any one of [1] to [7]. [9] The bus bar holder is configured to be able to supply the refrigerant to the coil end within at least a quarter of the circumference of the stator core, the motor according to any one of [1] to [8].

[10] The at least one refrigerant supply passage is disposed on the outer periphery of the stator core, the motor according to any one of [4] to [9].

[11] The at least one refrigerant supply passage penetrates through the inside of the stator core, the motor according to any one of [4] to

[10] .

[0061] As described above, specific examples of the technology disclosed in this specification have been described in detail, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes to the specific examples exemplified above. The technical elements described in this specification or the drawings exhibit technical utility either alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. The technology exemplified in this specification or the drawings can achieve a plurality of purposes simultaneously, and achieving one of these purposes itself has technical utility.

Description of Reference Numerals

[0062] 2, 102, 202 motor, 4 rotor, 6 stator, 8, 208 stator core, 10, 210 back yoke, 14 stator coil, 14a coil end, 20, 120, 220 refrigerant supply flow path, 20a discharge port, 30 neutral point bus bar, 32 base, 40, 140, 240 bus bar holder, 42, 142, 242 refrigerant guide, internal refrigerant flow path (refrigerant circulation path), 48 skirt portion

Claims

1. A motor comprising: a stator core; a coil wound around the stator core; a neutral point bus bar connected to the coil; a bus bar holder for holding the neutral point bus bar; and the bus bar holder includes at least one refrigerant flow path capable of receiving the refrigerant of the motor and supplying it toward the coil end exposed from the stator core. The motor.

2. The motor according to claim 1, wherein the at least one refrigerant flow path includes an open refrigerant guide for guiding the refrigerant toward the coil end.

3. The motor according to claim 1, wherein the at least one 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.

4. The motor according to claim 1, further comprising at least one refrigerant supply flow path for supplying the refrigerant to the at least one refrigerant flow path.

5. The at least one refrigerant flow path includes an open refrigerant guide for guiding the refrigerant toward the coil end, and the at least one refrigerant supply flow path communicates with the refrigerant guide so that the refrigerant can flow therethrough or discharges the refrigerant into the refrigerant guide. The motor according to claim 4.

6. The at least one refrigerant supply flow path is disposed at a distance from the bus bar holder, and the at least one refrigerant guide is configured to receive the refrigerant discharged from the at least one refrigerant supply flow path. The motor according to claim 5.

7. The at least one 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, and the at least one refrigerant supply flow path communicates with the internal refrigerant flow path so that the refrigerant can flow therethrough or discharges the refrigerant into the refrigerant intake hole of the internal refrigerant flow path. The motor according to claim 4.

8. The motor according to claim 1, wherein the bus bar holder further has at least one skirt portion extending toward the coil end so as to be able to supply the refrigerant that has passed through the refrigerant flow path to the coil end.

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

10. The at least one refrigerant supply passage is disposed on the outer periphery of the stator core, and the motor according to any one of claims 4 to 9.

11. The at least one refrigerant supply passage penetrates the inside of the stator core, and the motor according to any one of claims 4 to 9.

Images