Axial gap motor

Abstract

To provide an axial gap motor with improved cooling performance.SOLUTION: An axial gap motor comprises: a shaft extending along a central axis; a rotor fixed on the outside of the shaft in the radial direction; a stator located through an air gap in the axial direction of the rotor; a stator case for accommodating the stator; and a bracket, at least a part of which is located on one side of the stator in the axial direction. The stator case includes a first flow path in which coolant flows for cooling the stator. The bracket includes a second flow path in which the coolant from the first flow path flows.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an axial gap motor. [Background technology]

[0002] Axial gap motors are known that have a stator and a rotor that axially correspond to each other. It is known that the stator in such axial gap motors generates heat. Patent Document 1 discloses a configuration in which a cooling medium is directly supplied to the stator to cool the stator. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-163373 Summary of the Invention [Problem to be solved by the invention]

[0004] However, Patent Document 1 only discloses a configuration for discharging the cooling medium supplied to the stator, and in order to cool the cooling medium whose temperature has risen due to the heat of the stator, measures such as providing an external cooler for cooling the cooling medium are required, which poses the problem of increasing the size of the system using the axial gap motor.For this reason, there has been room for improvement in the cooling of axial gap motors.

[0005] An object of the present invention is to provide an axial gap motor with improved cooling. [Means for solving the problem]

[0006] An axial gap motor according to one aspect of the present invention includes a shaft extending along a central axis, a rotor fixed to the radially outer side of the shaft, a stator arranged in the axial direction of the rotor via an air gap, a stator case that houses the stator, and a bracket at least a portion of which is arranged on one axial side of the stator, and the stator case is (The lower side when the central axis extends horizontally) a lower region that accommodates the stator and an upper region that accommodates the stator; (Upper side when the central axis extends horizontally) a partition plate that separates the inside of the stator case into an upper area that accommodates the bracket, the stator case having a first flow path through which coolant flows in the lower area, the bracket having a second flow path through which coolant from the first flow path flows, and the stator case having a third flow path through which coolant from the second flow path flows in the upper area. In one aspect of the axial gap motor described above, the stator case has a first inlet through which coolant flows into the lower region from the lower side of the stator, a first outlet through which coolant in the lower region flows out from the radially inner side of the stator, a second inlet through which coolant flows into the upper region from the radially inner side of the stator, and a second outlet through which coolant in the upper region flows out from the upper side of the stator.

[0007] In the axial gap motor according to the above aspect, the rotor rotates together with the rotor, Outside air The fan has blades that blow air toward the second flow path.

[0009] In the axial gap motor according to one aspect of the present invention, the rotor is a first rotor disposed on one axial side of the stator, and is fixed to the radially outer side of the shaft. Other axial side The rotor further includes a second rotor disposed on the

[0010] In one aspect of the axial gap motor described above, the bracket is a first bracket that covers the first rotor from one axial side, and further includes a second bracket that covers the second rotor from the other axial side, and the second bracket has a fourth flow path through which coolant from the third flow path flows. [Effects of the Invention]

[0011] According to one aspect of the present invention, it is possible to provide an axial gap motor with improved cooling. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a perspective view of a motor according to a first embodiment of the present invention. [Figure 2] 2 is a side cross-sectional view of the motor 100 of FIG. 1 taken along a plane passing through the center axis J and perpendicular to the X axis. [Figure 3] 2 is a perspective view showing the motor 100 of FIG. 1 with a bracket 110 removed. FIG. [Figure 4] FIG. 10 is a side view of the bracket 110 as seen from the -Z side. [Figure 5] 3 is a cross-sectional view taken along the line AA in FIG. 2. [Figure 6] 3 is a cross-sectional view of FIG. 2 taken along line B-B. [Figure 7] 3 is a cross-sectional view taken along CC in FIG. 2. [Figure 8] 2 is a side view of the motor 100 of FIG. 1 with a bracket 120 removed, as viewed from the other axial side. [Figure 9] FIG. 10 is a side view of the bracket 120 as seen from the +Z side. [Figure 10] FIG. 3 is a cross-sectional view taken along the line DD in FIG. 2. [Figure 11] FIG. 10 is a perspective view of a motor according to a second embodiment of the present invention. [Figure 12] 12 is a side cross-sectional view of the motor 500 of FIG. 11 taken along a plane passing through the central axis S and perpendicular to the X-axis. FIG. [Figure 13] FIG. 10 is a side view of the bracket 510 as seen from the -Z side. [Figure 14]12 is a side view of the motor 500 of FIG. 11 with the bracket 510 removed, as viewed from the +Z side. [Figure 15] 13 is a cross-sectional view of FIG. 12 taken along the line E-E. [Figure 16] FIG. 13 is a cross-sectional view of FIG. 12 taken along the line F-F. DETAILED DESCRIPTION OF THE INVENTION

[0013] An axial gap motor according to an embodiment of the present invention will be described below with reference to the drawings. Note that in the drawings, the scale and number of components may differ from the actual structure in order to make each component easier to understand.

[0014] In addition, in the drawings, an XYZ coordinate system is shown as a three-dimensional Cartesian coordinate system as appropriate. In the XYZ coordinate system, the Z axis direction is parallel to the axis of the central axis J shown in Figure 1. The Y axis direction is the radial direction relative to the central axis J, which is the up-down direction in Figure 1. The X axis direction is perpendicular to both the Z axis direction and the Y axis direction. In each of the X axis direction, the side indicated by the arrow in the drawing is the positive side, and the opposite side is the negative side.

[0015] In the following description, the positive side (+Z side) in the Z-axis direction will be referred to as "one side," and the negative side (-Z side) in the Z-axis direction will be referred to as "the other side." Note that "one side" and "the other side" are names used merely for the purpose of explanation and do not limit the actual positional relationship or direction. Furthermore, unless otherwise specified, the direction parallel to the central axis J (Z-axis direction) will be referred to simply as "axial direction," the radial direction centered on the central axis J will be referred to simply as "radial direction," and the circumferential direction centered on the central axis J, i.e., around the axis of the central axis J, will be referred to simply as "circumferential direction." The side approaching the central axis J in the radial direction will be referred to as "radially inner," and the side away from the central axis J will be referred to as "radially outer."

[0016] In this specification, "extending in the axial direction" includes not only extending strictly in the axial direction (Z-axis direction) but also extending in a direction tilted by less than 45° with respect to the axial direction. In addition, in this specification, "extending in the radial direction" includes not only extending strictly in the radial direction, i.e., in a direction perpendicular to the axial direction (Z-axis direction), but also extending in a direction tilted by less than 45° with respect to the radial direction. Furthermore, "parallel" includes not only being strictly parallel but also being tilted by an angle of less than 45° with respect to each other. [Example]

[0017] Fig. 1 is a perspective view of a motor according to a first embodiment of the present invention. The motor 100 in Fig. 1 is an example of an axial gap motor. Fig. 2 is a side cross-sectional view of the motor 100 in Fig. 1 taken along a plane that passes through the central axis J and is perpendicular to the X axis.

[0018] The motor 100 includes a shaft 200 extending along a central axis J, a rotor 140 fixed to the radially outer side of the shaft 200, a rotor 150 fixed to the radially outer side of the shaft 200, and a stator 160. The rotor 140 is disposed on one axial side of the stator 160 via an air gap. The rotor 150 is disposed on the other axial side of the stator 160 via an air gap. In this embodiment, an example in which rotors are provided on both axial sides of the stator will be described, but the present invention is also applicable to a configuration in which rotors are provided on only one axial side of the stator. The shaft 200 is supported by bearings 171 and 172 so as to be rotatable about the central axis J.

[0019] The stator 160 has a stator core 162 (see FIG. 5) and a stator coil 161 wound around the stator core 162. The stator 160 is configured by arranging a plurality of stator cores 162 and a plurality of stator coils 161 in the circumferential direction. In this embodiment, the stator 160 is configured by arranging 12 stator cores 162 and stator coils 161 in the circumferential direction. The stator core 162 is configured by laminated steel plates in which electromagnetic steel plates are laminated in the radial direction.

[0020] The stator 160 is housed in a stator case 130. The stator case 130 has a housing portion 130a and a plate-shaped lid portion 130b having a surface perpendicular to the axial direction. The housing portion 130a has a plate-shaped bottom portion 130c having a surface perpendicular to the axial direction, a cylindrical portion 130d extending from the bottom portion 130c to one side in the axial direction, and a cylindrical portion 130e having a larger diameter than the cylindrical portion 130d and extending from the bottom portion 130c to one side in the axial direction. The bottom portion 130c has a surface perpendicular to the axial direction between the cylindrical portions 130d and 130e. The cylindrical portions 130d and 130e are coaxial. The stator case 130 houses the stator 160 in an area surrounded by the cylindrical portions 130d, 130e, and the bottom portion 130c. Lid portion 130b has a surface perpendicular to the axial direction between cylindrical portions 130d and 130e. Lid portion 130b closes an opening on one axial side of an area surrounded by cylindrical portions 130d, 130e, and bottom portion 130c. Lid portion 130b is fixed to cylindrical portion 130e with, for example, bolts.

[0021] The area surrounded by the lid portion 130b, the cylindrical portion 130d, the cylindrical portion 130e, and the bottom portion 130c of the stator case 130 is partitioned into an upper side (hereinafter referred to as the "upper area") and a lower side (hereinafter referred to as the "lower area") by a partition plate 130g (see FIG. 7) and a partition plate 130f (see FIG. 7). The stator case 130 has an inlet 131 through which oil flows in from the outside. The oil from the inlet 131 flows into the lower area and cools the stator core 162 and the stator coil 161 housed in this lower area.

[0022] Cylindrical portion 130d has flow path 132a extending from the other axial side to one axial side and opening to one axial side. Cover portion 130b has flow path 133a connecting to the opening on one axial side of flow path 132a and extending radially outward. Cover portion 130b has flow path 134a connecting to flow path 133a, extending to one axial side, and opening to one axial side.

[0023] The cylindrical portion 130d has a flow path 132b that extends from the other axial side to one axial side and opens to the one axial side. The lid portion 130b has a flow path 133b that is connected to the opening on the one axial side of the flow path 132b and extends radially outward. The lid portion 130b has a flow path 134b that is connected to the flow path 133b, extends to one axial side, and opens to the one axial side. The bottom portion 130c has a flow path 135 that extends from the one axial side to the other axial side and opens to both the one axial side and the other axial side.

[0024] The rotor 140 has a rotor core 141 and a plurality of rotor magnets 142 arranged in the circumferential direction. The rotor core 141 has the rotor magnets 142 fixed to the surface on the other axial side, and has blade portions 141a on one axial side.

[0025] The rotor 150 has a rotor core 151 and a plurality of rotor magnets 152 arranged in the circumferential direction. The rotor core 151 has the rotor magnets 152 fixed to a surface on one axial side, and has blade portions 151a on the other axial side.

[0026] At least a portion of the bracket 110 is disposed on one axial side of the stator 160. A portion of the bracket 110 may be located on the other axial side of the portion of the stator 160. The bracket 110 has a cylindrical shape with a bottom and covers the rotor 140 from one axial side. The bracket 110 is coaxial with the cylindrical portion 130e. The bracket 110 has a cylindrical portion 110a and a bottom portion 110c. The bottom portion 110c has a surface perpendicular to the axial direction. The cylindrical portion 110a has a cylindrical shape extending from the bottom portion 110c to the other axial side.

[0027] The bottom portion 110c has a through-hole 110k penetrating one axial side and the other axial side, and a hole 110m communicating with the through-hole 110k on the one axial side and penetrating to the other axial side. The hole 110m has a larger diameter than the through-hole 110k. The bearing 171 fits into the hole 110m and is fixed at a stepped position caused by the difference in diameter between the hole 110m and the through-hole 110k.

[0028] The cylindrical portion 110a has a plurality of through holes 110b extending radially in the circumferential direction. The bottom portion 110c has an outer peripheral portion 110f extending around the entire circumferential circumference on the outer circumferential side, an inner peripheral portion 110h extending around the entire circumferential circumference radially inward from the outer peripheral portion 110f, a central portion 110i extending radially inward from the inner peripheral portion 110h and having through holes 110k and 110m, and a plurality of radial portions 110g arranged circumferentially and radially connecting the outer peripheral portion 110f to the central portion 110i. The bottom portion 110c is surrounded by the outer peripheral portion 110f, the radial portions 110g, and the inner peripheral portion 110h and has a through hole 110d extending axially. The bottom portion 110c is surrounded by the inner peripheral portion 110h, the radial portions 110g, and the central portion 110i and has a through hole 110e extending axially.

[0029] The bracket 110 has a flow path 111a that is connected to the flow path 134a at the other axial end and extends to one axial side, and a flow path 112a that is connected to the one axial end of the flow path 111a at the radially outer end and extends radially inward.

[0030] The bracket 110 has a flow path 111b that communicates with the flow path 134b at the other axial end and extends to one axial side, and a flow path 112b that communicates with the one axial end of the flow path 111b at the radially outer end and extends radially inward.

[0031] At least a portion of bracket 120 is disposed on the other axial side of stator 160. A portion of bracket 120 may be located on one axial side of a portion of stator 160. Bracket 120 has a cylindrical shape with a bottom and covers rotor 150 from one axial side. Bracket 120 is coaxial with cylindrical portion 130e. Bracket 120 has cylindrical portion 120a and bottom portion 120c. Bottom portion 120c has a surface perpendicular to the axial direction. Cylindrical portion 120a has a cylindrical shape extending from bottom portion 120c to one axial side. Bracket 120 has the same shape as bracket 110 unless otherwise specified.

[0032] Bracket 120 has a flow path 123 that communicates with flow path 135 at one axial end and extends to the other axial side, and a flow path 122b that communicates with the other axial end of flow path 123 at its radially outer end and extends radially inward. Bracket 120 has an outlet 121 through which oil flows out to the outside. Bracket 120 has flow path 122a. Flow path 122a extends from the radially inner side to the radially outer side and opens radially outward. Flow path 122a communicates with outlet 121.

[0033] Fig. 3 is a perspective view showing motor 100 of Fig. 1 with bracket 110 removed. Wings 141a provided on one axial surface of rotor core 141 blow air toward an oil flow path provided in bracket 110 as rotor 140 rotates, cooling the oil flowing within the flow path. Flow paths 134a and 134b open on one axial surface of lid 130b.

[0034] 4 is a side view of bracket 110 as viewed from the -Z side. Flow paths 111a and 111b open on the other axial surface of bracket 110. Flow path 111a communicates with flow path 134a in lid portion 130b. Flow path 111b communicates with flow path 134b in lid portion 130b.

[0035] Fig. 5 is a cross-sectional view taken along the line AA in Fig. 2. That is, Fig. 5 is a cross-sectional view taken at the positions of the flow paths 112a and 112b. The bracket 110 has the flow paths 112a, 112b, 114, 115, and 116 in the bottom portion 110c.

[0036] Flow path 114 is a flow path that extends around the entire circumferential circumference of outer peripheral portion 110f. Flow path 116 is a flow path that extends around the entire circumferential circumference of inner peripheral portion 110h. Flow path 112a and flow path 112b are flow paths that pass through radial portions 110g that extend along the Y axis and are in communication with flow path 114 and flow path 116. Flow path 115 is a flow path that passes through all of the radial portions 110g except those that extend along the Y axis and is in communication with flow path 114 and flow path 116. Oil dissipates heat by flowing through flow path 112a, flow path 112b, flow path 114, flow path 115, and flow path 116. In addition, the bracket 110 is cooled by the air blown by blade portion 141a, which can further cool the oil flowing through flow path 112a, flow path 112b, flow path 114, flow path 115, and flow path 116.

[0037] Fig. 6 is a cross-sectional view taken along the line BB in Fig. 2. That is, Fig. 6 is a cross-sectional view taken at the positions of flow channels 133a and 133b in lid portion 130b. Lid portion 130b has flow channels 133a and 133b extending along the Y axis.

[0038] Fig. 7 is a cross-sectional view taken along CC line in Fig. 2. That is, Fig. 7 is a cross-sectional view taken at the other axial end of the flow paths 132a and 132b of the cylindrical portion 130d.

[0039] The cylindrical portion 130d has flow passages 136a and 137a that open radially outward below the partition plates 130g and 130f. The cylindrical portion 130d has a flow passage 138a whose one circumferential end communicates with the radially inner end of the flow passage 136a and whose other circumferential end communicates with the radially inner end of the flow passage 137a. The flow passage 138a communicates with the other axial end of the flow passage 132a.

[0040] As described above, the region surrounded by the lid portion 130b, the cylindrical portion 130d, the cylindrical portion 130e, and the bottom portion 130c of the stator case 130 is divided into an upper region and a lower region by the partition plates 130g and 130f. The lower region is filled with oil flowing in from the inlet 131. As a result, the stator core 162 and the stator coil 161 housed in the lower region are cooled by the oil. Furthermore, when the lower region is filled with oil, oil flows into the cylindrical portion 130d from the radially outer ends of the flow paths 136b and 137b.

[0041] The cylindrical portion 130d has flow passages 136b and 137b that open radially outward above the partition plates 130g and 130f. The cylindrical portion 130d has a flow passage 138b whose one circumferential end communicates with the radially inner end of the flow passage 136b and whose other circumferential end communicates with the radially inner end of the flow passage 137b. The flow passage 138b communicates with the other axial end of the flow passage 132b.

[0042] The oil that has flowed from flow path 132b to flow path 138b flows out from the radially outer ends of flow paths 136b and 137b and flows into the upper region. When the upper region is filled with oil, the oil cools stator core 162 and stator coil 161 housed in the upper region. When the upper region is filled with oil, the oil flows from flow path 135 to the other axial side.

[0043] Fig. 8 is a side view seen from the other axial side with bracket 120 removed from motor 100 in Fig. 1. Flow path 135 extends to the other axial side within bottom portion 130c and opens to the other axial side.

[0044] 9 is a side view of the bracket 120 as viewed from the +Z side. The other axial end of the flow path 135 communicates with one axial end of the flow path 123 of the bracket 120.

[0045] Fig. 10 is a cross-sectional view taken along the line DD in Fig. 2. That is, Fig. 10 is a cross-sectional view taken at the positions of flow paths 122a and 122b. Bracket 120 has flow paths 122a, 122b, 124, 125, and 126 in bottom portion 120c.

[0046] Flow path 124 is a flow path that extends around the entire circumferential circumference within the outer periphery of bottom portion 120c. Flow path 126 is a flow path that extends around the entire circumferential circumference within the inner periphery of bottom portion 120c. Flow paths 122a and 122b are flow paths that pass through radial portions of bottom portion 120c extending along the Y axis and are connected to flow paths 124 and 126. Flow path 125 is a flow path that passes through all of the radial portions other than those that extend along the Y axis and is connected to flow paths 124 and 126. Oil dissipates heat by flowing through flow paths 122a, 122b, 124, 125, and 126. In addition, the bracket 120 is cooled by the air blown by wing portion 151a, which further cools the oil flowing through flow paths 122a, 122b, 124, 125, and 126.

[0047] In this embodiment, as described above, the oil flows in the following order: inlet 131, the lower side of stator case 130, bracket 110, the upper side of stator case 130, bracket 120, and outlet 121. In this embodiment, if outlet 121 and inlet 131 are connected via a pump, oil cooled by bracket 120 is supplied to the lower side of stator case 130, and oil cooled by bracket 110 is supplied to the upper side of stator case 130, so that stator 160 can be cooled without the need for an external cooler or the like to cool the oil. [Example]

[0048] Next, a second embodiment of the present invention will be described. In the drawings of the second embodiment, an XYZ coordinate system is appropriately shown as a three-dimensional Cartesian coordinate system. In the XYZ coordinate system, the Z axis direction is a direction parallel to the axial direction of the central axis S shown in FIG. 11. The Y axis direction is a radial direction relative to the central axis S, which is the up-down direction in FIG. 11. The X axis direction is a direction perpendicular to both the Z axis direction and the Y axis direction. In each of the X axis direction, the Y axis direction, and the Z axis direction, the side indicated by the arrow shown in the drawing is the + side, and the opposite side is the - side.

[0049] In the following description, the positive side (+Z side) in the Z-axis direction will be referred to as "one side," and the negative side (-Z side) in the Z-axis direction will be referred to as "the other side." Note that "one side" and "the other side" are names used merely for the purpose of explanation and do not limit the actual positional relationship or direction. Furthermore, unless otherwise specified, the direction parallel to the central axis S (Z-axis direction) will be referred to simply as "axial direction," the radial direction centered on the central axis J will be referred to simply as "radial direction," and the circumferential direction centered on the central axis S, i.e., around the axis of the central axis J, will be referred to simply as "circumferential direction." The side in the radial direction approaching the central axis S will be referred to as "radially inner," and the side away from the central axis S will be referred to as "radially outer."

[0050] Second Embodiment Fig. 11 is a perspective view of a motor according to a second embodiment of the present invention. A motor 500 in Fig. 11 is an example of an axial gap motor. Fig. 12 is a side cross-sectional view of the motor 500 in Fig. 11 cut along a plane that passes through the central axis S and is perpendicular to the X-axis. In the second embodiment, a description of the same configuration as in the first embodiment will be omitted.

[0051] Motor 100 includes a shaft 700 extending along central axis S, a rotor 540 fixed to the radially outer side of shaft 700, a rotor 550 fixed to the radially outer side of shaft 700, and a stator 560. Rotor 540 is disposed on one axial side of stator 560 via an air gap. Rotor 550 is disposed on the other axial side of stator 560 via an air gap.

[0052] Stator 560 is housed in stator case 530. Stator case 530 is divided into an upper region and a lower region by partition plate 530g (see FIG. 16) and partition plate 530f (see FIG. 16). Stator case 530 has inlet 531b through which oil flows in from the outside. The oil from inlet 531b flows into the lower region and cools the stator core and stator coil housed in this lower region. Stator case 530 has outlet 531a through which oil flows out to the outside.

[0053] Rotor 540 has blade portion 541a on one axial side. Rotor 550 has rotor core 551 and multiple rotor magnets 552 arranged in the circumferential direction. Rotor core 551 has rotor magnets 152 fixed to a surface on one axial side, and has blade portion 560 on the radially outer side.

[0054] 13 is a side view of bracket 510 as viewed from the -Z side. Bracket 510 has a cylindrical shape with a bottom and covers rotor 540 from one axial side. Flow paths 511a and 511b open to the surface on the other axial side of bracket 510. Bracket 510 has the same structure as bracket 110 of Example 1.

[0055] 14 is a side view of motor 500 in FIG. 11 with bracket 510 removed, viewed from the +Z side. Blade portion 141a blows air toward an oil flow path provided in bracket 510 as rotor 540 rotates, cooling the oil flowing within the flow path. Flow path 534a and flow path 534b open on one axial side surface of stator case 530. Flow path 534a communicates with flow path 511a of bracket 510. Flow path 534b communicates with flow path 511b of bracket 510.

[0056] Fig. 15 is an E-E cross-sectional view of Fig. 12. The bracket 510 has a flow path 524 which corresponds to the flow paths 112a, 112b, 114, 115 and 116 of the first embodiment.

[0057] Fig. 16 is a cross-sectional view taken along the line FF of Fig. 12. Stator case 530 has partition plates 530g and 530f, and forms an upper region and a lower air region.

[0058] In this embodiment, the oil flows in the following order: inlet 531b, a lower region of stator case 530, bracket 510, an upper region of stator case 530, and outlet 531a. In this embodiment, if outlet 531a and inlet 531b are connected via a pump, oil cooled by bracket 510 is supplied to stator case 530, and therefore stator 560 can be cooled without the need for an external cooler or the like to cool the oil.

[0059] The present invention is not limited to the above-described embodiments, and various improvements and design changes may be made without departing from the spirit of the present invention. In addition, the embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0060] 100...motor, 110...bracket, 120...bracket, 130...stator case

Claims

1. a shaft extending along a central axis; a rotor fixed to the radially outer side of the shaft; a stator disposed in the axial direction of the rotor via an air gap; a stator case that houses the stator; a bracket at least a portion of which is disposed on one axial side of the stator; Equipped with the stator case has a partition plate that separates the interior of the stator case into a lower region that accommodates a lower side of the stator (a lower side when the central axis extends horizontally) and an upper region that accommodates an upper side of the stator (an upper side when the central axis extends horizontally), the stator case has a first flow path through which a coolant flows in the lower region; the bracket has a second flow passage through which the coolant from the first flow passage flows; The stator case has a third flow path through which the coolant from the second flow path flows through the upper region. Axial gap type motor.

2. The stator case has a first inlet through which the coolant flows into the lower region from below the stator, a first outlet through which the coolant in the lower region flows out from a radially inner side of the stator, a second inlet through which the coolant flows into the upper region from the radially inner side of the stator, and a second outlet through which the coolant in the upper region flows out from an upper side of the stator.

2. The axial gap motor according to claim 1.

3. The rotor has a blade portion that rotates together with the rotor and blows outside air toward the second flow path.

3. An axial gap motor according to claim 1 or 2.

4. the rotor is a first rotor arranged on one axial side of the stator, a second rotor fixed to the radially outer side of the shaft and disposed on the other axial side of the stator; 3. An axial gap motor according to claim 1 or 2.

5. the bracket is a first bracket that covers the first rotor from one axial side, a second bracket that covers the second rotor from the other axial side; The second bracket has a fourth flow path through which the coolant from the third flow path flows.

5. The axial gap motor according to claim 4.

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