CN111919368A - Motor with a stator having a stator core - Google Patents
Motor with a stator having a stator core Download PDFInfo
- Publication number
- CN111919368A CN111919368A CN201980022567.XA CN201980022567A CN111919368A CN 111919368 A CN111919368 A CN 111919368A CN 201980022567 A CN201980022567 A CN 201980022567A CN 111919368 A CN111919368 A CN 111919368A
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- CN
- China
- Prior art keywords
- stator
- flow path
- motor
- outer peripheral
- teeth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
Abstract
A motor is provided with: a rotor having a shaft extending in a vertical direction; a stator located radially outward of the rotor; and a housing accommodating the stator. The stator has a core back, a plurality of teeth extending radially inward from the core back, and coils wound around the teeth. A sealed chamber in which a cooling medium is sealed is provided between the housing and the rotor. The sealed chamber has a plurality of outer peripheral side flow paths extending in the vertical direction between the core back and the casing in the radial direction.
Description
Technical Field
The present invention relates to a motor.
Background
Conventionally, a motor is known which is provided with a cooling mechanism for realizing high-load and long-time driving. Patent document 1 discloses a structure in which a cooling liquid is directly circulated to a coil to cool a motor.
Documents of the prior art
Patent document
Patent document 1: japanese patent No. 5962570
Disclosure of Invention
Problems to be solved by the invention
In the motor, an external pump is required to circulate the coolant inside the motor. Therefore, there is a problem that the entire system including the motor and the cooling device is large.
An object of the present invention is to provide a motor having improved cooling efficiency without using an external pump.
Means for solving the problems
A motor according to one embodiment of the present invention includes: a rotor having a shaft extending in a vertical direction; a stator located radially outside the rotor; and a housing accommodating the stator. The stator includes a core back, a plurality of teeth extending radially inward from the core back, and a coil wound around the teeth. A sealed chamber in which a cooling medium is sealed is provided between the housing and the rotor. The sealed chamber has a plurality of outer peripheral side flow paths extending in the vertical direction between the core back and the housing in the radial direction.
Effects of the invention
According to the aspect of the present invention, a motor having improved cooling efficiency without using an external pump can be provided.
Drawings
Fig. 1 is a sectional view of a rotary wing device including a motor according to an embodiment.
Fig. 2 is a perspective view showing a motor according to the embodiment with a cover member removed.
Fig. 3 is a perspective view of the stator holding member.
Fig. 4 is a perspective view of the seal member.
Fig. 5 is a partial sectional view of the motor showing the arrangement of the flow paths.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the following description, a vertical direction in which the center axis J shown in fig. 1 extends is referred to as a vertical direction. One axial side of the center axis J is simply referred to as "upper side", and the other axial side is simply referred to as "lower side". The vertical direction is a name used for explanation only, and the actual positional relationship and direction are not limited. The direction parallel to the central axis J is simply referred to as the "axial direction", the radial direction about the central axis J is simply referred to as the "radial direction", and the circumferential direction about the central axis J is simply referred to as the "circumferential direction".
In the present specification, the term "extend in the axial direction" means a case of extending strictly in the axial direction, and includes a case of extending in a direction inclined in a range of less than 45 ° with respect to the axial direction. The term "extending in the radial direction" means not only the case of extending strictly in the radial direction, i.e., in the direction perpendicular to the axial direction, but also the case of extending in a direction inclined by less than 45 ° with respect to the radial direction.
As shown in fig. 1, the rotary wing device 1 includes a motor 10, a propeller 2, and a fan 75. The rotary-wing apparatus 1 can be used as a rotary-wing apparatus of a drone, for example. In the present embodiment, the fan 75 is a centrifugal fan.
The motor 10 includes a housing 11, bearings 23 and 24, a rotor 20, a stator 30, a circuit board 80, and a circuit board case 85.
The housing 11 has: a cylindrical stator holding member 12 having a bottom wall portion 12a and opening on the upper side; a cover member 13 connected to an upper end of the stator holding member 12; and a seal member 14 located on an inner peripheral portion of the stator 30. The stator holding member 12 has a bearing holding portion 12b at a central portion of the bottom wall portion 12a as viewed in the axial direction. The bearing 23 is disposed inside the bearing holding portion 12 b. In the present embodiment, the bearing holding portion 12b has a plurality of through holes 12c that penetrate the bearing holding portion 12b in the axial direction.
The cover member 13 is fixed to an upper opening of the stator holding member 12. The cover member 13 has a bearing holding portion 13 a. The cover member 13 holds the bearing 24 in the bearing holding portion 13 a. In the present embodiment, the bearing holding portion 13a has a plurality of through holes 13b that penetrate the bearing holding portion 13a in the axial direction. The rotor 20 and the stator 30 are accommodated in an inner space surrounded by the stator holding member 12 and the cover member 13.
The rotor 20 has a shaft 21 and a rotor body 22. The shaft 21 is disposed along the center axis J. The shaft 21 is a cylindrical shape centered on the central axis J. The shaft 21 is supported by bearings 23 and 24 to be rotatable about the central axis J. The upper end of the shaft 21 protrudes upward from the bearing 24. The fan 75 and the propeller 2 are fixed to the tip end of the shaft 21 that protrudes above the cover member 13. The rotor body 22 includes a rotor core fixed to the outer peripheral surface of the shaft 21 and a rotor magnet fixed to the outer peripheral surface of the rotor core.
The stator 30 is radially opposed to the rotor 20 with a gap therebetween. The stator 30 has a stator core 31 and a plurality of coils 35. The stator core 31 is annular and surrounds the rotor body 22 radially outside the rotor body 22. The stator core 31 has a core back 32 and a plurality of teeth 33. The core back 32 has a circular ring shape centered on the central axis J. The teeth 33 protrude radially inward from the core back 32. The plurality of teeth 33 are arranged at equal intervals along the circumferential direction.
As shown in fig. 1 to 3, the stator core 31 has a plurality of first groove portions 32a extending in the axial direction on the outer peripheral surface of the core back 32. The first groove portions 32a are recessed radially inward from the outer peripheral surface of the core back 32. The housing 11 has a plurality of second grooves 11a extending in the axial direction on the inner circumferential surface of the stator holding member 12. The plurality of second grooves 11a are recessed radially outward from the inner circumferential surface of the stator holding member 12. The first groove portion 32a and the second groove portion 11a are provided to be opposed to each other in the radial direction. The housing 11 has a plurality of outer peripheral side flow passages 41 each formed by the first groove 32a and the second groove 11 a.
The outer peripheral side flow path 41 is disposed at a position overlapping the teeth 33 as viewed in the radial direction. I.e. radially outside the teeth 33. Even if the first groove 32a constituting the outer peripheral side flow passage 41 is provided in the outer peripheral surface of the stator core 31 located radially outside the teeth 33, the width through which the magnetic lines of force pass is less likely to be narrowed. Therefore, the influence on the magnetic characteristics due to the provision of the outer peripheral side flow path 41 can be suppressed. Further, since the distance between the outer peripheral side flow passage 41 and the coil 35 in the radial direction is short, the coil 35 is easily cooled.
In the present embodiment, since the outer peripheral side flow channel 41 is constituted by the first groove 32a and the second groove 11a, the depth of the first groove 32a of the core back 32 can be made smaller than in the case where the outer peripheral side flow channel 41 is provided only in the core back 32. This can further reduce the influence on the magnetic characteristics due to the provision of the outer peripheral side flow path 41. Further, since the second groove 11a is provided, the outer peripheral side flow path 41 is disposed at a position closer to the outside air, and thus the cooling medium flowing inside is easily cooled. The outer peripheral side flow channel 41 may be constituted by only one of the first groove 32a and the second groove 11 a.
As shown in fig. 3, the stator holding member 12 has a plurality of step portions 121 that support the stator 30 from below on the inner wall surface of the stator holding member 12. The upper surfaces of the plurality of step portions 121 contact the lower surface of the core back 32. The height positions of the plurality of step portions 121 in the vertical direction are the same. In the case of the present embodiment, the step portion 121 supports the core back 32 of the stator core 31 from below. The plurality of step portions 121 are located between the two outer peripheral side flow paths in the circumferential direction. According to this configuration, even in the motor 10 including the outer peripheral side flow passage 41, the step portion 121 can perform positioning in the axial direction of the stator 30.
The housing 11 has a seal member 14 located radially inward of the core back 32. The seal member 14 covers at least the opening 33b between the adjacent teeth 33 facing the inside in the radial direction of the stator 30. As shown in fig. 1, 2, and 4, the seal member 14 includes: a plurality of column portions 14a extending in the vertical direction at the inner peripheral end of the stator 30; an upper annular portion 14b connected to upper ends of the plurality of column portions 14 a; and a lower annular portion 14c connected to lower ends of the plurality of column portions 14 a. The upper annular portion 14b and the lower annular portion 14c are annular with the center axis J as the center. The plurality of pillar portions 14a are located between adjacent teeth 33 in the circumferential direction. The rotor 20 is disposed radially inward of the seal member 14.
In the present embodiment, the seal member 14 includes two members, i.e., a first member including the column portion 14a and the upper annular portion 14b and a second member including the lower annular portion 14 c. The column portion 14a has side surface protrusions 14e protruding from the side surfaces in the circumferential direction and extending in the vertical direction on both side surfaces in the circumferential direction. When the motor 10 is assembled, the column portion 14a is inserted between the teeth 33 from the upper side of the stator core 31. As shown in fig. 5, the side surface protrusions 14e of the column part 14a are inserted into the groove parts 33a at the distal end parts of the surfaces of the teeth 33 facing in the circumferential direction. The contact surface between the post portion 14a and the tooth 33 is sealed at the fitting portion between the side surface protrusion portion 14e and the groove portion 33 a.
In the present embodiment, the seal member 14 does not cover the radially inward end surface of the teeth 33, and therefore the radial distance between the rotor 20 and the stator 30 can be reduced. This can increase the torque of the motor 10.
A lower annular portion 14c is press-fitted or adhesively fixed to a lower end portion of the column portion 14 a. The lower annular portion 14c is fixed to the upper surface of the bottom wall portion 12a of the stator holding member 12. The bottom wall portion 12a has a tube portion 12f extending upward from the upper surface of the bottom wall portion 12 a. The cylindrical portion 12f is cylindrical with the center axis J as the center. As shown in fig. 1, the lower annular portion 14c is fixed to the inner peripheral side of the tube portion 12f by press fitting or bonding. In the fitting portion between the cylindrical portion 12f and the lower annular portion 14c, the contact surface between the bottom wall portion 12a and the lower annular portion 14c is sealed.
As shown in fig. 1, the upper surface of the upper annular portion 14b of the seal member 14 is bonded to the lower surface of the lid member 13. Thereby, the radially inner region of the seal member 14 and the radially outer region of the seal member 14 are sealed at the upper portion of the stator 30.
As shown in fig. 5, the pillar portion 14a has a projection portion 14d projecting radially outward from a radially outward side surface of the pillar portion 14 a. In the present embodiment, the protrusion 14d has a triangular shape as viewed in the axial direction, and has a triangular prism shape extending in the vertical direction as a whole. The projection 14d has a corner facing radially outward. By having the projection portion 14d, the surface area of the radially outward surface of the column portion 14a is increased. This increases the contact area between the pillar portion 14a and the cooling medium, thereby improving heat dissipation to the cooling medium. In the present embodiment, a part of the coil 35 is disposed on both sides of the projection 14d in the circumferential direction. The circumferential intervals of the distal end portions of the teeth 33 are narrowed, and therefore, the adjacent coils 35 easily contact with each other, but in the present embodiment, the contact between the coils 35 is hardly generated by the protrusion portions 14 d.
The motor 10 includes an inner peripheral flow passage 42 surrounded by the adjacent teeth 33 of the stator 30 and the column portion 14a of the seal member 14. That is, the motor 10 has a plurality of inner circumferential side flow paths 42 located between the plurality of teeth 33 in the circumferential direction. The inner peripheral flow passage 42 extends in the axial direction and vertically penetrates the stator 30.
The lid member 13 has an upper flow path 43 formed of a concave portion recessed toward the upper side on the lower surface side of the lid member 13. The upper flow passage 43 is connected to the upper ends of the outer peripheral side flow passages 41 and the upper ends of the inner peripheral side flow passages 42.
The stator holding member 12 has a lower flow passage 44 between the stator 30 and the bottom wall portion 12 a. The lower flow passage 44 is connected to the lower ends of the outer peripheral side flow passages 41 and the lower ends of the inner peripheral side flow passages 42.
The motor 10 has a pressure adjusting device 100 at the bottom of the housing 11.
The pressure adjustment device 100 includes: a cylindrical case 101 extending downward from the outer peripheral surface of the bottom wall 12 a; a sharp portion 102 fixed to an opening portion on a lower side of the case 101; and a pressure adjustment unit 103 disposed inside the casing 101.
The sharp portion 102 includes a plate-shaped base portion 104 extending in the radial direction and a needle member 105 projecting upward from the upper surface of the base portion 104. Base portion 104 is fixed to the opening on the lower side of case portion 101. The base portion 104 has a vent hole 104a that penetrates the base portion 104 in the axial direction.
The pressure adjustment portion 103 is a rubber-or resin-made sheet-like elastic body. The pressure adjustment portion 103 is fixed to the lower side of the case portion 101 with the case portion 101 and the base portion 104 interposed therebetween. The pressure adjustment portion 103 seals the lower opening of the case 101. The planar area of the pressure adjustment portion 103 is larger than the planar area of the opening on the lower side of the case portion 101. The pressure adjustment portion 103 is bent upward from the opening of the case portion 101 and is disposed along the inner surface of the case portion 101. The internal space of the casing 101 sealed by the pressure adjustment portion 103 is the pressure adjustment chamber 46 of the pressure adjustment device 100. In the present embodiment, the pressure adjustment chamber 46 is disposed at a position overlapping the stator 30 as viewed in the axial direction. With this configuration, the pressure adjustment device 100 can be provided without increasing the radial dimension of the housing 11.
The motor 10 has a sealed chamber 40 for containing a cooling medium inside the housing 11. In the present embodiment, the closed chamber 40 includes: a cooling chamber 45 for cooling the stator 30; and a pressure adjustment chamber 46 partitioned by the cooling chamber 45 and the partition wall 12 d. The cooling chamber 45 is constituted by the outer peripheral side flow passage 41, the inner peripheral side flow passage 42, the upper flow passage 43, and the lower flow passage 44, which are coolant flow passages, in the stator holding member 12. The pressure adjustment chamber 46 is provided with a pressure adjustment portion 103, and the cooling chamber 45 and the pressure adjustment chamber 46 are connected via a through hole 12e that penetrates the partition wall 12 d.
The cooling medium sealed in the housing 11 cools the coil 35 while circulating in the cooling chamber 45 of the sealed chamber 40. In the cooling chamber 45, the temperature of the cooling medium in contact with the coil 35 as the heat generation source starts to rise. The cooling medium heated by the coil 35 moves upward through the inner peripheral flow passage 42 and reaches the upper flow passage 43. The cooling medium flows radially outward in the upper flow path 43 while being cooled by contact with the lid member 13. The cooling medium flows into the outer peripheral side flow passage 41 which is opened in a portion radially outward of the upper flow passage 43. The cooling medium is cooled in the outer peripheral side flow passage 41 and moves downward. The cooling medium flows from the outer peripheral side flow passage 41 into the lower flow passage 44. In the lower flow passage 44, the cooling medium moves radially inward and flows into the inner peripheral flow passage 42 opened in the lower flow passage 44. In this way, the cooling medium discharges the heat inside the motor 10 to the cover member 13 and the stator holding member 12 while circulating in the housing 11 by the heat of the coil 35.
According to the motor 10 of the present embodiment, the outer peripheral side flow passage 41 is provided outside the core back 32, so that the contact area between the stator 30 and the cooling medium is increased. This enables the stator 30 to be efficiently cooled by the circulating cooling medium. The outer peripheral side flow path 41 is located immediately inside the stator holding member 12 and passes near the outside air, so the cooling medium is easily cooled. Therefore, the cooling efficiency as a whole is improved.
Further, by circulating the cooling medium as described above, the cooling medium cooled in the outer peripheral side flow passage 41 can be smoothly circulated to the inner peripheral side flow passage 42 through the lower flow passage 44. This makes it easy to supply a low-temperature cooling medium to the coil 35 as a heat generation source, thereby improving cooling efficiency.
The cooling chamber 45 of the present embodiment can enclose the cooling medium around the stator 30 by the stator holding member 12, the lid member 13, and the seal member 14. The sealing structure can be realized using a minimum number of parts, and therefore, the sealing structure can be manufactured easily and at low cost.
In the present embodiment, the top surface 43a of the upper flow path 43 may have an inclined surface portion inclined upward in the vertical direction as it goes outward in the radial direction. When bubbles are generated in the cooling medium, the bubbles reach the top surface 43a of the upper flow path 43 through the inner peripheral flow path 42. Here, when the top surface 43a becomes higher toward the radial outside, the air bubbles are guided to the radial outside. This facilitates the formation of a radially outward flow in the upper flow path 43, thereby making the circulation of the cooling medium smoother.
The pressure adjustment portion 103 of the pressure adjustment device 100 deforms in a range that does not reach the sharp portion 102 during normal operation of the motor 10, and absorbs the volume change of the cooling medium.
On the other hand, when the internal pressure of the cooling medium excessively increases due to abnormal vaporization of the cooling medium, the pressure adjustment portion 103 protrudes further downward than during normal operation, and the convex tip portion of the pressure adjustment portion 103 comes into contact with the needle member 105 of the sharp portion 102. Thereby, the pressure adjustment portion 103 is opened with a hole. The cooling medium is partially discharged from the hole provided in the pressure adjustment portion 103, and the internal pressure of the cooling medium is released. As a result, damage to the motor 10 due to the internal pressure of the cooling medium can be suppressed.
A bus bar holder 50 is disposed on the lower surface of the bottom wall portion 12 a. The bus bar holder 50 holds a plurality of bus bars 51. The bottom wall portion 12a has a through hole 12e that penetrates the bottom wall portion 12a in the axial direction at a position overlapping the bus bar holder 50 as viewed in the axial direction. The lead wires 35a extending from the plurality of coils 35 extend to the bus bar holder 50 through the through holes 12 e. The lead wire 35a is connected to the bus bar 51 in the bus bar holder 50.
The circuit substrate case 85 is fixed to the lower portion of the housing 11. The circuit board case 85 is a tube having a bottom wall and an opening toward the upper side. The circuit board 80 is accommodated in the bottom of the circuit board case 85. The circuit board 80 is a plate-like member extending in the radial direction. The circuit board 80 is connected to the bus bar 51. The circuit board case 85 has a plurality of openings 85a on the side surface. The pressure adjusting means 100 at the bottom of the housing 11 is located at the upper portion of the circuit substrate case 85.
In the rotary-wing apparatus 1 of the present embodiment, the motor 10 rotationally drives the propeller 2 and the fan 75. The fan 75 circulates cooling air inside the motor 10. By the rotation of the fan 75, the air above the motor 10 is blown out radially outward, and the pressure in the vicinity of the bearing 24 radially inward of the fan 75 is reduced. Thereby, the air in the circuit board case 85 under the motor 10 moves from the through hole 12c of the bearing holding portion 12b to the through hole 13b of the bearing holding portion 13a through the periphery of the rotor 20. Therefore, the rotary vane device 1 has the following cooling air flow path: enters through opening 85a of circuit board case 85, passes through the inside of motor 10, and is discharged to the outside of fan 75.
The present invention is described with reference to the drawings, but the present invention is not limited to the embodiments described above, and the configurations of the respective members can be appropriately changed. In the present embodiment, an example in which the seal member is constituted by two members is shown, but the present invention is not limited thereto. For example, the sealing member may be provided by insert molding of the stator by a mold resin or aluminum die casting. In this case, the stator and the sealing member are molded as an integral single member.
The seal member may be configured only by a plurality of column portions located between adjacent teeth in the circumferential direction. In this case, the stator holding member may have a lower annular portion, and the cover member may have an upper annular portion. The plurality of column parts may be fixed to an upper annular part and a lower annular part provided on the upper surface of the stator holding member and the lower surface of the cover member.
Description of the symbols
10-motor, 11-housing, 11 a-second slot, 12-stator holding member, 13-cover member, 14-sealing member, 14 a-column portion, 14 b-upper annular portion, 14 c-lower annular portion, 14 d-protrusion portion, 20-rotor, 21-shaft, 30-stator, 32-core back, 32 a-first slot, 33-teeth, 33 a-slot, 33 b-opening portion, 35-coil, 40-sealed chamber, 41-outer peripheral side flow path, 42-inner peripheral side flow path, 43-upper flow path, 43 a-top surface, 44-lower flow path, 121-step portion.
Claims (9)
1. A motor is characterized by comprising:
a rotor having a shaft extending in a vertical direction;
a stator located radially outside the rotor; and
a housing for accommodating the above-mentioned stator,
the stator includes: a core back; a plurality of teeth extending radially inward from said core; and a coil wound around the teeth,
a sealed chamber for sealing a cooling medium is provided between the housing and the rotor,
the sealed chamber has a plurality of outer peripheral side flow paths extending in the vertical direction between the core back and the housing in the radial direction.
2. The motor of claim 1,
the outer peripheral side flow path overlaps the teeth as viewed in the radial direction.
3. The motor according to claim 1 or 2,
the outer peripheral side flow path includes: a first groove portion provided on an outer peripheral surface of the core back; and a second groove portion provided on the inner circumferential surface of the housing so as to be radially opposed to the first groove portion.
4. The motor according to any one of claims 1 to 3,
the sealed chamber includes:
an inner peripheral flow path located between the plurality of teeth in the circumferential direction;
an upper flow path connecting the inner peripheral flow path and the outer peripheral flow path on the upper side of the core back; and
and a lower flow path connecting the inner peripheral flow path and the outer peripheral flow path on a lower side of the core back.
5. The motor of claim 4,
the top surface of the upper flow path has an inclined surface portion inclined upward in the vertical direction as it goes outward in the radial direction.
6. The motor according to claim 4 or 5,
the housing has:
a stator holding member that covers an outer periphery and a lower surface of the stator;
a seal member that covers at least an opening between the teeth that are open on the radially inner side of the stator; and
and a cover member connected to an upper end of the stator holding member and an upper end of the sealing member and covering an upper surface of the stator.
7. The motor of claim 6,
the sealing member includes:
a plurality of column portions extending in a vertical direction at an inner peripheral end of the stator;
an upper annular portion connected to upper ends of the plurality of column portions; and
a lower annular portion connected to lower ends of the plurality of column portions,
the inner peripheral flow passage is located radially outward of the plurality of column portions.
8. The motor of claim 7,
the column portion has a projection extending radially outward.
9. The motor according to any one of claims 6 to 8,
the stator holding member has a plurality of step portions on an inner wall surface of the stator holding member for supporting the stator from a lower side,
the stepped portion is located between the two outer peripheral side flow paths in the circumferential direction.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-061785 | 2018-03-28 | ||
| JP2018061785 | 2018-03-28 | ||
| PCT/JP2019/013410 WO2019189493A1 (en) | 2018-03-28 | 2019-03-27 | Motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111919368A true CN111919368A (en) | 2020-11-10 |
Family
ID=68062078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980022567.XA Pending CN111919368A (en) | 2018-03-28 | 2019-03-27 | Motor with a stator having a stator core |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111919368A (en) |
| WO (1) | WO2019189493A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111509876A (en) * | 2020-05-27 | 2020-08-07 | 精进电动科技股份有限公司 | Stator core cooling structure and motor cooling system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS649454U (en) * | 1987-07-06 | 1989-01-19 | ||
| US20030102729A1 (en) * | 2001-10-30 | 2003-06-05 | Masami Sanuki | Motor device for electrical compressor |
| US20030206815A1 (en) * | 2002-05-01 | 2003-11-06 | Kunio Iritani | Electric compressor |
| JP2004048877A (en) * | 2002-07-10 | 2004-02-12 | Nissan Motor Co Ltd | Rotary electric machine |
| JP2004159429A (en) * | 2002-11-06 | 2004-06-03 | Asmo Co Ltd | Brushless motor |
| CN203827121U (en) * | 2013-04-27 | 2014-09-10 | 日本电产株式会社 | Motor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5556446A (en) * | 1978-10-20 | 1980-04-25 | Hitachi Ltd | Coller for rotary electric machine |
| JP2018007487A (en) * | 2016-07-06 | 2018-01-11 | 株式会社豊田自動織機 | Rotary machine |
-
2019
- 2019-03-27 WO PCT/JP2019/013410 patent/WO2019189493A1/en active Application Filing
- 2019-03-27 CN CN201980022567.XA patent/CN111919368A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS649454U (en) * | 1987-07-06 | 1989-01-19 | ||
| US20030102729A1 (en) * | 2001-10-30 | 2003-06-05 | Masami Sanuki | Motor device for electrical compressor |
| US20030206815A1 (en) * | 2002-05-01 | 2003-11-06 | Kunio Iritani | Electric compressor |
| JP2004048877A (en) * | 2002-07-10 | 2004-02-12 | Nissan Motor Co Ltd | Rotary electric machine |
| JP2004159429A (en) * | 2002-11-06 | 2004-06-03 | Asmo Co Ltd | Brushless motor |
| CN203827121U (en) * | 2013-04-27 | 2014-09-10 | 日本电产株式会社 | Motor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019189493A1 (en) | 2019-10-03 |
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Application publication date: 20201110 |