CN112865395B - Cooling system for high power density automotive motor - Google Patents
Cooling system for high power density automotive motor Download PDFInfo
- Publication number
- CN112865395B CN112865395B CN202110236265.1A CN202110236265A CN112865395B CN 112865395 B CN112865395 B CN 112865395B CN 202110236265 A CN202110236265 A CN 202110236265A CN 112865395 B CN112865395 B CN 112865395B
- Authority
- CN
- China
- Prior art keywords
- motor
- cooling
- winding
- power density
- high power
- 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.)
- Active
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 74
- 238000004804 winding Methods 0.000 claims abstract description 45
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 7
- 238000013461 design Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Windings For Motors And Generators (AREA)
Abstract
There is provided a cooling system for a high power density automotive motor, comprising: a motor housing accommodating a stator unit and a rotor unit, the stator unit including an iron core and a winding wound around the iron core, the winding having a first end and a second end; the first cooling channel is spirally arranged on the motor shell along the circumferential direction and is provided with an inlet and an outlet; a first end cooling structure disposed on an inner wall of the motor housing and communicating with an inlet of the first cooling passage; and a second end cooling structure disposed on an inner wall of the motor housing and communicating with an outlet of the first cooling passage; wherein the first and second end cooling structures are adjacent to the first and second ends of the winding, respectively. The cooling system solves the problem that the end part of the motor winding generates heat seriously, and prevents the heat of the end part from being transferred to the end of the bearing so as to influence the service life of the bearing.
Description
Technical Field
The invention belongs to the technical field of new energy automobile motors, and relates to a cooling system for a high-power-density automobile motor.
Background
At present, with the improvement of the popularization degree of the new energy automobile and the strong support of the country, the development of the motor for the new energy automobile is also valued by various parties such as research institutions, universities, enterprises and the like at home and abroad. The power density, torque density and volume requirements of the driving motor are more and more severe, and in the design of the new energy automobile motor, the heating of the winding end is a key influencing factor for influencing the parameters of the motor. At present, the cooling mode of the motor for the new energy automobile is mainly that a liquid cooling structure is arranged in a shell of the motor, cooling medium mainly flows into the shell from an inlet of the motor shell, cooling liquid flowing through the shell absorbs heat transferred to the shell from a stator core and then flows out from a liquid outlet of the shell to enter an external radiator, and the motor is cooled circularly.
However, in the existing cooling system, the motor winding end part dissipates heat only through contact heat conduction between the motor winding end part and the iron core, and the cooling system cannot adapt to the process of developing the high-power-density automobile motor, so that the service life of the motor is influenced.
Accordingly, there is a need to develop a cooling system for a high power density automotive motor that addresses one or more of the above-described technical problems.
Disclosure of Invention
In order to solve at least one of the above technical problems, the applicant has found that, during the development of a motor for a high-power-density vehicle, as the power density and the torque density are further increased, the temperature of the end portions of the stator windings of the motor presents a phenomenon that is much higher than the temperature of the inner windings of the stator core, which directly limits the further increase of the power density and the torque density of the motor. Meanwhile, as the end part of the motor stator winding is close to the bearing, excessive heat is transferred to the end of the bearing, and the service life of the bearing is further influenced.
Based on the above findings, according to an aspect of the present invention, there is provided a cooling system for a high power density automotive motor, characterized by comprising:
A motor housing accommodating a stator unit and a rotor unit, the stator unit including an iron core and a winding wound around the iron core, the winding having a first end and a second end;
The first cooling channel is spirally arranged on the motor shell along the circumferential direction and is provided with an inlet and an outlet;
a first end cooling structure disposed on an inner wall of the motor housing and communicating with an inlet of the first cooling passage; and
The second end part cooling structure is arranged on the inner wall of the motor shell and communicated with the outlet of the first cooling channel;
Wherein the first and second end cooling structures are adjacent the first and second ends of the winding, respectively, for dissipating heat from and preventing heat from the first and second ends of the winding from being transferred to the motor bearing.
According to yet another aspect of the present invention, the first end cooling structure is provided with a first hollow portion, the first hollow portion communicating with the inlet; the second end cooling structure is provided with a second hollow portion which is communicated with the outlet of the first cooling channel.
According to yet another aspect of the present invention, the windings are copper wires.
According to another aspect of the invention, heat conduction insulating glue is filled and sealed between the copper wires.
According to yet another aspect of the invention, a first end cooling structure includes: a protruding portion integrally formed with an inner wall of the motor housing; the buckling part is buckled on the protruding part; and the sealing ring is arranged between the protruding part and the buckling part.
According to a further aspect of the invention, the width of the first end cooling structure is adapted to the width of the first end of the winding.
According to yet another aspect of the present invention, the second end cooling structure includes: the buckling piece is buckled on the inner wall of the motor shell; and the sealing ring is arranged between the inner wall and the buckling piece.
According to yet another aspect of the invention, the width of the second end cooling structure is smaller than the width of the second end of the winding; the second end of the winding is provided with a motor outgoing line to the outside of the motor.
The invention can obtain one or more of the following technical effects:
The design structure is simple, and the motor is suitable for high-power density automobile motors; the temperature of the end part of the motor winding is effectively reduced; the heat dissipation efficiency of the motor winding end part is improved; the heat transfer from the motor winding end part to the bearing end is blocked; the service life of the bearing and the whole motor is prolonged.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 is a schematic cross-sectional structure of a cooling system for a high power density automotive motor according to a preferred embodiment of the present invention.
Fig. 2 is an enlarged view of a part of the structure in fig. 1.
Detailed Description
The present invention is described in its best mode by the following preferred embodiments with reference to the accompanying drawings, and the detailed description herein is to be construed as limiting the invention, since various changes and modifications can be made without departing from the spirit and scope of the invention.
The applicant has found that during the development of high power density automotive motors, with further increases in power density and torque density, the temperature of the motor stator winding ends presents a phenomenon that is much higher relative to the temperature of the stator core inner windings, which directly limits the further increases in power density and torque density of the motor. Meanwhile, as the end part of the motor stator winding is close to the bearing, excessive heat is transferred to the end of the bearing, and the service life of the bearing is further influenced.
Based on the above findings, according to a preferred embodiment of the present invention, referring to fig. 1 to 2, there is provided a cooling system for a high power density motor of an automobile, characterized by comprising:
A motor housing accommodating a stator unit and a rotor unit, the stator unit comprising a core 4 and a winding 3 wound around the core, the winding having a first end 31 and a second end 32;
a first cooling channel which is spirally arranged on the motor shell along the circumferential direction and is provided with an inlet 1 and an outlet 2;
a first end cooling structure 7 provided on an inner wall of the motor housing and communicating with the inlet 1 of the first cooling passage; and
A second end cooling structure 8 provided on an inner wall of the motor housing and communicating with the outlet 2 of the first cooling passage;
Wherein the first and second end cooling structures 7,8 abut the first and second ends 31, 32 of the winding, respectively, for dissipating heat from and preventing heat transfer from the first and second ends of the winding to the motor bearing 9.
Preferably, the motor housing is provided with an inlet (liquid inlet) 1 and an outlet (liquid outlet) 2, respectively provided at both ends of the motor housing. A first cooling channel connects the inlet 1 and the outlet 2. Preferably, the first cooling channel is a spiral channel arranged circumferentially around the motor housing, e.g. extending circumferentially spirally from the inlet 1 to the outlet 2.
According to a further preferred embodiment of the invention, see fig. 2, said first end cooling structure 7 is provided with a first hollow 74, the first hollow 74 being in communication with said inlet 1; the second end cooling structure 8 is provided with a second hollow part which communicates with the outlet 2 of the first cooling channel.
According to a further preferred embodiment of the invention, the winding 3 is a copper wire. The rotor core 5 is disposed opposite to the stator core 4. The motor lead wires 6 are arranged adjacent to the second end cooling structure 8.
According to another preferred embodiment of the invention, heat-conducting insulating glue is filled and sealed between the copper wires.
According to a further preferred embodiment of the invention, the first end cooling structure 7 comprises: a projection 71 integrally formed with an inner wall of the motor housing; a fastening portion 72 fastened to the protruding portion 71; and a seal ring 73 disposed between the protruding portion 71 and the fastening portion 72.
According to a further preferred embodiment of the invention, the width D of the first end cooling structure 7 corresponds to the width D of the first end 31 of the winding. The width D is preferably slightly smaller than the width D or substantially equal to the width D.
According to a further preferred embodiment of the invention, referring to fig. 1, the second end cooling structure 8 comprises: the buckling piece is buckled on the inner wall of the motor shell; and the sealing ring is arranged between the inner wall and the buckling piece.
According to a further preferred embodiment of the invention, the width of the second end cooling structure is smaller than the width of the second end of the winding. Preferably, the second end of the winding is provided with a motor outlet 6 to the outside of the motor.
Preferably, after the copper wires are wound on the motor stator core, the motor stator core is required to be encapsulated, gaps among the copper wires are filled with encapsulating materials under the action of pressure, insulation among the wires can be guaranteed, meanwhile, the heat conductivity coefficient of air is not high as that of the encapsulating adhesive, and the capability of heat transfer outwards when the copper wires heat can be improved after encapsulation. On the basis, the safety electric gap and the creepage distance required by the stator coil can be completely met. At this time, an annular cooling water channel design is added to the end. The liquid inlet of the water channel is communicated with the liquid inlet of the shell, and the liquid outlet directly enters the shell cooling channel. The cooling structure is added to the outgoing line end and the non-outgoing line end of the motor stator winding at the same time.
Preferably, after the motor is wound, a paint dipping process is replaced by a potting process, and meanwhile, an annular cooling flow channel is designed to be close to the winding end.
The invention can obtain one or more of the following technical effects:
The design structure is simple, and the motor is suitable for high-power density automobile motors; the temperature of the end part of the motor winding is effectively reduced; the heat dissipation efficiency of the motor winding end part is improved; the heat transfer from the motor winding end part to the bearing end is blocked; the service life of the bearing and the whole electrode is prolonged.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A cooling system for a high power density automotive motor, comprising:
A motor housing accommodating a stator unit and a rotor unit, the stator unit including an iron core and a winding wound around the iron core, the winding having a first end and a second end;
The first cooling channel is spirally arranged on the motor shell along the circumferential direction and is provided with an inlet and an outlet;
a first end cooling structure disposed on an inner wall of the motor housing and communicating with an inlet of the first cooling passage; and
The second end part cooling structure is arranged on the inner wall of the motor shell and communicated with the outlet of the first cooling channel;
Wherein the first and second end cooling structures are adjacent the first and second ends of the winding, respectively, for dissipating heat from and preventing heat from the first and second ends of the winding from being transferred to the motor bearing;
The first end cooling structure includes: a protruding portion integrally formed with an inner wall of the motor housing; the buckling part is buckled on the protruding part; and the sealing ring is arranged between the protruding part and the buckling part.
2. The cooling system for a high power density automotive electric machine according to claim 1, characterized in that said first end cooling structure is provided with a first hollow portion which communicates with said inlet; the second end cooling structure is provided with a second hollow portion which is communicated with the outlet of the first cooling channel.
3. Cooling system for a high power density automotive motor according to claim 1 or 2, characterized in that the windings are copper wires.
4. A cooling system for a high power density automotive motor as claimed in claim 3, characterized in that a thermally conductive insulating glue is potted between said copper wires.
5. A cooling system for a high power density automotive electric machine according to claim 1 or 2, characterized in that the first end cooling structure employs an annular cooling water channel, the outlet of which directly enters the first cooling channel.
6. The cooling system for a high power density automotive electric machine of claim 5, characterized in that the width of said first end cooling structure is adapted to the width of the first end of said winding.
7. The cooling system for a high power density automotive electric machine of claim 5, characterized in that said second end cooling structure comprises: the buckling piece is buckled on the inner wall of the motor shell; and the sealing ring is arranged between the inner wall and the buckling piece.
8. The cooling system for a high power density automotive electric machine of claim 5, characterized in that the width of said second end cooling structure is smaller than the width of the second end of said winding; the second end of the winding is provided with a motor outgoing line to the outside of the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110236265.1A CN112865395B (en) | 2021-03-03 | 2021-03-03 | Cooling system for high power density automotive motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110236265.1A CN112865395B (en) | 2021-03-03 | 2021-03-03 | Cooling system for high power density automotive motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112865395A CN112865395A (en) | 2021-05-28 |
| CN112865395B true CN112865395B (en) | 2024-07-23 |
Family
ID=75991336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110236265.1A Active CN112865395B (en) | 2021-03-03 | 2021-03-03 | Cooling system for high power density automotive motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112865395B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023167195A1 (en) * | 2022-03-02 | 2023-09-07 | ニデック株式会社 | Motor, and electric vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428422A (en) * | 2017-08-31 | 2019-03-05 | 中车株洲电力机车研究所有限公司 | A kind of electric motor winding end cooling device and cooling system |
| CN214543927U (en) * | 2021-03-03 | 2021-10-29 | 江苏华永复合材料有限公司 | New energy automobile motor winding tip cooling device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10248926B4 (en) * | 2002-10-15 | 2004-11-11 | Bitzer Kühlmaschinenbau Gmbh | compressor |
| CN108696039B (en) * | 2018-05-31 | 2020-05-05 | 安徽江淮汽车集团股份有限公司 | Motor cooling device |
| CN108880106A (en) * | 2018-07-30 | 2018-11-23 | 山东冬瑞高新技术开发有限公司 | A kind of motor with air-cooling apparatus |
| RU2706016C1 (en) * | 2019-04-29 | 2019-11-13 | Владимир Андреевич Коровин | Electric machine stator with liquid cooling |
-
2021
- 2021-03-03 CN CN202110236265.1A patent/CN112865395B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428422A (en) * | 2017-08-31 | 2019-03-05 | 中车株洲电力机车研究所有限公司 | A kind of electric motor winding end cooling device and cooling system |
| CN214543927U (en) * | 2021-03-03 | 2021-10-29 | 江苏华永复合材料有限公司 | New energy automobile motor winding tip cooling device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112865395A (en) | 2021-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106655563B (en) | A kind of motor cooling and the inorganic shell motor with the structure | |
| EP1593191B1 (en) | Stator coil module, method of manufacturing the same, and electric rotating machine | |
| CN108462318B (en) | Motor cooling structure, power motor and electric drive system | |
| CN108270301B (en) | Stator structure with winding end cooling structure and motor thereof | |
| CN211429030U (en) | Motor end winding cooling structure based on phase change heat pipe | |
| US20040100154A1 (en) | Concentrated winding electric motor having optimized winding cooling and slot fill | |
| JP5240131B2 (en) | Motor cooling structure | |
| CN112865395B (en) | Cooling system for high power density automotive motor | |
| CN113661638A (en) | Electric machine with torque support in housing | |
| CN111900837B (en) | Device and method for directly cooling end winding of flat permanent magnet motor | |
| CN214543927U (en) | New energy automobile motor winding tip cooling device | |
| CN110011457B (en) | Motor stator structure with integrated heat pipe and iron core | |
| CN109768637B (en) | Low-temperature-rise permanent magnet driving motor with external rectangular heat-dissipating water pipe and shell filled with heat-conducting glue | |
| CN111245147A (en) | Mixed cooling system of birotor stator yoke-free modular axial motor | |
| CN113437825B (en) | Motor heat radiation structure, motor and compressor | |
| CN113364168A (en) | Stator module, motor and air conditioner | |
| CN221227268U (en) | Cooling structure based on disc motor | |
| US20240162786A1 (en) | Internal cooling systems for e-machines | |
| CN220067024U (en) | Motor with heat pipe at end part of stator | |
| JP3470673B2 (en) | Rotating electric machine | |
| CN113224871B (en) | Magnetic circuit assembly, flux motor and electric automobile | |
| JP5678562B2 (en) | Motor cooling device | |
| CN218940835U (en) | Permanent magnet motor with novel cooling structure | |
| CN220173052U (en) | Motor auxiliary heat dissipation mechanism, motor and electric vehicle | |
| CN221009901U (en) | Motor and vehicle power system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |