CN108462318A - Motor cooling, power motor and power drive system - Google Patents
Motor cooling, power motor and power drive system Download PDFInfo
- Publication number
- CN108462318A CN108462318A CN201710095454.5A CN201710095454A CN108462318A CN 108462318 A CN108462318 A CN 108462318A CN 201710095454 A CN201710095454 A CN 201710095454A CN 108462318 A CN108462318 A CN 108462318A
- Authority
- CN
- China
- Prior art keywords
- motor
- liquid cooling
- cooling
- rotor
- liquid
- 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.)
- Granted
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 149
- 239000007788 liquid Substances 0.000 claims abstract description 129
- 210000004534 cecum Anatomy 0.000 claims abstract description 3
- 239000012530 fluid Substances 0.000 claims description 22
- 238000004804 winding Methods 0.000 claims description 12
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 238000004512 die casting Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 238000009987 spinning Methods 0.000 claims 1
- 239000002826 coolant Substances 0.000 description 9
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- 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
- H02K9/197—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The present invention relates to motor cooling and include its power motor and power drive system.The motor cooling includes rotor liquid cooling structure, and, the rotor liquid cooling structure includes the hollow blind hole being located in rotor shaft, it is provided with liquid cooling pipeline in the hollow blind hole, first end opening of the liquid cooling pipeline reaches the cecum of the hollow blind hole, second end opening of the liquid cooling pipeline reaches the open end of the hollow blind hole, and the hollow blind hole and the liquid cooling pipeline constitute the liquid cooling flow path of the rotor liquid cooling structure.
Description
Technical field
The present invention relates to power motor technical fields；Specifically, the present invention relates to motor cooling, power motor and
Power drive system.
Background technology
By taking electric vehicle as an example, power motor strongly pursues high power/torque density, high efficiency, high reliability.It is setting
The selection of timing, motor electromagnetic load and thermic load tends to the limit, and the loss of unit volume and calorific value is caused to significantly increase, right
The power and torque density of motor, efficiency, the performance of insulating materials and life and reliability generate significant impact.
For that purpose it is necessary to improve the cooling heat dissipation of power motor, Rational choice and arrangement cooling system, hot-spot is avoided
Point tries the heat in motor being fully discharged.Under the premise of ensuring motor safe and reliable operation, abundant digging motor is dived
Power makes motor performance perform to ultimate attainment.
For induction machine, due to the induced current on rotor so that larger heat is generated on rotor, and it is usual
The heat dissipation of rotor is more difficult, the Wen Sheng higher of rotor；Meanwhile the rotating speed of power motor is usually very high, up to 15000rpm, high speed
Under service condition, the own loss of bearing increases, it is contemplated that the heat transfer of rotor Wen Sheng itself so that and the temperature of bearing is excessively high,
Bearing excess temperature is easily generated, the service life of bearing is seriously affected.
Currently, power motor mostly uses greatly the mode of casing liquid cooling and carries out the cooling of motor, and casing is usually shell and interior
Shell is installed together by hot jacket, forms built-in screw type or S types or other shapes of cooling circuit；The stator of motor around
Group generally uses vacuum paint dipping technology.
Invention content
The object of the present invention is to provide a kind of motor coolings that can overcome aforementioned prior art defect.
Further, the present invention also aims to provide a kind of power motor and electricity including aforementioned motor cooling structure
Drive system.
In order to realize that foregoing purpose, the first aspect of the present invention provide a kind of motor cooling, wherein the motor
Cooling structure includes rotor liquid cooling structure, also, the rotor liquid cooling structure includes the hollow blind hole being located in rotor shaft,
Liquid cooling pipeline is provided in the hollow blind hole, the first end opening of the liquid cooling pipeline reaches the blind of the hollow blind hole
End, the second end opening of the liquid cooling pipeline reach the open end of the hollow blind hole, the hollow blind hole and the liquid cooling
Pipeline constitutes the liquid cooling flow path of the rotor liquid cooling structure.
Optionally, in foregoing motor cooling, with second end opening on the liquid cooling pipeline
One end is fixed on motor case or electric motor end cap.
Optionally, in foregoing motor cooling, the motor cooling further includes stator liquid cooling structure,
The stator liquid cooling structure is in fluid communication with the rotor liquid cooling structure.
Optionally, in foregoing motor cooling, the stator liquid cooling structure includes double at motor case
Spiral liquid cooling loop.
Optionally, in foregoing motor cooling, the double helix liquid cooling loop integral type die casting is in described
In motor case.
Optionally, in foregoing motor cooling, the motor case includes the shell and inner casing of nesting, institute
Double helix liquid cooling loop is stated to be cooperatively formed by the nested shell and the inner casing.
Optionally, in foregoing motor cooling, there are two lists in parallel for the double helix liquid cooling loop tool
Spiral flow path, and the single-screw flow path has shared inlet and different leakage fluid drams.
Optionally, in foregoing motor cooling, the second end opening of the liquid cooling pipeline is via described turn
The liquid inlet of sub- liquid cooling structure is connected to the leakage fluid dram of one of two described single-screw flow paths.
Optionally, in foregoing motor cooling, the open end of the hollow blind hole is via the rotor liquid
The liquid inlet of air-cooled structure is connected to the leakage fluid dram of one of two described single-screw flow paths.
Optionally, in foregoing motor cooling, the motor cooling further includes plastic packaging in motor
Epoxy resin at Stator End Winding, the epoxy resin is between the Stator End Winding and motor case.
In order to realize that foregoing purpose, the second aspect of the present invention provide a kind of power motor, wherein the power motor
It include the motor cooling as described in any one of aforementioned first aspect.
In order to realize that foregoing purpose, the third aspect of the present invention provide a kind of power drive system, wherein the electric drive
System includes the motor as described in aforementioned second aspect.
Description of the drawings
With reference to attached drawing, the disclosure will be apparent.It is to be appreciated that the mesh that these attached drawings are merely illustrative
, and be not intended to and protection scope of the present invention is construed as limiting.In figure：
Fig. 1 is the schematic cross-section according to a kind of embodiment of the power motor of the present invention；
Fig. 2 is the U-shaped motor case with integral type double helix liquid cooling loop of power motor in Fig. 1；
Fig. 3 is the double helix liquid cooling loop at motor case in Fig. 2；And
Fig. 4 is the schematic diagram of the rotor liquid cooling structure of power motor in Fig. 1.
Specific implementation mode
Explain the specific implementation mode of the present invention in detail with reference to the accompanying drawings.In the drawings, identical reference numeral
Indicate identical or corresponding technical characteristic.
Fig. 1 is the schematic cross-section according to a kind of embodiment of the power motor of the present invention.It can be seen from the figure that should
Power motor includes motor case 1, stator winding 2, stator core 3, electric motor end cap 5, rotor core 6 etc..
In figure, stator winding 2 is embedding to be wound in stator core 3, and stator core 3 is assigned in by shrink-on on motor case 1, electricity
Generator terminal lid 5 is bolted together with motor case 1.Motor case 1 can internal stator liquid cooling structure.In motor operation
When, coolant liquid takes away the heat at motor stator in stator liquid cooling structure internal circulation flow.Coolant liquid herein can be cold
But water or other common liquid cooling mediums.
In addition, vacuum pouring epoxy resin 4, which may be used, in the End winding of stator core 3 carries out plastic packaging.As shown, ring
Oxygen resin 4 may be between Stator End Winding and motor case, while ensureing the insulation performance of stator winding, significantly
Improve the heat dissipation performance of motor stator End winding.
Rotor core 6 can be installed on by interference fit on rotor shaft 8 in figure, and rotor end ring 7a, 7b are located at rotor
The both sides of iron core 6.Rotor shaft 8 is supported on motor case 1 and end cap 5 by the first bearing 9a and second bearing 9b at both ends
On.It is respectively arranged with O-ring 10a and 10b on the outside of first bearing 9a, second bearing 9b.Hollow blind hole is provided in rotor shaft 8
18, liquid cooling pipeline 11 is provided in hollow blind hole 18, it will be appreciated that, coolant liquid can flow into, from liquid cooling pipeline 11 from hollow
Blind hole 18 flows out, and can also flow into from hollow blind hole 18, be flowed out from liquid cooling pipeline 11, realize the cooling of rotor.
According in Fig. 1, one end with the first end opening 11a is suspended in hollow blind hole 18 on liquid cooling pipeline 11；And have
There is one end of the second end opening 11b to be then fixed on motor case 1 or electric motor end cap.In order to ensure the coolant liquid of rotor liquid cooling structure
Do not enter inside motor, dynamic sealing 12 can be equipped in the end of rotor shaft 8.
Fig. 2 is the motor case 1 with integral type stator liquid cooling structure of power motor in Fig. 1.The motor case 1 can have
Have through the molding U-shaped structure of integrated die-casting.It will be seen that it is simpler, reliable to be integrally formed formula liquid cooling casing structure.
The stator liquid cooling structure of power motor can be located at the motor case.Stator liquid cooling in the shown embodiment
Structure has double helix liquid cooling loop.It will be seen that the double helix liquid cooling loop can be formed on the inside of motor case, outside or
It is built in the motor integrated casing.For example, in alternative embodiments, double helix liquid cooling structure can directly be cast
In motor case；Or motor case may include nested shell and inner casing, double helix liquid cooling loop then can be embedding by this
The shell and inner casing of set cooperatively form.Specifically, shell and inner casing may be used hot jacket and install and be welded and fixed at both ends.
Preferably, stator liquid cooling structure can be in fluid communication with rotor liquid cooling structure；Stator liquid cooling structure and rotor can hereinafter be combined
Liquid cooling structure is specifically described.
Fig. 3 is the double helix liquid cooling loop at motor case in Fig. 2.
It can be seen from the figure that the double helix liquid cooling loop can have, there are two single-screw flow paths in parallel, and single spiral shell
Eddy flow road has shared inlet 13 and different leakage fluid drams 14,15.As it can be seen that coolant liquid in double helix liquid cooling loop will be by
Inlet 13 flows into, and is then divided to two-way respectively along two single-screw flow paths, carries out the cooling of motor stator, then from the
The leakage fluid dram 14 of the leakage fluid dram 15 of one single-screw flow path and the second single-screw flow path flows out.
As described in the text, stator liquid cooling structure can be in fluid communication with rotor liquid cooling structure.In optional embodiment
In, the leakage fluid dram 15 of the double helix liquid cooling loop of stator liquid cooling structure can be connected directly with the liquid inlet of rotor liquid cooling structure,
Carry out the cooling of rotor；And leakage fluid dram 14 then can be flowed outwardly directly through motor case 1.Correspondingly, leakage fluid dram can also be made
14 are connected directly with the liquid inlet of rotor liquid cooling structure, and cooling, the leakage fluid dram 15 for carrying out rotor are then directly outside through motor case 1
Outflow.
Fig. 4 is the schematic diagram of the rotor liquid cooling structure of power motor in Fig. 1.
It can be seen from the figure that the rotor liquid cooling structure includes the hollow blind hole 18 being located in rotor shaft 8, hollow blind
It is provided with liquid cooling pipeline 11 in hole 18, forms annular compartment therebetween and is flowed through suitable for coolant liquid.The first of liquid cooling pipeline 11
End opening 11a reaches the cecum of hollow blind hole 18, and the second end opening 11b of liquid cooling pipeline 11 reaches hollow blind hole 18
Open end.Hollow blind hole 18 and liquid cooling pipeline 11 constitute the liquid cooling flow path of rotor liquid cooling structure.In addition, rotor liquid cooling structure also wraps
Include the liquid inlet 16 and liquid outlet 17 of the open end of the first end opening 11a and hollow blind hole 18 that are connected respectively to liquid cooling pipeline.
As described in the text, rotor liquid cooling structure can be in fluid communication with stator liquid cooling structure.For example, liquid cooling pipeline 11
Second end opening 11b can be connected to the leakage fluid dram 14 of one of two single-screw flow paths via the liquid inlet 16 of rotor liquid cooling structure
Or 15.In this case, coolant liquid can be via the leakage fluid dram 14 or 15 of the first single-screw flow path on motor case 1 through turning
The liquid inlet 16 of liquid cooling pipeline 11 in sub- shaft 8 enters in the liquid cooling pipeline 11 in rotor shaft 8, and after through liquid cooling pipe road 11
It is flowed out with the annular compartment in rotor shaft 8, most the liquid outlet 17 through rotor liquid cooling structure 11 flows out afterwards.For another example hollow blind
The open end in hole 18 can be connected to the leakage fluid dram 14 of one of two single-screw flow paths via the liquid inlet 16 of rotor liquid cooling structure
Or 15.In this case, coolant liquid can also be passed through via the leakage fluid dram 14 or 15 of the first single-screw flow path on motor case 1
The liquid inlet 16 of liquid cooling pipeline 11 in rotor shaft 8 enters in the annular compartment in rotor shaft 8, and after through annular compartment with
Liquid cooling pipeline 11 flows out, and most the liquid outlet 17 through rotor liquid cooling structure flows out afterwards.It will be seen that the different connection side of above two
Coolant liquid flow direction different in rotor liquid cooling structure may be implemented in formula.
By above description, those skilled in the art can obtain dynamic including foregoing motor cooling
Force motor and power drive system.It is contemplated that this motor and power drive system can be used for driving such as new-energy automobile
New energy vehicle.
Those skilled in the art will be seen that, the present invention is by the way of double-stranded motor case liquid cooling pair
The stator of motor carries out cooling heat, and casting epoxy resin carries out plastic packaging at Stator End Winding, further improves stator
The heat dissipation of End winding so that the heat on motor stator is spread well, the longevity of the insulating materials for improving motor
Life has great importance；Meanwhile in order to which overall planning is analyzed, rotor excess temperature or bearing excess temperature, the present invention is avoided to use
Rotor liquid cooling structure, cooperates with electromagnetism and the thermal design of motor, avoids local weak link, help to improve motor power and
Torque density, life and reliability, have very important significance.
The technical scope of the present invention is not limited solely to the content in above description, and those skilled in the art can not take off
Under the premise of from technical thought of the invention, many variations and modifications are carried out to the above embodiment, and these deformations and modification are equal
It should be within the scope of the present invention.
Claims (12)
1. a kind of motor cooling, which is characterized in that the motor cooling includes rotor liquid cooling structure, also, described
Rotor liquid cooling structure includes the hollow blind hole being located in rotor shaft, and liquid cooling pipeline is provided in the hollow blind hole, described
First end opening of liquid cooling pipeline reaches the cecum of the hollow blind hole, and the second end opening of the liquid cooling pipeline reaches institute
The open end of hollow blind hole is stated, the hollow blind hole and the liquid cooling pipeline constitute the liquid cooling flow path of the rotor liquid cooling structure.
2. motor cooling as described in claim 1, wherein have the one of second end opening on the liquid cooling pipeline
End is fixed on motor case or electric motor end cap.
3. motor cooling as claimed in claim 1 or 2, wherein the motor cooling further includes stator liquid cooling knot
Structure, the stator liquid cooling structure are in fluid communication with the rotor liquid cooling structure.
4. motor cooling as claimed in claim 3, wherein the stator liquid cooling structure includes double spiral shells at motor case
Spinning liquid cold loop.
5. motor cooling as claimed in claim 4, wherein the double helix liquid cooling loop integral type die casting is in the electricity
In machine casing.
6. motor cooling as claimed in claim 5, wherein the motor case includes the shell and inner casing of nesting, institute
Double helix liquid cooling loop is stated to be cooperatively formed by the nested shell and the inner casing.
7. the motor cooling as described in any one of claim 4 to 6, wherein the double helix liquid cooling loop has two
The single-screw flow path of a parallel connection, and the single-screw flow path has shared inlet and different leakage fluid drams.
8. motor cooling as claimed in claim 7, wherein the second end opening of the liquid cooling pipeline is via the rotor
The liquid inlet of liquid cooling structure is connected to the leakage fluid dram of one of two described single-screw flow paths.
9. motor cooling as claimed in claim 7, wherein the open end of the hollow blind hole is via the rotor liquid cooling
The liquid inlet of structure is connected to the leakage fluid dram of one of two described single-screw flow paths.
10. motor cooling as claimed in any one of claims 1-9 wherein, wherein the motor cooling further includes modeling
The epoxy resin being encapsulated at the Stator End Winding of motor, the epoxy resin are located at the Stator End Winding and motor case
Between.
11. a kind of power motor, which is characterized in that the power motor includes such as any one of preceding claims 1 to 10 institute
The motor cooling stated.
12. a kind of power drive system, which is characterized in that the power drive system includes motor as claimed in claim 11.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710095454.5A CN108462318B (en) | 2017-02-22 | 2017-02-22 | Motor cooling structure, power motor and electric drive system |
| PCT/CN2017/091584 WO2018153001A1 (en) | 2017-02-22 | 2017-07-04 | Motor cooling structure, power motor and electric drive system |
| TW107101656A TWI782944B (en) | 2017-02-22 | 2018-01-17 | Motor cooling structure, power motor and electric drive system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710095454.5A CN108462318B (en) | 2017-02-22 | 2017-02-22 | Motor cooling structure, power motor and electric drive system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108462318A true CN108462318A (en) | 2018-08-28 |
| CN108462318B CN108462318B (en) | 2022-04-26 |
Family
ID=63229200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710095454.5A Active CN108462318B (en) | 2017-02-22 | 2017-02-22 | Motor cooling structure, power motor and electric drive system |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN108462318B (en) |
| TW (1) | TWI782944B (en) |
| WO (1) | WO2018153001A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109309430A (en) * | 2018-11-21 | 2019-02-05 | 中国科学院电工研究所 | A kind of motor cooling of spindle central water cooling |
| CN109742886A (en) * | 2019-01-04 | 2019-05-10 | 锦州汉拿电机有限公司 | Field frame assembly and driving motor |
| CN110733334A (en) * | 2019-10-29 | 2020-01-31 | 宁波菲仕运动控制技术有限公司 | Motor rotor cooling system of electric drive assemblies |
| CN112520000A (en) * | 2019-09-17 | 2021-03-19 | 西门子（中国）有限公司 | Pod type propeller and ship |
| CN112740517A (en) * | 2018-09-18 | 2021-04-30 | 施乐百汽车有限两合公司 | Heat sink for electric motor, and method of cooling electric motor |
| CN112956118A (en) * | 2018-11-05 | 2021-06-11 | 采埃孚股份公司 | Electric machine with fluid cooling |
| CN113572289A (en) * | 2021-07-05 | 2021-10-29 | 合肥巨一动力系统有限公司 | Oil-cooling hollow rotating shaft structure |
| CN114567126A (en) * | 2022-03-07 | 2022-05-31 | 杭州桢正玮顿运动控制技术有限公司 | Oil-cooled permanent magnet synchronous motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018218818A1 (en) * | 2018-11-05 | 2020-05-07 | Zf Friedrichshafen Ag | Electrical machine with a fluid cooling device |
| CN109586511B (en) * | 2018-12-31 | 2024-03-19 | 卧龙电气驱动集团股份有限公司 | Liquid cooling permanent magnet motor with controller cooling function |
| CN110266127B (en) | 2019-06-04 | 2021-10-15 | 华为技术有限公司 | Motor, motor cooling system and electric vehicle |
| JP7308773B2 (en) * | 2020-01-23 | 2023-07-14 | エドワーズ株式会社 | Rotating device and vacuum pump |
| CN113890249B (en) * | 2021-09-28 | 2023-01-20 | 上海汽车变速器有限公司 | Motor assembly and motor cooling system |
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| CN112740517A (en) * | 2018-09-18 | 2021-04-30 | 施乐百汽车有限两合公司 | Heat sink for electric motor, and method of cooling electric motor |
| CN112956118A (en) * | 2018-11-05 | 2021-06-11 | 采埃孚股份公司 | Electric machine with fluid cooling |
| CN109309430A (en) * | 2018-11-21 | 2019-02-05 | 中国科学院电工研究所 | A kind of motor cooling of spindle central water cooling |
| CN109742886A (en) * | 2019-01-04 | 2019-05-10 | 锦州汉拿电机有限公司 | Field frame assembly and driving motor |
| CN109742886B (en) * | 2019-01-04 | 2020-07-14 | 锦州汉拿电机有限公司 | Stator assembly and driving motor |
| CN112520000A (en) * | 2019-09-17 | 2021-03-19 | 西门子（中国）有限公司 | Pod type propeller and ship |
| CN110733334A (en) * | 2019-10-29 | 2020-01-31 | 宁波菲仕运动控制技术有限公司 | Motor rotor cooling system of electric drive assemblies |
| CN113572289A (en) * | 2021-07-05 | 2021-10-29 | 合肥巨一动力系统有限公司 | Oil-cooling hollow rotating shaft structure |
| CN113572289B (en) * | 2021-07-05 | 2022-05-31 | 合肥巨一动力系统有限公司 | Oil-cooling hollow rotating shaft structure |
| CN114567126A (en) * | 2022-03-07 | 2022-05-31 | 杭州桢正玮顿运动控制技术有限公司 | Oil-cooled permanent magnet synchronous motor |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201832452A (en) | 2018-09-01 |
| CN108462318B (en) | 2022-04-26 |
| TWI782944B (en) | 2022-11-11 |
| WO2018153001A1 (en) | 2018-08-30 |
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