CN110733334A - Motor rotor cooling system of electric drive assemblies - Google Patents

Motor rotor cooling system of electric drive assemblies Download PDF

Info

Publication number
CN110733334A
CN110733334A CN201911034871.4A CN201911034871A CN110733334A CN 110733334 A CN110733334 A CN 110733334A CN 201911034871 A CN201911034871 A CN 201911034871A CN 110733334 A CN110733334 A CN 110733334A
Authority
CN
China
Prior art keywords
oil
hollow
motor
input shaft
rotating shaft
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
Application number
CN201911034871.4A
Other languages
Chinese (zh)
Other versions
CN110733334B (en
Inventor
杨先时
牛波
牛正蕊
应迎策
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Feishi Sports Control Technology Co Ltd
Original Assignee
Ningbo Feishi Sports Control Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ningbo Feishi Sports Control Technology Co Ltd filed Critical Ningbo Feishi Sports Control Technology Co Ltd
Priority to CN201911034871.4A priority Critical patent/CN110733334B/en
Publication of CN110733334A publication Critical patent/CN110733334A/en
Priority to PCT/CN2020/084734 priority patent/WO2021082360A1/en
Application granted granted Critical
Publication of CN110733334B publication Critical patent/CN110733334B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

The invention discloses a motor rotor cooling system of an electric drive assembly, which comprises a pump, an oil pan, a motor rotor and a hollow input shaft of a speed reducer, wherein the motor rotor comprises a laminated core of the motor rotor and a hollow rotating shaft of the motor, an oil suction port of the pump is immersed in the oil pan, an oil outlet of the pump is hermetically connected with the hollow input shaft of the speed reducer, the hollow input shaft of the speed reducer is inserted into an inner hole of the hollow rotating shaft of the motor and is connected with the hollow rotating shaft of the motor through a spline structure, an oil passage is arranged inside the laminated core of the motor rotor, the hollow rotating shaft of the motor is respectively provided with a front oil discharge port and a rear oil return port which are communicated with the oil passage, the front oil discharge port is communicated with the end of the hollow input shaft of the speed reducer, and the rear oil return port is communicated with the oil pan through a gap between the hollow rotating shaft of the motor and the hollow input shaft of the speed reducer and.

Description

Motor rotor cooling system of electric drive assemblies
Technical Field
The invention relates to a cooling system for an electric drive assembly of a new energy automobile, in particular to a motor rotor cooling system for electric drive assemblies.
Background
Under the development theme of energy conservation and environmental protection, a plurality of new energy automobile supporting policies are developed in China, the technology of new energy automobiles is continuously updated in an iterative mode, particularly the integration degree of a power assembly of a pure electric drive automobile is higher and higher, the electric drive assembly is required to provide power more efficiently, and higher challenges are brought to the cooling performance of the power assembly.
The motor rotor cooling system of the electric drive assembly in the prior art adopts an external coolant loop form.
As shown in fig. 1, the existing motor rotor cooling scheme adopts an external cooling liquid loop, and the cooling liquid in the oil pan 3 enters the hollow input shaft 2 of the speed reducer from the oil outlet of the pump 1, passes through the hollow rotating shaft 8 of the motor, and flows back to the oil pan 3 through the external oil passage 17, so as to form a cooling cycle. The scheme adopts an external cooling liquid loop form, needs to be installed and fixed, occupies a larger space, and is not beneficial to the integrated design of the electric drive assembly; meanwhile, the scheme realizes cooling only by heat exchange of the cooling liquid of the hollow rotating shaft part of the motor, and the cooling effect is insufficient because the heat exchange area of the cooling liquid is small.
Disclosure of Invention
The invention aims to solve the technical problem of providing motor rotor cooling systems of electric drive assemblies aiming at the defects of the prior art, and the motor rotor cooling systems of the electric drive assemblies improve the heat exchange area between cooling liquid and a motor rotor through a built-in cooling liquid loop, greatly improve the cooling efficiency and efficiently realize cooling liquid circulation.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
electric drive assembly motor rotor cooling system, including pump, oil pan, motor rotor and hollow input shaft of the reduction gear, the motor rotor includes the laminated core of the motor rotor and fixes the hollow rotating shaft of the motor inside the laminated core of the motor rotor, the oil suction opening of the said pump submerges in the oil pan, the oil outlet of the pump is connected with end of the hollow input shaft of the reduction gear hermetically, another end of the hollow input shaft of the said reduction gear inserts in the bore of the hollow rotating shaft of the motor and the hollow input shaft of the reduction gear is connected with hollow rotating shaft of the motor through the spline structure, there are oil ducts inside the laminated core of the motor rotor, the said hollow rotating shaft of the motor has front oil discharge outlet and back discharge oil return port communicated with both ends of the oil duct separately, the said front oil discharge outlet communicates with end of the hollow input shaft of the reduction gear located in the bore of the hollow rotating shaft of the motor, the said back discharge oil return communicates with oil pan through the clearance between;
thereby coolant liquid in the oil pan flows through pump, hollow input shaft of reduction gear, the preceding oil discharge port of the hollow pivot of motor and oil duct in proper order and forms out the oil route, thereby coolant liquid in the oil duct flows through the back row oil return mouth of the hollow pivot of motor, the hole of the hollow pivot of motor and the clearance between the outer wall of the hollow input shaft of reduction gear, spline structure and oil pan in proper order and forms back oil route, it forms the circulation closed circuit to go out oil route and back oil route intercommunication each other.
According to the technical scheme of improvement, the outer wall of the hollow input shaft of the speed reducer is in sealing connection with the inner hole wall of the hollow rotating shaft of the motor through a sealing ring and a second sealing ring, and the sealing ring and the second sealing ring are located between the front-row oil return opening and the rear-row oil return opening.
The invention adopts a technical scheme of improving , the spline structure comprises a spline arranged on the outer wall of the hollow input shaft of the speed reducer and a second spline arranged on the inner hole wall of the hollow rotating shaft of the motor, the hollow input shaft of the speed reducer and the hollow rotating shaft of the motor are fixedly connected through the meshing of the spline and the second spline, and partial meshing teeth are removed from the meshing part of the spline and the second spline to form a through hole for the flowing of the cooling liquid.
As a further improvement of , the oil pan is fixed to the bottom of the reducer housing in the electric drive assembly.
As a further improvement of , the pump is a mechanical pump or an electronic pump.
The invention has the beneficial effects that:
(1) the motor rotor cooling system of the electric drive assembly has the advantages that the cooling liquid loop is arranged in the motor rotor cooling system, namely, the cooling liquid flows through the oil ducts of the motor hollow rotating shaft and the motor rotor laminated core, so that a large enough heat exchange area exists, the heat exchange is ensured to be sufficient, the heat exchange efficiency is improved, the cooling liquid circulation is realized efficiently, and the performance of the electric drive assembly is improved.
(2) The cooling system and the electric drive assembly structure are designed in an integration mode, the structure is highly integrated, an external oil duct and a mounting structure are omitted, and the external size of the electric drive assembly is optimized.
(3) The front and the back of the hollow rotating shaft of the motor are respectively provided with the front oil discharge port and the back oil return port, cooling liquid can freely flow through the front oil discharge port and the back oil return port, and the cooling liquid can only flow out of the front oil discharge port of the hollow rotating shaft of the motor and flow in from the back oil return port under the sealing action of the -th sealing ring and the second sealing ring, so that oil liquid cross cavities are prevented, the cooling liquid is ensured to flow according to a designed through-flow path, and the cooling effect is ensured.
(4) Compared with an external cooling liquid loop, the invention can be expanded to the multi-oil-channel characteristic of the laminated core of the motor rotor, thereby greatly improving the heat exchange area of the cold cooling liquid and the motor rotor and greatly improving the cooling efficiency.
Drawings
Fig. 1 is a schematic diagram of a prior art principle similar to the present invention.
Fig. 2 is a schematic diagram of the principle of the present invention.
FIG. 3 is a schematic view of a coolant circulation circuit according to the present invention.
Fig. 4 is a schematic view of the hollow rotating shaft of the motor of the invention.
FIG. 5 is a schematic view of the spline structure of the present invention.
Detailed Description
A further description of an embodiment of the present invention is provided below with reference to fig. 2-5:
the present embodiment provides motor rotor cooling systems for electric drive assemblies, as shown in fig. 2, including a pump 1, an oil pan 3, a motor rotor, a hollow input shaft 2 of a speed reducer, a motor housing 9, a bearing 10 at the front end of the hollow input shaft 2 of the speed reducer, a bearing 10 at the rear end of the hollow input shaft 2 of the speed reducer, a speed reducer housing 11, a motor rear housing 12, a speed reducer differential assembly 13, and a speed reducer intermediate shaft assembly 14.
As shown in fig. 2, the motor rotor of this embodiment includes a motor rotor laminated core and a motor hollow rotating shaft 8 fixed inside the motor rotor laminated core, an oil suction port of the pump 1 is immersed in the oil pan 3, an oil outlet of the pump 1 is hermetically connected with an end of the reducer hollow input shaft 2, another end of the reducer hollow input shaft 2 is inserted into an inner hole of the motor hollow rotating shaft 8, the reducer hollow input shaft 2 is connected with the motor hollow rotating shaft 8 through a spline structure 4, an oil passage 6 is arranged inside the motor rotor laminated core, the motor hollow rotating shaft 8 is respectively provided with a front oil discharge port 15 and a rear oil return port 16 (as shown in fig. 4) which are communicated with two ends of the oil passage 6, the front oil discharge port 15 is communicated with a end of the reducer hollow input shaft 2 located in the inner hole of the motor hollow rotating shaft 8, and the rear oil return port 16 is communicated with the oil pan 3 sequentially through a gap between the inner hole of the motor hollow rotating shaft 8 and an outer wall.
The hollow input shaft 2 of the speed reducer of the embodiment is positioned and assembled with the shell 11 of the speed reducer by adopting the bearings 10 at the front end and the rear end; the hollow input shaft 2 of the speed reducer is connected with the hollow rotating shaft 8 of the motor through a spline structure 4; the motor hollow rotating shaft 8 and the motor rotor laminated core are in interference fit, and a front oil discharge port 15 and a rear oil return port 16 of the motor hollow rotating shaft 8 are communicated with the oil duct 6 of the motor rotor laminated core.
Thereby the coolant liquid in the oil pan 3 flows through pump 1, hollow input shaft 2 of reduction gear, the hollow pivot 8 of motor in proper order preceding drain-out oil port 15 and oil duct 6 and forms out the route, thereby coolant liquid in the oil duct 6 flows through the back row oil return port 16 of the hollow pivot 8 of motor in proper order, clearance, spline structure 4 and the oil pan 3 between the hole of the hollow pivot 8 of motor and the outer wall of the hollow input shaft 2 of reduction gear in proper order and forms back oil route, it forms the circulation closed circuit to go out oil route and back oil route intercommunication each other.
The electric drive assembly comprises a motor stator, a motor rotor, a motor hollow rotating shaft 8, a speed reducer hollow input shaft 2, a speed reducer intermediate shaft assembly 14, a speed reducer intermediate shaft assembly 13 and a speed reducer differential assembly 13, wherein the motor stator is located on the inner side of a motor shell 9, the motor rotor is located on the inner side of the motor stator, the motor hollow rotating shaft 8 of the motor rotor is supported on the motor shell 9 through a bearing, the speed reducer hollow input shaft 2 is supported on a speed reducer shell 11 through a bearing 10, a gear is meshed with the gear integrated on the speed reducer hollow input shaft 2 and is in splined connection with the speed reducer intermediate shaft assembly 14, the gear integrated on the speed reducer hollow input shaft 2 is meshed with another gear, and the gear is in splined connection with the speed reducer differential assembly 13.
The outer wall of the hollow input shaft 2 of the speed reducer of the embodiment is hermetically connected with the inner hole wall of the hollow rotating shaft 8 of the motor through a -th sealing ring 7 and a second sealing ring 5, and the -th sealing ring 7 and the second sealing ring 5 are located between the front oil outlet 15 and the rear oil return port 16.
According to the structural schematic diagram of the hollow rotating shaft 8 of the motor shown in fig. 4, the front oil outlet 15 and the rear oil return port 16 are respectively arranged at the front and the rear of the rotating shaft, oil can freely flow through the front oil outlet 15 and the rear oil return port 16, and the flow of cooling liquid according to the designed through-flow path is ensured through the sealing action of the -th sealing ring 7 and the -th sealing ring 7, so that the cooling effect is ensured.
The spline structure 4 of the embodiment comprises a spline arranged on the outer wall of the hollow input shaft 2 of the speed reducer and a second spline arranged on the inner hole wall of the hollow rotating shaft 8 of the motor, the hollow input shaft 2 of the speed reducer and the hollow rotating shaft 8 of the motor are fixedly connected through the spline and the second spline in a meshed mode, as shown in fig. 5, partial meshed teeth are removed from meshed parts on the spline and the second spline to form a through hole 18 for flowing through of cooling liquid.
As shown in fig. 2, the oil pan 3 of the present embodiment is fixed to the bottom of the reducer case in the electric drive assembly.
The pump 1 of the present embodiment is a mechanical pump or an electronic pump.
As shown by arrows in FIG. 3, the system operation principle and the cooling fluid circulation path (path 1 to path 9) are that the cooling fluid flows from the oil pan 3 through the pump 1 and enters the hollow input shaft 2 of the speed reducer from the oil outlet of the pump 1, the connection area adopts a sealing structure (i.e. -th sealing ring 7 and second sealing ring 5) to prevent oil leakage, the cooling fluid flows into the hollow rotating shaft 8 of the motor through the hollow input shaft 2 of the speed reducer, the hollow input shaft 2 of the speed reducer and the hollow rotating shaft 8 of the motor are connected by a spline without rotation speed difference, wherein the hollow rotating shaft 8 of the motor is circumferentially provided with a front oil outlet 15 and a rear oil return port 16 and is communicated with the oil duct 6 of the laminated core of the motor rotor, the cooling fluid flows into the oil duct 6 of the laminated core of the motor rotor from the front oil outlet 15 and flows into the hollow rotating shaft 8 of the motor again from the rear oil outlet, the cooling fluid flows into the oil return port 16 of the laminated core of the motor rotor through the spline 4 of the hollow input shaft 2 of the hollow rotating shaft 8 of the speed reducer by the second sealing ring , the cooling fluid is sealed and flows back into the hollow rotating shaft 3 to ensure that the hollow rotating shaft 15 of the motor rotor flows back through the hollow rotating shaft, the hollow rotating shaft 8, the heat exchange fluid flows back fluid and.
The cooling liquid of the embodiment is sucked into the hollow input shaft 2 of the speed reducer from the oil pan 3 through the pump 1, the cooling liquid can only flow out of the front oil outlet 15 of the hollow rotating shaft 8 of the motor and enter the oil duct 6 of the laminated core of the motor rotor due to the sealing action of the hollow input shaft 2 of the speed reducer and the -th sealing ring 7 and the second sealing ring 5 of the hollow rotating shaft of the motor rotor, the cooling liquid flows into the gap between the hollow input shaft 2 of the speed reducer and the hollow rotating shaft of the motor rotor from the rear oil outlet of the hollow rotating shaft 8 of the motor and flows back to the oil pan 3 through the bearing 10 at the front end of the hollow input shaft 2 of the speed reducer through the spline connection structure, and the cooling liquid exchanges heat among the hollow input shaft 2 of the speed reducer.
The laminated core of the motor rotor is formed by overlapping a plurality of rotor punching sheets.
The cooling system and the electric drive assembly structure of this embodiment carry out integration designs, the structure is highly integrated, cancel external oil duct and mounting structure, make the outer dimension of electric drive assembly more optimal design, the built-in oil duct 6 of this scheme designs in rotor sheet structure, make rotor sheet structure quality obviously reduce, get rid of partial meshing tooth at spline structure 4 of hollow rotating shaft simultaneously, improve the coolant liquid through-flow capacity under the prerequisite that does not influence spline joint strength, and reduce motor shaft quality, degree improvement motor's power density.
For external coolant liquid return circuit, this embodiment can be extended to the many oil ducts of electric motor rotor laminated core characteristic, greatly improves the heat transfer area of cold coolant liquid and electric motor rotor, improves cooling efficiency by a wide margin.
The embodiment can realize efficient cooling of the rotor of the driving motor to improve the performance of the electric drive assembly and reduce the installation size to ensure the integrated design of the electric drive assembly.
The scope of the present invention includes, but is not limited to, the above embodiments, and the present invention is defined by the appended claims, and any alterations, modifications, and improvements that may occur to those skilled in the art are all within the scope of the present invention.

Claims (5)

  1. The motor rotor cooling system of the electric drive assemblies is characterized by comprising a pump, an oil pan, a motor rotor and a hollow input shaft of a speed reducer, wherein the motor rotor comprises a motor rotor laminated core and a hollow motor rotating shaft fixed inside the motor rotor laminated core, an oil suction port of the pump is immersed in the oil pan, an oil outlet of the pump is hermetically connected with a end of the hollow input shaft of the speed reducer, the other end of the hollow input shaft of the speed reducer is inserted into an inner hole of the hollow motor rotating shaft, the hollow input shaft of the speed reducer is connected with the hollow motor rotating shaft through a spline structure, an oil duct is arranged inside the laminated core of the motor rotor, the hollow motor rotating shaft is respectively provided with a front oil discharge port and a rear oil return port which are communicated with two ends of the oil duct, the front oil discharge port is communicated with a end of the hollow input shaft of the speed reducer, and the rear oil return port is communicated with the oil pan through a gap between the inner hole of the hollow motor rotating shaft;
    thereby coolant liquid in the oil pan flows through pump, hollow input shaft of reduction gear, the preceding oil discharge port of the hollow pivot of motor and oil duct in proper order and forms out the oil route, thereby coolant liquid in the oil duct flows through the back row oil return mouth of the hollow pivot of motor, the hole of the hollow pivot of motor and the clearance between the outer wall of the hollow input shaft of reduction gear, spline structure and oil pan in proper order and forms back oil route, it forms the circulation closed circuit to go out oil route and back oil route intercommunication each other.
  2. 2. The electric motor rotor cooling system of the electric drive assembly of claim 1, wherein the outer wall of the hollow input shaft of the speed reducer is connected with the inner hole wall of the hollow rotating shaft of the electric motor in a sealing manner through a th sealing ring and a second sealing ring, and the th sealing ring and the second sealing ring are located between the front-row oil return opening and the rear-row oil return opening.
  3. 3. The electric motor rotor cooling system of the electric drive assembly as recited in claim 1, wherein the spline structure comprises a spline disposed on an outer wall of the hollow input shaft of the speed reducer and a second spline disposed on an inner wall of the hollow rotating shaft of the electric motor, the hollow input shaft of the speed reducer is fixedly connected with the hollow rotating shaft of the electric motor through the engagement of the spline and the second spline, and the engagement portion of the spline and the second spline removes part of the engaged teeth to form a through hole for the cooling fluid to flow through.
  4. 4. The electric motor rotor cooling system of the electric drive assembly of claim 1, wherein the oil sump is secured to a bottom portion of a reducer housing in the electric drive assembly.
  5. 5. The electric motor rotor cooling system of the electric drive assembly of claim 1, wherein the pump is a mechanical pump or an electronic pump.
CN201911034871.4A 2019-10-29 2019-10-29 Motor rotor cooling system of electric drive assembly Active CN110733334B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201911034871.4A CN110733334B (en) 2019-10-29 2019-10-29 Motor rotor cooling system of electric drive assembly
PCT/CN2020/084734 WO2021082360A1 (en) 2019-10-29 2020-04-14 Electric motor rotor cooling system of electric drive assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911034871.4A CN110733334B (en) 2019-10-29 2019-10-29 Motor rotor cooling system of electric drive assembly

Publications (2)

Publication Number Publication Date
CN110733334A true CN110733334A (en) 2020-01-31
CN110733334B CN110733334B (en) 2022-07-12

Family

ID=69271841

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911034871.4A Active CN110733334B (en) 2019-10-29 2019-10-29 Motor rotor cooling system of electric drive assembly

Country Status (2)

Country Link
CN (1) CN110733334B (en)
WO (1) WO2021082360A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112202259A (en) * 2020-09-29 2021-01-08 上海电气集团股份有限公司 Motor rotor cooling system and electric drive assembly
WO2021082360A1 (en) * 2019-10-29 2021-05-06 宁波菲仕运动控制技术有限公司 Electric motor rotor cooling system of electric drive assembly
CN112769268A (en) * 2020-12-30 2021-05-07 华为技术有限公司 Power transmission assembly and power assembly
CN116633081A (en) * 2023-06-02 2023-08-22 山东华东风机有限公司 Magnetic suspension high-speed blower with rotor spindle heat dissipation air duct

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113824248A (en) * 2021-08-13 2021-12-21 浙江零跑科技股份有限公司 Lubricating and heat-dissipating structure of extended-range generator assembly system

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102396133A (en) * 2009-04-17 2012-03-28 丰田自动车株式会社 Dynamo-electric machine
CN102723834A (en) * 2012-04-25 2012-10-10 山西北方机械制造有限责任公司 Permanent magnet synchronous motor
CN103975510A (en) * 2012-03-14 2014-08-06 株式会社小松制作所 Electric motor
CN206237264U (en) * 2016-12-02 2017-06-09 湖南天能电机制造有限公司 A kind of asynchronous machine elongate rotor soaks aluminum casting die
CN107659017A (en) * 2017-10-31 2018-02-02 合肥巨动力系统有限公司 A kind of structure for rotor cooling
DE102016215423A1 (en) * 2016-08-17 2018-02-22 Bayerische Motoren Werke Aktiengesellschaft Electric machine and vehicle with the electric machine
CN108462318A (en) * 2017-02-22 2018-08-28 蔚来汽车有限公司 Motor cooling, power motor and power drive system
CN109067092A (en) * 2018-08-28 2018-12-21 华中科技大学 A kind of rotor cooling structure
DE102018209340B3 (en) * 2018-06-12 2019-04-25 Bayerische Motoren Werke Aktiengesellschaft Operating strategy for a multi-phase system inverter of an electric drive unit for a motor vehicle
KR20190078900A (en) * 2017-12-27 2019-07-05 엠에이치기술개발 주식회사 Motor cooling apparatus and vehicle having the same
JP2019126237A (en) * 2018-01-19 2019-07-25 トヨタ自動車株式会社 Rotary electric machine
CN110176818A (en) * 2018-02-19 2019-08-27 丰田自动车株式会社 The rotor of rotating electric machine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5189325A (en) * 1990-06-15 1993-02-23 General Electric Company Liquid cooling the rotor of an electrical machine
US6727609B2 (en) * 2001-08-08 2004-04-27 Hamilton Sundstrand Corporation Cooling of a rotor for a rotary electric machine
JP2015089316A (en) * 2013-11-01 2015-05-07 トヨタ自動車株式会社 Rotary electric machine
CN207098801U (en) * 2017-05-22 2018-03-13 比亚迪股份有限公司 A kind of motor with cooling oil path
CN109038951B (en) * 2018-07-24 2020-04-14 上海大郡动力控制技术有限公司 Cooling structure of new energy automobile electric drive assembly
CN110733334B (en) * 2019-10-29 2022-07-12 宁波菲仕运动控制技术有限公司 Motor rotor cooling system of electric drive assembly

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102396133A (en) * 2009-04-17 2012-03-28 丰田自动车株式会社 Dynamo-electric machine
CN103975510A (en) * 2012-03-14 2014-08-06 株式会社小松制作所 Electric motor
CN102723834A (en) * 2012-04-25 2012-10-10 山西北方机械制造有限责任公司 Permanent magnet synchronous motor
DE102016215423A1 (en) * 2016-08-17 2018-02-22 Bayerische Motoren Werke Aktiengesellschaft Electric machine and vehicle with the electric machine
CN206237264U (en) * 2016-12-02 2017-06-09 湖南天能电机制造有限公司 A kind of asynchronous machine elongate rotor soaks aluminum casting die
CN108462318A (en) * 2017-02-22 2018-08-28 蔚来汽车有限公司 Motor cooling, power motor and power drive system
CN107659017A (en) * 2017-10-31 2018-02-02 合肥巨动力系统有限公司 A kind of structure for rotor cooling
KR20190078900A (en) * 2017-12-27 2019-07-05 엠에이치기술개발 주식회사 Motor cooling apparatus and vehicle having the same
JP2019126237A (en) * 2018-01-19 2019-07-25 トヨタ自動車株式会社 Rotary electric machine
CN110176818A (en) * 2018-02-19 2019-08-27 丰田自动车株式会社 The rotor of rotating electric machine
DE102018209340B3 (en) * 2018-06-12 2019-04-25 Bayerische Motoren Werke Aktiengesellschaft Operating strategy for a multi-phase system inverter of an electric drive unit for a motor vehicle
CN109067092A (en) * 2018-08-28 2018-12-21 华中科技大学 A kind of rotor cooling structure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021082360A1 (en) * 2019-10-29 2021-05-06 宁波菲仕运动控制技术有限公司 Electric motor rotor cooling system of electric drive assembly
CN112202259A (en) * 2020-09-29 2021-01-08 上海电气集团股份有限公司 Motor rotor cooling system and electric drive assembly
CN112202259B (en) * 2020-09-29 2021-06-11 上海电气集团股份有限公司 Motor rotor cooling system and electric drive assembly
CN112769268A (en) * 2020-12-30 2021-05-07 华为技术有限公司 Power transmission assembly and power assembly
CN116633081A (en) * 2023-06-02 2023-08-22 山东华东风机有限公司 Magnetic suspension high-speed blower with rotor spindle heat dissipation air duct

Also Published As

Publication number Publication date
WO2021082360A1 (en) 2021-05-06
CN110733334B (en) 2022-07-12

Similar Documents

Publication Publication Date Title
CN110733334B (en) Motor rotor cooling system of electric drive assembly
EP4002656B1 (en) Oil-water-cooled electric drive assembly and new energy automobile
CN1848620B (en) Fully-enclosed fan-cooled motor
CN106505791B (en) Motor, motor controller and speed reducing mechanism integrated structure
WO2021042465A1 (en) Oil-water double-cooling electric drive assembly, and new energy automobile
CN111697743A (en) Dual cooling assembly
CN112594357B (en) Oil cooling deep integrated electric drive system
WO2023010947A1 (en) Cooling and lubrication apparatus of electrical drive assembly, and electrical drive assembly
WO2024087601A1 (en) Hybrid electric drive system and hybrid vehicle
EP3657646A1 (en) Integrated central drive system
CN110808659A (en) Electric drive assembly
WO2024124820A1 (en) Cooling and lubricating apparatus for electric drive assembly, and electric drive assembly
WO2020032026A1 (en) Motor unit
EP3657645A1 (en) Integrated central drive system
CN111555554A (en) Electric oil pump assembly for carrying out oil cooling on motor and controller
JP4625597B2 (en) Vehicle cooling system
CN212063778U (en) Motor shell internal circulation integrated cooling system
CN212637140U (en) Motor rotor cooling system of electric drive assembly
CN114734799A (en) Shell structure of electric drive assembly and electric drive assembly
CN110323895B (en) Pure electric vehicles actuating system and driving motor oil cooling system thereof
CN111654144A (en) Highly integrated motor casing, electricity drive assembly and electric automobile
JP2000295818A (en) Liquid-cooled rotating machine
CN212811498U (en) Motor and controller contain electric oil pump assembly of cooling oil circuit
WO2023216031A1 (en) Housing structure of electric drive assembly, and electric drive assembly
CN218569996U (en) Integrated water-cooled motor based on water pump direct connection

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
GR01 Patent grant