CN108321974A - A kind of electric vehicle motor damping maintenance process - Google Patents
A kind of electric vehicle motor damping maintenance process Download PDFInfo
- Publication number
- CN108321974A CN108321974A CN201810210278.XA CN201810210278A CN108321974A CN 108321974 A CN108321974 A CN 108321974A CN 201810210278 A CN201810210278 A CN 201810210278A CN 108321974 A CN108321974 A CN 108321974A
- Authority
- CN
- China
- Prior art keywords
- motor
- mounting ring
- deflector
- electric vehicle
- maintenance process
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
-
- 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
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- 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
- H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
-
- 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
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
- H02K2205/09—Machines characterised by drain passages or by venting, breathing or pressure compensating means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
-
- 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)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Motor Or Generator Frames (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention belongs to motor technology field, specifically a kind of electric vehicle motor damping maintenance process is symmetrically installed mounting ring in shell both sides；Bearing periphery ball connects one group of telescopic rod, and telescopic rod other end ball is connected on mounting ring inner ring；Mounting ring side mounting guiding board；Deflector is equipped with one group of arcuate socket；Arcuate socket is tilted from deflector outer ring to deflector side；Mounting ring outer ring is equipped with annular groove, and air bag is equipped in groove, and inside air bag is equipped with one group of damping spring；Mounting ring outer circle is equipped with T stage rank, and step both sides setting offset spring reduces the influence of motor shaft axial dipole field by the laterally disposed offset spring of mounting ring.The damping maintenance process of the present invention can reduce the collision between motor shaft and shell；After motor stalling simultaneously, using inertia so that motor stopping fan continues to radiate to motor；Deflector is set by outside, bottles up dust or water mist enters inside motor, improve the service life of motor.
Description
Technical field
The invention belongs to motor technology field, specifically a kind of electric vehicle motor damping maintenance process.
Background technology
Electric bicycle, refer to using accumulator as supplementary energy on the basis of ordinary bicycle, be mounted with motor, control
The Personal Transporter of the electromechanical integration of the control members such as device processed, accumulator, handle brake lever and display instrument system.
With the development of the society, electric bicycle is more and more universal, it has also become people's most common one kind of going on a journey is ridden instead of walk work
Tool.The motor of electric vehicle in the market is generally used exposed or partial occlusion mode to solve its heat dissipation, heat dissipation effect
Difference；After the installation of existing motor, the shaft and shell of motor are hard contact, after prolonged use to the abrasion of motor bearings compared with
Greatly；When even encountering sharp impacts, bearing damage or motor bending shaft may be caused；Existing motor radiating, only passes through wind
Fan heat dissipation just stops operating after motor stalling, and motor radiating efficiency straight line declines, and influences the service life of motor；Simultaneously with electricity
The aging of machine internal washer cannot effectively bottle up water mist or dust is entered by motor shaft in shell, serious to restrict making for motor
Use the service life.
Invention content
In order to make up for the deficiencies of the prior art, a kind of electric vehicle motor damping maintenance process proposed by the present invention, can subtract
Collision between small machine axis and shell；After motor stalling simultaneously, continues to export internal heat using inertia, improve motor
Service life；Deflector is set by outside, bottles up dust or water mist enters inside motor, improve the service life of motor.
The technical solution adopted by the present invention to solve the technical problems is：A kind of electric vehicle motor damping of the present invention
Maintenance process, the motor include motor shaft, stator, rotor, shell and bearing, which includes the following steps：
Step 1 is symmetrically installed mounting ring in shell both sides；Bearing periphery ball connects one group of telescopic rod, will rigidly connect
It connects and makes varied rigid link into, improve the impact resistance of bearing；The telescopic rod other end ball is connected on mounting ring inner ring；
Step 2, the mounting ring side mounting guiding board in step 1；The deflector is equipped with one group of arcuate socket；It is described
Arcuate socket is tilted from deflector outer ring to deflector side, and the seal aging of motor be easy to cause dust or water enters in motor
Portion causes the damage of motor；Deflector rotates, and is generated towards the air-flow on the outside of axis by arcuate socket, prevents water mist or dust
Into inside motor.
Step 3, the mounting ring outer ring is equipped with annular groove in step 2, and air bag, the gas are equipped in the groove
Capsule is internally provided with one group of damping spring, and using Multistage damping mechanism, damping vibration improves the shock resistance of motor.
Step 4, mounting ring outer circle is equipped with T stage rank in step 3, and the step both sides setting offset spring passes through
The laterally disposed offset spring of mounting ring reduces the influence of motor shaft axial dipole field.
The damping and maintenance of one to four achievable electric vehicle motor through the above steps, can significantly improve electric vehicle motor
Service life.
In step 2, the arcuate socket is set as 140-160 ° with deflector end plane angle；On the outside of described arcuate socket one end
Equipped with metal clips, when motor high-speed rotation, i.e., when electric bicycle is more than 20KM/h, shrapnel vibrates whistle, reminds user
Pay attention to slowing down.
Further include step 5, on the basis of step 4, is set there are one fan spindle bearing in inner walls；The fan shaft
Bearing outer-ring is connected in inner walls；The fan spindle bearing inner ring is equipped with one group of blade, and one of blade side is equipped with and matches
Pouring weight utilizes the centrifugal action of clump weight after motor stalling so that fan spindle bearing continues spin for some time, improves motor and stops
Radiating efficiency after turning, improves the service life of motor.
In step 5, the clump weight is internally provided with oil pocket；The clump weight is equipped with the micro-hole of connection bearing ball,
Due to clump weight so that fan spindle bearing eccentric rotary, the ball friction of clump weight side is larger, is added to the ball by micro-hole
Big injection flow reduces and is worn at this, improves the service life of fan spindle bearing.
Further include step 6, on the basis of step 5, the hull outside is equipped with one group of heat sink, outside the heat sink
Side is equipped with arc wing plate, is drained by arc wing plate, is radiated to shell using heat sink, improves comprehensive heat dissipation effect.
Beneficial effects of the present invention are as follows：
1. the damping maintenance process of the present invention is made into rigid connection semi-rigid by the way that telescopic rod is arranged on the outside of bearing
Connection, improves the impact resistance of bearing.
2. damping maintenance process of the present invention bottles up dust or water mist by the way that the arcuate socket towards outside is arranged in deflector
Into inside motor, the service life of motor is improved, and metal clips is equipped on the outside of arcuate socket one end, when electric bicycle is super
When fast, shrapnel vibrates whistle, and user is reminded to pay attention to the generation slowed down, avoided traffic accident.
3. clump weight is arranged by fan spindle bearing inner ring, using inertia so that motor stopping in damping maintenance process of the present invention
Fan continues to radiate to motor.
Description of the drawings
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is the structure chart of the present invention；
Fig. 2 is the axonometric drawing of the present invention；
Fig. 3 is bearing of the present invention and mounting ring connection figure；
Fig. 4 is the deflector structure figure of the present invention；
In figure：Motor shaft 1, stator 2, rotor 3, shell 4, fan spindle bearing 41, blade 42, clump weight 43, micro-hole 431,
Heat sink 44, arc wing plate 45, bearing 5, telescopic rod 51, mounting ring 6, air bag 61, step 62, deflector 7, arcuate socket 71, gold
Belong to shrapnel 72, inflation unit 8, stomata 81, spring 82, gasket 83.
Specific implementation mode
In order to make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, tie below
Specific implementation mode is closed, the present invention is further explained.
As shown in Figures 1 to 4, a kind of electric vehicle motor damping maintenance process of the present invention, the motor include electricity
Arbor 1, stator 2, rotor 3, shell 4 and bearing 5, the damping maintenance process include the following steps：
Step 1 is symmetrically installed mounting ring 6 in 4 both sides of shell；5 periphery ball of the bearing connects one group of telescopic rod 51, will
Rigid connection makes varied rigid link into, improves the impact resistance of bearing 5；51 other end ball of the telescopic rod is connected on mounting ring 6
On inner ring；
Step 2, the 6 side mounting guiding board 7 of mounting ring in step 1；The deflector 7 is equipped with one group of arcuate socket
71；The arcuate socket 71 is tilted from 7 outer ring of deflector to 7 side of deflector, and the seal aging of motor be easy to cause dust or water
Into inside motor, the damage of motor is caused；Deflector 7 rotates, and is generated towards the air-flow on the outside of axis by arcuate socket 71, prevents
Sealing mist or dust enter inside motor.
Step 3,6 outer ring of the mounting ring is equipped with annular groove in step 2, and air bag 61, institute are equipped in the groove
It states air bag 61 and is internally provided with one group of damping spring, using Multistage damping mechanism, damping vibration improves the shock resistance of motor.
Step 4,6 outer circle of mounting ring is equipped with T stage rank 62 in step 3, and the setting of 62 both sides of the step deviates spring,
By 6 laterally disposed offset spring of mounting ring, the influence of 1 axial dipole field of motor shaft is reduced.
The damping and maintenance of one to four achievable electric vehicle motor through the above steps, can significantly improve electric vehicle motor
Service life.
In step 2, the arcuate socket 71 is set as 140-160 ° with 7 end plane angle of deflector；71 one end of the arcuate socket
Outside is equipped with metal clips 72, and when motor high-speed rotation, i.e., when electric bicycle is more than 20KM/h, shrapnel 72 vibrates whistle, carries
Awake user pays attention to slowing down.
Further include step 5, on the basis of step 4, is set there are one fan spindle bearing 41 in 4 inner wall of shell；The wind
41 outer ring of fan bearing is connected in 4 inner wall of shell；41 inner ring of the fan spindle bearing is equipped with one group of blade 42, and one of blade
42 sides are equipped with clump weight 43 and utilize the centrifugal action of clump weight 43 so that fan spindle bearing 41 continues rotation one after motor stalling
The section time improves radiating efficiency after motor stalling, improves the service life of motor.
In step 5, the clump weight 43 is internally provided with oil pocket；The clump weight is equipped with the miniature of connection bearing ball
Hole 431, due to clump weight 43 so that 41 eccentric rotary of fan spindle bearing, the ball friction of 43 side of clump weight is larger, by miniature
Hole 431 increases injection flow to the ball, reduces and is worn at this, improves the service life of fan spindle bearing 41.
Further include step 6, on the basis of step 5,4 outside of the shell is equipped with one group of heat sink 44, the heat dissipation
44 outside of plate is equipped with arc wing plate 45, is drained by arc wing plate 45, is radiated to shell 4 using heat sink 44, improved comprehensive
Close heat dissipation effect.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe the originals of the present invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (5)
1. a kind of electric vehicle motor damping maintenance process, the motor includes motor shaft (1), stator (2), rotor (3), shell
(4) and bearing (5), which is characterized in that the damping maintenance process includes the following steps：
Step 1 is symmetrically installed mounting ring (6) in the shell (4) both sides；In the bearing (5) periphery, ball connects one group of telescopic rod
(51), telescopic rod (51) other end ball is connected on mounting ring (6) inner ring；
Step 2, mounting ring (6) side mounting guiding board (7) in step 1；One group of arcuate socket is equipped on deflector (7)
(71), it bottles up dust or water mist enters inside motor, and the arcuate socket (71) is from deflector (7) outer ring to deflector (7)
Side tilts；
Step 3, mounting ring (6) outer ring in step 2 are equipped with annular groove, and air bag (61) is equipped in the groove, described
Air bag (61) is internally provided with one group of damping spring；
Step 4, mounting ring (6) outer circle in step 3 are equipped with T stage rank (62), step (62) the both sides setting offset
Spring；
The damping and maintenance of one to four achievable electric vehicle motor through the above steps, can significantly improve making for electric vehicle motor
Use the service life.
2. a kind of electric vehicle motor damping maintenance process according to claim 1, it is characterised in that：In step 2, institute
It states arcuate socket (71) and is set as 140-160 ° with deflector (7) end plane angle；Metal elastic is equipped on the outside of described arcuate socket (71) one end
Piece (72), when electric bicycle exceeds the speed limit, metal clips (72) vibrates whistle, and user is reminded to pay attention to slowing down.
3. a kind of electric vehicle motor damping maintenance process according to claim 1, it is characterised in that：Further include step 5,
On the basis of step 4, one fan spindle bearing (41) is installed in shell (4) inner wall；Fan spindle bearing (41) outer ring is connected
In shell (4) inner wall；Fan spindle bearing (41) inner ring is equipped with one group of blade (42), and one of blade (42) side is set
There is clump weight (43), using inertia so that motor stopping fan continues to radiate to motor.
4. a kind of electric vehicle motor damping maintenance process according to claim 3, it is characterised in that：In step 5, institute
It states clump weight (43) and is internally provided with oil pocket；The clump weight (43) is equipped with the micro-hole (431) of connection bearing (5) ball.
5. a kind of electric vehicle motor damping maintenance process according to claim 4, it is characterised in that：Further include step 6,
On the basis of step 5, one group of heat sink (44) is equipped on the outside of shell (4), heat sink (44) side is equipped with arc shaped wing
Plate (45).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810210278.XA CN108321974B (en) | 2018-03-14 | 2018-03-14 | A kind of electric vehicle motor damping maintenance process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810210278.XA CN108321974B (en) | 2018-03-14 | 2018-03-14 | A kind of electric vehicle motor damping maintenance process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108321974A true CN108321974A (en) | 2018-07-24 |
| CN108321974B CN108321974B (en) | 2019-08-02 |
Family
ID=62902508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810210278.XA Active CN108321974B (en) | 2018-03-14 | 2018-03-14 | A kind of electric vehicle motor damping maintenance process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108321974B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860124A (en) * | 2010-03-25 | 2010-10-13 | 重庆大学 | Hub shock absorption motor system |
| CN101882834A (en) * | 2009-12-26 | 2010-11-10 | 张建成 | Wheel electrical machine with water-cooling magnetic-damping stator winding |
| CN102545471A (en) * | 2012-02-24 | 2012-07-04 | 上海金桥中工电动叉车公司 | Double-function output motor |
| CN103825396A (en) * | 2014-01-03 | 2014-05-28 | 重庆大学 | Motor spindle vibration active control apparatus |
| CN104901468A (en) * | 2014-03-05 | 2015-09-09 | 泰州市华源电机有限公司 | Internally air-cooled variable-frequency motor |
-
2018
- 2018-03-14 CN CN201810210278.XA patent/CN108321974B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882834A (en) * | 2009-12-26 | 2010-11-10 | 张建成 | Wheel electrical machine with water-cooling magnetic-damping stator winding |
| CN101860124A (en) * | 2010-03-25 | 2010-10-13 | 重庆大学 | Hub shock absorption motor system |
| CN102545471A (en) * | 2012-02-24 | 2012-07-04 | 上海金桥中工电动叉车公司 | Double-function output motor |
| CN103825396A (en) * | 2014-01-03 | 2014-05-28 | 重庆大学 | Motor spindle vibration active control apparatus |
| CN104901468A (en) * | 2014-03-05 | 2015-09-09 | 泰州市华源电机有限公司 | Internally air-cooled variable-frequency motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108321974B (en) | 2019-08-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202029994U (en) | Rear-mounted boosting device with propeller | |
| CN201805342U (en) | Water cooling system for cylindrical permanent magnet speed regulation device | |
| CN107406134A (en) | Swimming and diving servicing unit | |
| CN108608850B (en) | A kind of battery component and its electric car | |
| CN108462283B (en) | A kind of electronic automobile-used shock-absorbing motor | |
| CN108321974B (en) | A kind of electric vehicle motor damping maintenance process | |
| CN105857093A (en) | Automobile wind collecting and power generating system | |
| CN201601542U (en) | Motor rotor with axial-flow fan blade of electric vehicle | |
| CN104638837A (en) | Motor | |
| CN110500293B (en) | Centrifugal compressor | |
| CN208489764U (en) | A kind of cooling structure of high-speed permanent magnetic generator | |
| CN218897135U (en) | Novel cooling device for wind driven generator | |
| CN202900581U (en) | External heat dissipation type direct connection portable type oilless air compressor | |
| CN205901501U (en) | Motor with thermal -insulated spoiler | |
| CN204465263U (en) | A kind of motor | |
| CN201810480U (en) | Centrifugal variable-pitch device for wind machines | |
| CN205559156U (en) | Take high -efficient wind energy conversion system of leading radome fairing | |
| CN215486702U (en) | Condensation axial flow fan for train air conditioner | |
| CN205945281U (en) | Rotor wind screen used for electric motor coach driving motor | |
| CN209313686U (en) | A kind of water proof type stepper motor shell | |
| CN208281386U (en) | A kind of birotor hydroelectric generator forging | |
| CN208870738U (en) | A kind of passive type yaw wind power generation plant | |
| CN207021840U (en) | A kind of motor with dual-cooled device | |
| CN207910627U (en) | A kind of Novel variable-frequency motor with cooling mechanism | |
| CN118100528B (en) | High-speed magnetic suspension motor cooling 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 | ||
| GR01 | Patent grant | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190712 Address after: Room A4, Exhibition Hall 2, Yiwu Commercial and Trade City, Longqiao District, Suzhou City, Anhui Province Applicant after: SUZHOU FUTURE NETWORK SCIENCE AND TECHNOLOGY CO., LTD. Address before: No. 31, Jiangzhuang Nanxiang, Nanguan Office, Suzhou City, Anhui Province Applicant before: Suzhou Xunchi Electronic Technology Co. Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191210 Address after: 221700 Fengxian County electric vehicle industry park, Jiangsu, Xuzhou Patentee after: Jiangsu Xincheng electric electric electric science and Technology Development Co., Ltd. Address before: Room A4, Exhibition Hall 2, Yiwu Commercial and Trade City, Longqiao District, Suzhou City, Anhui Province Patentee before: SUZHOU FUTURE NETWORK SCIENCE AND TECHNOLOGY CO., LTD. |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20180724 Assignee: Fengxian Huicheng Electric Vehicle Technology Co.,Ltd. Assignor: JIANGSU XINCHENG ELECTRIC VEHICLE TECHNOLOGY DEVELOPMENT Co.,Ltd. Contract record no.: X2021980016015 Denomination of invention: A damping maintenance method for electric vehicle motor Granted publication date: 20190802 License type: Exclusive License Record date: 20211223 |