CN108270301A - A kind of stator structure and its motor with winding overhang cooling structure - Google Patents
A kind of stator structure and its motor with winding overhang cooling structure Download PDFInfo
- Publication number
- CN108270301A CN108270301A CN201810074462.6A CN201810074462A CN108270301A CN 108270301 A CN108270301 A CN 108270301A CN 201810074462 A CN201810074462 A CN 201810074462A CN 108270301 A CN108270301 A CN 108270301A
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- China
- Prior art keywords
- stator
- winding
- cooling
- winding overhang
- motor
- Prior art date
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Classifications
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- 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
Abstract
The invention discloses a kind of stator structure and its motor with winding overhang cooling structure, which includes：Stator core, winding and stator embedding structure, winding is fixed on stator core, stator embedding structure is potted the slot internal pore and winding overhang of stator core fixation by using un-conducted magnetic material and forms, there are toroidal cavity, cooling liquid inlet and cooling liquid outlet in stator embedding structure, toroidal cavity is close to winding overhang；The coolant circulated is passed through into toroidal cavity by cooling down import and cooling liquid outlet, realizes winding overhang cooling.There is the end part cooling structure that the present invention carries winding to fix, insulating effect, the coolant circulated directly contacts in the toroidal cavity of end with winding, heat dissipation effect can be obviously improved, and the cooling structure can be prepared with existing dosing technology, it is simple in structure, it is easily manufactured and small to influence on Harmonic Armature.
Description
Technical field
The invention belongs to technical field of motors, more particularly, to a kind of stator knot with winding overhang cooling structure
Structure and its motor.
Background technology
In recent years, due to the non-renewable and increasingly serious environmental problem of fossil energy, the research and development of electric vehicle
Paid attention to by scholars and automobile vendor, the relevant technologies also achieve significant progress.Existing electric vehicle mainly uses
Centralized driving system, i.e. driving motor are located at vehicle interior, and wheel is outputted power to by transmission system；It is on the other side to be
Motor, i.e., be directly mounted in wheel by In-wheel-motor driving system.
Compared with conventional ADS driving mode, In-wheel-motor driving system has many-sided advantage：(1) it is simple in structure, it eliminates multiple
Miscellaneous machine driven system simplifies chassis structure, greatly increases interior space, promotes riding comfort；(2) vehicle can be realized
Electric braking improves energy utilization rate；(3) each wheel hub motor is individually controllable, can improve turn inside diameter flexibility, saves differential dress
It puts.
Although In-wheel motor driving system has many advantages, such as, there are still some problems restricts its development and extensively should
With：(1) wheel hub motor needs to be mounted on space in wheel, and the structure size of wheel hub defines the outer diameter of motor and the suspension of automobile fills
It puts, limits its axial length so that wheel hub motor has small demand；(2) wheel hub motor is located in wheel, can increase
The unsprung mass of automobile influences riding comfort, ride performance and the manipulation stability of automobile, thus to motor quality very
It is sensitive；(3) deceleration device is not present in the wheel hub motor directly driven, needs to export larger torque, and motor is located in wheel hub, radiates
Condition is more severe.
Since wheel hub motor is frequently with outer-rotor structure, in new-energy automobile common infiltration type oil cooling it is close to face dynamic
The problem of envelope is difficult, thus using less in wheel hub motor.Existing most of wheel hub motor cooling systems are the shell in motor
Circulation waterway in body is set or while circulation waterway is set, increases water cooling harden structure in end.Direct-drive type wheel hub motor category
In low speed high torque application scenario, larger torque-demand causes copper wastage to significantly improve, and winding becomes the main heat of motor
Source.During using only circulation waterway, winding particularly winding overhang does not contact directly with coldplate, need to be conducted by iron core, dissipates
The thermal efficiency is low, there are problems that hot-spot, can directly affect motor operation safety and service life；Install end water cooling harden structure additional
End heat dissipation problem can be solved, but larger eddy-current loss may be caused, and motor weight can be increased.As why not increased system
Under the premise of complexity and weight, the big technological difficulties that effective heat dissipation is wheel hub motor are carried out.
In terms of comprehensive, wheel hub motor has high torque density, the feature of high power density and has very high want to cooling system
It asks.
Structure diagrams of the Fig. 1 for the wheel hub motor of novel cooling manner, drive end bearing bracket 1 and 2 phase of housing of the wheel hub motor
Connection.Rotor 3 is installed on the inner circle of housing 2.Stent 5 is located at 4 inner circle of stator, supports simultaneously fixed stator 4.Stent 5 passes through
Bearing 8 is connect with shaft 7.Shaft 7 is connect by bolt with the rear end cap 6 on the right side of motor.One end carries end plate cylindrical shape
Stent 5 in be equipped with coolant flow channel, filled with cooling medium in coolant flow channel.The cylindrical section outer wall of stator core inner wall and stent 5
Contact, stator winding end are contacted with facade in 5 end plate of stent.Coolant flow channel is located at the cylindrical section wall surface of stent and stent end plate
Interior, two parts coolant flow channel is connected by intercommunicating pore.The wheel hub motor is suitable for New energy automobile motor and external rotor electric machine.So
And the wheel hub motor has the disadvantage that：
(1) although can realize preferable cooling effect to stator core and winding overhang using the wheel hub motor,
Cooling device considerably increases the complexity of system, improves processing, assembly difficulty；
(2) understand that Electric Motor Wheel performance is very sensitive to the weight of system by technical background, the cooling device of the wheel hub motor
System overall weight is significantly increased, may be decreased the comfort of vehicle, braking, steering behaviour；
(3) stent end plate may generate larger eddy-current loss with the mode that winding overhang is in direct contact, and reduce motor
Efficiency and end can only directly cool down the end of one side, and end side there will still likely be overheat condition.
Fig. 2 is the structure diagram of electric motor winding end cooling structure, and the electric motor winding end cooling structure is using isolation
Sleeve 4 forms seal cavity with casing 1, end cap 5, cooling oil is full of in end part seal space, and end cap is equipped with oil inlet and outlet,
By being connected with external pump 7, radiator 8, circulation oil-cooling circuit is formed, is effectively radiated.However, the electric motor winding end cools down
Structure has the disadvantage that：
(1) although electric motor winding end cooling structure obtains relatively good cooling effect using the mode of direct oil cooling,
It is that very high requirement is proposed to the cooperation and sealing of distance sleeve and each building block of casing, is susceptible to coolant leakage and asks
Topic；
(2) distance sleeve structure is located between the stator and rotor of motor so that the gas length of motor greatly increases, and reduces
Motor performance, and propose very high requirement to machining accuracy；
(3) overall weight that a large amount of coolants not only increase Electric Motor Wheel is filled in larger cooling cavity, and is needed
Pump, the radiator of large capacity are equipped with, substantially increases the cost of cooling system.
Invention content
For the disadvantages described above or Improvement requirement of the prior art, the present invention provides one kind to have winding overhang cooling structure
Stator structure, its object is to solve cooling structure in existing motor, can not to take into account simple in structure and cooling performance good
Technical problem.
To achieve the above object, the present invention provides a kind of stator structure with winding overhang cooling structure, including：
Stator core, winding and stator embedding structure, the winding are fixed on stator core, and stator embedding structure passes through
Fixation is potted to the slot internal pore and winding overhang of stator core using un-conducted magnetic material to form, in stator embedding structure
There are toroidal cavity, cooling liquid inlet and cooling liquid outlets, and toroidal cavity is close to winding overhang；By cooling down import and coolant
The coolant for being passed through and circulating into toroidal cavity is exported, realizes winding overhang cooling.
Preferably, the part cavity wall surface of toroidal cavity is made of winding overhang.
Preferably, toroidal cavity is located in the annulus of performed winding end part or positioned at winding overhang side or wrapping
Entire winding overhang.
As another aspect of the present invention, the present invention provides a kind of based on the above-mentioned stator with winding overhang cooling structure
Motor, including：Stator and rotor with winding overhang cooling structure.
The present invention proposes a kind of slotless wheel hub motor, and its object is to meet wheel hub motor miniaturization, lightweight demand
Meanwhile overcome in existing wheel hub motor heat dissipation technology winding heat transfer often, heat dissipation is difficult and cooling system is complicated, dead weight
The problem of big.
To achieve the above object, the present invention provides a kind of wheel hub motor based on above-mentioned stator, including：With winding terminal
Stator, stator support, rotor field spider and the magnet steel of portion's cooling structure；Stator with winding overhang cooling structure is located at stator branch
On frame, magnet steel is located on rotor field spider, and stator support is used to connect with suspension bridge, and rotor field spider is connected with shaft.
Preferably, stator core is slotless iron core.
Preferably, insulation framework is nested on stator core, is provided with slot on skeleton, skeleton is for fixing winding and absolutely
Edge.
Preferably, magnet steel magnetizes for Halbach array.
In general, by the above technical scheme conceived by the present invention compared with prior art, it can obtain down and show
Beneficial effect：
1st, stator structure provided by the invention, on the basis of existing encapsulating winding structure, close to winding overhang around
Setting toroidal cavity, cooling liquid inlet and cooling liquid outlet on group embedding structure, will be cold by cooling liquid inlet, cooling liquid outlet
But in liquid injection toroidal cavity, winding, good cooling results are directly cooled down, and the cooling structure is manufactured using existing encapsulation technology,
Preparation process is simple, and setting is used for the toroidal cavity of cooling in embedding part, small on the influence of motor self structure, can
Winding overhang cooling effect is improved in the case where ensureing that motor performance is constant.
2nd, stator structure provided by the invention can adapt to different structure stator, be widely used.
3rd, wheel hub motor provided by the invention, using the stator with winding overhang cooling structure, coolant and winding terminal
Portion is in direct contact and in end portion cavity internal circulation flow, can fast and effeciently take away the heat of winding generation, be obviously improved
The heat-sinking capability of motor drops low-temperature-rise, ensure that safe operation when motor is long, and simple in structure will not increase additional cooling structure
And weight.
Description of the drawings
Fig. 1 is the structure diagram of the wheel hub motor of novel cooling manner in background technology；
Fig. 2 is the structure diagram of electric motor winding end cooling structure in background technology；
Fig. 3 is the schematic diagram of winding overhang cooling structure provided by the invention；
Fig. 4 (a) is the schematic diagram of the stator structure provided by the invention with Distributed Winding end part cooling structure；Fig. 4 (b)
Schematic diagram for the stator structure provided by the invention with concentratred winding end part cooling structure；
Fig. 5 is the sectional view of wheel hub motor provided by the invention；
Fig. 6 is the partial enlarged view of stator structure in wheel hub motor provided by the invention；
Fig. 7 is the magnetizing schematic diagram of wheel hub motor provided by the invention；
Fig. 8 is the stator structure explosive view of wheel hub motor provided by the invention.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below that
Conflict is not formed between this to can be combined with each other.
Fig. 3 is the schematic diagram of winding overhang cooling structure provided by the invention, after winding inserting, usually using non-magnetic
Material is potted winding, such as epoxy resin, plays the role of winding and fixes and insulate, the embedding with conventional motors is not
Together, the encapsulating winding that the present invention carries motor is not solid construction, and in embedding, a ring has respectively been made in winding both side ends
Shape cavity 103, part cavity wall are made of winding overhang, the coolant full of heat conduction, insulation in toroidal cavity, such as transformation
Device oil, respectively has a pair of of cooling liquid inlet 101 and cooling liquid outlet 102, the cooling liquid inlet 101 and coolant in embedding part both sides
Outlet is connect with toroidal cavity to be led to, and external radiator and oil pump are connected to by pipeline.Coolant is directly contacted with winding,
Good cooling results, and embedding part preparation method is simple.
Winding overhang cooling structure proposed by the present invention is equally applicable to various slot machines, and Fig. 4 (a) is provided for the present invention
The stator structure with Distributed Winding end part cooling structure schematic diagram, the end of Distributed Winding is space in a circumferential direction
Camber line directly can form toroidal cavity in winding overhang formation toroidal cavity, embedding using end gap.Fig. 4 (b) is this hair
The schematic diagram of the stator structure with concentratred winding end part cooling structure of bright offer, the radial section of concentratred winding end is real
Core structure, when embedding, can in advance interspace in the side of winding or directly embedding forms c-type cavity, by end package wherein.It is logical
The coolant in the cavities full of cycle is crossed, end embedding structure has not only acted as original fixation, insulating effect, can also be right
Winding carries out direct infiltration type oil cooling, substantially increases motor radiating ability, has the function that promote torque output capability.
The present invention proposes a kind of wheel hub motor.Fig. 5 show the overall structure sectional view of motor.Wheel hub motor includes turning
Submounts 6, stator support 4, magnet steel 5, stator yoke 3 and the winding 2 with embedding part 1.Rotor field spider 6 is with stator support 4
Light metal alloys material；The inorganic shell structure of motor, rotor field spider 6 are equipped with bearing 7, and rotor field spider 6 passes through bolt and shaft 8
It is connected, the direct fixed car wheel hub in outside and tire construction；Stator support 4 is then secured by bolts in suspension bridge.
Fig. 6 is the partial enlarged view of stator structure in above-mentioned wheel hub motor, and winding 2 is wound on stator core 1, in winding
2 ends have toroidal cavity, and the cavity on embedding part 3 is set in the toroidal cavity of winding overhang, is made full use of inside winding
Space ensures to improve the cooling efficiency of winding terminal while motor performance.
The magnet steel 5 of wheel hub motor is fixed on 6 inside of rotor field spider, is magnetized using Halbach array, magnetizing direction is as schemed
Shown in 7.Conventional permanent magnet motor uses single radial magnetizing or cutting orientation magnetizing, thus air gap magnetic density waveform exists close to square wave
Larger harmonic content.One magnetic pole of Halbach array magnet steel is made of multiple units that magnetize, the magnetizing direction of each unit
Different, direction and size by adjusting the unit that respectively magnetizes, Halbach array can provide the air gap flux density wave close to sine
The air-gap flux of shape and bigger can effectively reduce eddy-current loss, improve torque output.In addition to this, Halbach array has
Have good magnetic screening action, rotor yoke thickness can be significantly reduced or even save rotor yoke, so as to reduce the weight of rotor and
The effective radius of one timing magnet steel of motor outer diameter increases therewith can further improve torque.
Wheel hub motor is formed without slotted stator core by silicon steel plate stacking, is nested on the outside of stator support, and Fig. 8 is shown
The explosive view of stator structure.It is different from conventional stator, carry the slotless configuration that stator is only yoke, and multi-pole motor
Yoke portion is very thin, thus iron core weight significantly reduces.Nesting secures one layer and is opened made of insulating materials on the outside of slotless iron core
Slot skeleton 9, the tooth socket number for number matching convention stator of slotting play the role of winding positioning and insulation.Because it is not deposited on stator
In tooth, only comprising one layer of yoke, and insulation framework 9 is very frivolous, close with conventional motor layer slot insulator thickness, it is possible to more
Space is made full use of, dramatically increases the section ratio of winding conductor, reduces copper wastage.It is further to consider, due to not by fixed
The influence of sub- iron core slotless saturation, the torque output capability of motor and the linearity of electric current are good, and overload capacity is strong.Except this it
Outside, because without slot effect, slotless wheel hub motor also has the advantages of torque pulsation is small.
It directly drives electronic wheel system and belongs to low speed high torque application scenario, copper loss is significantly higher than other loss ingredients.Because
Using Halbach array magnet steel, and there is no stator tooth slot structure, magnet steel loss and stator iron loss further reduce, so motor
Winding is the main heating source of slotless wheel hub motor.In cooling structure of the present invention, coolant and winding overhang be in direct contact and
End portion cavity internal circulation flow can fast and effeciently take away the heat of winding generation, be obviously improved the heat-sinking capability of motor,
Low-temperature-rise is dropped, ensure that safe operation when motor is long, and simple in structure will not increase additional cooling structure and weight.
In terms of comprehensive, the present invention carries slotless wheel hub motor, using Halbach array p-m rotor and non-groove stator knot
Structure significantly reduces motor effective weight, improves torque density, the overload capacity of motor, eliminates slot effect, improves torque
Smoothness reduces loss.There are toroidal cavities using winding overhang embedding for the type of cooling of motor, and cavity is interior to be cooled down full of insulation
Liquid is connected with external heat sink, pump, realizes circulation oil-cooling, circulation oil-cooling is realized while fixation, insulation, to as main heat
The winding in source is effectively radiated, and can reach splendid cooling effect, has simple in structure, light weight, without additional complexity
Cooling device the advantages of.In addition, winding overhang cooling structure air gap between stator and rotor provided by the invention does not influence,
Motor performance is not reduced while winding cooling effect can be improved.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all any modification, equivalent and improvement made all within the spirits and principles of the present invention etc., should all include
Within protection scope of the present invention.
Claims (8)
1. a kind of stator structure with winding overhang cooling structure, which is characterized in that filled including stator core, winding and stator
Seal structure, the winding are fixed on stator core, and stator embedding structure is by using un-conducted magnetic material to the slot of stator core
Internal pore and winding overhang are potted fixation and form, and there are toroidal cavity, cooling liquid inlets and cold in stator embedding structure
But liquid exports, and toroidal cavity is close to winding overhang；Recycle stream is passed through into toroidal cavity by cooling down import and cooling liquid outlet
Dynamic coolant realizes winding overhang cooling.
2. stator structure as described in claim 1, which is characterized in that the part cavity wall surface of toroidal cavity is by winding overhang structure
Into.
3. stator structure as claimed in claim 1 or 2, which is characterized in that toroidal cavity is located at the ring-type of performed winding end part
In space or positioned at winding overhang side or the entire winding overhang of wrapping.
4. a kind of motor of the stator structure based on described in claim 3, which is characterized in that including：It is cooled down with winding overhang
The stator and rotor of structure.
5. a kind of wheel hub motor of the stator structure based on described in claim 3, which is characterized in that including：With winding overhang
Stator, stator support, rotor field spider and the magnet steel of cooling structure；Stator with winding overhang cooling structure is located at stator support
On, magnet steel is located on rotor field spider, and stator support is used to connect with suspension bridge, and rotor field spider is connected with shaft.
6. wheel hub motor as claimed in claim 5, which is characterized in that stator core is slotless iron core.
7. wheel hub motor as claimed in claim 6, which is characterized in that insulation framework is nested on stator core, on skeleton
Slot is provided with, skeleton is used to fix winding and insulation.
8. such as claim 5 to 6 any one of them wheel hub motor, which is characterized in that magnet steel magnetizes for Halbach array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810074462.6A CN108270301B (en) | 2018-01-25 | 2018-01-25 | Stator structure with winding end cooling structure and motor thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810074462.6A CN108270301B (en) | 2018-01-25 | 2018-01-25 | Stator structure with winding end cooling structure and motor thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108270301A true CN108270301A (en) | 2018-07-10 |
| CN108270301B CN108270301B (en) | 2020-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810074462.6A Active CN108270301B (en) | 2018-01-25 | 2018-01-25 | Stator structure with winding end cooling structure and motor thereof |
Country Status (1)
| Country | Link |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768009A (en) * | 2018-07-27 | 2018-11-06 | 深圳市泉胜新技术开发有限公司 | A kind of automobile primary drives the stator core fixed structure of motor |
| CN109525056A (en) * | 2019-01-14 | 2019-03-26 | 苏州阿福机器人有限公司 | A kind of oil-cooled motor |
| CN110011456A (en) * | 2019-05-12 | 2019-07-12 | 苏州新智机电工业有限公司 | A kind of assembled piece type stator winding end wiring construction |
| WO2021147129A1 (en) * | 2020-01-21 | 2021-07-29 | 浙江绿源电动车有限公司 | Wheel hub motor having built-in charging system |
| CN113675966A (en) * | 2021-09-14 | 2021-11-19 | 宁波吉利罗佑发动机零部件有限公司 | Stator assembly, motor and motor cooling system |
| CN113872367A (en) * | 2021-09-22 | 2021-12-31 | 东风电驱动系统有限公司 | In-wheel motor |
| WO2023087728A1 (en) * | 2021-11-18 | 2023-05-25 | 东南大学 | Stator structure of magnetic levitation flux switching motor |
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| CN202309459U (en) * | 2011-10-27 | 2012-07-04 | 北京万源工业有限公司 | Permanent magnet direct-driven type synchronous wind-driven generator with outer rotor |
| CN105576863A (en) * | 2015-12-29 | 2016-05-11 | 哈尔滨理工大学 | Direct-cooling direct-drive type motor with copper tube structured stator |
| CN106961194A (en) * | 2016-01-12 | 2017-07-18 | 高学才 | Electric motor car slides wide range speed control permanent magnetism wheel hub electric motor certainly with Halbach birotors |
| CN206775255U (en) * | 2017-01-26 | 2017-12-19 | 上海蔚来汽车有限公司 | Stator module, Stator and electrical machine |
| CN107546895A (en) * | 2017-10-31 | 2018-01-05 | 佛山德玛特智能装备科技有限公司 | A kind of linear electric motors with good cooling effect |
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| CN202309459U (en) * | 2011-10-27 | 2012-07-04 | 北京万源工业有限公司 | Permanent magnet direct-driven type synchronous wind-driven generator with outer rotor |
| CN105576863A (en) * | 2015-12-29 | 2016-05-11 | 哈尔滨理工大学 | Direct-cooling direct-drive type motor with copper tube structured stator |
| CN106961194A (en) * | 2016-01-12 | 2017-07-18 | 高学才 | Electric motor car slides wide range speed control permanent magnetism wheel hub electric motor certainly with Halbach birotors |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768009A (en) * | 2018-07-27 | 2018-11-06 | 深圳市泉胜新技术开发有限公司 | A kind of automobile primary drives the stator core fixed structure of motor |
| CN109525056A (en) * | 2019-01-14 | 2019-03-26 | 苏州阿福机器人有限公司 | A kind of oil-cooled motor |
| CN110011456A (en) * | 2019-05-12 | 2019-07-12 | 苏州新智机电工业有限公司 | A kind of assembled piece type stator winding end wiring construction |
| WO2021147129A1 (en) * | 2020-01-21 | 2021-07-29 | 浙江绿源电动车有限公司 | Wheel hub motor having built-in charging system |
| CN113675966A (en) * | 2021-09-14 | 2021-11-19 | 宁波吉利罗佑发动机零部件有限公司 | Stator assembly, motor and motor cooling system |
| CN113675966B (en) * | 2021-09-14 | 2023-11-24 | 无锡星驱科技有限公司 | Stator assembly, motor and motor cooling system |
| CN113872367A (en) * | 2021-09-22 | 2021-12-31 | 东风电驱动系统有限公司 | In-wheel motor |
| WO2023087728A1 (en) * | 2021-11-18 | 2023-05-25 | 东南大学 | Stator structure of magnetic levitation flux switching motor |
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|---|---|
| CN108270301B (en) | 2020-06-26 |
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