CN108696039A - A kind of cooling devcie of motor - Google Patents
A kind of cooling devcie of motor Download PDFInfo
- Publication number
- CN108696039A CN108696039A CN201810552331.4A CN201810552331A CN108696039A CN 108696039 A CN108696039 A CN 108696039A CN 201810552331 A CN201810552331 A CN 201810552331A CN 108696039 A CN108696039 A CN 108696039A
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- Prior art keywords
- cooling
- end cover
- stator
- cooling duct
- cover
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a kind of cooling devcie of motor, including:Stator case, upper end cover and bottom end cover, stator case are equipped with the first opening and the second opening, are fixed with stator core on the madial wall of stator case, stator winding are wound on stator core, the both ends of stator winding are respectively first end and the second end;First end is corresponding with the first opening, and the second end is corresponding with the second opening;First cooling duct is arranged around stator winding;Upper end cover closing first is open and is internally provided with the second cooling duct for cooling down first end;Bottom end cover closing second is open and is internally provided with the third cooling duct for cooling down the second end.The cooling structure of the present invention inside and outside the end of stator winding by being both provided with cooling duct, to improve the cooling efficiency of stator winding end, it solves the problems, such as that stator winding end radiating condition is poor, reduces the risk of stator winding ablation, improve electrical machinery life.
Description
Technical field
The present invention relates to motor radiating technical field, especially a kind of cooling structure of driving motor for electric vehicle.
Background technology
Motor always has sub-fraction loss to be transformed into heat, it must pass through rotor, stator when carrying out energy conversion
Constantly heat is distributed using surrounding medium with motor housing.The motor feels hot, and there are rotor and stator two, rotor heating in source
Power it is not necessarily maximum, temperature is typically up to;Stator is made of silicon steel body and winding, not necessarily because of the larger temperature instead of volume
It is very high, but heating power is larger, and this is related with stator structure.
The power for being currently used in the motor of electric vehicle is increasing, and under the premise of efficiency is certain, motor feels hot is also got over
Come bigger.Therefore the cooling efficiency for how improving motor is also more and more important, and statistics finds that stator winding ablation phenomen is most of
It is happened at end position, motor mainstream cooling scheme is that water channel is arranged on the outside of motor housing at present, using the above scheme cannot
It effectively cools down for electronics end, to not can effectively solve the problem that stator winding end is generated because heat gathers
Stator winding ablation phenomen.
In addition, temperature sensor is typically located at stator winding end at present, since stator winding end temperature is higher than electricity
The temperature of machine stator and other positions of rotor causes temperature sensor that cannot really reflect the temperature of motor stator and rotor.Especially
It is the current domestic permanent magnet synchronous motor largely used, and rotor magnetic steel is more sensitive to temperature, when temperature is more than certain value, just
It will appear irreversible demagnetization, lead to motor failure.
Currently available technology mainly formulates motor so that the temperature value of stator winding end temperature sensor measurement is foundation
Limit power and limited torque strategy.Such as 180 DEG C of magnet steel heatproof, when temperature sensor measurement stator winding end temperature reaches 160
DEG C when (stay 20 DEG C of safe clearances), begin to limiting motor power and torque, with reduce fever, to ensure magnet steel temperature only
Temperature demagnetization.But it has a problem that, since stator winding end temperature cannot really reflect magnet steel temperature, magnet steel performance is caused not have
Have and is played to greatest extent.
Invention content
The object of the present invention is to provide a kind of cooling devcie of motor, and to solve deficiency in the prior art, it can enhance
The cooling effect of stator winding end.
The present invention provides a kind of cooling devcie of motor, including:Stator case, the stator case are equipped with the first opening
It is open with second, is fixed with stator core on the madial wall of the stator case, stator winding is wound on the stator core,
The both ends of the stator winding are respectively first end and the second end;The first end is corresponding with first opening,
The second end is corresponding with second opening;
First cooling duct is arranged in the inside of the stator case, first cooling duct around the stator around
Group setting;
Upper end cover, the upper end cover are fixedly connected with the stator case and close first opening, the upper end cover
It is internally provided with the second cooling duct for cooling down the first end;
Bottom end cover, the bottom end cover are fixedly connected with the stator case and close second opening, the bottom end cover
It is internally provided with the third cooling duct for cooling down the second end.
Cooling devcie of motor as described above, wherein preferably, the upper end cover includes upper end cover cover board and to described
The upper end cover cooling end that first end extends, the upper end cover cover board are fixed on the stator case and close described first and open
Mouthful, second cooling duct is arranged inside the upper end cover cooling end.
Cooling devcie of motor as described above, wherein preferably, the bottom end cover includes bottom end cover cover board and to described
The bottom end cover cooling end that the second end extends;The bottom end cover cover board is fixed on the stator case and closes described second and opens
Mouthful, the third cooling duct is arranged inside the bottom end cover cooling end.
Cooling devcie of motor as described above, wherein preferably, the upper end cover cooling end and bottom end cover cooling
Portion is in the form of a column, and second cooling duct is along the circumferentially extending of the side of the upper end cover cooling end, the third cooling
Channel along bottom end cover cooling end side circumferentially extending.
Cooling devcie of motor as described above, wherein preferably, the upper end cover cooling end and bottom end cover cooling
Weight loss groove is both provided in portion.
Cooling devcie of motor as described above, wherein preferably, the stator core includes left part and right part,
The left part is corresponding with first opening, and the right part is corresponding with second opening;The upper end cover cooling
The minimum value of the end in portion to the distance of the left part is 5-7mm;The end of the bottom end cover cooling end to the right part
Distance minimum value be 5-7mm;The minimum value of the lateral wall of the upper end cover cooling end to the first end distance is 5-
The minimum value of 7mm, lateral wall to the second end distance of the bottom end cover cooling end are 5-7mm.
Cooling devcie of motor as described above, wherein preferably, first cooling duct has helical rib.
Cooling devcie of motor as described above, wherein preferably, first cooling duct includes along stator case
The first intermediate connection tube road that the multiple first pipes being axially distributed are connected to by each first pipe.
Cooling devcie of motor as described above, wherein preferably, first cooling duct includes multiple along stator case
The second intermediate connection tube road that the second pipe of body circumferentially extending is connected to by each second pipe.
Cooling devcie of motor as described above, wherein preferably, the stator case is equipped with respectively with described first
The the first coolant inlet pipe and the first coolant outlet that the both ends of cooling duct are connected;
The second coolant inlet pipe being connected with the both ends of second cooling duct is respectively equipped on the upper end cover
With the second coolant outlet;
The third coolant inlet being connected with the both ends of the third cooling duct is respectively arranged on the bottom end cover
Pipe and third coolant outlet;
The first coolant inlet pipe, first coolant outlet, the second coolant inlet pipe, described
Two coolant outlets, the third coolant inlet pipe and the third coolant outlet are connected each other by outer connecting pipe
It is logical.
Compared with prior art, cooling structure of the invention inside and outside the end of stator winding by being both provided with
Cooling duct solves the problems, such as that stator winding end radiating condition is poor to improve the cooling efficiency of stator winding end,
The risk of stator winding ablation is reduced, electrical machinery life is improved.And it avoids stator winding end temperature after cooling and is higher than
It is big to solve the end warming measurement temperature value of stator winding and rotor true temperature difference for the intermediate position of stator winding
Problem, balanced motor internal temperature, keeps measurement more acurrate true.Refer under the premise of temperature sensor measurement temperature value is more acurrate
Fixed rational motor limit power and limited torque strategy, and then give full play to magnet steel performance.
Description of the drawings
Fig. 1 is the structural schematic diagram of cooling devcie of motor provided in an embodiment of the present invention;
Fig. 2 is the structural schematic diagram of the first cooling duct in cooling devcie of motor provided in an embodiment of the present invention;
Fig. 3 is the sectional view of stator case in cooling devcie of motor provided in an embodiment of the present invention;
Fig. 4 is the structural schematic diagram of cooling devcie of motor provided in an embodiment of the present invention;
Fig. 5 is the stereogram of stator case in cooling devcie of motor provided in an embodiment of the present invention;
Fig. 6 is the stereogram of upper end cover in cooling devcie of motor provided in an embodiment of the present invention;
Fig. 7 is the internal structure schematic diagram of upper end cover in cooling devcie of motor provided in an embodiment of the present invention;
Fig. 8 is the stereogram of bottom end cover in cooling devcie of motor provided in an embodiment of the present invention;
Fig. 9 is the internal structure schematic diagram of bottom end cover in cooling devcie of motor provided in an embodiment of the present invention;
Figure 10 is the mounting structure schematic diagram of the second cooling duct in cooling devcie of motor provided in an embodiment of the present invention;
Reference sign:The first cooling ducts 10-, the second cooling ducts 20-, 30- thirds cooling duct, 1- stator cases
Body, 11- the first coolant inlet pipes, the first coolant outlets of 12-, 21- first ends, 22- the second ends, 3- upper end covers,
31- the second coolant inlet pipes, the second coolant outlets of 32-, 33- upper end cover cover boards, 34- upper end cover cooling ends, the lower ends 4-
Lid, 41- third coolant inlet pipes, 42- third coolant outlets, 43- bottom end cover cover boards, 44- bottom end cover cooling ends, 5- are fixed
Sub- iron core.
Specific implementation mode
The embodiments described below with reference to the accompanying drawings are exemplary, is only used for explaining the present invention, and cannot be construed to
Limitation of the present invention.
The embodiment of the present invention:As shown in Figure 1, a kind of cooling devcie of motor is disclosed, including the first cooling duct 10,
Two cooling ducts 20, third cooling duct 30, upper end cover 3, bottom end cover 4 and stator case 1, first cooling duct 10 are arranged
In the inside of stator case 1, the first cooling duct 10 is arranged and improves cooling efficiency in the inside of stator case 1, because such as
The lateral wall heat that cooling pipe is arranged in stator case 1 by fruit needs the shell of stator case 1 to carry out hot transmission, cooling effect
Rate is relatively low.
The stator case 1 is equipped with the first opening and the second opening, and the madial wall of the stator case 1 is fixed with stator
Iron core 5, the stator core 5 are interference fitted with the stator case 1.Stator winding, stator are wound on the stator core 5
The both ends of winding are respectively first end 21 and the second end 22, and the first end 21 is corresponding with first opening, institute
It is corresponding with second opening to state the second end 22;First end 21 and the second end 22 are stator winding along stator core
The position of 5 winding bendings, therefore the calorific value of first end and the second end 22 is higher than other positions;First cooling is logical
Road 10 is arranged around the stator winding;Preferably, the first cooling duct 10 covering width otherwise less than stator winding width
Degree, can enable the outside that the first cooling duct 10 is completely covered on stator winding comprehensively to cool down stator winding in this way.
Specifically, as shown in Figures 2 and 3, first cooling duct 10 is spiraled in the shape of a spiral in the inside of the stator case 1.When
Right first cooling duct 10 can also use other modes to arrange that in another embodiment, the first cooling duct 10 is designed as
Axial water channel, specifically, first cooling duct 10 includes multiple first pipes being axially distributed along stator case 1 and by phase
First intermediate connection tube road of adjacent two first pipe serial communications.The first cooling duct is designed as in a further preferred embodiment
Parallel water channel, specifically, first cooling duct 10 includes multiple second pipes circumferentially extended along stator case 1 and by phase
Second intermediate connection tube road of adjacent two second pipe serial communications.Second pipe, which circularizes, is coated with stator winding.Pass through
The design of one cooling duct 10 completes the cooling of stator winding lateral wall, and lateral wall mentioned here refers to stator winding close to fixed
The side of sub- shell 1.
As shown in fig. 7, second cooling duct 20 is arranged in the inside of upper end cover 3, the upper end cover 3 and the stator
Shell 1 is fixedly connected and closes first opening, after upper end cover 3 is fixed with the stator case 1,3 inside setting of upper end cover
Second cooling duct 20 it is opposite with 21 position of the first end, the second cooling duct 20 be used for first end 21 into
Row cooling;
As shown in figure 9, the third cooling duct 30, is arranged in the inside of bottom end cover 4, bottom end cover 4 has with upper end cover 3
Identical structure, the bottom end cover 4 are fixedly connected with the stator case 1 and close second opening, bottom end cover 4 and stator
Position and the second end 22 of the third cooling duct 30 are opposite after shell 1 is fixed, third cooling duct 30 for pair
The second end 22 cools down.
Since first end 21 and the second end 22 are position of the stator winding along the winding bending of stator core 5,
The calorific value of first end and the second end 22 is higher than other positions;It is only set on the outside of stator winding compared with the prior art
Cooling structure is set, the first cooling duct 10 and the second cooling duct 20 are separately positioned on the first end of stator winding by the application
21 inner side and outer side enhances the cooling effect of first end 21, solves to realize the double-sided cooled of stator winding
The problem of stator winding end radiating condition difference reduces the risk of stator winding ablation, improves electrical machinery life.And it avoids
21 temperature after cooling of first end is higher than the intermediate position of stator winding, solves the end warming measuring temperature of stator winding
Value and the big problem of rotor true temperature difference, balanced motor internal temperature, keep measurement more acurrate true.In temperature sensing
Rational motor limit power and limited torque strategy are specified under the premise of device measurement temperature value is more acurrate, and then give full play to magnet steel
Energy.
It is understood that as shown in Figure 4 and Figure 5, the both ends of first cooling duct 1 are connected separately with the first cooling
Liquid inlet tube 11 and the first coolant outlet 12;The first coolant inlet pipe 11 and first coolant outlet 12
It is fixed on the lateral wall of stator case 1;
As shown in Figure 4-Figure 7, the both ends of second cooling duct 20 are connected separately with 31 He of the second coolant inlet pipe
Second coolant outlet 32, the second coolant inlet pipe 31 and the second coolant outlet 32 are fixed on upper end cover 3;
As Figure 8-Figure 10, the both ends of the third cooling duct 30 are connected separately with 41 He of third coolant inlet pipe
Third coolant outlet 42, the third coolant inlet pipe 41 and third coolant outlet 42 are fixed on bottom end cover 4;
Second coolant outlet 32 is connected to by the first hose with the first coolant inlet pipe 11, and first is cold
But liquid outlet 12 is connected to by the second hose with the third coolant inlet pipe 41.Above-mentioned technical proposal keeps the first cooling logical
Road 10, the second cooling duct 20 and third cooling duct 30 are connected.Certain the first coolant liquid described in a further preferred embodiment
Inlet tube 11, the second coolant inlet pipe 31 and third coolant inlet pipe 41 are in parallel, first coolant outlet 12, the
Two coolant outlets 32 and third coolant outlet 42 are in parallel.
By the first hose and the second hose by the first cooling duct 10, the second cooling duct 20 and third cooling duct 30
It is together in series convenient for the flowing of coolant liquid, coolant inlet pipe is respectively arranged on stator case 1, upper end cover 3 and bottom end cover 4
Three cooling ducts of series connection are facilitated with coolant outlet.
Specifically, the upper end cover 3 includes upper end cover cover board 33 and the upper end cover cooling end to first end extension
34, the upper end cover cover board 33 is fixed on the first end of the stator case 1, and closes first opening, and described second is cold
But channel 20 is arranged inside the upper end cover cooling end 34;Preferably, the upper end cover cooling end 34 is in the form of a column, and described second
Along the circumferentially extending of the side of the upper end cover cooling end 34, the purpose designed in this way makes the second cooling duct for cooling duct 20
20 closer to first end.
Specifically, the bottom end cover 4 includes bottom end cover cover board 43 and the bottom end cover cooling end to the second end extension
44;The bottom end cover cover board 43 is fixed on the second end of the stator case 1 and closes second opening, and the bottom end cover is cold
But portion 44 is inserted into stator case 1, and the bottom end cover cooling end 44 is internally provided with third cooling as described above and leads to
Road 30.Preferably, the bottom end cover cooling end 44 is in the form of a column, and the third cooling duct 30 is along the bottom end cover cooling end 44
Side circumferentially extending.
After the upper end cover cover board 33 of the upper cover plate 3 is fixed on stator case 1, upper end cover cooling end 34 is inserted into fixed
In the internal cavities of sub- shell 1,34 threshold value stator core 5 of upper end cover cooling end has a fixed gap, upper end cover cooling at this time
34 side wall of portion also has a fixed gap apart from stator winding.Specifically, the stator core 5 includes left part and right part, it is described
Left part is corresponding with first opening, and the right part is corresponding with second opening;The upper end cover cooling end 34
End to the left part distance minimum value L1 be 5-7mm;The lateral wall of the upper end cover cooling end 34 is to first end
Distance minimum value L2 be 5-7mm.Ensure that L1 and L2 not only can guarantee motor insulation performance in reasonable range, but also can be more preferable
To being cooled down inside stator winding end and motor.
Likewise, the minimum value L3 of distance of 44 side wall of bottom end cover cooling end to the right part is 5-7mm, it is described
The minimum value L4 of the lateral wall of bottom end cover cooling end 44 to 22 distance of the second end is 5-7mm.
Further, in order to mitigate the weight of cooling devcie of motor, the upper end cover cooling end 34 and bottom end cover cooling end
44 centre positions are both provided with weight loss groove.
The structure, feature and effect of the present invention, the above institute are described in detail based on the embodiments shown in the drawings
Only presently preferred embodiments of the present invention is stated, but the present invention is not to limit practical range, every structure according to the present invention shown in drawing
Change made by thinking, or is revised as the equivalent embodiment of equivalent variations, when not going beyond the spirit of the description and the drawings,
It should all be within the scope of the present invention.
Claims (10)
1. a kind of cooling devcie of motor, which is characterized in that including:
Stator case, the stator case are equipped with the first opening and the second opening, are fixed on the madial wall of the stator case
There is stator core, stator winding is wound on the stator core, the both ends of the stator winding are respectively first end and
Two ends;The first end is corresponding with first opening, and the second end is corresponding with second opening;
First cooling duct is arranged in the inside of the stator case, and first cooling duct is set around the stator winding
It sets;
Upper end cover, the upper end cover is fixedly connected with the stator case and closes described first and is open, inside the upper end cover
It is provided with the second cooling duct for cooling down the first end;
Bottom end cover, the bottom end cover is fixedly connected with the stator case and closes described second and is open, inside the bottom end cover
It is provided with the third cooling duct for cooling down the second end.
2. cooling devcie of motor according to claim 1, it is characterised in that:The upper end cover include upper end cover cover board and to
The upper end cover cooling end that the first end extends, the upper end cover cover board are fixed on the stator case and close described the
One opening, second cooling duct are arranged inside the upper end cover cooling end.
3. cooling devcie of motor according to claim 2, it is characterised in that:The bottom end cover include bottom end cover cover board and to
The bottom end cover cooling end that the second end extends;The bottom end cover cover board is fixed on the stator case and closes described
Two openings, the third cooling duct are arranged inside the bottom end cover cooling end.
4. cooling devcie of motor according to claim 3, it is characterised in that:The upper end cover cooling end and the bottom end cover
Cooling end is in the form of a column, and second cooling duct is along the circumferentially extending of the side of the upper end cover cooling end, the third
Cooling duct along the side of the bottom end cover cooling end circumferentially extending.
5. cooling devcie of motor according to claim 4, it is characterised in that:The upper end cover cooling end and the bottom end cover
Weight loss groove is both provided on cooling end.
6. cooling devcie of motor according to claim 4, it is characterised in that:The stator core includes left part and right end
Portion, the left part is corresponding with first opening, and the right part is corresponding with second opening;The upper end cover is cold
But the minimum value of the end in portion to the distance of the left part is 5-7mm;The end of the bottom end cover cooling end is to the right end
The minimum value in portion is 5-7mm;The minimum value of the lateral wall of the upper end cover cooling end to the first end distance is 5-7mm,
The minimum value of the lateral wall of the bottom end cover cooling end to the second end distance is 5-7mm.
7. cooling devcie of motor according to claim 1, it is characterised in that:First cooling duct has helical form shape
Shape.
8. cooling devcie of motor according to claim 1, it is characterised in that:First cooling duct includes along stator case
The first intermediate connection tube road that the multiple first pipes of body being axially distributed are connected to by each first pipe.
9. cooling devcie of motor according to claim 1, it is characterised in that:First cooling duct includes multiple along fixed
The second intermediate connection tube road that the second pipe of sub- shell circumferentially extending is connected to by each second pipe.
10. according to any cooling devcie of motor of claim 1-9, it is characterised in that:The stator case, which is equipped with, to be divided
The the first coolant inlet pipe and the first coolant outlet not being connected with the both ends of first cooling duct;
The second coolant inlet pipe being connected with the both ends of second cooling duct and are respectively equipped on the upper end cover
Two coolant outlets;
Be respectively arranged on the bottom end cover third coolant inlet pipe being connected with the both ends of the third cooling duct and
Third coolant outlet;
It is the first coolant inlet pipe, first coolant outlet, the second coolant inlet pipe, described second cold
But liquid outlet, the third coolant inlet pipe and the third coolant outlet are communicated with each other by outer connecting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810552331.4A CN108696039B (en) | 2018-05-31 | 2018-05-31 | Motor cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810552331.4A CN108696039B (en) | 2018-05-31 | 2018-05-31 | Motor cooling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108696039A true CN108696039A (en) | 2018-10-23 |
| CN108696039B CN108696039B (en) | 2020-05-05 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810552331.4A Active CN108696039B (en) | 2018-05-31 | 2018-05-31 | Motor cooling device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429762A (en) * | 2019-08-14 | 2019-11-08 | 浙江特种电机有限公司 | New-energy automobile ultra-high efficient motor cooling system loop structure and its installation method |
| CN111120409A (en) * | 2018-10-31 | 2020-05-08 | 杭州三花研究院有限公司 | Electronic water pump |
| CN112039263A (en) * | 2020-07-27 | 2020-12-04 | 珠海格力电器股份有限公司 | Stator winding end cooling structure and motor |
| CN113114004A (en) * | 2021-03-12 | 2021-07-13 | 安徽机电职业技术学院 | Hub motor heat abstractor |
| CN113659763A (en) * | 2021-08-19 | 2021-11-16 | 东南大学盐城新能源汽车研究院 | Modularized motor axial stator cooling structure |
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| CN110429762B (en) * | 2019-08-14 | 2024-05-03 | 浙江特种电机有限公司 | New energy automobile motor cooling system loop structure and installation method thereof |
| CN112039263A (en) * | 2020-07-27 | 2020-12-04 | 珠海格力电器股份有限公司 | Stator winding end cooling structure and motor |
| CN113114004A (en) * | 2021-03-12 | 2021-07-13 | 安徽机电职业技术学院 | Hub motor heat abstractor |
| CN113659763A (en) * | 2021-08-19 | 2021-11-16 | 东南大学盐城新能源汽车研究院 | Modularized motor axial stator cooling structure |
| CN113659763B (en) * | 2021-08-19 | 2022-07-12 | 东南大学盐城新能源汽车研究院 | Modularized motor axial stator cooling structure |
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