CN106655563B - A kind of motor cooling and the inorganic shell motor with the structure - Google Patents
A kind of motor cooling and the inorganic shell motor with the structure Download PDFInfo
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- CN106655563B CN106655563B CN201611092294.0A CN201611092294A CN106655563B CN 106655563 B CN106655563 B CN 106655563B CN 201611092294 A CN201611092294 A CN 201611092294A CN 106655563 B CN106655563 B CN 106655563B
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- coldplate
- stator
- motor
- cooling
- teeth portion
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- 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
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a kind of motor coolings comprising：Coldplate, the coldplate includes the cooling medium stream road that inner wall is equipped with inwardly protruded teeth portion and the connection teeth portion, baffle is equipped in the teeth portion, to form teeth portion runner and be connected to the cooling medium stream road for connecting teeth portion, so that cooling medium can be flowed along the runner in coldplate, the cooling to stator is realized；Radiation tooth comprising heat dissipation root portion and radiation tooth teeth portion, the heat transfer for generating the machine winding are passed to coldplate, and by the cooling medium, realize the cooling to the stator and winding of the motor.The invention also discloses a kind of fractional-slot concentratred winding inorganic shell magneto with the cooling structure.The cooling structure of the present invention not only can cool down motor stator tooth and winding well, may be omitted with motor case, reduce motor volume and weight, further improve the power density of motor.
Description
Technical field
The invention belongs to motor cooling technologies, and in particular to a kind of motor cooling and with the inorganic of the structure
Shell motor.
Background technology
High power density motor is widely used in electric vehicle, aviation inspires motor etc. to have strictly motor volume and weight
It is required that occasion.This kind of motor is since with higher electromagnetic load, the loss of unit volume is very big, but heat dissipation area but phase
To reducing, therefore it is relatively difficult to radiate, and is cooled down to motor frequently with water cooling or the type of cooling of oil cooling, to prevent motor
The important components temperature such as winding and magnet steel liter is excessively high, to reduce electrical machinery life, influences safety and the economy of motor operation.
Concentratred winding motor, such as fractional-slot concentratred winding magneto and switched reluctance machines, one winding coil
It is wrapped on single stator tooth, relative to Distributed Winding motor, has winding construction simple, coiling is convenient, and winding overhang is shorter
The features such as, therefore, has and be widely applied very much foreground, especially there is the occasion of strict demand, researching value to motor size
It can bigger with application prospect.However, concentratred winding motor stator slot is bigger, and slot number is fewer, this can lead to groove center
Thermal resistance to stator core is bigger, and the heat generated in winding is difficult to be lost to the cooling medium being arranged in motor housing
In, this will be so that machine winding especially winding center has higher Wen Sheng.Limitation in this heat dissipation make concentrate around
Group motor thermic load cannot obtain it is too high, to limit its power density and application range.It is concentrated to further increase
The power density of winding electric machine widens the application range of its high power density occasion, the cooling problems demand solution of stator winding
Certainly.
Conventional motors are often fixed motor stator, protect and are cooled down using casing, but the use of casing increases
The volume of entire motor reduces the power density of motor, and since casing and iron core are often using the side of interference fit
Formula, this will increase the mechanical stress in iron core, and some researches show that the stress in iron core will will increase the iron loss of motor, reduce electricity
The efficiency and output of machine.Therefore, inorganic shell motor has prodigious advantage in power density and efficiency, has also obtained industrial quarters
Extensive concern and research.
In addition motor often forms stator core to reduce iron loss, between lamination in such a way that silicon steel sheet axially laminates
Gap will be such that axial thermal resistance increases, and axial heat conduction is difficult, this can cause the Wen Sheng at the axial intermediate position of stator core often
Excessively high, especially for the long motor of iron core axial length, this effect becomes apparent, it is therefore necessary to electric machine iron core
The form for taking axial segmentation cools down iron core inside.As shown in Figure 1, using circular ring shape water jacket outside stator core
Motor is cooled down, setting straight trough or spiral channel in casing, the heat that winding generates in stator first passes through heat transfer side
Formula passes to stator tooth and yoke portion, is then passed in water jacket by iron core and is taken away by water.
But motor is cooled down in the form of water channel is set in circular ring shape casing, winding heat source is relative to water jacket low-temperature receiver
Farther out, the conduction by core tooth part and yoke portion, this structure, winding central temperature and core tooth part temperature is needed all may be used
Can be higher, therefore cooling effect is limited, especially for the motor of ultra high power density, winding heat is difficult to be lost to cooling Jie
In matter.Further, since use water cooling casing, motor live part material, as the volume of silicon steel sheet will be restricted, and it is fixed
Can stress be generated due to the interference fit with casing in sub- iron core, to increase iron loss, power output is restricted.
In order to overcome the above problem, occur carrying out motor cooling technical side using trough inner water pipe in the prior art
Case.As shown in Fig. 2, water pipe is typically located between notch or two winding coil sides, the material of trough inner water pipe is generally led
The preferable stainless steel of hot property or copper.This type of cooling cooling water and winding heat source are lost closer to therefore with good
Cooling effect.
It is cooled down using trough inner water pipe, although having good cooling effect, in practical applications not extensively, because
It has the disadvantages that：
(1) supplying pipe is copper or stainless steel with high conductivity, under the action of slot leakage, especially notch cloth
The water pipe at place is set, bigger eddy-current loss may be will produce in water wall, reduce the efficiency of motor.
(2) trough inner water pipe occupies certain groove area, and the area that can place winding conducting wire reduces, therefore reduces
Motor copper factor, under same current, copper wastage increases, this counteract to a certain extent trough inner water Guan Suoneng bring it is cold
But effect.
(3) this type of cooling, structure is more complicated, and especially the Joining Technology of end water pipe is complicated.In addition, water pipe connects
It meets place and also has the problem of sealing leak.
(4) further, since using casing, motor live part material, as the volume of silicon steel sheet will be restricted, and
Can stress be generated due to the interference fit with casing in stator core, to increase iron loss, power output is restricted.
Invention content
For the disadvantages described above or Improvement requirement of the prior art, the present invention provides a kind of motor cooling and has the knot
The inorganic shell motor of structure, this cooling structure not only can cool down motor stator tooth and winding well, can also be saved
Motor case is removed, motor volume and weight are reduced, further improves the power density of motor.The present invention solve concentration around
The problem of group machine winding and stator tooth cooling difficulty.
To achieve the above object, according to one aspect of the present invention, a kind of motor cooling is provided, which is characterized in that
The cooling structure includes：
Coldplate, the coldplate include the cooling that inwardly protruded teeth portion and the connection teeth portion is arranged on inner wall
Medium runner, the teeth portion circumferentially spaced arrangement are groove portion between adjacent fingers, baffle, the gear are equipped in the teeth portion
The both sides of plate and the both sides of the teeth portion are spaced apart, the cooling medium stream to form teeth portion runner and with teeth portion is connect
Road is connected to so that cooling medium can be flowed along the teeth portion runner and cooling medium stream road in coldplate, be realized to stator
It is cooling；
Radiation tooth comprising heat dissipation root portion and radiation tooth teeth portion, heat dissipation root portion connect with the groove top of the groove portion, dissipate
Hot tooth teeth portion is used to be inserted into the center of stator slot, and the heat transfer for generating the machine winding passes through to coldplate
The cooling medium passes, and realizes the cooling to the stator and winding of the motor.
Further, the teeth portion planform of the coldplate is matched with the stator tooth planform of the motor so that
The cooling board slot that the coldplate teeth portion is just bonded with stator teeth, and is formed between coldplate teeth portion then with stator slot pair
It answers, so that the coldplate is installed between the stator.
Further, the coldplate periphery is equipped with bolt hole, in order to be assembled with the stator lasmination.
Further, the coldplate uses non-magnetic aluminium alloy or brass material.
Further, the radiation tooth teeth portion is axially provided with many cracks, for reduce due to stray field in stator slot and
The eddy-current loss of generation.
Further, the clamping of groove top portion or welding of the heat dissipation root portion and the coldplate.
Other side according to the invention, a kind of fractional-slot concentratred winding with the cooling structure of the decorum are inorganic
Shell magneto comprising multiple stator-core laminations and the annular for being set in the stator-core lamination formation with one heart are empty
Interior rotor, it is characterised in that：
The electric machine stator iron has been divided axially into four sections, and one piece of cooling is inserted between every two sections of stator-core laminations
Plate, each groove portion are respectively provided with the radiation tooth.
Further, it is not disposed with a coldplate in motor end part, End winding and coldplate teeth portion is made well to contact.
Further, the End winding of the motor and end coldplate are sealed using heat-conducting glue or epoxide resin material
Dress, to improve radiating efficiency.
Further, the stator-core lamination is tensed by bolt with coldplate and is connected, folded to reduce stator core
Thermal contact resistance between piece and between lamination and coldplate improves radiating efficiency.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, have following technology effect
Fruit：
(1) coldplate for concentratred winding motor radiating of proposition of the invention, can lead cool medium into electricity
Around machine teeth portion and winding, heat source is reduced at a distance from low-temperature receiver, increases contact area, therefore imitate with cooling well
Fruit can greatly promote the efficiency and power density of motor.
(2) the heat dissipation toothing proposed is clamped or is welded on coldplate groove top portion, can further increase dissipating for winding
The heat of stator groove center is conducted effectively to stator core and coldplate, therefore can significantly reduce the temperature of winding by hot area
Rise, solve the problems, such as concentratred winding because slot is big and in slot center temperature rise it is excessively high.
(3) it can also arrange coldplate in motor end, so that coldplate is just wrapped in coldplate teeth portion, therefore can have
Effect reduces the Wen Sheng of End winding, at the same can use the materials of the good heat conductivities such as heat-conducting glue or epoxy resin to end around
Group and end coldplate are packaged, to obtain better cooling effect.
(4) due to electric machine iron core axial thermal conductivity poor performance, heat dissipation is difficult, and axial middle part temperature rises may be excessively high.Stator core
It axially can be divided into multistage, for the long motor of motor axial length, can effectively reduce the Wen Sheng at the axial middle part of lamination.
(5) coldplate proposed axially can be connect and be consolidated by bolt with stator-core lamination and electric motor end cap
It is fixed, therefore casing can be saved, the volume and weight of motor and the loss of stator core are effectively reduced, to improve electricity
The power density of machine.
Description of the drawings
Fig. 1 is a kind of switched reluctance machines cooled down using common water jacket in the prior art；
Fig. 2 is a kind of switched reluctance machines cooled down using trough inner water pipe in the prior art；
Fig. 3 is a kind of motor cooling plate structure of cooling water (flow) direction schematic diagram of the embodiment of the present invention；
Fig. 4 is the coldplate and core-lamination stack installation diagram of a kind of motor cooling of the embodiment of the present invention；
Fig. 5 is a kind of heat dissipation toothing of motor cooling of the embodiment of the present invention；
Fig. 6 is the coldplate and radiation tooth installation diagram of a kind of motor cooling of the embodiment of the present invention；
Fig. 7 is the coldplate and core-lamination stack installation diagram of a kind of motor coldplate cooling structure of the embodiment of the present invention.
In all attached drawings, identical reference numeral is used for indicating identical element or structure, wherein：1- casings, 2- runners,
3- flow channel entry points, 4- runner exits, 5- stator cores, 6- rotor cores, 7- trough inner waters pipe, 8- coldplates, 9- coldplates teeth portion,
10- baffles, 11- bolts hole, 12- radiation tooths, 13- heat dissipation root portion, 14- radiation tooths teeth portion, 15- radiation tooths crack, 16- around
Group, 17- shafts, 18- magnet steel.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
It does not constitute a conflict with each other and can be combined with each other.
Fig. 3 is a kind of motor cooling plate structure of cooling water (flow) direction schematic diagram of the embodiment of the present invention.Such as Fig. 3 institutes
Show, one circumferentially disposed cooling medium stream road of arrangement passes through the work of baffle in coldplate teeth portion inside the coldplate
With, lead cool medium into the water channel of coldplate teeth portion, there is bolt hole in coldplate periphery, in order to core-lamination stack turn match.
Fig. 4 is the coldplate and core-lamination stack installation diagram of a kind of motor cooling of the embodiment of the present invention.Such as Fig. 4 institutes
Show, coldplate is clipped between two pieces of stator-core laminations, and coldplate teeth portion is just bonded with stator core teeth portion, and coldplate tooth
The cooling board slot formed between portion is then corresponding with stator coring groove, therefore stator-core lamination and winding and cooling medium distance are more
Closely, contact area bigger, the heat generated can directly be taken away by heat transfer by the cooling medium in coldplate.In order to subtract
Few eddy-current loss and enhancing heat dissipation effect, the coldplate use the preferably non-magnetic aluminium alloy of thermal conductivity.
In order to further increase the contact area of heat source and low-temperature receiver, the temperature of concentratred winding groove center is reduced, the present invention is same
When propose it is a kind of be inserted into stator groove center T shapes heat dissipation toothing.Fig. 5 is a kind of motor cooling of the embodiment of the present invention
Radiate toothing.As shown in figure 5, the radiation tooth is made of heat dissipation root portion and teeth portion, axially it is provided in radiation tooth teeth portion a plurality of
Crack is to reduce the eddy-current loss generated due to stray field in stator slot.Radiate root portion then with coldplate groove top portion clamping or
Welding, as shown in Figure 6.The heat that winding center generates in motor slot can reach core-lamination stack by radiation tooth teeth portion and root
And coldplate, finally taken away by the cooling medium in coldplate.
Fig. 7 is the coldplate and core-lamination stack installation diagram of a kind of motor coldplate cooling structure of the embodiment of the present invention.Such as
Shown in Fig. 7, using a kind of fractional-slot concentratred winding inorganic shell magneto of this cooling structure, which axially divides
For 4 sections, one piece of coldplate is inserted between every two sections of core-lamination stacks.In order to solve the problems, such as that the motor temperature rise of end windings and parts is excessively high, in electricity
Generator terminal portion has also been respectively arranged two pieces of coldplates, and End winding and coldplate teeth portion is made well to contact.The End winding of the motor
It can also be packaged using the good material of the thermal conductivity such as heat-conducting glue or epoxy resin with end coldplate to improve heat dissipation effect
Rate.The flow inlet and outlet of 5 pieces of coldplates can be attached by series-parallel mode.It is inserted into and radiates in stator groove center simultaneously
Tooth makes heat dissipation root portion be clamped with coldplate groove top portion.Stator-core lamination is tensed by bolt with coldplate and is connected, to reduce
Thermal contact resistance between core-lamination stack and between lamination and coldplate improves radiating efficiency.The end cap of motor can pass through the spiral shell
Bolt is assembled and is fixed, and to ensure the compactedness of entire electric machine structure, therefore entire motor can save casing, volume and again
Amount is minimized.
A kind of stator water-cooling plate cooling structure proposed by the present invention and the inorganic shell motor with the structure, including a kind of folder
Cooled plate between core-lamination stack and the radiation tooth for being inserted into groove center, this cooling structure not only can to motor stator tooth and
Winding is cooled down well, may be omitted with motor case, reduces motor volume and weight, further improves motor
Power density.The present invention solves the problems, such as concentratred winding machine winding and stator tooth cooling difficulty.
Motor water cooling plate and radiation tooth cooling structure proposed by the present invention directly with the stator teeth of the motor feels hot most serious
It is in direct contact with winding in slot, increases the contact area of heat source and low-temperature receiver, therefore can effectively reduce core tooth part and winding
Wen Sheng, the especially Wen Sheng in slot at winding center, have good heat dissipation effect.The cooled plate and electric machine iron core proposed
Fixation is bolted in lamination and electric motor end cap, and total is compact reliable, eliminates motor case, therefore reduce motor
Volume and weight, effectively increased the power density of motor.The cooled plate for the cooling of concentratred winding motor proposed
And radiation tooth cooling structure, it is excessively high to solve the problems, such as that concentratred winding motor stator teeth portion and winding center temperature rise, it will effectively
Promote this kind of motor in industrial quarters, especially to fields such as the very high electric vehicle of electric efficiency and power density requirements and aviations
Application and popularization.
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 within the spirits and principles of the present invention made by all any modification, equivalent and improvement etc., should all include
Within protection scope of the present invention.
Claims (9)
1. a kind of motor cooling, which is characterized in that the cooling structure includes：
Coldplate (8), the coldplate include the cooling that inwardly protruded teeth portion and the connection teeth portion is arranged on inner wall
Medium runner (2), the teeth portion circumferentially spaced arrangement are groove portion between adjacent fingers, baffle (10) are equipped in the teeth portion,
The both sides of the baffle and the both sides of the teeth portion are spaced apart, the cooling to form teeth portion runner and with teeth portion is connect
Medium runner is connected to so that cooling medium can be flowed along the teeth portion runner and cooling medium stream road in coldplate, realization pair
The cooling of stator；
Radiation tooth (12) comprising heat dissipation root portion (13) and radiation tooth teeth portion (14), the slot of radiate root portion and the groove portion
Top connection, radiation tooth teeth portion (14) are used to be inserted into the center of stator slot, the heat transfer for generating the machine winding to
The coldplate (8), and passed by the cooling medium, realize the cooling to the stator and winding of the motor；
The radiation tooth teeth portion is axially provided with a plurality of radiation tooth crack (15), is generated due to stray field in stator slot for reducing
Eddy-current loss.
2. a kind of motor cooling according to claim 1, which is characterized in that the teeth portion structure of the coldplate (8)
Shape is matched with the stator tooth planform of the motor so that the coldplate teeth portion is just bonded with stator teeth, and cold
But the cooling board slot formed between plate teeth portion is then corresponding with stator slot, so that the coldplate (8) is installed on the stator
Between.
3. a kind of motor cooling according to claim 1 or 2, which is characterized in that coldplate (8) periphery is equipped with
Bolt hole (11), in order to be assembled with the stator lasmination.
4. a kind of motor cooling according to claim 1 or 2, which is characterized in that the coldplate (8) uses and do not lead
Magnetic aluminium alloy or brass material.
5. a kind of motor cooling according to claim 1 or 2, which is characterized in that the heat dissipation root portion (13) with
The groove top portion of the coldplate (8) is clamped or welding.
6. a kind of fractional-slot concentratred winding inorganic shell Permanent Magnet and Electric with the cooling structure described in any one of claim 1-5
Machine comprising multiple stator-core laminations and turn being set in one heart in the annular space that the stator-core lamination is formed
Son, it is characterised in that：
The electric machine stator iron has been divided axially into four sections, and one piece of coldplate (8) is inserted between every two sections of stator-core laminations,
Each groove portion is respectively provided with the radiation tooth (12).
7. a kind of fractional-slot concentratred winding inorganic shell magneto according to claim 6, which is characterized in that in motor side
Portion is respectively disposed with a coldplate (8), and End winding and coldplate teeth portion is made well to contact.
8. a kind of fractional-slot concentratred winding inorganic shell magneto described according to claim 6 or 7, which is characterized in that the electricity
The End winding and end coldplate (8) of machine are packaged using heat-conducting glue or epoxide resin material, to improve radiating efficiency.
9. a kind of fractional-slot concentratred winding inorganic shell magneto according to claim 8, which is characterized in that the stator
Core-lamination stack and coldplate (8) are tensed by bolt and are connected, to reduce between stator-core lamination and lamination and coldplate it
Between thermal contact resistance, improve radiating efficiency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611092294.0A CN106655563B (en) | 2016-12-01 | 2016-12-01 | A kind of motor cooling and the inorganic shell motor with the structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611092294.0A CN106655563B (en) | 2016-12-01 | 2016-12-01 | A kind of motor cooling and the inorganic shell motor with the structure |
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| CN106655563A CN106655563A (en) | 2017-05-10 |
| CN106655563B true CN106655563B (en) | 2018-10-26 |
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| CN108110914B (en) * | 2018-01-25 | 2024-02-06 | 博远机电（嘉兴）有限公司 | Stator core and motor |
| CN108768011B (en) * | 2018-05-02 | 2024-04-05 | 浙江大学 | Motor stator cooling structure |
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| CN114530991A (en) * | 2018-09-29 | 2022-05-24 | 宁波诺丁汉大学 | Stator and rotor beneficial to heat dissipation |
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| CN112290701B (en) * | 2020-10-12 | 2022-07-12 | 珠海格力电器股份有限公司 | Stator winding coil heat radiation structure, stator structure and motor |
| CN113014008A (en) * | 2021-02-07 | 2021-06-22 | 珠海格力电器股份有限公司 | Rotor structure, motor, converter and have its centrifuge |
| CN113162281B (en) * | 2021-03-02 | 2023-03-10 | 华中科技大学 | External rotor electric machine with cooling structure |
| CN113141091B (en) * | 2021-04-23 | 2022-04-15 | 哈尔滨工业大学 | Cooling plate unit, preparation method and cooling plate eddy current suppression structure |
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| CN106655563A (en) | 2017-05-10 |
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