CN116667574A - Air deflector for restraining temperature rise of stator winding for axial forced air cooling motor and optimization method thereof - Google Patents
Air deflector for restraining temperature rise of stator winding for axial forced air cooling motor and optimization method thereof Download PDFInfo
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- CN116667574A CN116667574A CN202310743734.8A CN202310743734A CN116667574A CN 116667574 A CN116667574 A CN 116667574A CN 202310743734 A CN202310743734 A CN 202310743734A CN 116667574 A CN116667574 A CN 116667574A
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- 238000004804 winding Methods 0.000 title claims abstract description 90
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000001816 cooling Methods 0.000 title claims abstract description 31
- 238000005457 optimization Methods 0.000 title claims abstract description 11
- 230000000452 restraining effect Effects 0.000 title claims description 6
- 238000012360 testing method Methods 0.000 claims abstract description 23
- 230000004044 response Effects 0.000 claims abstract description 10
- 238000012546 transfer Methods 0.000 claims abstract description 10
- 238000004458 analytical method Methods 0.000 claims abstract description 9
- 230000002401 inhibitory effect Effects 0.000 claims abstract description 4
- 238000010998 test method Methods 0.000 claims description 4
- 239000004020 conductor Substances 0.000 description 6
- 238000009423 ventilation Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000004382 potting Methods 0.000 description 4
- 239000002826 coolant Substances 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
-
- 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
-
- 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
- H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
-
- 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
-
- 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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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses an air deflector for inhibiting temperature rise of a stator winding for an axial forced air cooling motor and an optimization method thereof, and relates to the technical field of motor cooling. The air deflector is arranged on the inner wall of the shell at the air outlet side, is in a plate-shaped structure, a containing cavity is arranged in the middle of the air deflector, and the outer edge of the air deflector is vertically arranged on the inner wall of the shell; determining position parameters and size parameters of the air deflector according to the reference parameters, establishing a plurality of test schemes based on the position parameters, the size parameters and the plate body parameters, and obtaining temperature rise characteristics of motor stator windings under each test scheme through a motor universe conjugate heat transfer analysis model under each test scheme; and constructing a functional relation between the dimensional parameter and the position parameter of the air guide plate and the temperature rise characteristic of the motor stator winding by using a response surface method, further obtaining the optimal dimensional parameter and the optimal position parameter of the air guide plate, and combining the optimal dimensional parameter and the optimal position parameter with the plate body parameter to obtain the optimized air guide plate. The invention effectively inhibits the temperature rise of the stator winding and ensures the safe and stable operation of the motor.
Description
Technical Field
The invention relates to the technical field of motor cooling, in particular to an air deflector for inhibiting temperature rise of a stator winding for an axial forced air cooling motor and an optimization method thereof.
Background
As the performance requirements of various application scenes on the motor are continuously improved, the motor is often designed with higher and higher electromagnetic load to realize high power density or high torque density, but the loss generated in the motor is also increased, so that the temperature rise of each structure, especially the stator winding, is improved, and the difficulty of heat dissipation of the motor is definitely greatly increased. The high temperature can accelerate the aging of the insulating material of the stator winding, shorten the service life of the motor, and the high temperature can also cause the stator core and the inner conductor of the winding of the motor to be heated and expanded, squeeze the insulating material, cause the insulating material to be broken, and the like, so that the motor is in fault. Therefore, in the design of motors, especially industrial high-power density motors, an effective stator winding cooling method is a guarantee of continuous safe and stable operation of the motor.
Currently, stator windings are typically cooled by direct cooling and end potting. Direct cooling of the stator windings greatly shortens the heat transfer path between the fluid cooling medium and the stator windings by introducing cooling pipes or radiators into the stator slots, so that losses generated by the stator windings are directly taken away by the cooling medium, but a large amount of equipment such as pumps, cooling medium circulation loops, external radiators and the like are required for realizing direct cooling of the windings, the complexity and cost of the motor are increased, and due to the change of the structures in the slots, the motor electromagnetic scheme is required to be redesigned, and cannot be directly applied to the existing motor or the completed electromagnetic scheme. The end part of the motor is filled with the potting material, so that the thermal resistance between the end part of the stator winding and the machine shell is reduced, but the price of the potting material is relatively high, and the heat conductivity of the potting material is not more than 5W/(m.K) at the highest, so that the cooling effect of the method is limited.
Disclosure of Invention
In view of the above-mentioned defects of the prior art, the invention provides an air deflector for restraining the temperature rise of a stator winding for an axial forced air cooling motor and an optimization method thereof, which adopts conjugate heat transfer analysis to solve the temperature rise characteristic of the stator winding of the motor, utilizes a response surface method to construct a functional relation between the position parameter and the size parameter of the air deflector and the temperature rise characteristic of the stator winding, designs the air deflector for making the temperature rise of the stator winding reach the minimum value, and can effectively restrain the temperature rise of the stator winding by adopting the air deflector for the axial forced air cooling motor, prevent the motor from failure and ensure the safe and stable operation of the motor.
The invention provides an air deflector for inhibiting temperature rise of a stator winding for an axial forced air cooling motor, which comprises a machine shell, wherein the machine shell comprises an air outlet side, the inner wall of the machine shell on the air outlet side is provided with the air deflector, the air deflector is in a plate-shaped structure, the middle part of the air deflector is provided with a containing cavity, the outer edge of the air deflector is fixed on the inner wall of the machine shell, and the plate surface of the air deflector is perpendicular to the inner surface of the machine shell.
Further, the inner edge of the air deflector is round, oval or comprises a plurality of arc-shaped inner edges.
The invention provides an air deflector optimization method for restraining temperature rise of a stator winding for an axial forced air cooling motor, which comprises the following steps:
s1, determining the shape of the inner edge of an air deflector, and determining the reference parameters and the plate body parameters of the air deflector;
s2, determining position parameters and size parameters of the air deflector according to the reference parameters, establishing a plurality of test schemes based on the position parameters, the size parameters and the plate body parameters, and obtaining temperature rise characteristics of motor stator windings under each test scheme through a motor universe conjugate heat transfer analysis model under each test scheme;
s3, constructing a functional relation between the dimensional parameter and the position parameter of the air guide plate and the temperature rise characteristic of the motor stator winding by using a response surface method, obtaining the optimal dimensional parameter and the optimal position parameter of the air guide plate by solving the functional relation, and obtaining the optimized air guide plate by combining the optimal dimensional parameter and the optimal position parameter with the plate body parameter.
Further, the reference parameters comprise a distance D between the radially highest position of the stator winding end part on the motor air outlet side and the end face on the air outlet side of the stator core, and a distance H between the surface of the stator winding end part on the motor air outlet side and the inner surface of the shell.
Further, the position parameter is a dimensionless position parameter D * The method comprises the following steps:
D * ＝d/D；
d is the distance between the air deflector and the end face of the stator core at the air outlet side of the motor;
the dimension parameter is dimensionless dimension parameter H * The method comprises the following steps:
H * ＝h/H；
wherein h is the length of the air deflector along the radial direction.
Further, the temperature rise characteristic of the stator winding is the maximum temperature rise reduction amplitude delta T of the stator winding max Or the average temperature rise of the stator winding is reduced by delta T ave The method comprises the following steps of:
wherein Δ represents the difference; t is the temperature rise of the stator winding; superscript max represents the maximum value; superscript ave represents the average value; subscript 0 indicates that the motor is not equipped with an air deflector.
Further, the functional relationship between the size parameter and the position parameter and the temperature rise characteristic of the motor stator winding is as follows:
wherein y is a response variable; x is x i Is an input variable; n is the number of input variables; lambda (lambda) 0 、λ i 、λ ii 、λ ij 、λ ji Are all undetermined coefficients.
Further, the test scheme is established by a full factor test method, and the number m of the test schemes is as follows:
m＝a b ；
wherein a is the number of levels of the influencing factors; b is the number of influencing factors.
Compared with the prior art, the invention has the following technical effects:
1. according to the invention, the air deflector is arranged in the space at the end part of the air outlet side of the motor, so that the flowing direction of air flowing out from the axial ventilating duct between the stator core and the machine shell is changed, the cooling air is guided to blow the end part of the stator winding, the temperature rise of the stator winding is effectively restrained, the problem of overhigh temperature rise of the stator winding is relieved, the heat dissipation capacity of the motor is improved, and the service life of the motor is prolonged.
2. The air deflector is arranged on the inner wall of the shell at the air outlet side of the motor, has no direct contact with the main structure of the motor, does not influence the electromagnetic performance of the motor, is easy to apply to the motor with the same type of ventilation mode, and has strong applicability.
3. The air deflector adopts an annular structure formed by casting, so that the problem of cost rise of the air deflector is avoided, the air deflector is simple in processing technology, convenient to manufacture and high in realizability.
4. The method combines the conjugate heat transfer analysis method and the response surface method, utilizes the response surface method to construct a functional relation between the position parameter and the size parameter of the air deflector and the temperature rise characteristic of the stator winding, obtains the position parameter and the size parameter when the temperature rise of the stator winding reaches the minimum value, realizes the optimal design of the two core parameters of the position parameter and the size parameter of the air deflector, improves the design efficiency compared with the traditional optimal design method, and can effectively inhibit the temperature rise of the stator winding, prevent the motor from failure and ensure the safe and stable operation of the motor when the axial forced air cooling motor adopts the optimized air deflector.
The conception, specific structure, and technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.
Drawings
FIG. 1 is a schematic cross-sectional view of an axial forced air-cooled motor according to an embodiment of the present invention;
FIG. 2 is a schematic axial cross-sectional view of an axial forced air-cooled motor according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1A;
FIG. 4 is a schematic view of an annular deflector according to an embodiment of the present invention;
FIG. 5 is the magnitude of the highest temperature rise drop of the stator windings for each test protocol;
reference numerals illustrate: 1. a blower; 2. a housing; 3. a stator core; 4. a stator winding; 5. a rotor core; 6. a rotor conductor; 7. an end ring; 8. a rotating shaft; 9. an air deflector; 10. an air inlet; 11. an axial ventilation channel is arranged between the stator core and the shell; 12. a rotor axial vent; 13. an air outlet; 14. a stator groove; 15. a rotor groove.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the illustrations, not according to the number, shape and size of the components in actual implementation, and the form, number and proportion of each component in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.
Some exemplary embodiments of the invention have been described for illustrative purposes, it being understood that the invention may be practiced otherwise than as specifically shown in the accompanying drawings.
The utility model provides an air deflector for restraining stator winding temperature rise for axial forced air cooling motor, is applied to axial forced air cooling motor, axial forced air cooling motor includes the motor body, the motor body includes casing 2, stator core 3, stator winding 4, rotor core 5, rotor conductor 6, end ring 7, pivot 8 passes through the bearing fixedly connected with front and back end cover, the front and back end cover passes through the bolt fastening on casing 2, pivot 8 runs through the rear end central point of casing 2, pivot 8 passes through the keyway fixedly connected with rotor core 5, rotor core yoke has seted up rotor axial ventilation hole 12, be provided with rotor slot 15 on rotor core 5, rotor conductor 6 sets up in rotor slot 15 of rotor core 5, end ring 7 passes through welding process fixedly connected with rotor conductor 6, be provided with stator slot 14 on stator core 3, stator winding 4 sets up in stator slot 14 of stator core 3, stator core 3 outside is provided with the core draw-in groove along the circumferencial direction, casing 2 is provided with the casing draw-in groove along the circumferencial direction, stator core 3 passes through the draw-in groove fixedly connected with casing 2, there is axial ventilation gap 11 between stator core 3 and the casing 2. An air inlet 10 is formed in the top plane of the front end of the shell 2, and an air outlet 1 is formed in the end face of the rear end of the shell 2;
the fan 1 is a centrifugal fan, the fan 1 is fixed on the top plane of the shell 2 through bolts, an air outlet of the fan 1 corresponds to the motor air inlet 10, the fan 1 blows external cold air into each structure in the motor for cooling the inside of the motor, and the air deflector is arranged on the inner wall of the shell at the air outlet side; as shown in fig. 1, the air deflector has a plate-shaped structure, and a containing cavity is arranged in the middle of the air deflector and is used for containing the internal structure of the motor, so that the air deflector 9 is in non-contact with the stator core 3, the stator winding 4, the rotor core 5 and the rotor conductor 6 of the motor; the outer fringe of aviation baffle is fixed on the casing inner wall to the face of aviation baffle is welded perpendicularly on the circumference inner wall of casing 2, the inner edge of aviation baffle is circular, oval or includes a plurality of arc inner edges, and the concrete shape of aviation baffle is set for according to motor inner structure. In this embodiment, the air deflector adopts a circular ring structure as shown in fig. 3. The air deflector guides the cooling air flowing out from the axial ventilating duct 11 between the stator core and the casing to flow to the end part of the stator winding 4, so that the cooling air flow path in the motor is changed, the surface convection heat exchange rate of the end part of the stator winding is improved, and the heat transferred to the outside by the stator winding is further improved.
As shown in fig. 2, the yoke portion of the rotor core 5 is provided with 16 rotor axial ventilation holes 12, the rotor axial ventilation holes 12 are distributed in a double layer at the yoke portion of the rotor core 5, 8 of each layer are uniformly distributed along the circumferential direction.
Based on the air deflector structure of the above embodiment, in a specific embodiment, an air deflector optimization method for suppressing temperature rise of a stator winding for an axial forced air cooling motor is provided, which includes the following steps:
s1, determining the shape of the inner edge of the air deflector, and determining the reference parameters and the plate body parameters of the air deflector according to the air deflector structure of the annular structure in the embodiment.
The reference parameters comprise the distance D between the radially highest position of the stator winding end part on the motor air outlet side and the end surface on the stator core air outlet side, and the distance H between the surface of the stator winding end part on the motor air outlet side and the inner surface of the shell. In this embodiment, a distance d=113.4 mm between the radially highest position of the end portion of the stator winding on the air outlet side of the motor and the end face on the air outlet side of the stator core, the end portion winding of the motor is bent toward the inner surface of the casing, and a distance H between the end portion surface of the stator winding on the air outlet side of the motor and the inner surface of the casing changes with the position, which is denoted as h=f (D).
The plate parameters comprise the thickness of the air deflector and the material of the air deflector, and in the embodiment, the thickness of the air deflector is 3mm; the air deflector is made of cast iron.
S2, determining position parameters and size parameters of the air deflector according to the reference parameters, establishing a plurality of test schemes based on the position parameters, the size parameters and the plate parameters, and obtaining temperature rise characteristics of motor stator windings under each test scheme through a motor universe conjugate heat transfer analysis model under each test scheme, wherein the method specifically comprises the following steps:
s21, determining a dimensionless position parameter D according to the distance D between the radial highest position of the stator winding end part at the air outlet side of the motor and the end surface at the air outlet side of the stator core * The method comprises the following steps:
D * ＝d/D；
d is the distance between the air deflector and the end face of the stator core at the air outlet side of the motor;
determining dimensionless dimension parameter H according to distance H between end surface of stator winding at air outlet side of motor and inner surface of machine shell * The method comprises the following steps:
H * ＝h/H；
wherein H is the length of the air deflector along the radial direction, H * The value range of (2) is 0<H * ＜1。
S22, under the condition that the plate body parameters set in the step S1 are unchanged, according to the dimensionless position parameters D * And dimensionless dimensional parameter H * Establishing an influence factor set X= { D * ，H * Establishing m test schemes corresponding to different position parameters and size parameters by using a full factor test method, and further establishing a motor universe three-dimensional physical model when m different air deflector position parameters and size parameter combination schemes;
the calculation formula of the test scheme number m of the full factor test method is as follows:
m＝a b ；
wherein a is the number of the levels of the influencing factors, and in the embodiment, the value of a is 8; b is the number of influencing factors, and in this embodiment, the value of b is 2. Calculated m=64. The m test protocols of this example are shown in table 1:
table 1 full factor test protocol detailed
S23, establishing a motor three-dimensional physical model, carrying out grid division on the motor three-dimensional physical model, establishing a motor universe conjugate heat transfer analysis model under a corresponding m air deflector position parameter and size parameter combination scheme, applying boundary conditions and regional attributes to the conjugate heat transfer analysis model, and carrying out numerical solution on the motor conjugate heat transfer analysis model on the basis of the boundary conditions and regional attributes to obtain motor stator winding temperature rise characteristics under the m air deflector position parameter and size parameter combination scheme;
the mesh subdivision adopts a polyhedral mesh for subdivision, and mesh encryption is carried out on a fluid calculation domain near the motor air gap and the stator winding end part.
The boundary condition setting adopted in the present embodiment includes: setting an air inlet of a motor shell as a mass flow inlet boundary, wherein the flow rate of the mass flow inlet boundary condition of the air inlet of the motor in the embodiment is 2.2458kg/s, and the temperature is 308.15K;
setting a motor air outlet as a pressure outlet boundary, wherein the pressure of the motor air outlet is set to be standard atmospheric pressure;
the outer surface of the casing is set as a constant temperature wall boundary, and the temperature of the constant temperature wall boundary condition in the embodiment is 308.15K.
And setting the internal wall surface of the model as a coupling wall surface boundary condition.
The temperature rise characteristic of the stator winding is the maximum temperature rise reduction amplitude delta T of the stator winding max Or the average temperature rise of the stator winding is reduced by delta T ave The following formulas are respectively shown:
wherein Δ represents the difference; t is the temperature rise of the stator winding; superscript max represents the maximum value; superscript ave represents the average value; subscripts x and y respectively represent position parameters D of air deflectors arranged on the motor * =x and size parameter H * =y; subscript 0 indicates that the motor is not equipped with an air deflector. The highest temperature rise and drop amplitude of the stator winding of each test scheme is shown in fig. 5.
S3, constructing a functional relation between the dimensional parameter and the position parameter of the air guide plate and the temperature rise characteristic of the motor stator winding by using a response surface method, obtaining the optimal dimensional parameter and the optimal position parameter of the air guide plate by solving the functional relation, and obtaining the optimized air guide plate by combining the optimal dimensional parameter and the optimal position parameter with the plate body parameter.
The functional relationship is as follows:
y k the k response variable is respectively the maximum temperature rise and drop amplitude delta T of the stator winding max And the average temperature rise of the stator winding is reduced by an amplitude delta T ave ；x i For the ith input variable, respectively the position parameter D * And a dimension parameter H * The method comprises the steps of carrying out a first treatment on the surface of the The number of input variables is 2; lambda (lambda) 0 、λ i 、λ ii 、λ ij 、λ ji All are undetermined coefficients, and the specific value of each undetermined coefficient can be determined by using a least square method in the embodiment.
In this embodiment, the functional relation between the highest temperature rise of the stator winding and the position parameter and the size parameter of the air deflector is:
solving the functional relation between the temperature rise characteristic of the motor stator winding and the position parameter and the size parameter of the air deflector, and obtaining the position parameter D * And dimension parameter H * In the range of the value of (a), the position parameter D is when the temperature rise characteristic of the stator winding reaches the minimum value * And dimension parameter H * The value of (a) is the optimized position parameter D * And dimension parameter H * . In the present embodiment, at D * And H is * The minimum value which can be reached by the highest temperature rise of the stator winding in the value range is-9.26K, corresponding to D * ＝0.126，H * The actual position parameter and the actual size parameter of the air deflector are d=14.29 mm and h=24.26 mm when the temperature rise characteristic of the stator winding reaches the minimum value according to the obtained formula.
Through a comparison test, after the air deflector designed in the embodiment is installed, the highest temperature rise of the motor stator winding is reduced by 9.26K, which indicates that the air deflector optimized by adopting the embodiment can improve the operation reliability of the motor.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (8)
1. The utility model provides an axial forced air cooling motor is with aviation baffle that restraines stator winding temperature rise, the motor includes the casing, and the casing includes the air-out side, installs the aviation baffle on the casing inner wall of air-out side, its characterized in that, the aviation baffle is platelike structure, and the aviation baffle middle part is equipped with holds the chamber, and the aviation baffle outer fringe is fixed on the casing inner wall, the face and the casing internal surface of aviation baffle are perpendicular.
2. An air deflector for an axial forced air cooled machine to inhibit temperature rise of stator windings as set forth in claim 1, wherein the inner edge of the air deflector is circular, oval or comprises a plurality of arcuate inner edges.
3. The optimization method of the air deflector for inhibiting the temperature rise of the stator winding for the axial forced air cooling motor is characterized by comprising the following steps of:
s1, determining the shape of the inner edge of an air deflector, and determining the reference parameters and the plate body parameters of the air deflector;
s2, determining position parameters and size parameters of the air deflector according to the reference parameters, establishing a plurality of test schemes based on the position parameters, the size parameters and the plate body parameters, and obtaining temperature rise characteristics of motor stator windings under each test scheme through a motor universe conjugate heat transfer analysis model under each test scheme;
s3, constructing a functional relation between the dimensional parameter and the position parameter of the air guide plate and the temperature rise characteristic of the motor stator winding by using a response surface method, obtaining the optimal dimensional parameter and the optimal position parameter of the air guide plate by solving the functional relation, and obtaining the optimized air guide plate by combining the optimal dimensional parameter and the optimal position parameter with the plate body parameter.
4. A method of optimizing an air deflector for suppressing a temperature rise of a stator winding for an axial forced air-cooled motor according to claim 3, wherein the reference parameter includes a distance D between a radially uppermost position of an end portion of the stator winding on the air-out side of the motor and an end face of the stator core on the air-out side, and a distance H between a surface of the end portion of the stator winding on the air-out side of the motor and an inner surface of the housing.
5. The method for optimizing air deflector for suppressing temperature rise of stator winding for axial forced air cooling motor as recited in claim 4, wherein said position parameter is dimensionless position parameter D * The method comprises the following steps:
D * ＝d/D；
d is the distance between the air deflector and the end face of the stator core at the air outlet side of the motor;
the dimension parameter is dimensionless dimension parameter H * The method comprises the following steps:
H * ＝h/H；
wherein h is the length of the air deflector along the radial direction.
6. The optimization method of an air deflector for suppressing temperature rise of stator windings for an axial forced air cooling motor according to claim 5, wherein the temperature rise characteristic of the stator windings is the maximum temperature rise drop amplitude deltat of the stator windings max Or the average temperature rise of the stator winding is reduced by delta T ave The method comprises the following steps of:
wherein Δ represents the difference; t is the temperature rise of the stator winding; superscript max represents the maximum value; superscript ave represents the average value; subscript 0 indicates that the motor is not equipped with an air deflector.
7. The optimization method of an air deflector for suppressing temperature rise of stator windings for an axial forced air cooling motor according to claim 5, wherein the functional relationship between the dimensional parameter and the positional parameter and the temperature rise characteristic of the stator windings of the motor is:
wherein y is a response variable; x is x i Is an input variable; n is the number of input variables; lambda (lambda) 0 、λ i 、λ ii 、λ ij 、λ ji Are all undetermined coefficients.
8. The optimization method of an air deflector for restraining temperature rise of a stator winding for an axial forced air cooling motor according to claim 3, wherein the test scheme is established by a full factor test method, and the number m of the test schemes is as follows:
m＝a b ；
wherein a is the number of levels of the influencing factors; b is the number of influencing factors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310743734.8A CN116667574A (en) | 2023-06-23 | 2023-06-23 | Air deflector for restraining temperature rise of stator winding for axial forced air cooling motor and optimization method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310743734.8A CN116667574A (en) | 2023-06-23 | 2023-06-23 | Air deflector for restraining temperature rise of stator winding for axial forced air cooling motor and optimization method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN116667574A true CN116667574A (en) | 2023-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310743734.8A Pending CN116667574A (en) | 2023-06-23 | 2023-06-23 | Air deflector for restraining temperature rise of stator winding for axial forced air cooling motor and optimization method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116667574A (en) |
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2023
- 2023-06-23 CN CN202310743734.8A patent/CN116667574A/en active Pending
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