CN113364184A - Direct cooling system applied to high-speed permanent magnet motor rotor and winding - Google Patents
Direct cooling system applied to high-speed permanent magnet motor rotor and winding Download PDFInfo
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- CN113364184A CN113364184A CN202110495000.3A CN202110495000A CN113364184A CN 113364184 A CN113364184 A CN 113364184A CN 202110495000 A CN202110495000 A CN 202110495000A CN 113364184 A CN113364184 A CN 113364184A
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- 238000001816 cooling Methods 0.000 title claims abstract description 64
- 238000004804 winding Methods 0.000 title claims abstract description 38
- 239000000110 cooling liquid Substances 0.000 claims abstract description 40
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000005538 encapsulation Methods 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 9
- 238000003756 stirring Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 5
- 230000008859 change Effects 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 35
- 229910000976 Electrical steel Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating 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
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
-
- 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
- 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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- 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)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention relates to a direct cooling system applied to a high-speed permanent magnet motor rotor and a winding. The cooling liquid enters from the hollow cavity of the rotating shaft, passes through the guide hole of the rotating shaft under the rotating centrifugal action of the rotor and flows into the area formed by the end surface of the end plate and the rotor iron core; the area formed by the end face and the rotor iron core is communicated with the rotor weight-removing hole and the end plate guide hole; part of cooling liquid is thrown out from the end plate guide hole and is in contact heat exchange with the inner end face of the winding to finish the cooling of the winding; the other part of cooling liquid passes through rotor weight-removing holes communicated with each section of rotor iron core to complete axial transverse flow and complete cooling of the rotor iron core; the invention fully utilizes the structures such as the hollow shaft, the end plate, the rotor core, the permanent magnet magnetic isolation bridge and the like to arrange the cooling flow channel, thereby reducing the influence of the cooling flow channel on the electromagnetic performance; through a rotor encapsulation process, the change of a cooling runner structure is realized, and the flow demand and the temperature rise demand are balanced; the invention reduces the rotary inertia, reduces the oil stirring loss and improves the performance output of the motor and the system efficiency.
Description
Technical Field
The invention belongs to the technical field of new energy automobile power assembly cooling, and relates to a direct cooling system applied to a high-speed permanent magnet motor rotor and a winding.
Background
With the increasing of the rotating speed requirement of the permanent magnet synchronous motor, the heating value and the temperature of the rotor and the magnetic steel are increased at high speed, so that the performance of the magnetic steel is reduced, the performance output of a motor assembly is influenced, and even irreversible demagnetization is generated; influence the dynamic property, the reliability and even the safety of the pure electric vehicle. The importance of rotor cooling is prominent, and design methods and cooling effects vary.
At present, the rotor is cooled by mostly adopting an oil-cooled shaft mode, cooling oil is introduced into a hollow rotating shaft, and cooling is finished through heat transfer among cooling liquid, the shaft, an iron core and a permanent magnet, so that the mode is simplest in structure, but the iron core and the permanent magnet which have poor cooling effects cannot directly contact the cooling liquid; in addition, a special runner mode is designed for the rotor to carry out cooling heat exchange, the special runner influences a magnetic circuit of the permanent magnet at first, dynamic balance of the rotor is influenced, and a plurality of balancing factors are needed in the design process;
patent document CN111769674A discloses a rotor, a motor, a power assembly and a vehicle, wherein the rotating shaft of the rotor has a flow channel distributed along the axial direction, the cooling medium of the axial flow channel can more directly dissipate heat of the rotor winding, the heat dissipation effect of the rotor winding is effectively improved, and further the heat dissipation effect of the rotor is improved. The motor is an induction motor, and the object for cooling the rotor is a rotor winding.
Patent document CN111756141A discloses a motor rotor cooling structure, motor, car, wherein motor rotor cooling structure, including rotor core, rotor core's axial one end is equipped with first iron core clamp plate, be constructed a plurality of first rotor core cooling oil passageways on the first iron core clamp plate, iron core cooling oil passageway runs through rotor core axial both ends hole, cooling oil can via first rotor core cooling oil passageway gets into first through-flow hole is followed first through-flow hole deviates from the one end of first iron core clamp plate flows rotor core. According to the non-hollow structure of the motor rotating shaft, cooling oil does not flow into the hollow shaft, but flows into the iron core through the new rotor iron pressing plate, and the rotor is cooled; meanwhile, the cooling structure referred to in the patent does not cover the winding end cooling function.
Patent document CN110707843A discloses a motor cooling structure and a permanent magnet synchronous motor for an electric vehicle, which includes a stator cooling oil path and a rotor cooling oil path; the rotor is formed by closely superposing three types of annular silicon steel sheets with consistent radial dimensions, wherein the first type of silicon steel sheets are axially arranged at two ends of the rotor and used for sealing an oil way; the second silicon steel sheet is tightly attached to the first silicon steel sheet and is overlapped from two ends to the center along the axial direction; the third silicon steel sheet is tightly attached between the second silicon steel sheets at two ends, and a rotor cooling oil path which is respectively in butt joint communication with the oil inlet of the rotating shaft cooling oil path and the oil outlet of the cooling oil path is formed at the periphery of the third silicon steel sheet.
The rotor oil circuit inlet and outlet are all arranged in the hollow shaft, one end flows in-axial flow cooling-the other end flows out, the process is completed in the rotor assembly, and the winding end cooling is not involved; in the patent, the pressure of the cooling liquid for realizing axial flow is higher under the action of the centrifugal force of the rotation of the rotor, and the requirement of the fluid structure on the capacity of the pump is high.
The runner used by the invention is actually a rotor iron core weight removal hole, the magnetic performance of the rotor is not influenced by the cooling liquid flowing in the runner, and in addition, the runner has a symmetrical structure and has the minimum influence on the dynamic balance of the rotor; by opening the oil throwing holes on the end plates, the increase of the inertia of the rotor is reduced, and meanwhile, the cooling of the inner end surfaces of the windings can be realized;
disclosure of Invention
The invention overcomes the problems in the prior art and provides a direct cooling system applied to a rotor and a winding of a high-speed permanent magnet motor.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention provides a direct cooling system for a rotor and a winding of a permanent magnet motor; under the high-speed working condition of the permanent magnet electrode, the heat productivity of the rotor and the permanent magnet is increased, the temperature of the rotor and the magnetic steel is increased, the performance output of the motor is reduced, and the efficiency is reduced; in addition, the temperature of the winding is increased, so that the insulating layer is easy to lose efficacy, and the motor is easy to ablate and damage.
In order to solve the technical problems, the invention is realized by adopting the following technical scheme:
a direct cooling system applied to a high-speed permanent magnet motor rotor and a winding comprises a rotating shaft 1, an end plate 2 and a rotor iron core 4;
set up pivot guide hole 3 in the pivot 1, end plate 2 sets up end plate guide hole 6, rotor core 4 sets up rotor heavy-duty hole 5, the region that end plate 2 terminal surface and rotor core 4 are constituteed is led to with rotor heavy-duty hole 5 and end plate guide hole 6.
In the technical scheme, a groove 8 is formed in the surface of the inner side of an end plate 2, a groove inlet 7 is communicated with a rotating shaft guide hole 3, and the outer edge of the groove is communicated with a rotor weight-removing hole 5 to form a cooling liquid flow channel; the non-groove area on the inner side of the end plate is tightly contacted with the end surface of the rotor.
Furthermore, the depth of the groove 8 on the inner side surface of the end plate is 2-4 mm.
In the technical scheme, the grooves 8 are in circumferentially symmetrical radial structures.
In the technical scheme, the oil hole of the end plate is a cylindrical hole with the diameter of 2mm, and the normal direction of the spray hole is in an XOY plane.
In the technical scheme, the oil hole of the end plate is a cylindrical hole with the diameter of 2mm, and the included angle between the normal direction of the spray hole and an XOY surface is 20 degrees.
In the technical scheme, the rotor weight-removing holes 5 are communicated with the end plate grooves 8, and cooling liquid passes through the rotor weight-removing holes 5 of each section of the rotor iron core 4 to complete transverse flow from one end to the other end.
Preferably, eight rotor weight removing holes are formed in the end face of the rotor core 4, the rotor weight removing holes are numbered as 1 hole, 2 holes, 3 holes, 4 holes, 5 holes, 6 holes, 7 holes and 8 holes, wherein the 1 hole, 2 holes, 3 holes, 4 holes, 5 holes, 6 holes, 7 holes and 8 holes are not encapsulated, and the cooling liquid flows transversely through all the rotor weight removing holes.
Preferably, eight rotor weight removing holes are formed in the end face of the rotor core 4, the rotor weight removing holes are numbered as 1 hole, 2 holes, 3 holes, 4 holes, 5 holes, 6 holes, 7 holes and 8 holes, the 2 holes, 4 holes, 6 holes and 8 holes are encapsulated, the 1 hole, 3 holes, 5 holes and 7 holes are not encapsulated, and the cooling liquid flows transversely through the 1 hole, 3 holes, 5 holes and 7 holes.
Furthermore, 2N rotor weight removal holes are formed in the end face of the rotor core, and encapsulation sealing treatment is carried out on N or less than N flow channels.
Compared with the prior art, the invention has the beneficial effects that:
compared with the prior art, the structure of the hollow shaft, the end plate, the rotor core, the permanent magnet magnetic isolation bridge and the like is fully utilized to arrange the cooling flow channel, so that the influence of the cooling flow channel on the electromagnetic performance is reduced; meanwhile, the change of the cooling runner structure can be realized through a rotor potting process, and the flow demand and the temperature rise demand are balanced; the cooling liquid directly exchanges heat with the rotor assembly, and the heat productivity of the iron core and the permanent magnet is led out; under the action of rotation and centrifugation, cooling liquid is thrown out from the end plate spray holes, so that on one hand, direct cooling of the winding is realized; in addition, cooling liquid in the rotor assembly is discharged in time, so that the rotary inertia is reduced, the oil stirring loss is reduced, and the performance output and the system efficiency of the motor are improved.
Drawings
The invention is further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic view of a rotor of an electric machine;
FIG. 2 is a schematic coolant flow diagram;
FIG. 3a is a schematic view of the inner side of the end plate
FIG. 3b is a schematic view of the inner side surface of the end plate;
FIG. 4a is a schematic view of an end plate oil hole;
FIG. 4b is a schematic view of the space angle of the oil hole of the end plate;
FIG. 5 is a schematic view of a rotor de-weighting aperture in a rotor core;
in the figure:
1. a rotating shaft; 2. an end plate; 3. a rotating shaft guide hole; 4. a rotor core; 5. a rotor de-weighting hole; 6. end plate guide holes; 7. a groove inlet 8, a groove; 9. and (5) magnetic steel.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.
The invention is described in detail below with reference to the attached drawing figures:
the invention provides a direct cooling system for a rotor and a winding of a permanent magnet motor; cooling liquid enters from a hollow cavity of the rotating shaft 1, flows into a region formed by the end face of the end plate and the rotor iron core through the rotating shaft guide hole 3 under the rotating centrifugal action of the rotor; the area formed by the end face and the rotor iron core is communicated with the rotor weight-removing hole 5 and the end plate guide hole 6; a part of cooling liquid is thrown out from the end plate guide hole 6 and is in contact heat exchange with the inner end surface of the winding to finish the cooling of the winding; the other part of the cooling liquid passes through rotor weight-removing holes 5 communicated with each section of the rotor iron core to complete axial transverse flow and complete cooling of the rotor iron core 4; after the cooling liquid flows through the iron core, the cooling liquid flows into the region formed by the other end plate and the iron core, the region is communicated with the end plate guide hole 6, and the cooling liquid is thrown out from the end plate guide hole 6 to finish the cooling of the winding at the other end; the cooling liquid flowing area is shown in figures 1 and 2;
referring to fig. 3a and 3b, the inner side surface of the end plate is schematically shown in structure, wherein the inner side surface of the rotor end plate is provided with a circumferential radiation symmetrical groove 8, the depth of the groove 8 is 2-4mm, a groove inlet 7 is communicated with a rotating shaft guide hole 3, and the outer edge of the groove is communicated with a rotor de-weighting hole 5; the non-groove area on the inner side of the end plate is tightly contacted with the end surface of the rotor; in a closed area formed by the inner surface of the end plate and the rotor iron core, the groove 8 mainly plays a role in guiding and stabilizing flow;
referring to fig. 4a, the end plate oil hole is shown, and under the action of rotating and centrifuging, the cooling liquid in the end plate groove is thrown out from the end plate oil hole and contacts with the winding to complete heat exchange;
according to the first scheme: the end plate oil hole is a cylindrical hole with the diameter of 2mm, the space angle is shown as 4b, the normal direction of the spray hole is in an XOY plane, and different space angles have great influence on the flow rate and the flow speed of the cooling liquid outlet;
scheme II: the included angle between the normal direction of the spray hole and the XOY surface is 20 degrees, the flow speed of the spray hole is reduced, and the design can reduce the impact damage of cooling liquid jet flow to the winding insulation layer;
in the aspect of cooling effect, the scheme one is superior to the scheme two;
in fig. 5, the rotor weight-removing holes 5 on the rotor core are communicated with the end plate grooves 8 in fig. 4a, and the cooling liquid completes transverse flow from one end to the other end through the rotor weight-removing holes 5 of each section of the rotor core 4; in order to enhance the cross flow of the cooling liquid, the filling and sealing treatment can be performed on the rotor weight-removing hole 5 of the 1 st section of the rotor core part, so that a flow channel is closed, and the effective flow area is reduced; specifically, as shown in fig. 5, eight (weight-removing holes) horizontal flow channels are formed in the end face of the rotor core 4, that is, the rotor weight-removing holes are numbered as 1 to 8 holes, for example, in the first embodiment, 1 hole, 2 holes, 3 holes, 4 holes, 5 holes, 6 holes, 7 holes and 8 holes are not encapsulated, and the cooling liquid can flow horizontally through all the rotor weight-removing holes; in the second scheme, 2, 4, 6 and 8 holes are encapsulated, 1, 3, 5 and 7 holes are not encapsulated, and cooling liquid can flow transversely through 1, 3, 5 and 7 holes; from the aspect of cooling, the rotor of the first scheme has better cooling uniformity under the same flow, but has large moment of inertia and high oil stirring loss; the second flow passage has reduced volume and thus lower oil stirring loss;
in view of the purpose of reducing the oil stirring loss, the invention adopts a method of reducing the flow area inside the rotor by filling and sealing partial rotor de-weighting holes; by analogy, 2N rotor flow channels are arranged in a certain rotor, and encapsulation sealing treatment is carried out on N or less than N flow channels, so that the quality of fluid in the rotor is reduced.
The invention comprises a direct cooling system applied to a high-speed permanent magnet motor rotor and a winding; comprises a hollow rotating shaft, an end plate, a rotor core structure and a watershed structure characteristic consisting of the hollow rotating shaft, the end plate and the rotor core structure
The invention relates to a direct cooling system applied to a high-speed permanent magnet motor rotor and a winding, which comprises the following steps of:
s1: the cooling liquid flows in from the end part of the hollow shaft of the rotor;
s2: under the action of centrifugal force generated by the rotation of the rotor, cooling liquid flows into a cavity formed by the groove 8 in the end plate and the rotor core 4 from the rotating shaft guide hole 3;
s3: part of cooling liquid completes transverse flow from the cavity along the communicated rotor weight removal hole and flows to the other end of the rotor;
s4: under the action of centrifugal force, part of cooling liquid is thrown out from the communicated end plate guide holes and is in contact cooling with the winding end parts.
The end plate is provided with a groove 8 flow guide structure and an end plate guide hole; on the inner side surface of the end plate, the depth of the groove 8 is 2-4mm, and the groove is of a circumferentially symmetrical radial structure; the groove 8 is communicated with the rotor weight-removing hole to form a cooling liquid flow passage.
Each section of the rotor core is provided with a rotor weight-removing hole which is communicated with the rotor; in order to enhance the flow velocity of cooling liquid in a single hole, partial rotor weight removal holes are encapsulated, so that the effective flow area is reduced; if 2N rotor weight-removing holes are totally arranged, the number of N or less than N holes is encapsulated and sealed, so that the quality of fluid in the rotor is reduced, and the oil stirring loss is reduced.
The end plate oil hole is a cylindrical hole with the diameter of 2 mm; the normal direction of the spray hole in the first scheme is in an XOY plane, the included angle between the normal direction of the spray hole in the second scheme and the XOY plane is 20 degrees, and the outlet speed of the cooling liquid in the second scheme is low, so that the impact damage of jet flow to the winding insulating layer can be reduced; compared with the structure with different spatial included angles of the second spray hole in the similar scheme, in the first scheme, the cooling effect of the winding end part is optimal in the spray hole structure in the normal direction in the XOY plane;
the end plate groove structure is communicated with all the rotor weight-removing holes, and the rotary inertia and the oil stirring loss are low through filling and sealing partial weight-removing holes; the communication of different rotor weight-removing holes can be realized by machining different end plate groove structures, for example, the end plate groove structures are only communicated with 1 hole, 3 holes, 5 holes and 7 holes, and other parts are in close contact with the end part of the rotor;
the oil hole is arranged on the rotor end plate and is communicated with the end plate groove and the outer side of the end plate; under the action of centrifugal force, cooling liquid flows into the oil hole from the groove and is thrown out of the oil hole, so that cooling heat exchange is realized; the groove is formed in the inner side surface of the end plate in the radial direction, the rotating shaft oil guide hole is communicated with the outer side of the end plate, and the rotating shaft oil guide hole is directly thrown out of the groove structure between the end plate and the rotor, so that cooling heat exchange is realized;
the above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims. And those not described in detail in this specification are well within the skill of those in the art.
Claims (10)
1. The utility model provides a be applied to direct cooling system of high-speed permanent-magnet machine rotor and winding which characterized in that: comprises a rotating shaft (1), an end plate (2) and a rotor iron core (4);
set up pivot guide hole (3) in pivot (1), end plate (2) set up end plate guide hole (6), rotor core (4) set up rotor and go heavy hole (5), the region that end plate (2) terminal surface and rotor core (4) are constituteed goes heavy hole (5) and end plate guide hole (6) to lead to with the rotor and goes.
2. The direct cooling system applied to the rotor and the winding of the high-speed permanent magnet motor according to claim 1, is characterized in that:
a groove (8) is formed in the surface of the inner side of the end plate (2), a groove inlet (7) is communicated with the rotating shaft guide hole (3), and the outer edge of the groove is communicated with the rotor weight-removing hole (5) to form a cooling liquid flow channel; the non-groove area on the inner side of the end plate is tightly contacted with the end surface of the rotor.
3. The direct cooling system applied to the rotor and the winding of the high-speed permanent magnet motor according to claim 1, is characterized in that:
the depth of the groove (8) on the inner side surface of the end plate is 2-4 mm.
4. The direct cooling system applied to the rotor and the winding of the high-speed permanent magnet motor according to claim 3, is characterized in that:
the grooves (8) are circumferentially symmetrical radial structures.
5. The direct cooling system applied to the rotor and the winding of the high-speed permanent magnet motor according to claim 1, is characterized in that:
the oil hole of the end plate is a cylindrical hole with the diameter of 2mm, and the normal direction of the spray hole is in the XOY plane.
6. The direct cooling system applied to the rotor and the winding of the high-speed permanent magnet motor according to claim 1, is characterized in that:
the oil hole of the end plate is a 2 mm-diameter cylindrical hole, and the included angle between the normal direction of the spray hole and the XOY plane is 20 degrees.
7. The direct cooling system applied to the rotor and the winding of the high-speed permanent magnet motor according to claim 1, is characterized in that:
the rotor weight-removing holes (5) are communicated with the end plate grooves (8), and cooling liquid passes through the rotor weight-removing holes (5) of each section of the rotor iron core (4) to complete transverse flow from one end to the other end.
8. The direct cooling system applied to the rotor and the winding of the high-speed permanent magnet motor according to claim 7, is characterized in that:
eight rotor weight removing holes are formed in the end face of the rotor core (4), the rotor weight removing holes are numbered as 1 hole, 2 holes, 3 holes, 4 holes, 5 holes, 6 holes, 7 holes and 8 holes, wherein the 1 hole, the 2 holes, the 3 holes, the 4 holes, the 5 holes, the 6 holes, 7 holes and 8 holes are not encapsulated, and cooling liquid flows transversely through all the rotor weight removing holes.
9. The direct cooling system applied to the rotor and the winding of the high-speed permanent magnet motor according to claim 7, is characterized in that:
eight rotor weight removing holes are formed in the end face of the rotor core (4), the rotor weight removing holes are numbered as 1 hole, 2 holes, 3 holes, 4 holes, 5 holes, 6 holes, 7 holes and 8 holes, the 2 holes, 4 holes, 6 holes and 8 holes are encapsulated, the 1 hole, 3 holes, 5 holes and 7 holes are not encapsulated, and cooling liquid flows transversely through the 1 hole, 3 holes, 5 holes and 7 holes.
10. The direct cooling system applied to the rotor and the winding of the high-speed permanent magnet motor according to claim 7, is characterized in that:
and 2N rotor weight removal holes are formed in the end face of the rotor core, and the N or lower flow channels are subjected to encapsulation sealing treatment.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110495000.3A CN113364184A (en) | 2021-05-07 | 2021-05-07 | Direct cooling system applied to high-speed permanent magnet motor rotor and winding |
| PCT/CN2021/125206 WO2022233114A1 (en) | 2021-05-07 | 2021-10-21 | Direct cooling system applied to rotor and winding of high-speed permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110495000.3A CN113364184A (en) | 2021-05-07 | 2021-05-07 | Direct cooling system applied to high-speed permanent magnet motor rotor and winding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113364184A true CN113364184A (en) | 2021-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110495000.3A Pending CN113364184A (en) | 2021-05-07 | 2021-05-07 | Direct cooling system applied to high-speed permanent magnet motor rotor and winding |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113364184A (en) |
| WO (1) | WO2022233114A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114243997A (en) * | 2021-12-20 | 2022-03-25 | 盐城工学院 | Forced cooperative heat dissipation cooling device |
| CN115001215A (en) * | 2022-07-22 | 2022-09-02 | 南京理工大学 | Axial permanent magnet synchronous motor rotor oil throwing cooling system and cooling method thereof |
| WO2022233114A1 (en) * | 2021-05-07 | 2022-11-10 | 中国第一汽车股份有限公司 | Direct cooling system applied to rotor and winding of high-speed permanent magnet motor |
| DE102021126074A1 (en) | 2021-10-07 | 2023-04-13 | Audi Aktiengesellschaft | Electrical machine with rotor cooling |
| CN116760215A (en) * | 2023-07-21 | 2023-09-15 | 东风电驱动系统有限公司 | Rotor cooling mechanism and oil cooling motor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022233114A1 (en) * | 2021-05-07 | 2022-11-10 | 中国第一汽车股份有限公司 | Direct cooling system applied to rotor and winding of high-speed permanent magnet motor |
| DE102021126074A1 (en) | 2021-10-07 | 2023-04-13 | Audi Aktiengesellschaft | Electrical machine with rotor cooling |
| CN114243997A (en) * | 2021-12-20 | 2022-03-25 | 盐城工学院 | Forced cooperative heat dissipation cooling device |
| CN115001215A (en) * | 2022-07-22 | 2022-09-02 | 南京理工大学 | Axial permanent magnet synchronous motor rotor oil throwing cooling system and cooling method thereof |
| CN115001215B (en) * | 2022-07-22 | 2023-05-02 | 南京理工大学 | Oil throwing cooling system and method for axial permanent magnet synchronous motor rotor |
| CN116760215A (en) * | 2023-07-21 | 2023-09-15 | 东风电驱动系统有限公司 | Rotor cooling mechanism and oil cooling motor |
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| Publication number | Publication date |
|---|---|
| WO2022233114A1 (en) | 2022-11-10 |
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Application publication date: 20210907 |