CN115694005A - Stator structure of oil-cooled motor - Google Patents
Stator structure of oil-cooled motor Download PDFInfo
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- CN115694005A CN115694005A CN202211122956.XA CN202211122956A CN115694005A CN 115694005 A CN115694005 A CN 115694005A CN 202211122956 A CN202211122956 A CN 202211122956A CN 115694005 A CN115694005 A CN 115694005A
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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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Abstract
The invention provides a stator structure of an oil-cooled motor, which comprises a shell, a stator core, a plurality of slot insulators and a stator winding, wherein the stator core, the slot insulators and the stator winding are arranged in the shell: the stator core is assembled on the inner circular surface of the shell; a plurality of oil through holes are formed in a stator yoke part of the stator core, and a plurality of slots are distributed in stator slots of the stator core in an insulating manner; the stator winding comprises a plurality of in-slot windings, a first end winding and a second end winding, and the plurality of in-slot windings in the slot insulation are arranged at intervals to form a plurality of in-slot oil passages; the outer sides of two ends of the stator core are respectively provided with a first end stator oil cavity and a second end stator oil cavity; a main oil inlet is formed in the shell and is communicated with the first end stator oil cavity; when the cooling device works, cooling oil enters the first end stator oil cavity from the main oil inlet, and the first end winding is cooled; cooling the stator core through the oil through hole, and cooling the in-slot winding through the in-slot oil through channel; and finally, the second end winding is cooled in a second end stator oil cavity.
Description
Technical Field
The invention relates to the technical field of oil-cooled motors, in particular to a stator structure of an oil-cooled motor.
Background
The motor is used as a device for mutual conversion between mechanical energy and electric energy by taking an electromagnetic field as a medium, and is mainly applied to the electric driving system of a new energy automobile and other industrial fields. The motor includes parts such as shell, end cover, stator and rotor, and wherein, the stator includes stator core, winding and slot insulation: the stator core is formed by laminating stator punching sheets and forms a plurality of stator core slots; the stator core slots are used for placing and supporting windings and slot insulation; the windings include an in-slot winding and an end winding.
Electric machines generally use air and water cooling: air, as a medium with better dielectric capacity, can be cooled by directly contacting with a heating component inside the motor, but has relatively low density, specific heat capacity and thermal conductivity, so that the heat dissipation capacity is very limited. Although water has a relatively high density, specific heat capacity, and thermal conductivity, it has a relatively low dielectric capacity and cannot be cooled by direct contact with a heat generating component (particularly, an end winding) inside the motor.
Along with the integration degree of a new energy automobile electric drive system is higher and higher, the requirement for improving the power density of the motor is more and more strict, and the motor and the gear box can share an oil way, so that an oil cooling mode becomes a new choice. Oil is a fluid medium with relatively good dielectric capacity, has high density, specific heat capacity and thermal conductivity, and can be cooled by directly contacting with heat generating components (such as end windings and stator cores) in the motor. Fig. 1 shows the heat transfer path of the stator of the oil-cooled motor in the conventional form, and it can be seen that the oil-injected cooling effectively solves the problem of poor cooling effect of the end winding. The advantages of physical properties such as viscosity, heat conductivity coefficient and specific heat capacity of oil in the aspect of convection heat dissipation are lower than those of water, so that the cooling effect of the oil-cooled motor in the form on windings in the slots needs to be improved; there may also be uneven spraying of the end windings which may result in local areas of the end windings being too hot as they are not sprayed.
Disclosure of Invention
In order to solve the above problems, the present invention provides a stator structure of an oil-cooled motor, which includes a housing, and a stator core, a plurality of slot insulators, and a stator winding disposed in the housing:
the stator core is assembled on the inner circular surface of the shell; the stator core comprises a stator yoke part and a plurality of stator tooth parts, a plurality of oil through holes are formed in the stator yoke part at intervals around the center of the stator core, and the oil through holes penetrate through two ends of the stator yoke part; a plurality of stator teeth are distributed on the inner circumference of the stator yoke part at intervals, and a stator slot is formed between every two adjacent stator teeth;
the plurality of slots are distributed in the plurality of stator slots in an insulating way;
the stator winding comprises a plurality of in-slot windings, a first end winding and a second end winding, and the in-slot windings in the slot insulation are arranged at intervals to form a plurality of in-slot oil passages;
the first end winding and the second end winding are arranged at two ends of the stator core respectively;
the outer sides of two ends of the stator core are respectively provided with a first end stator oil cavity and a second end stator oil cavity, the first end winding is positioned in the first end stator oil cavity, and an oil inlet of the oil through hole and an oil inlet of the in-groove oil through passage are communicated with the first end stator oil cavity; the second end winding is positioned in the second end stator oil cavity, and an oil outlet of the oil through hole and an oil outlet of the in-groove oil through passage are communicated with the second end stator oil cavity;
a main oil inlet is formed in the shell and is communicated with the first end stator oil cavity; when the cooling device works, cooling oil enters the first end stator oil cavity from the main oil inlet, and the first end winding is cooled firstly; cooling the stator core through the oil through hole, and cooling the in-slot winding through the in-slot oil through passage; and finally entering the second end stator oil cavity to cool the second end winding.
Preferably, the slot insulator comprises a slot insulator body and a slot opening filling part which are integrally arranged, the slot insulator body is arranged in the stator slot, a plurality of in-slot winding placing slots are arranged in the slot insulator body at intervals along the radial direction of the stator core, the in-slot winding placing slots penetrate through two ends of the slot insulator body along the axial direction of the stator core, and the in-slot winding is arranged in the in-slot winding placing slots; the two adjacent in-slot winding placing slots are communicated through the in-slot oil passage;
the notch filling portion is located outside the winding placing portion, and the notch filling portion fills the notches of the stator slots.
Preferably, two end faces of the notch filling part are aligned with two end faces of the stator core, respectively, and two ends of the slot insulator are longer than two ends of the stator core, respectively.
Preferably, the outer surface of the winding in the slot is coated with an insulating paint film.
Preferably, the stator slot is a necking slot, the stator slot comprises a stator slot body and a slot opening which are communicated, and the width of the slot opening is smaller than that of the stator slot body;
the width of the notch filling part is smaller than that of the slot insulation body, the slot insulation body is located in the stator slot body, and the notch filling part is located in the notch.
Preferably, the in-slot oil passage is arranged along the axial direction of the stator core.
Preferably, both ends of the housing are longer than both ends of the stator core, an oil slinger is arranged outside one end of the stator core, and the inner wall of the oil slinger, the inner circumference of the housing at the end, the end face of the stator core and the slot insulation end face form the first end stator oil cavity.
Preferably, the slinger comprises an integrally-arranged slinger body and an annular part, and the outer peripheral surface of the slinger body is hermetically arranged with the inner peripheral surface of the shell; the oil deflector ring body extends towards the stator core and is provided with the annular part, the end face of the annular part is sealed with the end face of the notch filling part and the end face of the stator tooth part, and the oil deflector ring forms a first end stator oil cavity with the inner circumference of the shell, the end face of the stator core and the groove insulation end part.
Preferably, the plurality of in-slot oil passages in the slot insulation face the plurality of layers of coils of the second end winding respectively.
Preferably, an outer circumferential surface of the stator yoke is interference-fitted with an inner circumferential surface of the housing.
Preferably, the oil through holes are arranged along an axial direction of the stator core and are perpendicular to two end faces of the stator core respectively.
Compared with the prior art, the invention has the following technical effects:
1. in the prior art, oil holes for cooling the stator core are arranged on the outer peripheral surface of the stator yoke part, so the stator core cannot be in contact fit with the shell due to the positions of the oil holes, and the mechanical strength of the stator core is poor. The oil through hole is formed in the stator yoke, so that the stator core can be directly contacted and matched with the shell, and the strength of the stator core is enhanced.
2. The invention solves the problem that the conventional oil-cooled motor has poor cooling effect on the windings in the slots by arranging the oil passage in the stator slots for directly cooling the windings in the slots in a contact manner.
3. A first end stator oil cavity and a second end stator oil cavity are respectively arranged on the outer sides of two ends of a stator core, a first end winding is positioned in the first end stator oil cavity, and an oil inlet of an oil through hole and an oil inlet of an in-groove oil through channel are communicated with the first end stator oil cavity; the second end winding is positioned in the second end stator oil cavity, and an oil outlet of the oil through hole and an oil outlet of the in-groove oil through passage are communicated with the second end stator oil cavity; a main oil inlet is formed in the shell and is communicated with the first end stator oil cavity; when the cooling device works, cooling oil enters the first end stator oil cavity from the main oil inlet, and the first end winding is cooled; cooling the stator core through the oil through hole, and cooling the in-slot winding through the in-slot oil through channel; and finally, the second end winding is cooled in the second end stator oil cavity, so that the problem of uneven spraying of the end winding is effectively solved.
4. The invention is provided with an oil deflector ring at the outer side of one end of the stator core, the inner wall of the oil deflector ring, the inner circumference of the shell at the end, the end surface of the stator core and the groove insulation end surface form a first end stator oil cavity, and aims to fill the first end stator oil cavity with cooling oil and effectively solve the problem of uneven cooling of a first end winding.
5. In the invention, because the in-groove oil passages are arranged in each layer of the in-groove windings, the oil outlet of each in-groove oil passage faces to a layer of corresponding coil of the second end winding, namely a plurality of layers of in-groove oil passages respectively face to a plurality of layers of coils of the second end winding, and the problem of uneven spraying on the second end winding is effectively solved.
Of course, it is not necessary for any product to practice the invention to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a heat transfer path of a stator of an oil-cooled electric machine of conventional form;
fig. 2 is a schematic structural diagram of a stator structure of an oil-cooled motor according to an embodiment of the present invention;
fig. 3 is a first cross-sectional view of a stator structure according to an embodiment of the present invention;
fig. 4 is a second cross-sectional view of a stator structure according to an embodiment of the present invention;
fig. 5 is a perspective view of a stator core according to an embodiment of the present invention;
fig. 6 is a sectional view of a stator core according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a trench isolation structure according to an embodiment of the present invention;
FIG. 8 is an end perspective view of a slot insulator according to one embodiment of the present invention;
fig. 9 is a plan view of an end of a slot insulator according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Referring to fig. 2 to 9, a stator structure of an oil-cooled motor includes a housing 1, and a stator core 2, a plurality of slot insulators 3, and a stator winding disposed in the housing 1:
the stator core 2 is assembled on the inner circular surface of the housing 1, the stator core 2 includes a stator yoke 21 and a plurality of stator teeth 22, the stator yoke 21 is annular, the plurality of stator teeth 22 are uniformly fixed on the inner circular surface of the stator yoke 21 around the axis of the stator yoke 21 at intervals, the stator yoke 21 is coaxial with the housing 1, the stator teeth 22 are arranged along the axial direction of the stator yoke 21, and two end surfaces of the stator teeth 22 are respectively flush with two end surfaces of the stator yoke 21 (in this embodiment, the end surfaces are the surfaces perpendicular to the stator axis). Be equipped with a plurality of centers on in stator yoke portion 21 the oil through hole 211 that 2 center intervals of stator core set up, oil through hole 211 runs through along 2 axial of stator core the both ends of stator yoke portion 21, and respectively with the both ends face of stator core 2 is perpendicular. In the prior art, the oil through hole is arranged on the outer peripheral surface of the stator yoke part, so that the stator core cannot be in contact fit with the shell due to the position of the oil through hole, and the mechanical strength of the stator core is poor. The oil hole 211 is located in the stator yoke 21, so that the stator core 2 can be directly contacted and matched with the shell 1, and the strength of the stator core 2 is enhanced. In the present embodiment, the outer peripheral surface of the stator yoke 21 is fixedly fitted to the inner peripheral surface of the housing 1 by interference fit or other means.
Since a plurality of the stator teeth 22 are distributed at intervals on the inner circumference of the stator yoke 21, a stator slot 23 is formed between two adjacent stator teeth 22, and the stator slot 23 is arranged along the axial direction of the stator core 2; a number of said slot insulations 3 are distributed in a number of said stator slots 23.
The stator winding comprises a plurality of in-slot windings 4, a first end winding 5 and a second end winding 6 which are integrally arranged, and the slot insulation 3 is used for accommodating the in-slot windings 4. In this embodiment, a plurality of in-slot windings 4 may be accommodated in one slot insulator 3, a plurality of in-slot windings 4 in the slot insulator 3 are arranged at intervals to form a plurality of in-slot oil passages 312, and the in-slot oil passages 312 penetrate through two end faces of the stator core 2. The first end winding 5 and the second end winding 6 are respectively arranged at two ends of the stator core 2.
In the present embodiment, the slot insulator 3 includes a slot insulator body 31 and a slot opening filling portion 32, which are integrally provided, the slot insulator body 31 is disposed in the stator slot 23, a plurality of slot inner winding 4 placement slots are disposed in the slot insulator body 31 at intervals along the radial direction of the stator core 2, the slot inner winding 4 placement slots penetrate through both end faces of the slot insulator body 31 along the axial direction of the stator core 2, and the slot inner winding 4 is disposed in the slot inner winding 4 placement slot; the two adjacent in-slot winding 4 placing slots are communicated through the in-slot oil passage 312, and the in-slot oil passage 312 is arranged along the axial direction of the stator core 2 and penetrates through two end faces of the slot insulation body 31. The in-slot winding 4 placing groove is used for placing the in-slot winding 4, a plurality of in-slot windings 4 can be placed in one groove insulation body 31, the plurality of in-slot windings 4 are layered in the same groove insulation body 31, and two adjacent in-slot windings 4 in the same groove insulation body 31 are separated through an in-slot oil passage 312. In order to ensure the insulation performance between the windings 4 in each layer of the slots, the windings are made of high-performance insulation paint films, namely, the outer surfaces of the windings 4 in the slots are coated with the insulation paint films. When the cooling oil fills the in-slot oil passage 312, a certain insulation effect is also exerted between the two adjacent layers of in-slot windings 4. The invention adopts the mode that the windings 4 in the slots are directly contacted with the cooling oil, thereby enhancing the cooling effect of the windings 4 in the slots.
The stator winding of the invention comprises an in-slot winding 4 arranged in a stator slot 23 and end windings arranged at two ends of a stator core 2, namely the stator winding is a distributed winding and is generally used for a motor with a long axial direction of the stator core 2, and the number of teeth (or the number of slots of the stator core 2) of the stator core 2 of the motor is more, and is generally 48, 72 and the like. In the prior art, the stator winding wound on the stator tooth 22 is a concentrated winding, and is generally used for a flat motor with a short axial stator core 2, and the number of teeth of the stator core 2 (or the number of slots of the stator core 2) of the flat motor is small, and is generally 9, 12, 15, 18, and the like. The stator structure described by the invention is particularly suitable for a flat wire winding motor structure widely adopted by an electric drive system of a new energy automobile.
The slot filling part 32 is located outside the winding placement part, and the slot filling part 32 fills the slot of the stator slot 23. Both end faces of the notch filling part 32 are aligned with both end faces of the stator core 2, respectively. In order to ensure the creepage distance between the first end winding 5 and the second end winding 6 and the stator core 2, the two ends of the slot insulator 31 are respectively longer than the two ends of the stator core 2, and the two ends of the slot insulator 31 are respectively longer than the two ends of the slot filling part 32.
In this embodiment, the stator slot 23 is a closed slot, the stator slot 23 includes a stator slot body and a slot opening that are communicated with each other, the width of the slot opening is smaller than that of the stator slot body, and the width of the slot opening filling portion 32 is smaller than that of the slot insulation body 31. The slot insulator body 31 is located within the stator slot body and the slot filling portion 32 is located at the slot.
In this embodiment, two ends of the housing 1 are longer than two ends of the stator core 2, a first end stator oil chamber 7 and a second end stator oil chamber 8 are respectively formed outside two ends of the stator core 2, the first end winding 5 is located in the first end stator oil chamber 7, and an oil inlet of the oil through hole 211 and an oil inlet of the in-groove oil through passage 312 are both communicated with the first end stator oil chamber 7; the second end winding 6 is located in the second end stator oil chamber 8, and an oil outlet of the oil through hole 211 and an oil outlet of the in-groove oil through passage 312 are both communicated with the second end stator oil chamber 8.
A main oil inlet 11 is formed in the shell 1, and the main oil inlet 11 is communicated with the first end stator oil cavity 7; during operation, cooling oil enters the first end stator oil cavity 7 from the main oil inlet 11, cools the first end winding 5, and then is divided into two paths: the first path is that the oil enters the oil through hole 211 through an oil inlet of the oil through hole 211, the stator core 2 is cooled, and then the oil enters the second end stator oil cavity 8 through an oil outlet of the oil through hole 211; the second path enters the in-slot oil passage 312 through an oil inlet of the in-slot oil passage 312 to cool the in-slot winding 4, and then enters the second-end stator oil cavity 8 through an oil outlet of the in-slot oil passage 312 to cool the second-end winding 6. In the present embodiment, the cooling oil passes through the oil outlet of the oil passage 211 and the oil outlet of the in-tank oil passage 312 and is ejected to the surface of the second end winding 6 by utilizing the fluidity and surface tension characteristics of the oil, to be applied to the second end winding 6.
In order to fill the first end stator oil cavity 7 with cooling oil and effectively solve the problem of uneven cooling of the first end winding 5, an oil slinger 9 is arranged outside one end of the stator core 2, and the inner wall of the oil slinger 9, the inner circumference of the shell 1 of the end, the end surface of the stator core 2 and the end surface of the slot insulation 3 form the first end stator oil cavity 7.
Further, the slinger 9 comprises an integrally provided slinger body 91 and an annular part 92, and the outer peripheral surface of the slinger body 91 is hermetically provided with the inner peripheral surface of the housing 1; the slinger body 91 extends towards the stator core 2 to form the annular part 92, the end face of the annular part 92 is sealed with the end face of the notch filling part 32 and the end face of the stator tooth part 22, and the slinger 9 forms the first end stator oil chamber 7 with the inner circumference of the housing 1, the end face of the stator core 2 and the end part of the slot insulator 3.
In the present embodiment, each of the first end winding 5 and the second end winding 6 includes a multilayer coil having inner and outer layers in a radial direction thereof. Because the in-slot oil passages 312 are all arranged in each layer of the in-slot windings 4, this means that the oil outlet of each in-slot oil passage 312 faces a corresponding layer of coils of the second end winding 6, that is, the in-slot oil passages 312 of a plurality of layers face a plurality of layers of coils of the second end winding 6, and the problem of uneven spraying on the second end winding 6 is effectively solved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (11)
1. The utility model provides a stator structure of oil-cooled motor which characterized in that, is in including the casing and setting stator core, a plurality of groove insulation and stator winding in the casing:
the stator core is assembled on the inner circular surface of the shell; the stator core comprises a stator yoke part and a plurality of stator tooth parts, a plurality of oil through holes are formed in the stator yoke part at intervals around the center of the stator core, and the oil through holes penetrate through two ends of the stator yoke part; a plurality of stator teeth are distributed on the inner circumference of the stator yoke part at intervals, and a stator slot is formed between every two adjacent stator teeth;
the plurality of slots are distributed in the plurality of stator slots in an insulating way;
the stator winding comprises a plurality of in-slot windings, a first end winding and a second end winding, and the in-slot windings in the slot insulation are arranged at intervals to form a plurality of in-slot oil passages;
the first end winding and the second end winding are arranged at two ends of the stator core respectively;
a first end stator oil cavity and a second end stator oil cavity are respectively formed in the outer sides of the two ends of the stator core, the first end winding is located in the first end stator oil cavity, and an oil inlet of the oil through hole and an oil inlet of the in-groove oil through channel are communicated with the first end stator oil cavity; the second end winding is positioned in the second end stator oil cavity, and an oil outlet of the oil through hole and an oil outlet of the in-groove oil through passage are communicated with the second end stator oil cavity;
a main oil inlet is formed in the shell and is communicated with the first end stator oil cavity; when the cooling device works, cooling oil enters the first end stator oil cavity from the main oil inlet, and the first end winding is cooled; cooling the stator core through the oil through hole, and cooling the in-slot winding through the in-slot oil through passage; and finally entering the second end stator oil cavity to cool the second end winding.
2. The stator structure of an oil-cooled motor according to claim 1, wherein the slot insulator includes a slot insulator body and a slot opening filling portion that are integrally provided, the slot insulator body is provided in the stator slot, a plurality of in-slot winding placement slots are provided in the slot insulator body at intervals in a radial direction of the stator core, the in-slot winding placement slots penetrate through both ends of the slot insulator body in an axial direction of the stator core, and the in-slot windings are provided in the in-slot winding placement slots; the two adjacent in-slot winding placing slots are communicated through the in-slot oil passage;
the notch filling portion is located outside the winding placing portion, and the notch filling portion fills the notches of the stator slots.
3. The stator structure of an oil-cooled motor according to claim 2, wherein both end surfaces of the slot filling portion are aligned with both end surfaces of the stator core, respectively, and both ends of the slot insulator are longer than both ends of the stator core, respectively.
4. The stator structure of an oil-cooled motor according to claim 2, wherein an outer surface of the in-slot winding is coated with an insulating paint film.
5. The stator structure of an oil-cooled motor according to claim 2, wherein the stator slots are closed slots, the stator slots include stator slot bodies and slot openings which are communicated with each other, and the width of the slot openings is smaller than that of the stator slot bodies;
the width of the notch filling part is smaller than that of the slot insulation body, the slot insulation body is located in the stator slot body, and the notch filling part is located in the notch.
6. The stator structure of an oil-cooled motor according to claim 1, wherein the in-slot oil passage is provided along an axial direction of the stator core.
7. The stator structure of an oil-cooled motor as claimed in claim 1, wherein both ends of the housing are longer than both ends of the stator core, and an oil slinger is provided outside one end of the stator core, and an inner wall of the oil slinger forms the first-end stator oil chamber with an inner circumference of the housing, the stator core end surface, and the slot insulation end surface of the one end.
8. The stator structure of an oil-cooled motor according to claim 7, wherein the slinger includes an integrally provided slinger body and an annular portion, an outer peripheral surface of the slinger body being sealingly provided with an inner peripheral surface of the housing; the oil slinger body extends towards the stator core and is provided with the annular part, the end face of the annular part is sealed with the end face of the notch filling part and the end face of the stator tooth part, and the oil slinger forms the first end stator oil cavity with the inner circumference of the shell, the end face of the stator core and the groove insulation end part.
9. The stator structure of the oil-cooled motor according to claim 1, wherein the plurality of in-slot oil passages in the slot insulation respectively face the plurality of layers of coils of the second end winding.
10. The stator structure of an oil-cooled motor according to claim 1, wherein an outer circumferential surface of the stator yoke is interference-fitted with an inner circumferential surface of the housing.
11. The stator structure of an oil-cooled motor according to claim 1, wherein the oil through holes are formed along an axial direction of the stator core and are perpendicular to both end surfaces of the stator core, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211122956.XA CN115694005A (en) | 2022-09-15 | 2022-09-15 | Stator structure of oil-cooled motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211122956.XA CN115694005A (en) | 2022-09-15 | 2022-09-15 | Stator structure of oil-cooled motor |
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| Publication Number | Publication Date |
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| CN115694005A true CN115694005A (en) | 2023-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211122956.XA Pending CN115694005A (en) | 2022-09-15 | 2022-09-15 | Stator structure of oil-cooled motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116388420A (en) * | 2023-02-27 | 2023-07-04 | 丽水方德智驱应用技术研究院有限公司 | High-efficiency oil-cooled motor |
| CN118611302A (en) * | 2024-08-08 | 2024-09-06 | 京马电机有限公司 | A stator winding insulation structure of concentrated winding |
-
2022
- 2022-09-15 CN CN202211122956.XA patent/CN115694005A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116388420A (en) * | 2023-02-27 | 2023-07-04 | 丽水方德智驱应用技术研究院有限公司 | High-efficiency oil-cooled motor |
| CN118611302A (en) * | 2024-08-08 | 2024-09-06 | 京马电机有限公司 | A stator winding insulation structure of concentrated winding |
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