In-groove cooling flat wire motor
By setting oil passage holes in the stator core yoke to form an oil passage, the cooling oil can directly contact the flat wire windings in the stator slots, solving the problem of poor cooling effect of the windings in the stator slots in the prior art, and achieving better heat dissipation and improved motor performance.
Patent Information
- Application Number
- CN202520395339.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2026-03-20
- Estimated Expiration
- 2035-03-07
AI Technical Summary
Existing oil cooling methods are insufficient for effectively cooling the stator slot windings of flat wire motors, resulting in poor heat dissipation.
An oil passage is formed by setting an oil passage hole in the yoke of the stator core, so that the cooling oil can directly enter the stator slot and contact the flat wire winding to achieve in-slot cooling.
It improves the heat dissipation of flat wire motors, prevents overheating, ensures uniform temperature distribution, reduces energy consumption, extends motor life, and improves efficiency.
Smart Images
Figure CN224021508U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of electric machines, in particular to a slot-cooled flat wire motor. BACKGROUND
[0002] A large amount of heat is generated when a flat wire motor is running. In order to cool the flat wire motor, air cooling, water cooling and oil cooling technologies have been developed.
[0003] The rapid development of the oil cooling scheme makes the internal cooling of the flat wire motor more efficient. However, the existing oil cooling method is to use an oil guide ring to guide the cooling oil to cool the winding and the stator core. This method can only directly cool the stator core, and the cooling effect on the winding in the stator slot is weak. Therefore, a new oil cooling method is needed to cool the flat wire motor. CONTENT OF THE INVENTION
[0004] The embodiment of the present application provides a slot-cooled flat wire motor. The structure of the flat wire motor can better cool the stator winding, and the cooling effect is good.
[0005] The embodiment of the present application provides a slot-cooled flat wire motor, which comprises a stator support and a stator installed on the stator support, wherein an oil inlet hole is arranged on the stator support.
[0006] The stator comprises a stator core and a flat wire winding arranged in a stator slot of the stator core.
[0007] The stator core comprises a stator core yoke and a stator core tooth portion, the stator core tooth portion is composed of a plurality of stator teeth inserted into the stator core yoke, and a stator slot is formed between every two adjacent stator teeth.
[0008] The stator core yoke is formed by rotating and laminating a plurality of stator yokes, and an oil passage is formed by a plurality of oil passage holes arranged on the plurality of stator yokes. The oil passage hole is in communication with the oil inlet hole, and the oil outlet hole is in communication with the stator slot.
[0009] In the slot-cooled flat wire motor, the shape of each oil passage hole is the same.
[0010] In the slot-cooled flat wire motor, the shape of the oil passage hole is rectangular.
[0011] In the slot-cooled flat wire motor, the size of each oil passage hole is the same.
[0012] In the slot-cooled flat wire motor, the size of each oil passage hole is different.
[0013] In the slot-cooled flat wire motor provided by the embodiment of the present application, the sizes of the plurality of oil passing holes can be partially the same and partially different.
[0014] In the slot-cooled flat wire motor provided by the embodiment of the present application, the shapes of the plurality of oil passing holes can be partially the same and partially different.
[0015] In the slot-cooled flat wire motor provided by the embodiment of the present application, the shapes of the plurality of oil passing holes can be partially the same and partially different.
[0016] In the slot-cooled flat wire motor provided by the embodiment of the present application, each of the stator yokes is formed by stacking a plurality of stator yoke punching pieces, and each of the stator teeth is formed by stacking a plurality of stator tooth punching pieces.
[0017] In the slot-cooled flat wire motor provided by the embodiment of the present application, the heights of the plurality of stator yokes are the same.
[0018] The slot-cooled flat wire motor provided by the embodiment of the present application, the stator core yoke part is formed by rotating and stacking a plurality of stator yokes, an oil passing hole is arranged on each of the stator yokes, then a plurality of oil passing holes on the plurality of stator yokes form an oil passage, then an oil inlet of the oil passage is communicated with an oil conveying hole arranged on a stator support, and an oil outlet of the oil passage is communicated with a stator slot, so that the cooling oil can enter the stator slot and directly contact with the flat wire winding arranged in the stator slot to cool the flat wire winding, and the heat dissipation effect is greatly improved. BRIEF DESCRIPTION OF DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0020] Figure 1 The structural schematic diagram of the slot-cooled flat wire motor provided by the embodiment of the present application.
[0021] Figure 2 The three-dimensional structural schematic diagram of the stator core yoke part provided by the embodiment of the present application.
[0022] Figure 3 The sectional view of the internal oil passage of the stator core provided by the embodiment of the present application.
[0023] Explanation of reference numerals:
[0024] 10-stator 20-stator tooth 30-stator yoke
[0025] 40-oil inlet 50-oil outlet 101-stator core
[0026] 102 - flat wire winding DETAILED DESCRIPTION
[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.
[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.
[0029] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0030] In the present application, unless specifically defined and limited otherwise, a first feature "on" or "under" a second feature can include that the first and second features are directly in contact, or that the first and second features are not directly in contact but are in contact through another feature between them. Moreover, the first feature "over", "above" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the first feature is lower in horizontal height than the second feature.
[0031] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplification of the present application, the components and arrangements of the specific examples are described in the following. Of course, they are only examples and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to the reference numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can realize the application of other processes and / or the use of other materials.
[0032] The embodiment of the present application provides a slot cooling flat wire motor. Referring to Figure 1 , the slot cooling flat wire motor comprises a stator support and a stator 10 mounted on the stator support, wherein the stator support is provided with an oil inlet hole.
[0033] The stator 10 comprises a stator core 101 and a flat wire winding 102 arranged in the stator slot of the stator core 101.
[0034] The inner diameter of the stator core 101 is connected with the outer diameter of the stator support.
[0035] The stator core 101 comprises a stator core yoke and a stator core tooth part, and the stator core tooth part is composed of a plurality of stator teeth 20 inserted into the stator core yoke, and a stator slot is formed between every two adjacent stator teeth 20.
[0036] The stator core yoke is formed by rotating and laminating a plurality of stator yokes 30, and each stator yoke 30 is provided with an oil passage hole. The plurality of oil passage holes on the plurality of stator yokes form an oil passage channel, the oil inlet 40 of the oil passage channel is communicated with the oil inlet hole, and the oil outlet 50 of the oil passage channel is communicated with the stator slot.
[0037] In the embodiment of the present application, the stator core adopts a structure form of separation of the stator yoke and the stator tooth, which is an outer rotor structure. It should be noted that the stator core can also adopt a conventional core, and when the conventional core is adopted, the oil inlet hole is arranged on the machine shell.
[0038] In the embodiment of the present application, the slot cooling method is used to cool the flat wire winding 102. The slot cooling method requires that the cooling oil (the gearbox oil in the embodiment of the present application) directly contacts the flat wire winding 102 in the stator slot, that is, the cooling oil is required to be introduced into the stator slot. As shown in FIG. 2, the cooling oil is introduced through the oil inlet hole in the stator support, flows into the cooling oil from the yoke of the stator core, that is, flows into the cooling oil from the oil inlet 40 of the oil passage, then flows through the plurality of oil passing holes in the stator yoke 30, flows out from the oil outlet 50 of the oil passage, and then enters the stator slot, thereby directly contacting the flat wire winding 102 in the stator slot to cool the flat wire winding. After the winding and the stator core are cooled, the cooling oil carries the heat out, is cooled by the heat exchanger, and then is circulated. The path of the oil passage is shown in FIG. 3. Figure 2 Figure 3
[0039] In the embodiment of the present application, first, since the cooling oil directly contacts the heat source, the cooling oil can quickly absorb and carry away the heat, reduce the temperature of the motor, and prevent the motor from being damaged due to overheating. Second, the cooling oil flows in the flat wire winding, reduces the problem of local overheating, and ensures uniform temperature distribution. Third, the cooling oil can cool the stator core of the motor, and reduces the problem of slow heat conduction of the stator core. Finally, compared with the traditional oil-cooled motor, the slot cooling method has low energy consumption, reduces the temperature, reduces the thermal stress, prolongs the service life of the motor, and improves the efficiency of the motor.
[0040] In some embodiments, the shape of each oil passing hole is the same.
[0041] In some embodiments, the shape of each oil passing hole is the same.
[0042] In some embodiments, the shape of each oil passing hole is the same.
[0043] In some embodiments, the shape of each oil passing hole is the same.
[0044] In some embodiments, the shape of each oil passing hole is the same.
[0045] In some embodiments, the shape of each oil passing hole is the same.
[0046] In some embodiments, the shape of each oil passing hole is the same.
[0047] In some embodiments, the shape of each oil passing hole is the same.
[0048] In some embodiments, the sizes of the plurality of oil passing holes are partially the same and partially different.
[0049] Specifically, the skilled in the art can determine which oil passing holes have the same size and which oil passing holes have the different size according to the actual situation, which is not specifically limited herein.
[0050] In some embodiments, the shapes of the plurality of oil passing holes are partially the same and partially different.
[0051] Specifically, the skilled in the art can determine which oil passing holes have the same shape and which oil passing holes have the different shape according to the actual situation, which is not specifically limited herein.
[0052] In some embodiments, the shapes of the plurality of oil passing holes are partially the same and partially different.
[0053] Specifically, the skilled in the art can determine which oil passing holes have the same shape and which oil passing holes have the different shape according to the actual situation, which is not specifically limited herein.
[0054] In some embodiments, each stator yoke 30 is formed by stacking a plurality of stator yoke punching pieces, and each stator tooth 20 is formed by stacking a plurality of stator tooth punching pieces.
[0055] Specifically, the stator yoke 30 is first stacked by the stator yoke punching pieces to form each stator yoke, and then all the obtained stator yokes are stacked by rotation to form the stator core 101. After the stator tooth 20 is stacked by the stator tooth punching pieces, it is pressed into the stator yoke 30 by a press until the end faces of the two are flush.
[0056] In some embodiments, the heights of each stator yoke 30 are the same.
[0057] Specifically, the stator yoke is divided into N segments (all formed by stacking stator yoke punching pieces), and the height of each segment is determined according to the total stack height of the stator core 101, i.e. stack height / N=height of each segment.
[0058] In summary, the slot-cooled flat wire motor provided by the present application has the following advantages: ① The cooling oil directly contacts the heat source, can quickly absorb and carry away heat, reduces the temperature of the motor, and can also prevent the motor from being damaged due to overheating; ② The cooling oil flows inside the flat wire winding, reducing the problem of local overheating and ensuring uniform temperature distribution; ③ The cooling oil can cool inside the stator core of the motor, reducing the problem of slow heat conduction of the stator core; ④ Compared with traditional oil-cooled motors, slot-cooling has low energy consumption, reduces temperature and thus reduces thermal stress, prolongs the service life of the motor, and also improves the efficiency of the motor.
[0059] In summary, the slot-cooled flat wire motor provided by the embodiments of the present application has the following advantages: the stator core yoke is formed by rotating and laminating multiple stator yokes 30, oil holes are arranged on each stator yoke 30, multiple oil holes on the multiple stator yokes 30 form an oil passage, an oil inlet 40 of the oil passage is communicated with an oil delivery hole arranged on the stator support, and an oil outlet 50 of the oil passage is communicated with a stator slot, so that the cooling oil can enter the stator slot and directly contact the flat wire winding 102 arranged in the stator slot to cool the flat wire winding 102, and the heat dissipation effect is greatly improved.
[0060] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.
[0061] The slot-cooled flat wire motor provided by the embodiments of the present application has been described in detail, and the principles and implementation manners of the present application are described by applying specific examples; the above description of the embodiments is only used to help understand the technical solutions of the present application and the core ideas thereof; those skilled in the art should understand that the technical solutions recorded in the above embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A slot-cooled flat wire motor, characterized in that, It includes a stator support and a stator mounted on the stator support, wherein the stator support is provided with an oil supply hole; The stator includes a stator core and flat wire windings disposed in stator slots of the stator core; The stator core includes a stator core yoke and a stator core tooth. The stator core tooth consists of a plurality of stator teeth inserted into the stator core yoke, and a stator slot is formed between every two adjacent stator teeth. The stator core yoke is formed by rotating and stacking multiple stator yoke segments. Each stator yoke segment is provided with an oil passage hole. The multiple oil passage holes on the multiple stator yoke segments form an oil passage channel. The oil inlet of the oil passage channel is connected to the oil outlet hole, and the oil outlet of the oil passage channel is connected to the stator slot.
2. The in-slot cooled flat wire motor as described in claim 1, characterized in that, Each of the described oil passages has the same shape.
3. The in-slot cooled flat wire motor as described in claim 2, characterized in that, The oil passage is rectangular in shape.
4. The in-slot cooled flat wire motor as described in claim 2, characterized in that, The dimensions of each of the described oil passage holes are the same.
5. The in-slot cooled flat wire motor as described in claim 2, characterized in that, The dimensions of each of the described oil passage holes are different.
6. The in-slot cooled flat wire motor as described in claim 2, characterized in that, The dimensions of the multiple oil passages may be partially the same or partially different.
7. The in-slot cooled flat wire motor as described in claim 1, characterized in that, The shape of each of the described oil passages is different.
8. The in-slot cooled flat wire motor as described in claim 1, characterized in that, The shapes of the multiple oil passages may be partially the same or partially different.
9. The in-slot cooled flat wire motor as described in claim 1, characterized in that, Each stator yoke segment is formed by stacking multiple stator yoke laminations, and each stator tooth is formed by stacking multiple stator tooth laminations.
10. The in-slot cooled flat wire motor as described in claim 1, characterized in that, The height of the stator yoke is the same for each segment.