CN216872950U - Mixed parallel winding type flat wire stator winding, stator assembly and flat wire motor - Google Patents
Mixed parallel winding type flat wire stator winding, stator assembly and flat wire motor Download PDFInfo
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- CN216872950U CN216872950U CN202220229197.6U CN202220229197U CN216872950U CN 216872950 U CN216872950 U CN 216872950U CN 202220229197 U CN202220229197 U CN 202220229197U CN 216872950 U CN216872950 U CN 216872950U
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Abstract
The utility model relates to a hybrid parallel winding type flat wire stator winding, a stator assembly and a flat wire motor; the winding comprises a single-layer flat wire formed by mutually winding a plurality of modular flat wires with different sectional areas, the single-layer flat wires are positioned in the same stator slot, and the single-layer flat wires closer to the rotor contain the more modular flat wires. According to the utility model, modular flat wire systems with various sizes are established, and grooves with different sizes are processed by different combinations in parallel, so that the expansion of a platform is facilitated; according to the alternating current loss principle of the flat wire motor, the flat wires close to the air gap are formed by parallel winding of more and smaller modularized flat wires, and the flat wires far away from the air gap are formed by parallel winding of less and larger modularized flat wires, so that the alternating current loss is reduced, and the motor efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of permanent magnet synchronous driving motors for new energy automobiles, and particularly relates to a hybrid parallel winding type flat wire stator winding, a stator assembly and a flat wire motor.
Background
The new energy automobile has extremely high requirements on the power density (torque density) of the automobile driving motor due to the requirements on the whole automobile quality and space; on the other hand, the driving motor is forced to continuously improve the efficiency of the new energy passenger vehicle due to the requirement of the new energy passenger vehicle on the endurance mileage. Compared with a traditional round wire motor, the flat wire motor has the advantages that the slot fullness rate is greatly improved by adopting the flat wire in the stator slot, the wire resistance is reduced, the power and the torque are improved, and the motor has better heat dissipation capacity, so that the application of the flat wire motor to a high-performance driving motor for a new energy automobile is inevitable.
The vehicle driving motor has high requirement on the rotating speed of the motor, and the highest rotating speed can reach ten thousand revolutions per minute. When the motor runs at a high rotating speed, the harmonic magnetic field of the stator armature and the harmonic magnetic field of the rotor magnetic steel both generate the skin effect and the proximity effect on the winding, so that the alternating current resistance of the armature is generated, and the copper consumption of the winding is increased. The alternating current loss is related to the strength of the magnetic field, and the more obvious the skin effect of the wire is at the position closer to the air gap, the larger the alternating current loss is, thereby causing the uneven heat dissipation of the winding.
For a traditional round wire motor, a common method for reducing armature alternating current loss is to twist a whole round wire by a plurality of thin round wires, so that a transmission path of eddy current is blocked, the resistance of the transmission path of the eddy current is increased, and the aim of reducing the alternating current loss is finally achieved; for a flat wire motor, because a plurality of flat wires cannot be wound with each other like round wires, the current measures for reducing the alternating current loss are mainly based on the optimization of the magnetic field of a stator and a rotor, but the reduction degree is limited.
At present, a flat wire motor winding is divided into 4 layers, 6 layers and 8 layers, each layer is a conductor, and for motors with different sizes, the conductors are different in size and need to be customized again by an enterprise, so that the platform expansion of the enterprise is seriously influenced. In addition, the size of a single conductor is large, the mechanical strength is high, the bending difficulty is high when the end part is connected, and therefore the processing difficulty is increased.
In addition, the connection of the end part of the flat wire motor involves multi-step processes such as bending, welding, painting and the like, but because the length of the end winding needs to be ensured as short as possible, the arrangement of the wires is compact, and the operation space is small. Increasing the difficulty of end welding. On the other hand, oil spray cooling is more and more used for the flat wire motor because its direct refrigerated characteristics, but because the flat wire motor end winding arranges too closely, the cooling oil often can only with the flat wire periphery contact, and then leads to the uneven problem of cooling.
In view of the above, how to overcome the above problems of the flat wire motor has become an urgent problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problems, a first object of the present invention is to provide a hybrid parallel winding type flat wire stator winding that is easy to expand a platform, a second object of the present invention is to provide a stator assembly that can effectively reduce ac loss of the flat wire winding, improve platformization capability of the flat wire, and reduce process difficulty, and a third object of the present invention is to provide a flat wire motor.
In order to achieve the above object of the first utility model, the present invention adopts the following technical solutions:
a mixed parallel-wound flat wire stator winding comprises a single-layer flat wire formed by mutually parallel-winding a plurality of modular flat wires with different sectional areas, the single-layer flat wires are positioned in the same stator slot, and the single-layer flat wires closer to a rotor contain the larger number of the modular flat wires.
As a preferable scheme: the modularized flat wire is of various types, including a modularized flat wire A, a modularized flat wire B, a modularized flat wire C and a modularized flat wire D, wherein the length of the modularized flat wire is L, and the widths of the modularized flat wire A, the modularized flat wire B, the modularized flat wire C and the modularized flat wire D are L, L/2, L/4 and L/8 respectively; the length of the modularized flat wire E is 3/4L, and the widths of the modularized flat wire E, the modularized flat wire F, the modularized flat wire G and the modularized flat wire H are 3/4L, L/2, L/4 and L/8 respectively; the length of the modularized flat wire I is L/2, and the widths of the modularized flat wire I, the modularized flat wire J and the modularized flat wire K are L/2, L/4 and L/8 respectively; the length of the modularized flat wire L is L/4, and the width of the modularized flat wire M is L/8; and the length and the width of the modularized flat wire N are both L/8, and the single-layer flat wire is formed by winding any one or more modularized flat wires.
As a preferable scheme: the end outgoing lines of the single-layer flat wires are formed by extending part of the modularized flat wires, and the end outgoing lines of the single-layer flat wires in the same stator slot are arranged in a staggered mode in whole or in part.
As a preferable scheme: the single-layer flat wires are even in number and are grouped in pairs, the outgoing lines of the single-layer flat wires in each group are composed of the modularized flat wires in the same position, and the outgoing lines of the adjacent groups of single-layer flat wires are staggered.
In order to achieve the above object of the second utility model, the present invention adopts the following technical solutions:
a stator assembly comprising a stator core and a stator winding as claimed in any preceding claim, the stator winding being inserted in a stator slot.
As a preferable scheme: the stator is characterized in that a cooling oil jacket is further sleeved outside the stator core, a plurality of radially extending oil spraying pipes are uniformly arranged on the inner walls of the two ends of the cooling oil jacket, a gap is formed by end windings of the single-layer flat wires, and the oil spraying pipes are arranged in the gap.
As a preferable scheme: the oil spraying pipe is hollow, one end of the oil spraying pipe is connected with the end of the cooling oil sleeve and is communicated with the end of the cooling oil sleeve, and an oil spraying hole is formed in the side wall of the other end of the oil spraying pipe.
As a preferable scheme: the oil spraying pipes at the end part of the cooling oil jacket are arranged in two layers along the axial direction, and the positions of the two layers of oil spraying pipes in the axial direction are staggered.
As a preferable scheme: the number of the oil spraying pipes is the same as that of the stator grooves, a plurality of groups of oil spraying holes are arranged on the oil spraying pipes, and the plurality of groups of oil spraying holes are arranged at intervals along the length direction of the oil spraying pipes.
In order to achieve the above object of the third utility model, the present invention adopts the following technical solutions:
a flat wire electric machine comprising a machine casing, a rotor assembly and a stator assembly as claimed in any one of the preceding claims.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, modular flat wire systems with various sizes are established, and grooves with different sizes are processed by different combinations in parallel, so that the expansion of a platform is facilitated; according to the alternating current loss principle of the flat wire motor, the flat wire close to the air gap is formed by winding more and smaller modularized flat wires in parallel, and the flat wire far away from the air gap is formed by winding fewer and larger modularized flat wires in parallel, so that the processing difficulty is reduced, and the groove filling rate is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is an exploded view of a flat wire motor according to the present invention;
FIG. 2 is a schematic structural view of a stator assembly of the present invention;
FIG. 3 is a schematic end view of various modular flat wires according to the present invention;
FIG. 4 is a schematic diagram showing the combination of single-layer flat wires in a stator slot and the staggering of end lead-out wires according to the present invention;
FIG. 5 is a schematic view of the overall structure of the cooling oil jacket, the oil spray pipe and the winding;
FIG. 6 is an enlarged view of part A of FIG. 5;
FIG. 7 is a schematic view of the fuel injection tube of the present invention;
fig. 8 is a schematic structural view of the cooling oil jacket.
The labels in the figures are: 1. a rotor assembly; 2. a front end cover; 3. a stator assembly; 4. a housing; 3-1, a stator core; 3-2, stator flat wire winding; 3-3, an oil spraying pipe; 3-4, cooling an oil jacket; 3-2-1, first layer of flat wire; 3-2-2, second layer of flat wires; 3-2-3, and a third layer of flat wire; 3-2-4, a fourth layer of flat wires; 3-2-5, fifth layer flat wire; 3-2-6, a sixth layer of flat wires; 3-3-1, oil spray holes; 3-4-1, oil outlet holes, 3-4-2 and cooling oil ducts.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, elements, and/or combinations thereof, unless the context clearly indicates otherwise.
Further, in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but 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 thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
The utility model is further illustrated by the following examples in conjunction with the following figures:
the flat-wire motor shown in fig. 1 includes a casing 4, a front end cover 2, a rotor assembly 1 and a stator assembly 3, wherein the rotor assembly 1 and the stator assembly 3 are disposed in a cavity formed by the front end cover 2 and the casing 4.
The stator assembly shown in fig. 2 comprises a stator core 3-1 and a stator flat wire winding 3-2; and the stator iron core is provided with a stator slot, and the stator flat wire winding is inserted in the stator slot. The winding comprises a single-layer flat wire formed by mutually winding a plurality of modular flat wires with different sectional areas, the single-layer flat wires are positioned in the same stator slot, and the single-layer flat wires closer to the rotor contain the more modular flat wires.
As shown in fig. 3, the modular flat wires are various, including a modular flat wire a, a modular flat wire B, a modular flat wire C and a modular flat wire D, wherein the length of the modular flat wire is L, and the widths of the modular flat wire a, the modular flat wire B and the modular flat wire D are L, L/2, L/4 and L/8 respectively; the length of the modularized flat wire E is 3/4L, and the widths of the modularized flat wire E, the modularized flat wire F, the modularized flat wire G and the modularized flat wire H are 3/4L, L/2, L/4 and L/8 respectively; the length of the modularized flat wire I is L/2, and the widths of the modularized flat wire I, the modularized flat wire J and the modularized flat wire K are L/2, L/4 and L/8 respectively; the length of the modularized flat wire L is L/4, and the width of the modularized flat wire M is L/8; and the length and the width of the modularized flat wire N are both L/8, and the single-layer flat wire is formed by winding any one or more modularized flat wires.
The utility model adopts the parallel winding type flat wire design; according to the requirements of the motor rotating speed of the flat wire motor and reduction of the alternating current loss degree of the winding, the flat wire is designed to be formed by regularly winding a plurality of small flat wires. In order to easily expand the flat wire according to different motor sizes, the flat wire is preferably designed to: the flat wires are standardized to be a set of specifications (as shown in figure 3), and the flat wires with different sizes in the set of specifications can be combined into parallel-wound flat wires matched with the size of the slot according to the size requirement of the motor slot. According to the skin effect principle, in order to effectively reduce the ac loss and ensure a high slot fill ratio, the flat wires at different radial directions are preferably designed as follows: the more closely spaced flat wires are comprised of more thin flat wires.
The end outgoing lines of the single-layer flat wires are formed by extending part of the modularized flat wires, and the end outgoing lines of the single-layer flat wires in the same stator slot are arranged in a staggered mode in whole or in part. Preferably, the method comprises the following steps: the single-layer flat wires are even in number and are grouped in pairs, the outgoing lines of the single-layer flat wires in each group are composed of the modularized flat wires in the same position, and the outgoing lines of the adjacent groups of single-layer flat wires are staggered.
As shown in fig. 4, taking 6 layers of flat wires in a slot as an example, the stator flat wire winding 3-2 includes a first layer of flat wires 3-2-1, a second layer of flat wires 3-2-2, a third layer of flat wires 3-2-3, a fourth layer of flat wires 3-2-4, a fifth layer of flat wires 3-2-5, and a sixth layer of flat wires 3-2-6; the bending directions of the end outgoing lines of the flat wires of the odd-numbered layers and the end outgoing lines of the flat wires of the even-numbered layers are opposite, and the end outgoing lines of the flat wires of the first layer 3-2-1 and the flat wires of the second layer 3-2-2 are formed by extending the modularized flat wires of the right side 1/3; the end outgoing lines of the third layer of flat wire 3-2-3 and the fourth layer of flat wire 3-2-4 are formed by extending the modularized flat wire in the middle 1/3; the end outgoing lines of the fifth layer of flat wires 3-2-5 and the sixth layer of flat wires 3-2-6 are formed by extending the modularized flat wires at the left side 1/3, so that the 6 layers of flat wires are arranged in a staggered mode.
The utility model designs the effective winding group in the groove to be formed by winding a plurality of flat wires in parallel, and the end part of the effective winding group only extends out of the flat wires, and the corresponding thickening treatment is carried out on the winding insulation layer at the part. Preferably designed as follows: the partial flat wires that the inslot different layers stretched out stagger and arrange, and this design can be solved traditional motor end winding and arrange too closely, causes the degree of difficulty, the inhomogeneous problem of tip heat dissipation to technologies such as welding.
As shown in fig. 5 to 8, a cooling oil jacket 3-4 is further sleeved outside the stator core, and a cooling oil duct 3-4-2 is arranged in the cooling oil jacket 3-4; and a plurality of radially extending oil spraying pipes 3-3 are uniformly arranged on the inner walls of the two ends of the cooling oil jacket, a gap is formed by the end windings of the single-layer flat wires, and the oil spraying pipes are arranged in the gap.
The oil injection pipe is hollow, one end of the oil injection pipe is connected and communicated with the oil outlet hole 3-4-1 at the end part of the cooling oil sleeve, and the side wall of the other end of the oil injection pipe is provided with the oil injection hole 3-3-1. The oil spraying pipes at the end part of the cooling oil jacket are arranged in two layers along the axial direction, and the positions of the two layers of oil spraying pipes in the axial direction are staggered. The number of the oil spraying pipes is the same as that of the stator grooves, a plurality of groups of oil spraying holes are arranged on the oil spraying pipes, and the plurality of groups of oil spraying holes are arranged at intervals along the length direction of the oil spraying pipes.
According to the utility model, the space generated by only extending part of the winding out of the end part is utilized, the oil injection pipe extends into the end winding, oil injection is carried out through the built-in oil injection hole, and the end winding is cooled from inside to outside more uniformly. Due to the large space of the end part, cooling oil can be sprayed to all positions of the end winding, and the temperature reduction of the winding and the shortening of the length of the end part compensate the resistance increase of the end winding caused by thinning.
The utility model provides a mixed parallel winding type flat wire stator winding easy for platform expansion, a stator assembly and a motor design, which can effectively reduce the alternating current loss of the flat wire winding, improve the platformization capacity of the flat wire, reduce the process difficulty, flexibly arrange a cooling structure, solve the problem of uneven oil spraying and cooling of an end winding and finally achieve the purposes of improving the output performance of the motor and reducing the cost.
The utility model establishes modular flat wire systems with various sizes, and the modular flat wire systems are wound in parallel through different combinations to deal with different sizes of grooves, thereby being beneficial to the expansion of a platform; according to the flat wire motor alternating current loss principle, the flat wire close to the air gap is formed by adopting more and smaller modularized flat wires in parallel winding, the flat wire far away from the air gap is formed by adopting fewer and larger modularized flat wires in parallel winding, so that the processing difficulty is reduced, the groove fullness is improved, and the scheme of the patent implementation is only a combination form of the design idea, and all related designs of parallel winding of the flat wire and modularization are in the protection range of the patent.
On the other hand, by utilizing the characteristic that the flat wire is wound in a multi-strand manner, the space adjacent to the end winding can be increased by arranging and leading out part of the end winding at each layer, and the design is preferably as follows: the flat wires extending out of different layers in the groove are arranged in a staggered mode. The winding inner space generated by leading out part of the end winding is utilized, the oil spraying pipe is deeply arranged in the gap of the end winding, the oil spraying hole sprays oil from inside to outside, the contact area of cooling oil and the end winding is greatly improved, and the end winding effectively dissipates heat. The design can solve the problems that the arrangement of the end winding of the existing flat wire motor is too tight, the process difficulty of welding and the like is high, and the heat dissipation of the end part is not uniform, and meanwhile, the weight of the motor can be reduced, the materials are saved, and the purpose of reducing the cost is achieved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the principle and spirit of the present invention, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.
Claims (10)
1. A mixed parallel wound flat wire stator winding characterized in that: the stator comprises a single-layer flat wire formed by mutually winding a plurality of modular flat wires with different sectional areas, and a plurality of single-layer flat wires positioned in the same stator slot, wherein the single-layer flat wire closer to the rotor contains a larger number of modular flat wires.
2. A hybrid parallel wound flat wire stator winding according to claim 1, wherein: the modularized flat wire comprises a plurality of modularized flat wires, namely a modularized flat wire A, a modularized flat wire B, a modularized flat wire C and a modularized flat wire D, wherein the modularized flat wire A has a length of L, and widths of L, L/2, L/4 and L/8 respectively; the length of the modularized flat wire E is 3/4L, and the widths of the modularized flat wire E, the modularized flat wire F, the modularized flat wire G and the modularized flat wire H are 3/4L, L/2, L/4 and L/8 respectively; the length of the modularized flat wire I is L/2, and the widths of the modularized flat wire I, the modularized flat wire J and the modularized flat wire K are L/2, L/4 and L/8 respectively; the length of the modularized flat wire L is L/4, and the width of the modularized flat wire M is L/8; and the length and the width of the modularized flat wire N are both L/8, and the single-layer flat wire is formed by winding any one or more modularized flat wires.
3. A hybrid parallel wound flat wire stator winding according to claim 1, wherein: the end outgoing lines of the single-layer flat wires are formed by extending part of the modularized flat wires, and the end outgoing lines of the single-layer flat wires in the same stator slot are arranged in a staggered mode in whole or in part.
4. A hybrid parallel wound flat wire stator winding according to claim 3, wherein: the single-layer flat wires are even in number and are grouped in pairs, the outgoing lines of the single-layer flat wires in each group are composed of the modularized flat wires in the same position, and the outgoing lines of the adjacent groups of single-layer flat wires are staggered.
5. A stator assembly, characterized by: comprising a stator core and a stator winding according to any of claims 1-4, said stator winding being inserted in stator slots.
6. A stator assembly according to claim 5, wherein: the stator is characterized in that a cooling oil jacket is further sleeved outside the stator core, a plurality of radially extending oil spraying pipes are uniformly arranged on the inner walls of the two ends of the cooling oil jacket, a gap is formed by end windings of the single-layer flat wires, and the oil spraying pipes are arranged in the gap.
7. A stator assembly according to claim 6, wherein: the oil spraying pipe is hollow, one end of the oil spraying pipe is connected with the end of the cooling oil sleeve and is communicated with the end of the cooling oil sleeve, and an oil spraying hole is formed in the side wall of the other end of the oil spraying pipe.
8. A stator assembly according to claim 6, wherein: the oil spraying pipes at the end part of the cooling oil jacket are arranged in two layers along the axial direction, and the positions of the two layers of oil spraying pipes in the axial direction are staggered.
9. A stator assembly according to claim 6, wherein: the number of the oil spraying pipes is the same as that of the stator grooves, a plurality of groups of oil spraying holes are arranged on the oil spraying pipes, and the plurality of groups of oil spraying holes are arranged at intervals along the length direction of the oil spraying pipes.
10. A flat wire motor is characterized in that: comprising a machine housing, a rotor assembly and a stator assembly according to any of claims 5 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220229197.6U CN216872950U (en) | 2022-01-27 | 2022-01-27 | Mixed parallel winding type flat wire stator winding, stator assembly and flat wire motor |
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| CN202220229197.6U CN216872950U (en) | 2022-01-27 | 2022-01-27 | Mixed parallel winding type flat wire stator winding, stator assembly and flat wire motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115276288A (en) * | 2022-07-29 | 2022-11-01 | 天蔚蓝电驱动科技(江苏)有限公司 | Flat wire motor stator and flat wire motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115276288A (en) * | 2022-07-29 | 2022-11-01 | 天蔚蓝电驱动科技(江苏)有限公司 | Flat wire motor stator and flat wire motor |
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