CN216981640U - Motor stator and motor assembly - Google Patents
Motor stator and motor assembly Download PDFInfo
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- CN216981640U CN216981640U CN202123039695.9U CN202123039695U CN216981640U CN 216981640 U CN216981640 U CN 216981640U CN 202123039695 U CN202123039695 U CN 202123039695U CN 216981640 U CN216981640 U CN 216981640U
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- stator
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Abstract
The utility model discloses a motor stator and a motor assembly, wherein the motor stator comprises: the stator comprises a stator core, a plurality of coils and insulating paper, wherein a plurality of stator slots are formed in the stator core; the plurality of coils are respectively arranged in the plurality of stator slots in a penetrating way; the insulating paper wraps the outside of the coil, the head end and the tail end of the insulating paper are overlapped in the circumferential direction of the stator core 10 to form an overlapped part, and a groove for accommodating the overlapped part is formed in the inner surface of the stator slot. According to the motor stator provided by the embodiment of the utility model, the grooves are formed in the inner surfaces of the stator grooves and used for accommodating the overlapped parts of the insulating paper, so that the stability of the motor stator can be effectively improved, and the groove filling rate is improved.
Description
Technical Field
The utility model relates to the technical field of energy conversion equipment, in particular to a motor stator and a motor assembly with the motor stator.
Background
In the motor stator, generally, the coil needs to be wrapped with insulating paper so as to facilitate insulation between the coil and the stator core and delay the service life of the motor. In the correlation technique, motor stator includes stator core, multilayer coil and multilayer coil insulation paper, and motor stator's first U type groove insulation paper and second U type groove insulation paper set up relatively each other, and the second lateral part of second U type groove insulation paper forms alternately overlapping with the first lateral part overlap joint of first U type groove insulation paper to live coil parcel completely and keep apart completely with stator core, make between the two completely insulating, can not take place the short circuit that discharges.
However, in the related art, since the insulating paper has the overlapping portion, the slot fullness is reduced because the overlapping portion occupies a certain space of the stator slot; the insulating ability between the coil and the stator core is lowered. In addition, the motor stator in the related technology has complex process and low reliability, because two pieces of insulating paper need to be inserted into the slot, the time of the paper insertion link is increased, and the reliability is reduced; the width of the root of the stator tooth is narrowed because both sides of the root of the tooth are simultaneously grooved.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to provide a stator for an electric motor, in which a groove is formed on an inner surface of a stator slot for receiving an overlapping portion of an insulating paper, so that the stability of the stator for an electric motor can be effectively improved, and the slot fullness can be improved.
Another object of the present invention is to provide an electric motor assembly, which includes the aforementioned electric motor stator.
The motor stator according to the embodiment of the utility model comprises: the stator comprises a stator core, a plurality of coils and insulating paper, wherein a plurality of stator slots are formed in the stator core; the plurality of coils are respectively arranged in the plurality of stator slots in a penetrating way; the insulating paper wraps the outside of the coil, the head end and the tail end of the insulating paper are overlapped in the circumferential direction of the stator core to form an overlapped part, and a groove for accommodating the overlapped part is formed in the inner surface of the stator slot.
According to the motor stator provided by the embodiment of the utility model, the grooves are formed in the inner surfaces of the stator grooves and used for accommodating the overlapped parts of the insulating paper, so that the stability of the motor stator can be effectively improved, and the groove filling rate is improved.
In addition, the motor stator according to the above embodiment of the present invention may further have the following additional technical features:
optionally, the groove is provided on one side surface of the stator slot in the circumferential direction of the stator core.
Optionally, the grooves in a plurality of said stator slots are all located on the same side of the stator slot.
Optionally, the groove is provided on a side of the stator slot near a bottom of the stator slot.
Optionally, the groove is provided on a side of the stator slot adjacent to the slot opening of the stator slot.
Optionally, the overlapping length of the insulating paper is not less than 2 mm.
Optionally, a ratio of the depth of the groove to the thickness of the insulating paper is in a range of 1 to 2.
Optionally, the overlapping portion fills the recess.
Optionally, the insulating paper is of a unitary structure.
Optionally, the coil is a multilayer coil structure.
The motor assembly comprises a motor stator and a motor rotor, wherein the motor stator is the motor stator; the motor rotor is rotatably embedded in the motor stator, and the plurality of stator slots are spaced around the motor rotor.
Drawings
Fig. 1 is a schematic view of a stator of an electric machine according to an embodiment of the present invention.
Fig. 2 is a partially enlarged schematic view of the area circled a in fig. 1.
Fig. 3 is a schematic view of fig. 1 in which the coil and the insulating paper are not disposed in the area of the circle a, wherein the dotted line is a reference line, and only the distinguishing groove.
Fig. 4 is a schematic view of a stator of an electric machine according to another embodiment of the present invention.
Fig. 5 is a partially enlarged schematic view of the area circled a in fig. 4.
Fig. 6 is a schematic view of fig. 4 in which the coil and the insulating paper are not disposed in the area of the circle a, wherein the dotted line is a reference line, only to distinguish the grooves.
Reference numerals: motor stator 100, stator core 10, coil 20, insulating paper 30, stator slot 101, groove 102, and overlapping portion 31.
Detailed Description
Generally, the insulation paper separating the stator core and the coil has overlapped parts, and the overlapped parts occupy certain space on two sides of the overlapped parts in the stator slot besides the space occupied by the overlapped parts, so that certain influence is generated on the inner space of the stator slot, and the performance of the motor stator is further influenced. To this end, the present invention provides a motor stator 100, in which the groove 102 is provided to give way to the overlapping portion 31 to reduce the influence of the overlapping portion 31 of the insulation paper 30 on the performance of the motor stator 100.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
As shown in fig. 1 to 6, a motor stator 100 according to an embodiment of the present invention includes: the stator comprises a stator core 10, a plurality of coils 20 and insulating paper 30, wherein a plurality of stator slots 101 are formed in the stator core 10, and the plurality of stator slots 101 can be arranged along the circumferential direction of the stator core 10. The plurality of coils 20 are respectively inserted into the plurality of stator slots 101. Insulating paper 30 parcel is outside coil 20, through insulating paper 30, can separate coil 20 and stator core 10 insulatingly to avoided stator core 10 to the wearing and tearing of coil 20, even simultaneously coil 20 wearing and tearing back, owing to insulating paper 30's setting, also can keep apart stator core 10 and coil 20 stably, improved motor stator 100's stability. The two ends of the insulating paper 30 are overlapped along the circumferential direction of the stator core 10 to form the overlapping portion 31, wherein a groove 102 for accommodating the overlapping portion 31 is formed on the inner surface of the stator slot 101, so that the groove 102 provides a way for the overlapping portion 31 to reduce the influence of the overlapping portion 31 on the space in the stator slot 101.
According to the motor stator 100 of the embodiment of the utility model, the groove 102 is provided on the inner surface of the stator slot 101 for accommodating the overlapping portion 31 of the insulating paper 30, so that more space can be provided in the stator slot 101 for accommodating the coil 20, that is, a larger volume of wound coil can be accommodated in the stator slot 101, and thus, the stability of the motor stator 100 can be effectively improved and the slot filling rate can be improved.
The groove 102 of the present invention may be disposed on a bottom surface or a notch of the stator slot 101, wherein the bottom surface of the stator slot 101 is a surface of the stator slot 101 opposite to the notch, and the notch of the stator slot 101 refers to a opening of the stator slot 101 that opens toward a central hole thereof. Of course, the grooves 102 in the present invention may also be disposed on the side surfaces of the stator slots 101, wherein the side surfaces of the stator slots 101 refer to the surfaces perpendicular to the circumferential direction of the stator core 10 in the stator slots 101, or the side surfaces of the stator slots 101 refer to two surfaces opposite to each other along the circumferential direction of the stator core 10, and the grooves 102 may be disposed on one of the surfaces. In contrast, the position where the insulating paper 30 overlaps in the present application is not at the groove bottom or notch in the radial direction of the stator groove 101, and the overlapping portion 31 is not separated by the force generated by the twisting of the coil at this position, so that the motor insulating capability is secured. Referring to fig. 3 and 6, a groove 102 is provided on the left or right side surface inside the stator slot 101.
The grooves 102 in the plurality of stator slots 101 are all located on the same side of the stator slot 101. In other words, as shown in the figure, the groove 102 provided on the inner side surface of each stator slot 101 is located on the left side surface of the stator slot 101; or a groove 102 provided on the inner side of each stator slot 101 is located on the right side of the stator slot 101. Thereby, it is possible to facilitate the unification of the structure and shape of the plurality of stator slots 101, the molding of the stator core 10, and the improvement of the performance of the motor stator 100. In addition, if the grooves 102 in the plurality of stator slots 101 are not located on the same side of the stator slot 101, the grooves 102 may be formed on both sides of some stator teeth, which may reduce the strength of the stator teeth and affect the reliability of the motor stator 100.
In some embodiments, the groove 102 is provided on a side of the stator slot 101 near a bottom of the stator slot 101. Of course, in the present invention, the groove 102 may be provided on the side surface of the stator slot 101 at a position close to the notch of the stator slot 101.
In some embodiments, the overlapping length of the insulating paper 30 is not less than 2 mm. Therefore, the structural stability of the insulation paper 30 can be effectively improved, the problem that the head end and the tail end of the insulation paper 30 cannot be overlapped due to assembly errors, production errors and the like is avoided, and the stability and the service life of the motor stator 100 are guaranteed.
In some embodiments, the ratio of the depth of the groove 102 to the thickness of the insulating paper 30 is in the range of 1 to 2. Therefore, the secondary-stacked part of the insulation paper 30 can be accommodated in the groove 102 without affecting the structural strength and the magnetic conductivity of the stator core 10, and the stability of the motor stator 100 can be effectively improved.
Optionally, the overlapping portion 31 fills the recess 102. Therefore, the influence of the arrangement of the grooves 102 on the stator core 10 can be further reduced, and the performance of the motor stator 100 can be effectively improved.
In some embodiments, the insulating paper 30 is a unitary structure. That is, the insulation paper 30 is formed by winding the entire sheet of paper around the coil 20, and is not formed by combining a plurality of sheets of paper, so that the overlapped portion of the insulation paper 30 can be controlled at one position, and the stability and the operation efficiency of the motor stator 100 can be improved.
In addition, the coil 20 in the present embodiment may have a single-layer coil structure or a multilayer coil structure.
The motor assembly according to the embodiment of the utility model comprises a motor stator 100 and a motor rotor, wherein the motor stator 100 is the motor stator 100; the motor rotor is rotatably embedded in motor stator 100, and a plurality of stator slots 101 are spaced around the motor rotor.
Therefore, by providing the motor stator 100, the coil 20 and the stator core 10 can be insulated and separated, so that the abrasion of the stator core 10 to the coil 20 is avoided, and even if the coil 20 is abraded, the stator core 10 and the coil 20 can be stably separated due to the arrangement of the insulating paper 30, thereby improving the stability of the motor stator 100. The two ends of the insulating paper 30 are overlapped along the circumferential direction of the stator core 10 to form the overlapping portion 31, wherein the inner surface of the stator slot 101 is provided with a groove 102 for accommodating the overlapping portion 31, so that the groove 102 provides a relief for the overlapping portion 31 to reduce the influence of the overlapping portion 31 on the space in the stator slot 101. The grooves 102 are formed on the inner surface of the stator slot 101 for accommodating the overlapping portion 31 of the insulating paper 30, so that more space is available in the stator slot 101 for accommodating the coil 20, that is, a larger volume of wound coil can be accommodated in the stator slot 101, thereby effectively improving the stability of the motor stator 100 and increasing the slot filling rate.
The present invention is directed to provide a motor stator 100, in which the motor stator 100 can prevent the coil 20 and the stator core 10 from discharging through air, prevent short circuit, and slightly increase the slot filling factor of the motor having the insulation paper 30.
In order to achieve the purpose, the technical scheme of the utility model is realized as follows: the motor stator 100 comprises a stator core 10, a plurality of layers of coils 20 and insulating paper 30 (O-shaped slot insulating paper 30), wherein a plurality of stator slots 101 are formed in the stator core 10, the plurality of layers of coils 20 are arranged in each stator slot 101 in a penetrating manner, the insulating paper 30 of the plurality of layers of coils 20 is wrapped outside the coils 20, extending portions are respectively formed at the head end and the tail end of the insulating paper 30, the extending portions at the head end and the tail end of the insulating paper 30 are intersected along the circumferential direction of the stator core 10 to generate an overlapping portion 31, a groove 102 for accommodating the overlapping portion 31 of the extending portion is formed in one side wall of the stator slot 101, and the groove 102 is basically filled with the overlapping portion 31. The length of the extending parts of the insulating paper 30 from head to tail is 2-5 mm. The length of the overlapped part 31 of the head and tail extension parts of the insulating paper 30 is more than 2 mm. The groove 102 may be on the left or right side of the circumferential position of the stator slot 101. Further, the position of the groove 102 on the side of the stator slot 101 is not fixed, and may be biased toward the slot opening or the slot bottom.
The stator slot 101 of the stator core 10 of the present invention has a groove 102 at the bottom, and the overlapping portion 31 of the slot insulating paper 30 is located at the position of the groove 102. The bottom groove 102 of the stator slot 101 of the stator core 10 of the utility model is only positioned at one side of the circumferential position of the slot, and only one piece of insulating paper 30 is needed in the slot.
The technical points of the utility model are as follows: according to the utility model, the groove 102 is formed at the bottom of the stator slot 101 which has small influence on the electromagnetic performance (the saturation degree of the magnetic circuit is low) and is used for accommodating the overlapping part 31 of the insulating paper 30, so that the space (effective area) of the stator slot 101 is slightly increased, the space in the slot is further saved, the slot filling rate of the motor is slightly increased, the sectional area of the coil 20 of the motor is further increased, the heat productivity of the motor is reduced, and the output performance and the operating efficiency of the motor can be improved; the position where the insulating paper 30 of the multilayer coil 20 is overlapped is not at the groove bottom or the notch of the axial end part of the stator groove 101, and the overlapped part 31 is not separated at the position of the insulating paper 30 of the groove due to the force generated by the twisting of the coil, so that the insulating capability of the motor is ensured; according to the utility model, only one piece of insulating paper 30 is used, so that the time for inserting the paper into the slot is reduced, and the reliability of the process for inserting the insulating paper 30 into the stator slot 101 is improved; single sided slotting can reduce the effect on the width at the root of the stator.
Fig. 1 to 3 show schematic views of a stator 100 of an electric machine according to an embodiment of the present invention, in which a groove 102 is provided on the left side of a stator slot 101 and is located at the bottom of the stator slot 101, wherein two ends of an insulating paper 30 are overlapped at a position close to the bottom of the stator slot 101, specifically, a first end of the insulating paper 30 is close to the bottom of the stator slot 101, and a second end of the insulating paper 30 overlaps the outside of the first end after bypassing the slot opening and the bottom of the stator slot 101, and the second end of the insulating paper 30 is embedded in the groove 102.
Fig. 4 to 6 show schematic views of a stator 100 of an electric machine according to another embodiment of the present invention, in which a groove 102 is provided on the right side of a stator slot 101 and is located at the bottom of the stator slot 101, wherein two ends of an insulating paper 30 are overlapped at a position close to the bottom of the stator slot 101, specifically, a first end of the insulating paper 30 is close to the bottom of the stator slot 101, and a second end of the insulating paper 30 overlaps the outside of the first end after bypassing the slot opening and the bottom of the stator slot 101, and the second end of the insulating paper 30 is embedded in the groove 102.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.
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 implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description of the specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means 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 are not necessarily intended to 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. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. An electric machine stator, comprising:
a stator core having a plurality of stator slots formed therein;
a plurality of coils respectively inserted into the plurality of stator slots;
the insulating paper is wrapped outside the coil, the head end and the tail end of the insulating paper are overlapped along the circumferential direction of the stator core to form an overlapped part,
and the inner surface of the stator slot is provided with a groove for accommodating the overlapping part.
2. The electric machine stator of claim 1, wherein the groove is provided on one side surface of the stator slot in a circumferential direction of the stator core.
3. The electric machine stator of claim 2, wherein a plurality of the grooves are each located on the same side of a corresponding stator slot.
4. Motor stator according to claim 2,
the groove is arranged on the side surface of the stator groove and close to the bottom of the stator groove; and/or
The groove is arranged on the side surface of the stator slot and close to the notch of the stator slot.
5. The motor stator according to claim 2, wherein the overlapping length of the insulating paper is not less than 2 mm.
6. The motor stator according to claim 1, wherein a ratio of a depth of the groove to a thickness of the insulating paper is in a range of 1 to 2.
7. An electric machine stator according to claim 1, wherein the overlapping portion fills the groove.
8. The electric machine stator of claim 1, wherein the insulating paper is a unitary structure.
9. The electric machine stator of claim 1, wherein the coil is a multi-layer coil structure.
10. An electric machine assembly, comprising:
a motor stator according to any one of claims 1-9;
a motor rotor rotatably embedded in the motor stator, the plurality of stator slots being spaced around the motor rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123039695.9U CN216981640U (en) | 2021-11-30 | 2021-11-30 | Motor stator and motor assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123039695.9U CN216981640U (en) | 2021-11-30 | 2021-11-30 | Motor stator and motor assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216981640U true CN216981640U (en) | 2022-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123039695.9U Active CN216981640U (en) | 2021-11-30 | 2021-11-30 | Motor stator and motor assembly |
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|---|---|
| CN (1) | CN216981640U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024115374A1 (en) * | 2022-12-02 | 2024-06-06 | Jaguar Land Rover Limited | Stator core |
-
2021
- 2021-11-30 CN CN202123039695.9U patent/CN216981640U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024115374A1 (en) * | 2022-12-02 | 2024-06-06 | Jaguar Land Rover Limited | Stator core |
| GB2625065A (en) * | 2022-12-02 | 2024-06-12 | Jaguar Land Rover Ltd | Stator core |
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