CN113675963A - Stator punching sheet, stator with same, motor and electrical equipment - Google Patents
Stator punching sheet, stator with same, motor and electrical equipment Download PDFInfo
- Publication number
- CN113675963A CN113675963A CN202010404312.4A CN202010404312A CN113675963A CN 113675963 A CN113675963 A CN 113675963A CN 202010404312 A CN202010404312 A CN 202010404312A CN 113675963 A CN113675963 A CN 113675963A
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- China
- Prior art keywords
- stator
- tooth
- pole piece
- crown
- yoke
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a stator punching sheet, a stator with the stator punching sheet, a motor and electrical equipment. The stator punching sheet comprises: a stator yoke; a plurality of first stator teeth, each first stator tooth comprising a first tooth body and a first tooth crown, the first tooth crown being connected to the first tooth body, the first tooth body being connected to the stator yoke; and a plurality of second stator teeth, each of which includes a second tooth body connected to the second tooth body and a second tooth crown connected to the stator yoke, the plurality of first stator teeth and the plurality of second stator teeth being alternately arranged in a circumferential direction of the stator yoke, a shape and/or size of the first tooth crown of at least one first stator tooth being different from a shape and/or size of the second tooth crown of at least one second stator tooth. By utilizing the stator punching sheet provided by the embodiment of the invention, the equivalent air gap of the motor can be reduced, and the output torque of the motor can be improved.
Description
Technical Field
The invention relates to the field of motors, in particular to a stator punching sheet, and further relates to a stator, a motor and electrical equipment with the stator punching sheet.
Background
The related art single-phase brushless dc motor has only 1-phase winding, so there is a dead point position and the starting performance of the motor is poor. In order to solve the problem, a gradual air gap structure is adopted, namely the radius from the stator magnetic pole or the rotor magnetic pole to the center of the stator is gradually reduced or gradually increased along the rotation direction of the rotor. Although the structure can shift the central line of the magnetic poles of the stator and the rotor to avoid the dead point position, the equivalent air gap of the motor is large, and the output torque is reduced.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention provides a stator punching sheet, a stator with the stator punching sheet, a motor and electrical equipment.
The stator punching sheet provided by the embodiment of the invention comprises: a stator yoke; a plurality of first stator teeth, each of the first stator teeth comprising a first tooth body and a first tooth crown, the first tooth crown being connected to the first tooth body, the first tooth body being connected to the stator yoke; and a plurality of second stator teeth, each of which includes a second tooth body connected to the second tooth body and a second tooth crown connected to the stator yoke, the plurality of first stator teeth and the plurality of second stator teeth being alternately arranged in a circumferential direction of the stator yoke, wherein a shape of the first tooth crown of at least one of the first stator teeth is different from a shape of the second tooth crown of at least one of the second stator teeth and/or a size of the first tooth crown of at least one of the first stator teeth is different from a size of the second tooth crown of at least one of the second stator teeth.
By utilizing the stator punching sheet provided by the embodiment of the invention, the equivalent air gap of the motor can be reduced, and the output torque of the motor can be improved.
Alternatively, the first crowns of the first stator teeth may be identical in shape and size to each other, and the second crowns of the second stator teeth may be identical in shape and size to each other.
Optionally, the first crowns comprise first and second pole pieces, the second crowns comprise third and fourth pole pieces, wherein the shape of the first pole piece of each first stator tooth is different from the shape of the second pole piece of the respective first stator tooth and/or the size of the first pole piece of each first stator tooth is different from the size of the second pole piece of the respective first stator tooth.
Optionally, at least a portion of the first pole piece of each first stator tooth has a width less than a width of the second pole piece of the respective first stator tooth.
Optionally, each of the first pole shoes has opposite first and second rims in a radial direction of the stator yoke, the first rims are adjacent to the stator yoke opposite the second rims in the radial direction of the stator yoke, and each of the first rims is provided with a notch.
Optionally, a length of the first pole piece of each of the first stator teeth is less than a length of the second pole piece of the respective first stator tooth.
Optionally, the plurality of second pole pieces, the plurality of third pole pieces and the plurality of fourth pole pieces are identical to each other in shape and size.
Optionally, each of the plurality of first pole pieces, the plurality of second pole pieces, the plurality of third pole pieces and the plurality of fourth pole pieces has opposing first and second rims in a radial direction of the stator yoke, the first rim being adjacent to the stator yoke opposite the second rim in the radial direction of the stator yoke, wherein the second rims of each of the plurality of first, second, third and fourth pole pieces lie on the same circumference.
The stator comprises a plurality of stator laminations, and each stator lamination is the stator lamination according to the embodiment of the invention.
Therefore, by using the stator according to the embodiment of the invention, the equivalent air gap of the motor can be reduced, and the output torque of the motor can be improved.
The motor according to an embodiment of the present invention includes: a rotor; and a stator according to an embodiment of the present invention.
The motor provided by the embodiment of the invention has the advantages of small equivalent air gap and large output torque.
Optionally, a non-uniform air gap is formed between the rotor and a first crown of the stator, and a uniform air gap is formed between the rotor and a second crown of the stator.
An electrical device according to an embodiment of the invention comprises a motor according to an embodiment of the invention.
The electrical equipment provided by the embodiment of the invention has the advantage of high efficiency.
Drawings
Fig. 1 is a schematic structural diagram of a stator lamination according to an embodiment of the invention;
fig. 2 is a schematic structural diagram of a stator punching sheet according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a stator punching sheet according to an embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A stator punching sheet 10 according to an embodiment of the present invention is described below with reference to the drawings. As shown in fig. 1 to 3, a stator punching sheet 10 according to an embodiment of the present invention includes a stator yoke 110, a plurality of first stator teeth 120, and a plurality of second stator teeth 130.
Each of the first stator teeth 120 includes a first tooth body 121 and a first tooth crown 124, the first tooth crown 124 is connected to the first tooth body 121, and the first tooth body 121 is connected to the stator yoke 110. Each of the second stator teeth 130 includes a second tooth body 131 and a second tooth crown 134, the second tooth crown 134 is connected to the second tooth body 131, and the second tooth body 131 is connected to the stator yoke 110. The plurality of first stator teeth 120 and the plurality of second stator teeth 130 are alternately arranged in the circumferential direction of the stator yoke 110, that is, the plurality of first tooth bodies 121 and the plurality of second tooth bodies 131 are alternately arranged in the circumferential direction of the stator yoke 110.
Wherein a shape of the first crown 124 of the at least one first stator tooth 120 is different from a shape of the second crown 134 of the at least one second stator tooth 130, and/or a size of the first crown 124 of the at least one first stator tooth 120 is different from a size of the second crown 134 of the at least one second stator tooth 130.
Therefore, the stator punching sheet 10 can have an asymmetric structure, so that the center line of the stator magnetic field and the center line of the rotor magnetic field can deviate, namely a certain deviation angle can be generated between the stator magnetic field and the rotor magnetic field, so that dead point positions are avoided, and the motor is started.
Also, since the shape and/or size of the first crown 124 of the at least one first stator tooth 120 is different from the shape and/or size of the second crown 134 of the at least one second stator tooth 130, it is possible to change only the shape and/or size of one of the first crown 124 and the second crown 134 without changing the shape and/or size of the other of the first crown 124 and the second crown 134. That is, only a part of the tooth crowns of the stator lamination 10 is designed to be shifted (asymmetrical design). Therefore, the equivalent air gap in the magnetic circuit of the motor with the stator punching sheet 10 is smaller, the output torque of the motor can be improved, the starting dead point position can be avoided, and the starting problem of a single-phase motor is solved.
Therefore, by using the stator punching sheet 10 according to the embodiment of the invention, the equivalent air gap of the motor can be reduced, and the output torque of the motor can be improved.
As shown in fig. 1 to 3, the stator punching sheet 10 includes a stator yoke 110, a plurality of first stator teeth 120, and a plurality of second stator teeth 130. The plurality of first stator teeth 120 and the plurality of second stator teeth 130 are alternately arranged in the circumferential direction of the stator yoke 110, that is, the plurality of first tooth bodies 121 and the plurality of second tooth bodies 131 are alternately arranged in the circumferential direction of the stator yoke 110.
Each of the first stator teeth 120 includes a first tooth body 121 and a first tooth crown 124, the first tooth crown 124 is connected to the first tooth body 121, and the first tooth body 121 is connected to the stator yoke 110. Each of the second stator teeth 130 includes a second tooth body 131 and a second tooth crown 134, the second tooth crown 134 is connected to the second tooth body 131, and the second tooth body 131 is connected to the stator yoke 110.
The first crown 124 may be connected to the first body 121 in a known manner, the second crown 134 may be connected to the second body 131 in a known manner, and the first and second bodies 121 and 131 may be connected to the stator yoke 110 in a known manner. Since this is irrelevant to the point of the present application, it is not described in detail.
Alternatively, the first crowns 124 of the plurality of first stator teeth 120 are identical to each other in shape and size, and the second crowns 134 of the plurality of second stator teeth 130 are identical to each other in shape and size. Therefore, the equivalent air gap of the motor with the stator punching sheet 10 can be further reduced, and the output torque of the motor can be further improved.
As shown in fig. 1-3, the first crown 124 includes a first pole piece 122 and a second pole piece 123, and the second crown 134 includes a third pole piece 132 and a fourth pole piece 133. The first pole piece 122 and the second pole piece 123 may be connected to the first tooth body 121 in a known manner, and the third pole piece 132 and the fourth pole piece 133 may be connected to the second tooth body 131 in a known manner.
For example, an end of the first pole piece 122 is connected to an end of the first tooth body 121, an end of the second pole piece 123 is connected to an end of the first tooth body 121, the first pole piece 122 extends from the first tooth body 121 in a clockwise direction, and the second pole piece 123 extends from the first tooth body 121 in a counterclockwise direction; an end of the third pole piece 132 is connected to an end of the second body 131, an end of the fourth pole piece 133 is connected to an end of the second body 131, the third pole piece 132 extends from the second body 131 in a clockwise direction, and the fourth pole piece 133 extends from the second body 131 in a counterclockwise direction.
As shown in fig. 1-3, the first pole piece 122 of each first stator tooth 120 has a shape different from the shape of the second pole piece 123 of the corresponding first stator tooth 120, and/or the first pole piece 122 of each first stator tooth 120 has a size different from the size of the second pole piece 123 of the corresponding first stator tooth 120. In other words, the shape of the first pole piece 122 is different from the shape of the second pole piece 123 and/or the size of the first pole piece 122 is different from the size of the second pole piece 123 for the same first stator tooth 120. Therefore, the equivalent air gap of the motor with the stator punching sheet 10 can be further reduced, and the output torque of the motor can be further improved.
Alternatively, the third pole piece 132 and the fourth pole piece 133 are symmetrical with respect to the center line of the second tooth body 131, and the first pole piece 122 and the second pole piece 123 are asymmetrical with respect to the center line of the first tooth body 121.
As shown in fig. 1 and 3, at least a portion of the first pole piece 122 of each first stator tooth 120 has a width smaller than a width of the second pole piece 123 of the corresponding first stator tooth 120. The width of the first pole piece 122 refers to: the dimension of the first pole shoe 122 in the radial direction of the stator yoke 110; the width of the second pole piece 123 refers to: the dimension of the second pole piece 123 in the radial direction of the stator yoke 110.
That is, for the same first stator tooth 120, the width of at least a portion of the first pole piece 122 is smaller than the width of the second pole piece 123. Therefore, the equivalent air gap of the motor with the stator punching sheet 10 can be further reduced, and the output torque of the motor can be further improved.
Alternatively, as shown in fig. 1, the width of the first pole piece 122 of each first stator tooth 120 is smaller than the width of the second pole piece 123 of the corresponding first stator tooth 120. Therefore, the equivalent air gap of the motor with the stator punching sheet 10 can be further reduced, and the output torque of the motor can be further improved.
As shown in fig. 3, each first pole piece 122 has opposing first and second rims 1221, 1222 in a radial direction of the stator yoke 110. The first rim 1221 is adjacent to the stator yoke 110 in the radial direction of the stator yoke 110 with respect to the second rim 1222. Wherein each first edge 1221 is provided with a notch 1223. Therefore, the equivalent air gap of the motor with the stator punching sheet 10 can be further reduced, and the output torque of the motor can be further improved.
Furthermore, by providing the gap 1223 at the first edge 1221, i.e. the gap 1223 is provided at the edge of the first pole piece 122 facing away from the rotor, the air gap between the rotor and the stator, i.e. the air gap of the electrical machine, is not increased. Alternatively, the indentations 1223 may be arcuate.
As shown in fig. 2, a length of the first pole piece 122 of each first stator tooth portion 120 is smaller than a length of the second pole piece 123 of the corresponding first stator tooth portion 120. The length of the first pole piece 122 refers to: the dimension of the first pole shoe 122 in the circumferential direction of the stator yoke 110; the length of the second pole piece 123 refers to: the dimension of the second pole shoe 123 in the circumferential direction of the stator yoke 110.
In other words, the length of the first pole piece 122 is smaller than the length of the second pole piece 123 for the same first stator tooth 120. Therefore, the equivalent air gap of the motor with the stator punching sheet 10 can be further reduced, and the output torque of the motor can be further improved.
As shown in fig. 1 to 3, the plurality of second pole pieces 123, the plurality of third pole pieces 132, and the plurality of fourth pole pieces 133 are identical to each other in shape and size. Therefore, the equivalent air gap of the motor with the stator punching sheet 10 can be further reduced, and the output torque of the motor can be further improved.
As shown in fig. 1-3, each of the first pole piece 122, the second pole piece 123, the third pole piece 132 and the fourth pole piece 133 has a first edge 1221 and a second edge 1222 opposite to each other in the radial direction of the stator yoke 110, i.e., each pole piece of the stator lamination 10 has a first edge 1221 and a second edge 1222 opposite to each other in the radial direction of the stator yoke 110.
The first rim 1221 is adjacent to the stator yoke 110 in the radial direction of the stator yoke 110 with respect to the second rim 1222, i.e., the second rim 1222 is adjacent to the rotor in the radial direction of the stator yoke 110 (the radial direction of the stator) with respect to the first rim 1221. Wherein the second rims 1222 of each of the plurality of first pole pieces 122, the plurality of second pole pieces 123, the plurality of third pole pieces 132, and the plurality of fourth pole pieces 133 are located on the same circumference. This reduces the equivalent air gap of the electric machine with the stator lamination 10, so that the torque of the electric machine can be increased.
The invention also provides a stator. The stator according to the embodiment of the present invention includes a plurality of stator laminations 10 according to the above-described embodiment of the present invention. Therefore, by using the stator according to the embodiment of the invention, the equivalent air gap of the motor can be reduced, and the output torque of the motor can be improved.
The invention also provides a motor. A motor according to an embodiment of the present invention includes a rotor and a stator according to the above-described embodiment of the present invention. Therefore, the motor provided by the embodiment of the invention has the advantages of small equivalent air gap, large output torque and the like.
Optionally, a non-uniform air gap is formed between the rotor and the first crown 124 of the stator and a uniform air gap is formed between the rotor and the second crown 134 of the stator.
The invention also provides electrical equipment. An electrical device according to an embodiment of the invention comprises a motor according to the above-described embodiment of the invention. Therefore, the electrical equipment provided by the embodiment of the invention has the advantages of high efficiency and the like.
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 invention 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 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 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 expressly stated 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 formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. 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 being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
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 (12)
1. A stator punching sheet is characterized by comprising:
a stator yoke;
a plurality of first stator teeth, each of the first stator teeth comprising a first tooth body and a first tooth crown, the first tooth crown being connected to the first tooth body, the first tooth body being connected to the stator yoke; and
a plurality of second stator teeth, each of the second stator teeth including a second tooth body connected to the second tooth body and a second tooth crown connected to the stator yoke, the plurality of first stator teeth and the plurality of second stator teeth being alternately arranged in a circumferential direction of the stator yoke, wherein a shape of the first tooth crown of at least one of the first stator teeth is different from a shape of the second tooth crown of at least one of the second stator teeth and/or a size of the first tooth crown of at least one of the first stator teeth is different from a size of the second tooth crown of at least one of the second stator teeth.
2. The stator lamination as recited in claim 1, wherein the first crowns of the first stator teeth are identical to each other in shape and size, and the second crowns of the second stator teeth are identical to each other in shape and size.
3. The stator lamination as recited in claim 2, wherein the first crowns include first and second pole pieces and the second crowns include third and fourth pole pieces, wherein the first pole piece of each first stator tooth has a shape that is different from a shape of the second pole piece of the respective first stator tooth and/or a size that is different from a size of the second pole piece of the respective first stator tooth.
4. The stator lamination as recited in claim 3, wherein at least a portion of the first pole piece of each first stator tooth has a width that is less than a width of the second pole piece of the respective first stator tooth.
5. The stator lamination as recited in claim 4, wherein each of the first pole shoes has first and second opposing rims radially of the stator yoke, the first rim being adjacent the stator yoke radially opposite the second rim of the stator yoke, each of the first rims being notched.
6. The stator lamination as recited in claim 3, wherein a length of the first pole piece of each first stator tooth is less than a length of the second pole piece of the respective first stator tooth.
7. The stator lamination as recited in any one of claims 3-6, wherein the plurality of second pole pieces, the plurality of third pole pieces, and the plurality of fourth pole pieces are identical to one another in shape and size.
8. The stator lamination as recited in any one of claims 3-6, wherein each of the plurality of first pole shoes, the plurality of second pole shoes, the plurality of third pole shoes, and the plurality of fourth pole shoes has opposing first and second rims radially of the stator yoke, the first rim being adjacent the stator yoke radially opposite the second rim of the stator yoke, wherein the second rims of each of the plurality of first, second, third, and fourth pole shoes lie on a same circumference.
9. A stator, characterized by comprising a plurality of stator laminations, each stator lamination being according to any one of claims 1-8.
10. An electric machine, comprising:
a rotor; and
a stator according to claim 9.
11. The electric machine of claim 10, wherein a non-uniform air gap is formed between the rotor and a first crown of the stator and a uniform air gap is formed between the rotor and a second crown of the stator.
12. Electrical apparatus, characterized in that it comprises an electrical machine according to claim 10 or 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010404312.4A CN113675963A (en) | 2020-05-13 | 2020-05-13 | Stator punching sheet, stator with same, motor and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010404312.4A CN113675963A (en) | 2020-05-13 | 2020-05-13 | Stator punching sheet, stator with same, motor and electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113675963A true CN113675963A (en) | 2021-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010404312.4A Pending CN113675963A (en) | 2020-05-13 | 2020-05-13 | Stator punching sheet, stator with same, motor and electrical equipment |
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| Country | Link |
|---|---|
| CN (1) | CN113675963A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114374286A (en) * | 2022-01-12 | 2022-04-19 | 许少青 | Brushless DC motor rotor and stator structure |
-
2020
- 2020-05-13 CN CN202010404312.4A patent/CN113675963A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114374286A (en) * | 2022-01-12 | 2022-04-19 | 许少青 | Brushless DC motor rotor and stator structure |
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