A method of winding a motor winding, a stator and a motor
Patent Information
- Application Number
- CN202210923680.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-08-02
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2042-08-02
AI Technical Summary
但是，对于扁线发卡电机而言，同相的支路之间排布不均衡容易出现电势不一致，导致支路之间形成环流，影响电机的效率和温升
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Figure CN115242013B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of motor technology, and more specifically, to a method for winding motor windings, a stator, and a motor. Background Technology
[0002] In the field of electric vehicles, there are high requirements for motor efficiency and temperature rise. With the application of flat wire stator technology, electric vehicle motors are gradually adopting flat wire windings. However, for flat wire hairpin motors, uneven arrangement of the same-phase branches can easily lead to inconsistent potentials, causing circulating currents between branches, which affects the motor's efficiency and temperature rise.
[0003] Meanwhile, the industry commonly uses even-numbered layers (2, 4, 6, or 8 layers) for flat wire hairpin winding schemes. Odd-numbered layers present challenges such as complex and varied arrangements and greater difficulty in achieving branch symmetry, resulting in very few motors on the market currently using this method. Furthermore, the industry offers various single-layer flat wire winding schemes with limited arrangement options. Additionally, the conductors of each parallel branch are distributed in different positions within the stator slots, causing non-perfect branch symmetry. This leads to differences in back EMF, resistance, and inductance, resulting in circulating currents, increased additional losses, reduced efficiency, and localized overheating of the motor windings, thus affecting the motor's lifespan. Furthermore, the winding arrangement and connection method in odd-layer hairpin motors is one of the design challenges of this type of motor. The existing technology mainly has the following problems: 1) Odd-layer hairpin winding schemes have a large number of coil types and complex arrangement methods; many busbars and busbars are required to connect the branches and center points of each phase winding, resulting in an increase in the height of the winding ends and a decrease in motor efficiency; 2) In order to balance the potential of each branch in the winding, odd-layer windings use more irregular coils. The presence of irregular coils will increase the difficulty of coil manufacturing and is not conducive to mass production; 3) Odd-layer windings have the problem of winding branch asymmetry, resulting in differences in back EMF, resistance, inductance, etc., which leads to a decrease in motor performance, winding circulating current, increased additional losses in the motor, and easy to cause local overheating of the motor. Summary of the Invention
[0004] The purpose of this application is to provide a method for winding motor windings, a stator, and a motor that does not require multiple busbars and busbars to connect the branches and center points of each phase winding, avoids increasing the height of the winding ends, does not require the use of many irregularly shaped coils, reduces manufacturing difficulty, facilitates mass production, ensures symmetrical winding branches, reduces additional losses in the motor, avoids local overheating of the motor, and avoids performance degradation of the motor.
[0005] In a first aspect, embodiments of this application provide a method for winding a motor winding, the motor comprising: a multi-phase winding; each phase of the winding comprising: a first branch; the motor comprising: multiple layers of iron core slots; the total number of iron core slots being an odd number;
[0006] The method includes:
[0007] Step 1: According to the pole pitch, alternately wind the first branch into all the core slots of the Nth core slot layer and all the core slots of the N+1th core slot layer of the motor;
[0008] Step 2: Repeat Step 1 until the first branch is wound around all even-numbered core slot layers of the motor;
[0009] Step 3: Wind the first branch into the starting slot of the motor where the odd number of winding layers are not yet formed;
[0010] Step 4: According to the pole pitch, wind the first branch into the next core slot where no odd number of layers have been wound;
[0011] Step 5: According to the first span, wind the first branch into the next iron core slot of the unwound odd-numbered layers. The first span is the sum of the pole pitch and a preset value, where the preset value is a positive integer or a negative integer.
[0012] Step Six: Repeat Steps Four and Five until the first branch is wound around all the iron core slots of the motor.
[0013] In the above implementation process, the first branch is first alternately wound on the Nth and N+1th layers until the first branch is wound on all even-numbered core slot layers. Finally, according to the first span and pole pitch, the first branch is wound on the odd-numbered core slots where the winding has not yet been wound. This eliminates the need for multiple busbars and the connection between the busbars and the branches and center points of each phase winding, avoiding an increase in winding height and end height. It also eliminates the need for irregularly shaped coils, reducing manufacturing difficulty and facilitating mass production. It ensures the proper stacking of winding branches, reduces additional losses in the motor, avoids localized overheating of the motor, and further prevents performance degradation of the motor.
[0014] Furthermore, each phase winding also includes: a second branch;
[0015] The method further includes:
[0016] Step 7: According to the pole pitch, alternately wind the second branch into all the core slots of the Nth core slot layer and all the core slots of the N+1th core slot layer of the motor;
[0017] Step 8: Repeat step 7 until the second branch is wound around all even-numbered core slot layers of the motor;
[0018] Step 9: Wind the second branch into the starting slot of the motor where the odd number of winding layers are not yet formed;
[0019] Step 10: According to the pole pitch, wind the second branch into the next core slot of the unwound odd-numbered layers;
[0020] Step 11: According to the second span, wind the second branch into the next core slot of the unwound odd-numbered layers, the second span being the sum of the pole pitch and a preset value, the preset value being a positive integer or a negative integer; and the first span and the second span are different;
[0021] Step 12: Repeat steps 10 and 11 until the second branch is wound around all the iron core slots of the motor.
[0022] In the above implementation process, a two-branch winding scheme is proposed. Based on this method, two-branch winding can be performed according to different high-power requirements. It eliminates the need for multiple busbars and the connection between the busbars and the branches and center points of each phase winding, avoiding an increase in winding height and end height. It also eliminates the need for irregularly shaped coils, reducing manufacturing difficulty and facilitating mass production. It ensures the proper stacking of winding branches, reduces additional losses in the motor, avoids localized overheating of the motor, and further prevents performance degradation.
[0023] Furthermore, following step six, the following steps are also included:
[0024] Connect the end of the first branch to the core slot layer where the starting point of the first branch is located.
[0025] Furthermore, following step twelfth, the following is also included:
[0026] The end of the second branch is connected to the core slot layer where the starting point of the first branch is located.
[0027] Furthermore, the starting and ending points of the first and second branches are located at the innermost layer of the bottom of the iron core slot or the outermost layer of the slot opening.
[0028] Furthermore, the starting end of the first branch and the starting end of the first branch are located in adjacent iron core slots;
[0029] The starting end of the second branch and the starting end of the second branch are located in adjacent iron core slots.
[0030] Furthermore, the lead wires of each layer of the winding are at the crown end.
[0031] In the above implementation process, it is important to keep the motor output cable convenient to facilitate mass production of the motor.
[0032] Secondly, embodiments of this application provide a stator, including: a stator core and windings; the windings include: multi-phase windings; each phase of the windings includes: a first branch; the stator core includes: multiple core slot layers; the number of core slot layers of the stator core is odd.
[0033] The first branch is alternately wound on all core slots of the Nth core slot layer and all core slots of the N+1th core slot layer of the stator core, wherein N is any even number less than the number of core slot layers of the stator core, or N+1 is any even number less than the number of core slot layers of the stator core.
[0034] When N is any odd number less than the number of core slot layers of the stator core, the first branch is wound in the last odd number of core slot layers of the stator core according to the pole pitch and the first span.
[0035] When N+1 is any odd number less than the number of core slot layers of the stator core, the first branch is wound in the last first core slot layer of the stator core according to the pole pitch and the first span.
[0036] The first span is the sum of the extreme distance and a preset value, where the preset value is a positive or negative integer.
[0037] Furthermore, each phase winding also includes: a second branch;
[0038] The second branch is alternately wound on all core slots of the Nth core slot layer and all core slots of the N+1th core slot layer of the stator core, wherein N is any even number less than the number of core slot layers of the stator core, or N+1 is any even number less than the number of core slot layers of the stator core.
[0039] When N is any odd number less than the number of core slot layers of the stator core, the second branch is wound in the last first core slot layer of the stator core according to the pole pitch and the second span.
[0040] When N+1 is any odd number less than the number of core slot layers of the stator core, the second branch is wound in the first core slot layer of the stator core according to the pole pitch and the second span.
[0041] The second span is the sum of the extreme distance and a preset value, where the preset value is a positive or negative integer.
[0042] Thirdly, embodiments of this application provide an electric motor, including the stator described in the second aspect.
[0043] Other features and advantages disclosed in this application will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the above-described technology disclosed in this application.
[0044] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0045] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0046] Figure 1 A schematic flowchart illustrating the method for winding motor windings provided in this application embodiment;
[0047] Figure 2 A circuit diagram of the first branch provided in an embodiment of this application;
[0048] Figure 3(a) is a partial winding diagram of the three-phase motor winding provided in the embodiment of this application;
[0049] Figure 3(b) is a partial winding diagram of the three-phase motor winding provided in the embodiment of this application.
[0050] Figure 3(c) is a partial winding diagram of the three-phase motor winding provided in the embodiment of this application.
[0051] Figure 3(d) is a partial winding diagram of the three-phase motor winding provided in the embodiment of this application.
[0052] Figure 4(a) is a partial winding diagram of the single-phase motor winding provided in the embodiment of this application.
[0053] Figure 4(b) is a partial winding diagram of the single-phase motor winding provided in the embodiment of this application.
[0054] Figure 4(c) is a partial winding diagram of the single-phase motor winding provided in the embodiment of this application.
[0055] Figure 4(d) is a partial winding diagram of the single-phase motor winding provided in the embodiment of this application.
[0056] Figure 5 Another schematic flowchart illustrating the method for winding motor windings provided in this application embodiment.
[0057] Figure 6A circuit diagram of the second branch provided in an embodiment of this application;
[0058] Figure 7 A schematic diagram of the initial type I card provided in an embodiment of this application;
[0059] Figure 8 A schematic diagram of the odd-numbered layers of jumper clips for the winding of a motor provided in an embodiment of this application;
[0060] Figure 9 A schematic diagram of the y+1 and y-1 pitch hairpin coils provided in the embodiments of this application;
[0061] Figure 10 This is a schematic diagram of the overall winding of the motor provided in an embodiment of this application. Detailed Implementation
[0062] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.
[0063] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0064] As is well known, the core of a new energy vehicle's drive system is the drive motor. To improve vehicle power and economy within a limited volume, drive motors are constantly evolving towards higher power density and higher efficiency. Traditional round enameled wire windings often suffer from low effective copper area and high copper loss. To increase the effective copper area, the copper wire arrangement within the slots needs to be more regular, increasing the slot fill factor. Therefore, the hairpin winding method has been applied. In simpler terms—by improving the winding shape and arrangement, compared to the somewhat messy enameled wire windings, hairpin windings can fit more wires into the same volume. This increases the motor's efficiency and power density. Hairpin winding design motors refer to a technology that uses flat copper hairpin wire instead of traditional thin round wire in the stator windings of the drive motor. Because the stator winding coil shape resembles a hairpin, hairpin motors are also commonly known as hairpin motors or flat wire motors. The method provided in this application is applicable to hairpin windings.
[0065] Example 1
[0066] See Figure 1Figures 3(a), 3(b), 3(c), 3(d), 4(a), 4(b), 4(c), and 4(d) illustrate an embodiment of this application that provides a method for winding a motor winding. The motor includes a multi-phase winding; wherein the winding is a flat wire winding; each phase winding includes a first branch; the motor includes multiple layers of iron core slots; the total number of iron core slot layers is odd; the method includes:
[0067] Step 1: Based on the pole pitch, alternately wind the first branch into all the core slots of the Nth core slot layer and all the core slots of the N+1th core slot layer of the motor;
[0068] Step 2: Repeat Step 1 until the first branch is wound in all even-numbered core slots of the motor;
[0069] Step 3: Wind the first branch into the starting slot of the motor where the odd number of winding layers are not yet completed;
[0070] Step 4: Based on the pole pitch, wind the first branch into the next core slot where no odd number of layers have been wound;
[0071] Step 5: Based on the first span, wind the first branch into the next core slot where no odd-number of layers have been wound. The first span is the sum of the pole pitch and a preset value, where the preset value is a positive or negative integer.
[0072] Preferably, the preset value is 1.
[0073] Step Six: Repeat Steps Four and Five until the first branch is wound around all the iron core slots of the motor.
[0074] For example, taking a 5-layer, 48-slot motor with a pole pitch of 6 as an example, the starting slot is slot 4, and the ending slot is slot 47. See [link to relevant documentation]. Figure 2 For the winding method of the first branch of a single phase, see [link to relevant documentation]. Figure 5 Use I-shaped hairpins at both ends, and wind the flat copper wire around one turn from N. 4,1 Connect to hair clip N via twist welding. 10,2 (The tenth groove of the second circumferential groove layer) ~ N 16,1 Then, it is connected to the hairpin N by twist welding. 22,2 ~N 28,1 Then, it is connected to the hairpin N by twist welding. 34,2 ~N 40,1 After winding N layers for one turn, jumper wire is moved to layer N+1, while maintaining the y-pitch. The wire is then soldered to the hairpin N using a twist head. 46,2 ~N 1,3 Finally, jump from the first and second levels to the third and fourth levels, from N 4,3 Connect to hair clip N via twist welding. 10,4 ~N 16,3 ...continue jumping through the entire even-numbered level. See also... Figure 6 In the final odd-numbered jumper, one branch maintains a pitch of y (y=6) and a pitch of y+1, such as the final jumper from N. 4,5 Connect to hair clip N via twist welding. 10,5 ~N 16,5 Then connect the y+1 pitch coil, such as by twisting the connection and soldering it to the hairpin N. 22,5 ~N 29,5 Then connect the Y-pitch coil, such as by twisting the connector and soldering it to the hairpin N. 35,5 ~N 41,5 Finally, the wires are routed in reverse, from the last layer of hairpins back to the first layer... and finally from N... 47,1 The line is exited via a type I hairpin.
[0075] In the above implementation process, the first branch is first alternately wound on the Nth and N+1th layers until the first branch is wound on all even-numbered core slot layers. Finally, according to the first span and pole pitch, the first branch is wound on the odd-numbered core slots where the winding has not yet been wound. This eliminates the need for multiple busbars and the connection between the busbars and the branches and center points of each phase winding, avoiding an increase in winding height and end height. It also eliminates the need for irregularly shaped coils, reducing manufacturing difficulty and facilitating mass production. It ensures the proper stacking of winding branches, reduces additional losses in the motor, avoids localized overheating of the motor, and further prevents performance degradation of the motor.
[0076] Furthermore, following step six, the following is also included:
[0077] Connect the end of the first branch to the core slot layer where the starting point of the first branch is located.
[0078] See Figure 5 Based on this, embodiments of this application provide a method for winding a two-branch system, wherein each phase winding further includes a second branch; the method further includes:
[0079] Step 7: According to the pole pitch, alternately wind the second branch into all the core slots of the Nth core slot layer and all the core slots of the N+1th core slot layer of the motor;
[0080] Step 8: Repeat step 7 until the second branch is wound in all even-numbered core slots of the motor;
[0081] Step 9: Wind the second branch into the starting slot of the motor where the odd number of winding layers are not yet complete;
[0082] Step 10: Based on the pole pitch, wind the second branch into the next core slot where no odd number of layers have been wound;
[0083] Step 11: Based on the second span, wind the second branch into the next core slot where no odd number of layers have been wound. The second span is the sum of the pole pitch and a preset value, which is either a positive or negative integer. Furthermore, the first span and the second span are different.
[0084] Step 12: Repeat steps 10 and 11 until the second branch is wound around all the iron core slots of the motor.
[0085] For example, see Figure 6 The second branch is wound in the same way as the first branch in steps seven and eight. In the final odd-numbered layer flat winding, the second span is different from the first span. For example, if the first span is y+1, then the second span is y-1; if the first span is y-1, then the second span is y+1. (See also...) Figure 9 , which are the y+1 and y-1 pitch hairpin coils.
[0086] In the above implementation process, a two-branch winding scheme is proposed. Based on this method, two-branch winding can be performed according to different high-power requirements, eliminating the need for multiple busbars and the connection between the busbars and the branches and center points of each phase winding. This avoids increasing the height of the windings and the height of the winding ends, and also eliminates the need for irregularly shaped coils, reducing manufacturing difficulty and facilitating mass production. It ensures the proper stacking of winding branches, reduces additional losses in the motor, avoids localized overheating of the motor, and further prevents performance degradation of the motor.
[0087] Furthermore, after step twelve, the following are also included:
[0088] The end of the second branch is connected to the core slot layer where the starting point of the first branch is located.
[0089] Furthermore, the starting and ending points of the first and second branches are located at the innermost layer of the bottom of the iron core slot or the outermost layer of the slot opening.
[0090] Furthermore, the starting end of the first branch and the starting end of the first branch are located in adjacent iron core slots;
[0091] The starting point of the second branch is located in an adjacent iron core slot.
[0092] Further, see Figure 10 The lead-out wires of each layer of winding are 3 at the crown end 1.
[0093] Furthermore, after each branch of the motor is welded, the final input and output lines are concentrated together, making the busbar design relatively simple.
[0094] Specifically, the outgoing lines refer to the three-phase outgoing lines of the motor. Each branch line is connected in one location, which is beneficial for connecting each phase of the motor in series and parallel.
[0095] Example 2
[0096] This application embodiment also provides a stator, including: a stator core, and windings; the windings include: multi-phase windings; each phase winding includes: a first branch; the stator core includes: multiple core slot layers; the number of core slot layers of the stator core is odd.
[0097] The first branch is alternately wound on all core slots of the Nth core slot layer and all core slots of the N+1th core slot layer of the stator core, wherein N is any even number less than the number of core slot layers of the stator core, or N+1 is any even number less than the number of core slot layers of the stator core.
[0098] When N is any odd number less than the number of core slot layers of the stator core, the first branch is wound in the last odd number of core slot layers of the stator core according to the pole pitch and the first span.
[0099] When N+1 is any odd number less than the number of core slot layers of the stator core, the first branch is wound in the last first core slot layer of the stator core according to the pole pitch and the first span.
[0100] The first span is the sum of the extreme distance and a preset value, where the preset value is a positive or negative integer.
[0101] Furthermore, each phase winding includes: a second branch;
[0102] The second branch is alternately wound on all core slots of the Nth core slot layer and all core slots of the N+1th core slot layer of the stator core, wherein N is any even number less than the number of core slot layers of the stator core, or N+1 is any even number less than the number of core slot layers of the stator core.
[0103] When N is any odd number less than the number of core slot layers of the stator core, the second branch is wound in the last first core slot layer of the stator core according to the pole pitch and the second span.
[0104] When N+1 is any odd number less than the number of core slot layers of the stator core, the second branch is wound in the first core slot layer of the stator core according to the pole pitch and the second span.
[0105] The second span is the sum of the extreme distance and a preset value, where the preset value is a positive or negative integer.
[0106] Furthermore, referring to Figure 3, all solder joints on the motor at the crown end are completely identical, with no irregular welds. The motor cable busbar is located at the crown end, ensuring convenient cable exit. In Figure 3, 1 represents the crown end, and 2 represents the crown end.
[0107] Furthermore, the end of the first branch is connected to the core slot layer where the starting point of the first branch is located.
[0108] Furthermore, the end of the second branch is connected to the core slot layer where the starting point of the first branch is located.
[0109] Furthermore, the starting and ending points of the first and second branches are located at the innermost layer of the bottom of the iron core slot or the outermost layer of the slot opening.
[0110] Furthermore, the starting end of the first branch and the starting end of the first branch are located in adjacent iron core slots;
[0111] The starting point of the second branch is located in an adjacent iron core slot.
[0112] Furthermore, referring to Figure 3, the lead-out wires of each winding layer are at the crown end. In Figure 3, 1 is the crown end and 2 is the flower crown end.
[0113] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0114] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
[0115] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.
Claims
1. A method for winding an electric motor winding, characterized in that, The motor includes: a multi-phase winding; each phase of the winding includes: a first branch; the motor includes: multiple layers of iron core slots; the total number of iron core slot layers is odd. The method includes: Step 1: According to the pole pitch, alternately wind the first branch into all the core slots of the Nth core slot layer and all the core slots of the N+1th core slot layer of the motor; Step 2: Repeat Step 1 until the first branch is wound around all even-numbered core slot layers of the motor; Step 3: Wind the first branch into the starting slot of the motor where the odd number of winding layers are not yet formed; Step 4: According to the pole pitch, wind the first branch into the next core slot where no odd number of layers have been wound; Step 5: According to the first span, wind the first branch into the next iron core slot of the unwound odd-numbered layers. The first span is the sum of the pole pitch and a preset value, where the preset value is a positive integer or a negative integer. Step Six: Repeat Steps Four and Five until the first branch is wound around all the iron core slots of the motor.
2. The method for winding a motor winding according to claim 1, characterized in that, Each phase winding also includes: a second branch; The method further includes: Step 7: According to the pole pitch, alternately wind the second branch into all the core slots of the Nth core slot layer and all the core slots of the N+1th core slot layer of the motor; Step 8: Repeat step 7 until the second branch is wound around all even-numbered core slot layers of the motor; Step 9: Wind the second branch into the starting slot of the motor where the odd number of winding layers are not yet formed; Step 10: According to the pole pitch, wind the second branch into the next core slot of the unwound odd-numbered layers; Step 11: According to the second span, wind the second branch into the next core slot of the unwound odd-numbered layers, the second span being the sum of the pole pitch and a preset value, the preset value being a positive integer or a negative integer; and the first span and the second span are different; Step 12: Repeat steps 10 and 11 until the second branch is wound around all the iron core slots of the motor.
3. The method for winding a motor winding according to claim 1, characterized in that, Following step six, the following is also included: Connect the end of the first branch to the core slot layer where the starting point of the first branch is located.
4. The method for winding a motor winding according to claim 2, characterized in that, Following step twelfth, the following is also included: The end of the second branch is connected to the core slot layer where the starting point of the first branch is located.
5. The method for winding a motor winding according to claim 2, characterized in that, The starting and ending points of the first and second branches are located at the innermost layer of the bottom of the iron core slot or the outermost layer of the slot opening.
6. The method for winding a motor winding according to any one of claims 1-5, characterized in that, The lead-out wires of each layer of the winding are at the crown end.
7. A kind Stator, characterized in that, include: Stator core, windings; The winding includes: a multi-phase winding; each phase of the winding includes: a first branch; the stator core includes: multiple core slot layers; the number of core slot layers of the stator core is odd. The first branch is alternately wound on all core slots of the Nth core slot layer and all core slots of the N+1th core slot layer of the stator core, wherein N is any even number less than the number of core slot layers of the stator core, or N+1 is any even number less than the number of core slot layers of the stator core. When N is any odd number less than the number of core slot layers of the stator core, the first branch is wound in the last odd number of core slot layers of the stator core according to the pole pitch and the first span. When N+1 is any odd number less than the number of core slot layers of the stator core, the first branch is wound in the last first core slot layer of the stator core according to the pole pitch and the first span. The first span is the sum of the extreme distance and a preset value, where the preset value is a positive integer or a negative integer; The end of the first branch is connected to the core slot layer where the starting point of the first branch is located.
8. The stator according to claim 7, characterized in that, Each phase winding also includes: a second branch; The second branch is alternately wound on all core slots of the Nth core slot layer and all core slots of the N+1th core slot layer of the stator core, wherein N is any even number less than the number of core slot layers of the stator core, or N+1 is any even number less than the number of core slot layers of the stator core. When N is any odd number less than the number of core slot layers of the stator core, the second branch is wound in the last first core slot layer of the stator core according to the pole pitch and the second span. When N+1 is any odd number less than the number of core slot layers of the stator core, the second branch is wound in the first core slot layer of the stator core according to the pole pitch and the second span. The second span is the sum of the extreme distance and a preset value, where the preset value is a positive or negative integer.
9. An electric motor, characterized in that, Includes the stator as described in claim 7 or 8.
Citation Information
Patent Citations
Stator and motor
CN218301027U