Odd layer equal pitch balanced winding of flat wire motor and flat wire motor

Abstract

The utility model belongs to motor technical field discloses an odd layer equal -pitch balanced winding of flat wire motor and flat wire motor. The winding includes: a plurality of stator slot and each flat wire conductor based on the stator slot deployment, stipulate: every pole every phase slot number is 2 or integer times of 2, corresponding pole number is 4 or integer times of 4, and the branch number of every phase is 2 or integer times of 2, and the layer number of flat wire conductor in any stator slot is b, wherein b is odd, define: the flat wire conductor close to the innermost side of every stator slot is the 1st layer conductor, at one end of each stator slot, the Nth layer flat wire conductor in every stator slot is arranged at the layer or layer flat wire conductor of another stator slot according to equal -pitch, and every phase every branch is formed by three minimum units. The utility model has the technical advantage of winding balance, high power density simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and specifically to an odd-layer full-pitch balanced winding for a flat wire motor and the flat wire motor itself. Background Technology

[0002] Flat wire motors can simultaneously meet the technical requirements of equipment miniaturization and high power density, and have been widely used in the field of new energy vehicles. They also have considerable application prospects in new energy equipment and automated production lines.

[0003] Flat-wire motors with the following winding configuration limitations are a common type of motor: the number of slots per pole per phase is 2 or an integer multiple of 2; the number of poles is 4 or an integer multiple of 4; the number of conductors per slot is odd; and the number of branches per phase is 2 or a multiple of 2. However, in existing technologies, when winding the motors under these limitations, it is impossible to guarantee a balanced arrangement of the windings in each phase across all poles. This leads to abnormal temperature rise and other issues during actual motor applications, affecting normal operation. Although some existing technologies have improved the balance of the windings, there is still a certain loss in power density. Summary of the Invention

[0004] The purpose of this utility model is to provide an odd-layer full-pitch balanced winding for a flat wire motor and a flat wire motor, so as to solve the technical problem that the corresponding windings in the prior art cannot solve the problem of balancing the balanced layout of the windings in each phase and the power density requirements when the number of slots per pole per phase is 2 or an integer multiple of 2, the number of poles is 4 or an integer multiple of 4, the number of conductors per slot is odd, and the number of branches per phase is 2 or a multiple of 2.

[0005] To achieve the above objectives, the present invention proposes the following technical solution:

[0006] In a first aspect, an odd-layer full-pitch balanced winding for a flat wire motor is provided, comprising: a plurality of stator slots, and flat wire conductors deployed based on the stator slots; wherein: the number of slots per pole per phase is 2 or an integer multiple of 2, the corresponding number of poles is 4 or an integer multiple of 4, and the number of branches per phase is 2 or an integer multiple of 2; and the number of layers of flat wire conductors in any stator slot is b; wherein b is an odd number; and the flat wire conductor closest to the innermost side of each stator slot is defined as the first layer conductor. At one end of each stator slot, the Nth layer of flat wire conductors in each stator slot are straddled at a full pitch in the other stator slot. Layer or At the flat conductor layer; Each phase and each branch consists of three minimum units; among them... The path of the first minimum unit is: Zi(b) → Zi-m+1(b) → Zi+1( →Zi-m+1( )→Zi+1( →Zi-m+1( )→Zi+1(1)→Zi-m+1(1)→Zi-2m+1( →Zi-m+1( )→Zi-2m+1( →Zi-m+1( )→Zi-2m+1( →Zi-m+1( ); The path of the second smallest unit is: Zi(b) → Zi-m-1(b) → Zi-1( )→Zi-m-1( )→Zi-1( )→Zi-m-1( )→Zi-1(1)→Zi-m-1(1)→Zi-2m-1( )→Zi-m-1( )→Zi-2m-1( )→Zi-m-1( )→Zi-2m-1( )→Zi-m-1( ); The path of the third smallest unit is: Zi(b) → Zi-m(b) → Zi( )→Zi-m( )→Zi( )→Zi-m( )→Zi(1)→Zi-m(1)→Zi-2m( )→Zi-m( )→Zi-2m( )→Zi-m( )→Zi-2m( )→Zi-m( ); Where Z represents stator slot, i is any number, and m represents the pitch.

[0007] Furthermore, the flat conductor is a continuously wound conductor.

[0008] Furthermore, At the other end of each stator slot, when N is 1, the first layer of flat wire conductors in the i-th stator slot is laid across the first layer of flat wire conductors in the other stator slot at a full pitch; when N is b, the b-th layer of flat wire conductors in the i-th stator slot is laid across the b-th layer of flat wire conductors in the other stator slot at a short pitch; when N is any other layer, the N-th layer of flat wire conductors in the i-th stator slot is laid across the b-th layer of flat wire conductors in the other stator slot at a long pitch. layer or first At the flat conductor layer.

[0009] Furthermore, the short distance is 5, the long distance is 7, and the full distance is 6.

[0010] Furthermore, the flat conductor is a hairpin-type flat conductor, one end of each stator slot is a hairpin end, and the other end of each stator slot is a welding end.

[0011] Furthermore, the lead-out lines of each phase are located at the outermost or innermost conductor of the corresponding stator slot.

[0012] Secondly, a flat wire motor is provided, including the aforementioned winding.

[0013] Beneficial effects: This technical solution provides an odd-layer full-pitch balanced winding for a flat wire motor to address the technical deficiency that existing flat wire motor windings have a difficulty in achieving balanced deployment when the number of slots per pole per phase is 2 or an integer multiple of 2, the corresponding number of poles is 4 or an integer multiple of 4, and the number of branches per phase is 2 or an integer multiple of 2.

[0014] This technical solution specifies that the number of flat wire conductor layers in any stator slot is always an odd number. Specifically, the winding structure described in this technical solution is as follows: when viewed from the end, at one end of each stator slot, the Nth layer of flat wire conductor in each stator slot is spanned across the Nth layer of another stator slot at a full pitch. Layer or At the flat conductor layer. For the given winding path, each phase and branch consists of three minimum units, the specific winding path of each minimum unit is shown above. At this point, the position of each phase and branch of the motor winding, the number of stator slots, and the number of conductor layers in each stator slot are all evenly distributed, achieving a balanced deployment of the entire winding and avoiding abnormal heat generation. Simultaneously, the full-pitch winding structure also meets the requirements for ultimate torque density, ensuring power density in subsequent applications.

[0015] It should be understood that all combinations of the foregoing concepts and the additional concepts described in more detail below can be considered as part of the utility model subject matter of this disclosure, provided that such concepts do not contradict each other.

[0016] The foregoing and other aspects, embodiments, and features of the present invention will be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as features and / or beneficial effects of exemplary embodiments, will become apparent from the following description or may be learned through practice of specific embodiments according to the teachings of the present invention. Attached Figure Description

[0017] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in the various figures may be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the odd-numbered layer full-pitch balanced winding of the flat wire motor described in this embodiment; Figure 2 This is a schematic diagram showing the arrangement of flat wire conductors in the stator slots. Figure 3 This is a schematic diagram of the U-phase winding inside the 72-slot, 12-pole, 7-layer, 2-branch flat wire motor of this embodiment. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art to which this utility model pertains.

[0019] The terms "first," "second," and similar words used in this utility model patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular forms of "an," "a," or "the," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. Terms such as "comprising" or "including" indicate that the element or object preceding "comprising" encompasses the features, integrals, steps, operations, elements, and / or components listed following "comprising" or "including," and do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] A flat-wire motor with 2 slots per pole per phase, 4 poles or multiples of 4, an odd number of conductors per slot, and 2 branches per phase or multiples of 2 is a commonly used type of flat-wire motor. However, existing winding configurations for this type of motor struggle to balance balanced deployment and power density, leading to technical problems in practical applications such as abnormal temperature rise due to circulating current or power density reduction due to difficulty in achieving the ultimate torque density. Therefore, this embodiment aims to provide an odd-layer full-pitch balanced winding for a flat-wire motor and a flat-wire motor to solve the aforementioned technical problems.

[0021] The odd-numbered layer full-pitch balanced winding of the flat wire motor disclosed in this utility model will be further described in detail below with reference to the embodiments shown in the accompanying drawings.

[0022] Combination Figures 1-3 As shown, the winding includes a plurality of stator slots deployed on the stator core 1, and flat wire conductors 2 deployed based on the stator slots. For ease of description, this embodiment is limited as follows: in the winding, the number of slots per pole per phase is 2 or an integer multiple of 2, the corresponding number of poles is 4 or an integer multiple of 4, and the number of branches per phase is 2 or an integer multiple of 2; and the number of layers of flat wire conductors in any stator slot is b; where b is an odd number. Simultaneously, the flat wire conductor closest to the innermost side of each stator slot is the first layer conductor, and based on this, the layers of conductors are sequentially: the second layer conductor, the third layer conductor… the Nth layer conductor… the bth layer conductor. Furthermore, Z represents the stator slot. For example, Zi represents the i-th stator slot, where i is any number, and Zi-m+1 represents the (i-m+1)-th stator slot; where m is an integer pitch.

[0023] In the winding arrangement of the winding, at one end of each stator slot, the Nth layer of flat wire conductor in each stator slot is spanned across the Nth layer of another stator slot at a full pitch. Layer or At the flat conductor layer.

[0024] In the specific bypass path, each phase and each branch is composed of three minimum units.

[0025] The path of the first type of minimum unit is: Zi(b) → Zi-m+1(b) → Zi+1( →Zi-m+1( )→Zi+1( →Zi-m+1( )→Zi+1(1)→Zi-m+1(1)→Zi-2m+1( →Zi-m+1( )→Zi-2m+1( →Zi-m+1( )→Zi-2m+1( →Zi-m+1( ).

[0026] Specifically, the connection path of the first minimum unit is: Z13(7)→Z8(7)→Z14(3)→Z8(6)→Z14(2)→Z8(5)→Z14(1)→Z8(1)→Z2(4)→Z8(2)→Z2(5)→Z8(3)→Z2(6)→Z8(4).

[0027] The path of the second smallest unit is: Zi(b) → Zi-m-1(b) → Zi-1( )→Zi-m-1( )→Zi-1( )→Zi-m-1( )→Zi-1(1)→Zi-m-1(1)→Zi-2m-1( )→Zi-m-1( )→Zi-2m-1( )→Zi-m-1( )→Zi-2m-1( )→Zi-m-1( ).

[0028] Specifically, one possible connection path for the second type of minimum unit is: Z14(7)→Z7(7)→Z13(3)→Z7(6)→Z13(2)→Z7(5)→Z13(1)→Z7(1)→Z1(4)→Z7(2)→Z1(5)→Z7(3)→Z1(6)→Z7(4).

[0029] The path of the third smallest unit is: Zi(b) → Zi-m(b) → Zi( )→Zi-m( )→Zi( )→Zi-m( )→Zi(1)→Zi-m(1)→Zi-2m( )→Zi-m( )→Zi-2m( )→Zi-m( )→Zi-2m( )→Zi-m( ).

[0030] Specifically, one possible connection path for the third type of minimum unit is: Z13(7)→Z7(7)→Z13(3)→Z7(6)→Z13(2)→Z7(5)→Z13(1)→Z7(1)→Z1(4)→Z7(2)→Z1(5)→Z7(3)→Z1(6)→Z7(4).

[0031] Correspondingly, based on the above path setting and the span setting at one end, the spanning structure at the other end is as follows: At the other end of each stator slot, when N is 1, the first layer of flat wire conductor in the i-th stator slot is spanned at a full distance across the first layer of flat wire conductor in the other stator slot; when N is b, the b-th layer of flat wire conductor in the i-th stator slot is spanned at a short distance across the b-th layer of flat wire conductor in the other stator slot; when N is any other layer, the N-th layer of flat wire conductor in the i-th stator slot is spanned at a long distance across the first layer of flat wire conductor in the other stator slot. layer or first At the flat conductor layer.

[0032] In this embodiment, the flat wire conductor can be a continuously wound conductor or a hairpin-type flat wire conductor. When the flat wire conductor is a hairpin-type flat wire conductor, one end of each stator slot is a hairpin end, and the other end of each stator slot is a welding end.

[0033] As a specific implementation, when the whole distance is 6, the corresponding short distance is 5 and the long distance is 7.

[0034] For ease of understanding, this embodiment continues to use the full-pitch winding of a 72-slot, 12-pole, 7-layer, 2-branch flat wire motor as an example. The winding is divided into a U-phase winding, a V-phase winding, and a W-phase winding. Each of the U-phase, V-phase, and W-phase windings consists of two branches: a first branch and a second branch. Each branch comprises one first-type minimum unit, one second-type minimum unit, and four third-type minimum units. Further, taking the U-phase branch as an example, the two branches are U1 and U2.

[0035] Specifically, the winding path of branch U1 is: Z7(7)→Z13(3)→Z7(6)→Z13(2)→Z7(5)→Z13(1)→Z7(1)→Z1(4)→Z7(2)→Z1(5)→Z7(3)→Z1(6)→Z7(4)→Z1(7)→Z67(7)→Z1(3)→Z67(6)→Z1(2)→Z67(5)→Z1(1)→Z67(1) →Z61(4)→Z67(2)→Z61(5)→Z67(3)→Z61(6)→Z67(4)→Z61(7)→Z55(7)→Z61(3)→Z55(6)→Z61(2)→Z55(5)→Z61(1)→Z55(1)→Z49(4)→Z55(2)→Z49(5)→Z55(3)→Z49(6)→Z55(4)→Z49(7) →Z44(7)→Z50(3)→Z44(6)→Z50(2)→Z44(5)→Z50(1)→Z44(1)→Z38(4)→Z44(2)→Z38(5)→Z44(3)→Z38(6)→Z44(4)→Z38(7)→Z32(7)→Z38(3)→Z32(6)→Z38(2)→Z32(5)→Z38(1)→Z32(1) →Z26(4)→Z32(2)→Z26(5)→Z32(3)→Z26(6)→Z32(4)→Z26(7)→Z20(7)→Z26(3)→Z20(6)→Z26(2)→Z20(5)→Z26(1)→Z20(1)→Z14(4)→Z20(2)→Z14(5)→Z20(3)→Z14(6)→Z20(4)→Z14(7).

[0036] The winding path of branch U2 is: Z8(7)→Z14(3)→Z8(6)→Z14(2)→Z8(5)→Z14(1)→Z8(1)→Z2(4)→Z8(2)→Z2(5)→Z8(3)→Z2(6)→Z8(4)→Z2(7)→Z68(7)→Z2(3)→Z68(6)→Z2(2)→Z68(5)→Z2(1)→Z68(1)→Z6 2(4)→Z68(2)→Z62(5)→Z68(3)→Z62(6)→Z68(4)→Z62(7)→Z56(7)→Z62(3)→Z56(6)→Z62(2)→Z56(5)→Z62(1)→Z56(1)→Z50(4)→Z56(2)→Z50(5)→Z56(3)→Z50(6)→Z56(4)→Z50(7)→Z 43(7)→Z49(3)→Z43(6)→Z49(2)→Z43(5)→Z49(1)→Z43(1)→Z37(4)→Z43(2)→Z37(5)→Z43(3)→Z37(6)→Z43(4)→Z37(7)→Z31(7)→Z37(3)→Z31(6)→Z37(2)→Z31(5)→Z37(1)→Z31(1)→ Z25(4)→Z31(2)→Z25(5)→Z31(3)→Z25(6)→Z31(4)→Z25(7)→Z19(7)→Z25(3)→Z19(6)→Z25 (2)→Z19(5)→Z25(1)→Z19(1)→Z13(4)→Z19(2)→Z13(5)→Z19(3)→Z13(6)→Z19(4)→Z13(7).

[0037] Specifically, each branch has lead-out lines at both ends. In actual setup, for ease of routing, the lead-out lines of each branch are located at the innermost or outermost conductor of the corresponding stator slot.

[0038] Therefore, each branch in the U-phase winding is composed of three minimum units, achieving complete balance. Similarly, the V-phase and W-phase windings are also symmetrically and evenly distributed on the stator based on the above winding configuration. This achieves a balanced deployment of each phase and branch on the windings, avoiding circulating currents and the resulting abnormal temperature rise. Furthermore, the use of full-pitch spacing between the stator slot conductors achieves the ultimate torque density, meeting the motor's power requirements.

[0039] This embodiment also provides a flat wire motor, which includes the aforementioned winding, and therefore has the technical advantages of high motor power and stable operation in practical applications.

[0040] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. An odd-layer full-pitch balanced winding for a flat wire motor, characterized in that, include: A plurality of stator slots, and flat wire conductors deployed based on the stator slots; The rules are as follows: the number of slots per pole per phase is 2 or an integer multiple of 2, the corresponding number of poles is 4 or an integer multiple of 4, and the number of branches per phase is 2 or an integer multiple of 2; and the number of layers of flat wire conductors in any stator slot is b; where b is an odd number; the definition is: the flat wire conductor closest to the innermost side of each stator slot is the first layer conductor. At one end of each stator slot, the Nth layer of flat wire conductors in each stator slot are straddled at a full pitch in the other stator slot. Layer or At the flat conductor layer; Each phase and each branch consists of three minimum units; among them... The path of the first minimum unit is: Zi(b) → Zi-m+1(b) → Zi+1( →Zi-m+1( )→Zi+1( →Zi-m+1( )→Zi+1(1)→Zi-m+1(1)→Zi-2m+1( →Zi-m+1( )→Zi-2m+1( →Zi-m+1( )→Zi-2m+1( →Zi-m+1( ); The path of the second smallest unit is: Zi(b) → Zi-m-1(b) → Zi-1( )→Zi-m-1( )→Zi-1( )→Zi-m-1( )→Zi-1(1)→Zi-m-1(1)→Zi-2m-1( )→Zi-m-1( )→Zi-2m-1( )→Zi-m-1( )→Zi-2m-1( )→Zi-m-1( ); The path of the third smallest unit is: Zi(b) → Zi-m(b) → Zi( )→Zi-m( )→Zi( )→Zi-m( )→Zi(1)→Zi-m(1)→Zi-2m( )→Zi-m( )→Zi-2m( )→Zi-m( )→Zi-2m( )→Zi-m( ); Where Z represents stator slot, i is any number, and m represents the pitch.

2. The odd-numbered layer full-pitch balanced winding of the flat wire motor according to claim 1, characterized in that, The flat conductor is a continuously wound conductor.

3. The odd-numbered layer full-pitch balanced winding of the flat wire motor according to claim 1, characterized in that, At the other end of each stator slot, when N is 1, the first layer of flat wire conductors in the i-th stator slot is laid across the first layer of flat wire conductors in the other stator slot at a full pitch; when N is b, the b-th layer of flat wire conductors in the i-th stator slot is laid across the b-th layer of flat wire conductors in the other stator slot at a short pitch; when N is any other layer, the N-th layer of flat wire conductors in the i-th stator slot is laid across the b-th layer of flat wire conductors in the other stator slot at a long pitch. layer or first At the flat conductor layer.

4. The odd-numbered layer full-pitch balanced winding of the flat wire motor according to claim 3, characterized in that, The short distance is 5, the long distance is 7, and the full distance is 6.

5. The odd-numbered layer full-pitch balanced winding of the flat wire motor according to claim 3, characterized in that, The flat conductor is a hairpin-type flat conductor, one end of each stator slot is a hairpin end, and the other end of each stator slot is a welding end.

6. The odd-numbered layer full-pitch balanced winding of the flat wire motor according to claim 1, characterized in that, Each phase lead is located at the outermost or innermost conductor of the corresponding stator slot.

7. A flat wire motor, characterized in that, Includes the winding as described in any one of claims 1-6.

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