Stator assembly, electric machine and aircraft
By using a split stator assembly design and detachable connection of limit bars and connecting plates, the problem of difficult winding operation of traditional motor stator windings is solved, achieving efficient winding and simplified maintenance, and improving winding quality and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING QUARK ELECTRIC TECH CO LTD
- Filing Date
- 2025-07-01
- Publication Date
- 2026-06-16
Smart Images
Figure CN224367598U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of motor technology, specifically relating to a stator assembly, a motor, and an aircraft. Background Technology
[0002] In traditional motor stator winding manufacturing processes, direct coil winding on the stator yoke and stator teeth presents significant physical space constraints. Due to the rigid structure of the stator yoke and adjacent stator teeth, winding tools and conductors are severely constrained during operation. The narrow gaps between adjacent stator teeth and the radial protrusions of the stator yoke significantly compress the winding path, making it difficult to arrange the conductors along an ideal trajectory. This spatial constraint not only increases the difficulty of winding operations but also easily leads to insulation damage due to mechanical interference between the conductors and structural components, affecting the reliability and consistency of the winding. This problem is particularly pronounced when using large-section conductors or high slot fill factor designs, severely restricting winding efficiency and finished product quality. Therefore, existing technologies suffer from difficulties and low efficiency in winding operations due to the spatial constraints of the stator yoke structure. Utility Model Content
[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a stator assembly, a motor and an aircraft, which solves the problems of difficult winding operation and low efficiency caused by the space limitation of the stator yoke structure in the prior art.
[0004] The objective of this utility model can be achieved through the following technical solutions:
[0005] A stator assembly includes an annular stator yoke and coil windings;
[0006] A connecting plate is fixed on the outer peripheral wall of the stator yoke. The connecting plate extends radially along the stator yoke. There are multiple fixed plates, and the multiple connecting plates are evenly distributed in a ring around the central axis of the stator yoke.
[0007] The coil winding is formed by winding wire. The number of coil windings and connecting plates are equal and correspond one-to-one. The coil windings are sleeved on the corresponding connecting plates.
[0008] The connecting plate can be detachably connected to the limiting strip at the end away from the center axis of the stator yoke. The coil winding is located between the outer wall of the stator yoke and the limiting strip. The limiting strip is used to limit the movement of the coil winding along the radial direction of the stator yoke.
[0009] The connecting plates are all provided with slots at the ends away from the center axis of the stator yoke;
[0010] Each limiting strip has a protrusion that matches the slot at the end near the center axis of the stator yoke, and the slot and the protrusion are interference-fitted.
[0011] The slot passes through both ends of the connecting plate along the central axis of the stator yoke, and the width of the slot at any end of the radial direction of the stator yoke gradually decreases from the inside to the outside of the stator yoke.
[0012] Both ends of the stator yoke are detachably connected to insulating end plates, which are arranged along the axis of the stator yoke.
[0013] All insulating end plates include annular limiting rings. The limiting rings are placed coaxially with the stator yoke. Multiple limiting teeth are fixed on the outer peripheral wall of the limiting rings. The number of limiting teeth on the insulating end plates is equal to the number of limiting strips and they correspond one-to-one. The limiting teeth extend into the coil of the corresponding coil assembly.
[0014] Both ends of the limiting strip along the direction of the stator yoke axis abut against the limiting teeth at both ends.
[0015] The cross-section of the conductor of the coil winding along the axial direction is a rounded rectangle.
[0016] Each coil winding is wrapped with insulating paper near the end of the adjacent coil winding.
[0017] A pair of symmetrically placed binding rings are provided on the outer side of the stator yoke. The two binding rings are arranged along the axis of the stator yoke, and the ends of the limiting strips away from the central axis of the stator yoke are in contact with the inner peripheral wall of the binding rings.
[0018] An electric motor, including the aforementioned stator assembly.
[0019] An aircraft, including the aforementioned motor.
[0020] The beneficial effects of this utility model are:
[0021] 1. This application uses a detachable connection between the limiting strip and the connecting plate, which allows the coil winding to be pre-wound and formed externally before being placed on the connecting plate. Compared with the traditional method of directly winding the coil on the connecting plate, this application pre-wound the coil winding externally, effectively avoiding the physical obstruction caused by the stator yoke in space, greatly improving the operability and convenience of the winding process, effectively improving the winding efficiency, and effectively improving the tightness of each coil winding. This not only improves the winding quality of each coil winding, but also effectively increases the number of winding conductors that can be accommodated on a single connecting plate.
[0022] Furthermore, when any coil winding fails, the corresponding coil winding can be removed from the connecting plate simply by disassembling and separating the limiting strip from the corresponding connecting plate, effectively improving the efficiency and cost of stator assembly maintenance.
[0023] 2. Through the combination of the slot and the convex strip, and the design of the slot gradually shrinking from the inside to the outside, the convex strip is effectively prevented from misaligning and sliding along the radial direction of the stator yoke. Furthermore, through the combination of the two insulating end plates, the limiting strip is prevented from misaligning and sliding along the axis of the stator yoke. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0026] Figure 2 This is a schematic diagram of the structure of the limiting tooth part of this utility model;
[0027] Figure 3 This is a partial structural diagram of the limiting plate of this utility model;
[0028] Figure 4 This is a schematic diagram of a portion of the card slot structure of this utility model. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0030] This combination Figures 1 to 4 This invention describes an embodiment of a stator assembly. Specifically, the stator assembly is constructed as a split structure, comprising components such as a stator yoke 100, coil windings 200, a connecting plate 300, and a limiting strip 400. The limiting strip 400 is detachably connected to the connecting plate 300, allowing the coil windings 200 to be pre-formed externally before being fitted onto the connecting plate 300. Compared to the traditional method of directly winding the coils 200 onto the connecting plate 300, this invention pre-forms the coil windings 200 externally, effectively avoiding the physical obstruction caused by the stator yoke 100 in space, significantly improving the operability and convenience of the winding process, effectively increasing winding efficiency, and simultaneously improving the tightness of each coil winding 200. This not only improves the winding quality of each coil winding 200 but also effectively increases the number of winding conductors that can be accommodated on a single connecting plate 300.
[0031] Please refer to Figures 1 to 4 A stator assembly includes an annular stator yoke 100 and a coil winding 200;
[0032] A connecting plate 300 is fixed on the outer peripheral wall of the stator yoke 100. The connecting plate 300 extends radially along the stator yoke 100. There are multiple fixed plates, and the multiple connecting plates 300 are evenly distributed in a ring around the central axis of the stator yoke 100.
[0033] The coil winding 200 is formed by winding wire. The number of coil windings 200 and connecting plates 300 are equal and correspond one-to-one. The coil windings 200 are sleeved on the corresponding connecting plates 300.
[0034] The connecting plate 300 can be detachably connected to the limiting strip 400 at the end away from the central axis of the stator yoke 100. The coil winding 200 is located between the outer wall of the stator yoke 100 and the limiting strip 400. The limiting strip 400 is used to limit the movement of the coil winding 200 along the radial direction of the stator yoke 100.
[0035] Preferably, the stator yoke 100 and the connecting plate 300 are integrally formed, and the material of the stator yoke 100 can be B35A300;
[0036] When assembling the various components of the stator assembly, the coil winding 200 is pre-wound externally and then fitted onto the connecting plate 300. Then, the limiting strip 400 is installed on the corresponding connecting plate 300. The limiting strip 400 limits and blocks the coil winding 200 to prevent the coil winding 200 from sliding radially along the stator yoke 100.
[0037] This application uses a detachable connection between the limiting strip 400 and the connecting plate 300 to pre-form the coil winding 200 externally before placing it onto the connecting plate 300. Compared to the traditional method of directly winding the coil winding 200 on the connecting plate 300, this application pre-forms the coil winding 200 externally, effectively avoiding the physical obstruction caused by the stator yoke 100 in space, greatly improving the operability and convenience of the winding process, effectively increasing the winding efficiency, and also effectively improving the tightness of each coil winding 200. This not only improves the winding quality of each coil winding 200 but also effectively increases the number of winding conductors that can be accommodated on a single connecting plate 300.
[0038] Furthermore, when any coil winding 200 malfunctions, the limit strip 400 can be disassembled from the corresponding connecting plate 300 to remove the corresponding coil winding 200 from the connecting plate 300, effectively improving the efficiency and cost of stator assembly maintenance.
[0039] Each end of the connecting plate 300 away from the center axis of the stator yoke 100 is provided with a slot 301;
[0040] Each end of the limiting strip 400 near the central axis of the stator yoke 100 is fixed with a protrusion 401 that matches the slot 301, and the slot 301 and the protrusion 401 are interference fit.
[0041] The protrusion 401 and the slot 301 are designed to facilitate a detachable connection between the connecting plate 300 and the limiting plate.
[0042] Preferably, the limiting plate can also be detachably connected to the connecting plate 300 by bolts.
[0043] The slot 301 extends through both ends of the connecting plate 300 along the central axis of the stator yoke 100. The width of the slot 301 at any end of the stator yoke 100 in the radial direction gradually decreases from the inside to the outside of the stator yoke 100. The protrusion 401 is inserted into the slot 301 from any end of the connecting plate 300 along the axis of the stator yoke 100. Through the design of the slot 301 gradually shrinking from the inside to the outside, the protrusion 401 is effectively prevented from misaligning and sliding along the radial direction of the stator yoke 100.
[0044] The stator yoke 100 has detachable insulating end plates 500 at both ends, and the two insulating end plates 500 are arranged along the axial direction of the stator yoke 100.
[0045] Each insulating end plate 500 includes a circular limiting ring. The limiting ring is placed coaxially with the stator yoke 100. Multiple limiting teeth 501 are fixed on the outer peripheral wall of the limiting ring. The number of limiting teeth 501 on the insulating end plate 500 is equal to that of the limiting strip 400 and they correspond one-to-one. The limiting teeth 501 extend into the coil of the corresponding coil assembly.
[0046] Both ends of the limiting strip 400 along the axis of the stator yoke 100 abut against the limiting teeth 501 at both ends respectively;
[0047] The two insulating end plates 500 are designed to prevent the limiting strip 400 from sliding out of alignment along the axis of the stator yoke 100.
[0048] Preferably, the insulating end plate 500 can be detachably connected to the stator yoke 100 by bolts.
[0049] The cross-section of the conductor of the coil winding 200 along the axial direction is a rounded rectangle; compared with the circular conductor in the traditional existing technology, it effectively improves the density of the coil winding 200.
[0050] Each coil winding 200 is wrapped with insulating paper 600 at the end near the adjacent coil winding 200; the insulating paper 600 is used to prevent direct contact between two adjacent coil windings 200.
[0051] Preferably, the insulating paper 600 is made of NHN material; in other embodiments, the insulating paper 600 may also be made of other composite materials with a temperature index between 130 and 220°C.
[0052] A pair of symmetrically placed binding rings 700 are provided on the outer side of the stator yoke 100. The two binding rings 700 are arranged along the axial direction of the stator yoke 100. The ends of the limiting strips 400 away from the central axis of the stator yoke 100 are in contact with the inner peripheral wall of the binding rings 700.
[0053] Preferably, the binding ring 700 can be made of materials such as Kevlar wire, resin tape or carbon fiber.
[0054] An electric motor, including the aforementioned stator assembly.
[0055] An aircraft, including the aforementioned motor.
[0056] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0057] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims of this utility model.
Claims
1. A stator assembly comprising an annular stator yoke (100) and coil windings (200), characterized in that: A connecting plate (300) is fixed on the outer peripheral wall of the stator yoke (100). The connecting plate (300) extends radially along the stator yoke (100). There are multiple fixed plates, and the multiple connecting plates (300) are evenly distributed in a ring around the central axis of the stator yoke (100). The coil winding (200) is formed by winding wire. The number of coil windings (200) and connecting plates (300) are equal and correspond one-to-one. The coil windings (200) are sleeved on the corresponding connecting plates (300). The connecting plate (300) can be detachably connected to the limiting strip (400) at the end away from the central axis of the stator yoke (100). The coil winding (200) is located between the outer wall of the stator yoke (100) and the limiting strip (400). The limiting strip (400) is used to limit the radial movement of the coil winding (200) along the stator yoke (100).
2. The stator assembly according to claim 1, characterized in that... The connecting plate (300) is provided with a slot (301) at the end away from the center axis of the stator yoke (100); Each of the limiting strips (400) near the central axis of the stator yoke (100) is fixed with a protrusion (401) that matches the slot (301), and the slot (301) and the protrusion (401) are interference fit.
3. The stator assembly according to claim 2, characterized in that, The slot (301) passes through both ends of the connecting plate (300) along the central axis of the stator yoke (100), and the width of the slot (301) at any end of the radial direction of the stator yoke (100) gradually decreases from the inside to the outside of the stator yoke (100).
4. The stator assembly according to claim 3, characterized in that, The stator yoke (100) has detachable insulating end plates (500) at both ends, and the two insulating end plates (500) are arranged along the axis of the stator yoke (100). Each insulating end plate (500) includes a circular limiting ring. The limiting ring is placed coaxially with the stator yoke (100). Multiple limiting teeth (501) are fixed on the outer peripheral wall of the limiting ring. The number of limiting teeth (501) on the insulating end plate (500) is equal to the number of limiting strips (400) and they correspond one-to-one. The limiting teeth (501) extend into the coil of the corresponding coil assembly. Both ends of the limiting strip (400) along the axis of the stator yoke (100) abut against the limiting teeth (501) at both ends.
5. The stator assembly according to claim 4, characterized in that, The cross-section of the conductor of the coil winding (200) along the axial direction is a rounded rectangle.
6. The stator assembly according to claim 5, characterized in that, Each coil winding (200) is wrapped with insulating paper (600) at the end closest to the adjacent coil winding (200).
7. The stator assembly according to claim 6, characterized in that, A pair of symmetrically placed binding rings (700) are provided on the outside of the stator yoke (100). The two binding rings (700) are arranged along the axis of the stator yoke (100), and the ends of the limiting strips (400) away from the central axis of the stator yoke (100) are in contact with the inner peripheral wall of the binding rings (700).
8. An electric motor, characterized in that, Includes the stator assembly as described in any one of claims 1 to 7.
9. An aircraft, characterized in that, Includes the motor as described in claim 8.