Stator assembly, motor, electric driving system and aircraft

Abstract

The utility model provides a stator assembly, a motor, an electric drive system and an aircraft, the stator assembly comprises a stator body, the stator body is provided with a plurality of stator teeth, the plurality of stator teeth are arranged at intervals along the circumferential direction of the stator body, a stator slot is formed between adjacent stator teeth, an installation space for installing a winding is formed in the stator slot, and the winding is arranged in the installation space. A plurality of fan-shaped regions are formed along the circumferential direction of the stator body, each fan-shaped region comprises a plurality of stator slots, a plurality of windings in each fan-shaped region are connected to form a three-phase control circuit, and the three-phase control circuits in different fan-shaped regions are relatively independently controlled. The problem of insufficient safety redundancy design of the stator assembly in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of stator assembly structure design, and in particular, to a stator assembly, a motor, an electric drive system and an aircraft. Background Art

[0002] The field of electric aviation is in a stage of rapid development. Electric aviation motors have very strict reliability requirements. Traditional aviation motors mostly adopt a three-phase winding method. When a winding fails, it will directly affect the safety of the aircraft. At the same time, traditional outer-rotor motors mostly adopt a low protection level design such as IP21, and sundries such as rainwater and sand and dust can enter the motor interior, affecting the safe operation of the motor.

[0003] In view of the above problems in the prior art, no effective solution has been proposed yet. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a stator assembly, a motor, an electric drive system and an aircraft to solve the problem of insufficient safety redundancy design of the stator assembly in the prior art.

[0005] To achieve the above purpose, according to one aspect of the utility model, a stator assembly is provided, including: a stator body, on which a plurality of stator teeth are provided, the plurality of stator teeth are arranged at intervals along the circumferential direction of the stator body, a stator slot is formed between adjacent stator teeth, an installation space for installing a winding is formed in the stator slot, a plurality of fan-shaped areas are formed along the circumferential direction of the stator body, each fan-shaped area includes a plurality of stator slots, and the windings in each fan-shaped area are connected to form a three-phase control circuit, and the three-phase control circuits in different fan-shaped areas are controlled relatively independently.

[0006] Further, the plurality of fan-shaped areas are correspondingly arranged with a plurality of inverters, wherein, the windings in the same fan-shaped area are electrically connected to the inverter corresponding to the fan-shaped area, and the plurality of inverters are arranged and operate relatively independently.

[0007] Further, a plurality of winding parts are provided in each fan-shaped area, each winding part is formed by connecting a plurality of windings distributed in different stator slots in series, and the plurality of winding parts are all electrically connected to the inverter corresponding to the fan-shaped area, and the plurality of winding parts include a U-phase winding part, a V-phase winding part and a W-phase winding part.

[0008] Further, a plurality of busbars are further provided on the stator body, the plurality of busbars are arranged corresponding to the plurality of winding parts one by one, the busbars are arranged at one end of the stator body in the axial direction, the busbars are electrically connected to the star points formed by connecting with the corresponding winding parts, the busbars are electrically connected to the corresponding inverters, and the plurality of windings in the winding parts are electrically connected to the corresponding inverters through the busbars.

[0009] Further, there are six sector areas, and the six sector areas are evenly spaced in the circumferential direction of the stator body.

[0010] Further, slot insulation is provided in each stator slot. The slot insulation is a thin-walled cavity structure formed by bending, and the slot insulation forms two relatively independent installation spaces. The two windings located in the same stator slot are respectively disposed in the two installation spaces.

[0011] Further, a slot wedge is provided at the slot opening position of the stator slot, and the slot wedge is clamped between two adjacent stator teeth.

[0012] Further, the stator assembly further includes: two labyrinth rings. The two labyrinth rings are disposed at both axial ends of the stator body. The labyrinth rings are disposed outside the ends of the windings protruding axially from the stator slots along the stator body, so as to form a sealed space around the ends of the windings.

[0013] Further, the stator assembly further includes: two insulating end plates. The two insulating end plates are disposed at both axial ends of the stator body. The labyrinth rings are connected to the insulating end plates, and the ends of the windings protruding axially from the stator slots along the stator body are located between the insulating end plates and the labyrinth rings.

[0014] Further, a winding potting protection layer is provided outside the labyrinth rings.

[0015] Further, the labyrinth ring includes a first connection section and two second connection sections. Along the axial direction of the stator body, the first connection section is located outside the end of the winding protruding from the stator slot. Along the radial direction of the stator body, the two second connection sections are respectively located outside the end of the winding protruding from the stator slot. The two second connection sections are respectively connected to both ends of the first connection section, so that the labyrinth ring forms a bent structure with one end open. The open side of the labyrinth ring faces the insulating end plate, and one ends of the two second connection sections close to the open side are both connected to the insulating end plate.

[0016] According to one aspect of the present invention, there is provided a motor, including a stator assembly, and the stator assembly is the above-mentioned stator assembly.

[0017] According to another aspect of the present invention, there is provided an electric drive system, including a motor, and the motor is the above-mentioned motor.

[0018] According to another aspect of the present invention, there is provided an aircraft, including an electric drive system, and the electric drive system is the above-mentioned electric drive system.

[0019] Applying the technical solution of the present utility model, by forming a plurality of sector areas in the circumferential direction of the stator body, and connecting the multiple windings in each sector area to form a three-phase control circuit, the stator assembly realizes high-redundancy control backup. When one, two, or three unit motor windings in the stator assembly fail, the motor can still operate. Adopting the technical solution of this application effectively solves the problem of insufficient safety redundancy design of the stator assembly in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0021] Figure 1 shows a schematic structural diagram of a first embodiment of a stator assembly according to the present utility model;

[0022] Figure 2 shows a schematic structural diagram of an embodiment of a stator body according to the present utility model;

[0023] Figure 3 shows a schematic structural diagram of a second embodiment of a stator assembly according to the present utility model;

[0024] Figure 4 shows a schematic structural diagram of a third embodiment of a stator assembly according to the present utility model;

[0025] Figure 5 shows a schematic structural diagram of a fourth embodiment of a stator assembly according to the present utility model.

[0026] Among them, the above-mentioned drawings include the following reference numerals:

[0027] 1, stator body; 2, stator teeth; 3, stator slots; 4, windings; 5, sector areas; 6, winding parts; 8, insulation in slots; 9, slot wedges; 11, insulating end plates;

[0028] 20, W-phase connection terminal; 21, U-phase connection terminal; 22, V-phase connection terminal; 23, star point connection terminal. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] It should be noted that the terms "first", "second", etc. in the description, claims and drawings of the present application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0032] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many different forms and should not be construed as being limited only to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present application is thorough and complete, and the concepts of these exemplary embodiments are fully conveyed to those of ordinary skill in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and thus their description will be omitted.

[0033] Combined with Figures 1 to 5 As shown, according to a specific embodiment of the present application, a stator assembly is provided.

[0034] The stator assembly includes: a stator body 1. A plurality of stator teeth 2 are provided on the stator body 1. The plurality of stator teeth 2 are circumferentially spaced apart on the stator body 1. A stator slot 3 is formed between adjacent stator teeth 2. An installation space for installing a winding 4 is formed in the stator slot 3. A plurality of fan-shaped regions 5 are formed along the circumference of the stator body 1. Each fan-shaped region 5 includes a plurality of stator slots 3. The windings 4 in each fan-shaped region 5 are connected to form a three-phase control circuit, and the three-phase control circuits in different fan-shaped regions 5 are controlled relatively independently.

[0035] Applying the technical solution of the present application, by forming a plurality of sector areas 5 in the circumferential direction of the stator body 1, and connecting the plurality of windings 4 in each sector area 5 to form a three-phase control circuit, the stator assembly realizes high-redundancy control backup. When three or fewer unit motor windings in the stator assembly fail, the motor can still operate. Adopting the technical solution of the present application effectively solves the problem of insufficient safety redundancy design of the stator assembly in the prior art.

[0036] Furthermore, the plurality of sector areas 5 are correspondingly arranged with a plurality of inverters. Among them, the plurality of windings 4 located in the same sector area 5 are electrically connected to the inverter corresponding to this sector area 5, and the plurality of inverters are arranged and operate relatively independently.

[0037] Specifically, a three-phase motor has three output terminals, respectively marked as U, V, and W, corresponding to the windings of three phases. The connection sequence of the terminals determines the rotation direction of the motor, and usually needs to match the output of the inverter.

[0038] The busbar is used to collect the current of the three-phase motor, simplify the wiring, and provide a stable current path. The busbar is usually connected to the output terminals of the inverter to supply the three-phase alternating current generated by the inverter to the motor.

[0039] Specifically, the inverter converts a battery or other DC power source into three-phase alternating current to drive the three-phase motor. The inverter uses PWM technology to control the amplitude and frequency of the output voltage, thereby controlling the speed and torque of the motor.

[0040] The input end of the inverter is connected to a DC power source, such as a battery or a rectifier. The output end of the inverter is connected to the UVW terminals of the three-phase motor through a busbar. By adjusting the frequency of the alternating current output by the inverter, the synchronous speed of the motor can be controlled. By adjusting the amplitude of the alternating current voltage output by the inverter, the torque generated by the motor can be controlled. The inverter controls the voltage phase of each phase to maintain the rotating magnetic field in the motor windings. The inverter can quickly respond to load changes and adjust the output to adapt to different working conditions.

[0041] Electrically connecting the plurality of windings 4 located in the same sector area 5 to the inverter corresponding to this sector area 5 enables each sector area 5 to form an independently controlled three-phase motor unit.

[0042] Furthermore, a plurality of winding parts 6 are arranged in each sector area 5. Each winding part 6 is formed by connecting a plurality of windings 4 distributed in different stator slots 3 in series. The plurality of winding parts 6 are all electrically connected to the inverter corresponding to this sector area 5. The plurality of winding parts 6 include a U-phase winding part, a V-phase winding part, and a W-phase winding part.

[0043] Such as Figure 1As shown, a winding part 6 is formed by connecting three windings in series. One winding part 6 forms a U-phase winding, and the other two winding parts 6 in the figure respectively form a V-phase winding part and a W-phase winding part. The three winding parts 6 are electrically connected to a single inverter through busbars, thus forming a sector 5. A plurality of windings 4 within a sector 5 together form a three-phase control circuit.

[0044] Figure 1 Also shown in the figure are a W-phase connection terminal 20, a U-phase connection terminal 21, a V-phase connection terminal 22, and a star connection terminal 23. Among them, the leading ends of each winding part 6 respectively form the W-phase connection terminal 20, the U-phase connection terminal 21, and the V-phase connection terminal 22, and the trailing ends of each winding part 6 all form a star connection terminal 23.

[0045] Optionally, the winding 4 is a flat wire winding. The flat wire winding is rectangular. Preferably, the length of the flat wire winding is 2.5 mm - 5.0 mm, the thickness is 0.5 mm - 0.7 mm, and it is placed in the slots of the four sectors of the stator core.

[0046] Furthermore, a plurality of busbars are also provided on the stator body 1. The plurality of busbars are arranged in one-to-one correspondence with the plurality of winding parts 6. The busbars are arranged at one end of the stator body 1 in the axial direction. The busbars are electrically connected to the star point formed by connecting with the corresponding winding part 6. The busbars are electrically connected to the corresponding inverter. The plurality of windings 4 within the winding part 6 are electrically connected to the corresponding inverter through the busbars.

[0047] Optionally, the wiring connections of the plurality of windings 4 within each sector 5 to form a three-phase control circuit can be different. For example:

[0048] 1. Star (Y-shaped) connection:

[0049] In the star connection, the ends of the three windings (U, V, W) of the motor are connected together to form a common point, called the neutral point or star point.

[0050] The leading end of each winding (U, V, W) is respectively connected to the three phases of the three-phase power supply (usually marked as L1, L2, L3).

[0051] This connection can provide a lower starting current and higher operating efficiency, and is suitable for most industrial applications.

[0052] 2. Delta (Δ-shaped) connection:

[0053] In the delta connection, the three windings of the motor are connected end to end to form a closed triangle.

[0054] Each vertex of the triangle is respectively connected to the three phases of the three-phase power supply.

[0055] The delta connection usually provides a higher starting torque and is suitable for applications that require a high starting torque, such as cranes and certain types of pumps.

[0056] Double-star connection: The motor windings can be connected in two stars, providing additional flexibility and control options.

[0057] Hybrid connection: Some special applications may require the combination of star and delta connections.

[0058] Furthermore, there are six sectors 5, and the six sectors 5 are evenly spaced in the circumferential direction of the stator body 1.

[0059] Specifically, as Figure 5 shown, the winding is divided into six sectors, and a three-phase unit motor is distributed in each sector. Each unit motor is connected to a different inverter and operates independently. This setting can greatly improve the reliability of the aviation motor, reduce the safety risk of the manned aircraft, and at the same time improve the motor protection level through the winding sealing labyrinth ring and the winding potting protection layer.

[0060] Furthermore, slot insulation 8 is provided in each stator slot 3. The slot insulation 8 is a thin-walled cavity structure formed by bending. The slot insulation 8 forms two relatively independent installation spaces, and the two windings 4 located in the same stator slot 3 are respectively passed through the two installation spaces.

[0061] The slot insulation 8 provides electrical isolation for the windings, prevents short circuits between the windings, and ensures the safe operation of the motor. The slot insulation 8 is set as a thin-walled structure, which can improve the insulation performance of the motor and reduce the risk of electric leakage and breakdown.

[0062] The slot insulation 8 is placed at the bottom of the slot and bent to act as interlayer insulation.

[0063] Preferably, the thickness of the slot insulation is 0.2 mm - 0.3 mm.

[0064] Furthermore, a slot wedge 9 is provided at the notch position of the stator slot 3, and the slot wedge 9 is clamped between two adjacent stator teeth 2.

[0065] The slot wedge 9 is used to fix the position of the winding in the stator slot and prevent the winding from moving or vibrating during motor operation. The slot wedge 9 increases the structural stability of the stator slot and reduces deformation caused by mechanical stress or thermal expansion.

[0066] The slot wedge 9 helps to isolate the winding from the stator core and reduce the short-circuit risk caused by the contact between the winding and the core.

[0067] Optionally, the slot wedge 9 has good thermal conductivity, which helps to transfer the heat generated by the winding to the stator core, thereby improving the heat dissipation efficiency.

[0068] Optionally, the slot wedge 9 can fill the gap between the winding and the slot wall, reduce the air gap, and thus reduce the noise and vibration of the motor. The slot wedge made of insulating material can improve the insulation performance between the winding and the core and prevent electrical faults.

[0069] The slot wedges 9 provide necessary support for the windings, especially when running under high load or high speed. The slot wedges 9 simplify the installation process of the windings and can be easily replaced or adjusted when necessary. The slot wedges 9 can prevent dust, moisture or other foreign matter from entering the stator slots, protecting the windings and the core from damage.

[0070] The slot wedge 9 helps to evenly distribute the stress of the electromagnetic wire in the slot, thereby improving the load capacity of the electromagnetic wire.

[0071] Furthermore, the stator assembly also includes: two labyrinth rings, which are arranged at both axial ends of the stator body 1. The labyrinth rings are arranged on the outside of the ends of the winding 4 protruding axially from the stator slot 3 along the stator body 1, so as to form a sealed space around the ends of the winding 4.

[0072] In the technical solution of the above embodiment, the winding ends at both axial ends of the stator body 1 are protected by labyrinth rings to form a sealed space, which can further improve the protection performance of the stator assembly, and can achieve both electromagnetic interference protection and waterproof and dustproof.

[0073] The design of the labyrinth ring enables the stator assembly to adapt to more complex working environments, such as humid, dusty or high temperature environments.

[0074] Furthermore, the labyrinth ring can prevent moisture, dust and other contaminants from entering the windings, extending the service life of the motor.

[0075] In some application scenarios of stator components subjected to impact loads, the labyrinth ring can provide additional support for the winding ends to a certain extent, reducing damage caused by mechanical vibration or impact.

[0076] Furthermore, the stator assembly also includes: an insulating end plate 11, two insulating end plates 11, the two insulating end plates 11 are arranged at both axial ends of the stator body 1, the labyrinth ring is connected to the insulating end plate 11, and the end of the winding 4 protruding from the stator slot 3 along the axial direction of the stator body 1 is located between the insulating end plate 11 and the labyrinth ring.

[0077] The ends of the winding 4 protruding out of the stator slots are protected by the insulating end plate 11 and the labyrinth ring, thereby improving the working stability of the labyrinth ring.

[0078] Furthermore, a winding potting protection layer is provided on the outer side of the labyrinth ring.

[0079] The winding potting protection layer can be a special resin or gel-like substance used to encapsulate and protect the winding.

[0080] The winding potting protective layer can provide an additional insulating layer to prevent electrical breakdown and short circuit, enhancing the electrical safety of the motor; the winding potting protective layer protects the winding from mechanical shock and vibration, reducing failures caused by physical damage.

[0081] The winding potting protective layer helps with heat conduction, transferring the heat generated by the winding to the motor housing or radiator to improve the heat dissipation efficiency. It fixes the position of the winding in the stator slots to prevent the winding from moving or being misaligned during motor operation.

[0082] Furthermore, the labyrinth ring includes a first connecting section and two second connecting sections. Along the axial direction of the stator body 1, the first connecting section is located outside the end of the winding protruding from the stator slot 3. Along the radial direction of the stator body 1, the two second connecting sections are respectively located outside the end of the winding protruding from the stator slot 3. The two second connecting sections are respectively connected to both ends of the first connecting section, so that the labyrinth ring forms a bent structure with one end open. The open side of the labyrinth ring faces the insulating end plate 11, and one end of the two second connecting sections close to the open side is connected to the insulating end plate 11.

[0083] Through the above arrangement, the labyrinth ring has a relatively high structural strength and is in a C-shaped structure with the open side facing the insulating end plate 11, which can effectively protect the winding 4.

[0084] In an alternative embodiment, the stator core includes a plurality of stacked stator laminations.

[0085] Specifically, the stator lamination is a circular lamination, and the outer diameter of the lamination is 350 mm - 400 mm.

[0086] According to one aspect of the present invention, there is provided a motor, including a stator assembly, and the stator assembly is the stator assembly in the above embodiment.

[0087] According to another aspect of the present invention, there is provided an electric drive system, including a motor, and the motor is the motor in the above embodiment.

[0088] According to another aspect of the present invention, there is provided an aircraft, including an electric drive system, and the electric drive system is the electric drive system in the above embodiment.

[0089] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0090] There is provided an electric drive system with high redundancy. The electric drive system includes a stator core, slot insulation, interlayer insulation, flat wire winding, slot wedge, stator busbar, winding sealing labyrinth ring, winding potting protective layer, etc.

[0091] The busbar discharge is placed at the winding end for connecting the star point and connecting with multiple inverters.

[0092] The winding sealing labyrinth ring is placed at the winding end to protect the winding and improve the protection level.

[0093] The winding potting protective layer is placed on the outermost layer of the winding end to protect the winding and improve the protection level.

[0094] The insulating end plates are placed at both ends of the stator core.

[0095] The electric drive system arranges six unit motors through six sectors respectively, and each unit motor adopts independent inverter control, thus improving the reliability of the aircraft drive system.

[0096] The winding end uses a labyrinth sealing ring and a potting protective layer to strengthen the stator protection level.

[0097] For the sake of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial position relationship between a device or feature shown in the figure and other devices or features. It should be understood that spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned as "below" or "under" other devices or structures afterwards. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0098] In addition to the above, it should also be noted that "one embodiment", "another embodiment", "embodiment" etc. mentioned in this specification refer to the specific features, structures or characteristics described in connection with that embodiment being included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in connection with any one embodiment, it is intended that implementing such feature, structure or characteristic in connection with other embodiments also falls within the scope of the present utility model.

[0099] In the above embodiments, the descriptions of each embodiment have their own focuses. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0100] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A stator assembly, characterized in that, Comprising: A stator body (1) is provided with a plurality of stator teeth (2). The plurality of stator teeth (2) are arranged at intervals along the circumferential direction of the stator body (1). A stator slot (3) is formed between adjacent stator teeth (2). An installation space for installing a winding (4) is formed in the stator slot (3). A plurality of sector areas (5) are formed along the circumferential direction of the stator body (1). Each sector area (5) includes a plurality of stator slots (3). The windings (4) in each sector area (5) are connected to form a three-phase control circuit, and the three-phase control circuits in different sector areas (5) are controlled relatively independently.

2. The stator assembly according to claim 1, characterized in that, A plurality of the sector areas (5) are correspondingly arranged with a plurality of inverters. Among them, the windings (4) in the same sector area (5) are electrically connected to the inverter corresponding to this sector area (5), and the plurality of inverters are arranged and operate relatively independently.

3. The stator assembly according to claim 2, characterized in that, Each sector area (5) is provided with a plurality of winding parts (6). Each winding part (6) is formed by connecting a plurality of windings (4) distributed in different stator slots (3) in series. The plurality of winding parts (6) are all electrically connected to the inverter corresponding to this sector area (5). The plurality of winding parts (6) include a U-phase winding part, a V-phase winding part, and a W-phase winding part.

4. The stator assembly according to claim 3, wherein, A plurality of busbars are further provided on the stator body (1). The plurality of busbars are arranged in one-to-one correspondence with the plurality of winding parts (6). The busbars are arranged at one end of the stator body (1) in the axial direction. The busbars are electrically connected to the star points formed by connecting with the corresponding winding parts (6). The busbars are electrically connected to the corresponding inverters. The plurality of windings (4) in the winding part (6) are electrically connected to the corresponding inverters through the busbars.

5. The stator assembly according to any one of claims 1 to 4, characterized in that, There are six sector areas (5), and the six sector areas (5) are arranged at equal intervals along the circumferential direction of the stator body (1).

6. The stator assembly according to any one of claims 1 to 4, characterized in that, Slot insulation (8) is provided in each stator slot (3). The slot insulation (8) is a thin-walled cavity structure formed by bending, and the slot insulation (8) forms two relatively independent installation spaces. The two windings (4) in the same stator slot (3) are respectively inserted into the two installation spaces.

7. The stator assembly according to any one of claims 1 to 4, characterized in that, A slot wedge (9) is provided at the slot opening position of the stator slot (3), and the slot wedge (9) is clamped between two adjacent stator teeth (2).

8. The stator assembly according to claim 1, wherein, The stator assembly further includes: labyrinth rings. There are two labyrinth rings, and the two labyrinth rings are arranged at both axial ends of the stator body (1). The labyrinth rings are arranged outside the ends of the windings (4) protruding from the stator slots (3) along the axial direction of the stator body (1) to form a sealed space around the ends of the windings (4).

9. The stator assembly according to claim 8, wherein The stator assembly further includes: insulating end plates (11), there are two insulating end plates (11), the two insulating end plates (11) are arranged at both axial ends of the stator body (1), the labyrinth ring is connected to the insulating end plate (11), and the end of the winding (4) protruding axially from the stator slot (3) of the stator body (1) is located between the insulating end plate (11) and the labyrinth ring.

10. The stator assembly according to claim 8 or 9, characterized in that, A winding potting protection layer is arranged on the outer side of the labyrinth ring.

11. The stator assembly according to claim 9, wherein The labyrinth ring includes a first connection section and two second connection sections. Along the axial direction of the stator body (1), the first connection section is located outside the end of the winding (4) protruding from the stator slot (3). Along the radial direction of the stator body (1), the two second connection sections are respectively located outside the end of the winding protruding from the stator slot (3). The two second connection sections are respectively connected to both ends of the first connection section, so that the labyrinth ring forms a bent structure with one end open. The open side of the labyrinth ring faces the insulating end plate (11), and one end of the two second connection sections close to the open side is connected to the insulating end plate (11).

12. A motor, comprising a stator assembly, characterized in that, The stator assembly is the stator assembly according to any one of claims 1 to 11.

13. An electric drive system includes a motor, characterized in that, The motor is the motor according to claim 12.

14. An aircraft, comprising an electric drive system, characterized in that, The electric drive system is the electric drive system according to claim 13.

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