Motor and extended range driving system

Abstract

The invention discloses a motor and a range extending driving system. The motor comprises a first rotor; the stator assembly is arranged on the first rotor in a sleeving manner; the second rotor is arranged on the stator assembly in a sleeving manner; wherein the stator assembly comprises a stator, a first winding and a second winding, the first winding is arranged on the inner wall of the stator and is arranged opposite to the first rotor, and the second winding is arranged on the peripheral wall of the stator and is arranged opposite to the second rotor. According to the motor, optimization of spatial arrangement can be realized, and miniaturization and lightweight design of the motor can be realized.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to an electric motor and a range-extending drive system. Background Technology

[0002] Range-extended electric vehicles (REEVs) are based on the drive structure of pure electric vehicles, with the addition of a range extender consisting of an engine and a generator. REEVs use batteries for short distances in urban areas, while for long-distance highway driving or when the battery is low, the engine drives the generator to produce electricity to power the battery and drive the vehicle, solving the problem of insufficient range in pure electric vehicles. REEVs require a battery pack, generator, engine, and drive motor, and are typically larger in size. Electric vehicles are currently trending towards miniaturization and lightweight design. Given the current state of drive motor design, achieving breakthroughs in miniaturization and weight reduction while meeting the high torque and efficiency requirements of automotive motors presents certain limitations.

[0003] Traditional range-extended drive systems can be divided into two main parts: the range extender system and the drive system. The range extender system is a system where the engine is directly connected to a compatible generator to supply power to the battery. The drive system consists of a drive motor, a gearbox, a differential, and other transmission structures. The battery output is connected to the drive motor and drives the wheels through the gearbox, differential, and other transmission structures. However, in this type of system, the range extender motor and the drive motor are structurally independent, occupying a lot of installation space and making it difficult to achieve miniaturization and lightweight design of the motor. Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a motor that enables optimized spatial arrangement, thereby facilitating the miniaturization and lightweight design of the motor.

[0005] An electric motor according to an embodiment of this application includes: a first rotor; a stator assembly sleeved on the first rotor; and a second rotor sleeved on the stator assembly; wherein the stator assembly includes a stator, a first winding, and a second winding, the first winding being disposed on the inner wall of the stator and disposed opposite to the first rotor, and the second winding being disposed on the outer peripheral wall of the stator and disposed opposite to the second rotor.

[0006] According to the embodiments of the present application, the stator assembly and the second rotor of the motor are sequentially sleeved on the first rotor, so that the first rotor, the stator assembly and the second rotor are distributed in the radial direction of the motor, thereby reducing the space occupied in the axial direction of the motor. In particular, by providing a first winding and a second winding on the stator, the first rotor and the second rotor can share the stator yoke of the stator, thereby making the arrangement of the drive motor composed of the stator, the first winding and the first rotor and the range extender motor composed of the stator, the second winding and the second rotor more compact, thereby optimizing the space arrangement and facilitating the miniaturization and lightweight design of the motor.

[0007] According to some embodiments of the motor in this application, the stator assembly further includes a magnetic shielding element located between the first winding and the second winding.

[0008] The motor according to some embodiments of this application further includes: a motor input shaft and a motor output shaft, one of which is poweredly connected to the first rotor and the other is poweredly connected to the second rotor.

[0009] According to some embodiments of the present application, the motor input shaft is poweredly connected to the second rotor, and the motor output shaft is poweredly connected to the first rotor.

[0010] The motor according to some embodiments of this application further includes: a housing having an installation space formed therein, wherein the first rotor, the stator assembly, and the second rotor are all located within the housing.

[0011] The motor according to some embodiments of this application further includes: a rotor support, the rotor support being connected between the motor input shaft and the second rotor, wherein the rotor support is sleeved on the motor output shaft and spaced apart from the motor output shaft.

[0012] According to some embodiments of the present application, the motor housing has a first opening communicating with the mounting space, the motor input shaft passes through the first opening to be connected to the rotor support, and the inner wall of the first opening is provided with a support bearing, the support bearing being sleeved on the motor input shaft.

[0013] The motor according to some embodiments of this application further includes: a first fixed bearing, wherein the motor input shaft is sleeved on the motor output shaft, and the first fixed bearing is installed on the inner wall of the motor input shaft and sleeved on the motor output shaft.

[0014] According to some embodiments of the present application, the motor housing is provided with a second opening communicating with the mounting space, the motor output shaft passes through the second opening, the inner wall of the second opening is provided with a second fixed bearing, and the second fixed bearing is sleeved on the motor output shaft.

[0015] This application also proposes a range-extending drive system.

[0016] The range-extended drive system according to an embodiment of this application includes: an engine and a motor as described in any of the above embodiments, wherein the output shaft of the engine is connected to a second rotor, the second winding is electrically connected to a battery via a motor controller, the first winding is electrically connected to the battery via a drive controller, and the first rotor is adapted to be powered to a wheel.

[0017] The range-extending drive system has the same advantages over the prior art as the motor described above, and will not be repeated here.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of a motor according to some embodiments of this application;

[0021] Figure 2 This is a schematic diagram of a range-extended drive system according to some embodiments of this application.

[0022] Figure label:

[0023] Range extender drive system 100;

[0024] 10 motors; 20 engines; 30 crankshafts; 40 gearboxes; 50 differentials; 60 shafts.

[0025] First rotor 1, stator assembly 2, stator 21, first winding 22, second winding 23;

[0026] Second rotor 3; motor input shaft 41, motor output shaft 42;

[0027] 5. Outer shell; 51. Installation space; 52. Left half shell; 53. Right half shell; 54. First opening; 55. Second opening;

[0028] Rotor support 6, stator support 61;

[0029] Support bearing 7, first fixed bearing 71, second fixed bearing 72. Detailed Implementation

[0030] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0031] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying 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 limitation, 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 said element. The term "two or more" includes two or more cases.

[0032] This application provides a range extender drive system 100, which can be used in electric vehicles or hybrid vehicles, and is not limited thereto.

[0033] Understandably, a range extender drive system typically consists of two main parts: a range extender system and a drive system. The range extender system is where the engine is directly connected to a compatible generator via a range extender motor to supply power to the battery. The drive system comprises a drive motor, a gearbox, a differential, and other transmission structures. The battery output is connected to the drive motor and drives the wheels via the gearbox, differential, and other transmission structures. However, this type of range extender system uses a range extender motor and a drive motor, respectively, meaning that a range extender drive system requires at least two motors. Since the range extender motor and drive motor are structurally independent, they occupy a significant amount of installation space, making it difficult to achieve miniaturization and lightweight design of the motors.

[0034] In response, this application proposes a motor 10 that can be used in a range extender drive system 100 to make the arrangement of the range extender motor 10 and the drive motor 10 more compact, thereby optimizing the space arrangement and facilitating the miniaturization and lightweight design of the motor 10, which in turn facilitates the miniaturization design of the range extender drive system 100.

[0035] like Figure 1 As shown, the motor 10 according to an embodiment of this application includes: a first rotor 1, a stator assembly 2, and a second rotor 3.

[0036] The stator assembly 2 is sleeved on the first rotor 1, and the second rotor 3 is sleeved on the stator assembly 2; wherein, the stator assembly 2 includes a stator 21, a first winding 22 and a second winding 23, the first winding 22 is disposed on the inner wall of the stator 21 and is disposed opposite to the first rotor 1, and the second winding 23 is disposed on the outer peripheral wall of the stator 21 and is disposed opposite to the second rotor 3.

[0037] It is understandable that the stator 21 is sleeved on the first rotor 1, the second rotor 3 is sleeved on the stator 21, the first winding 22 is located on the inner wall of the stator 21 and is arranged opposite to the first rotor 1, and the second winding 23 is located on the outer peripheral wall of the stator 21 and is arranged opposite to the second rotor 3.

[0038] The stator 21 includes a stator tooth section and a stator yoke section. The stator 21 of this application is an annular component. The inner wall of the stator 21 is provided with a first stator tooth section, which is used to install the first winding 22. In this way, the stator yoke section, the first stator tooth section, the first winding 22 and the first rotor 1 are combined to form an internal rotor motor.

[0039] The outer peripheral wall of the stator 21 is provided with a second stator tooth section, which is used to mount the second winding 23. In this way, the stator yoke, the second stator tooth section, the second winding 23, and the second rotor 3 are combined to form an external rotor motor.

[0040] In the range extender drive system 100, one of the inner rotor motor 10 and the outer rotor motor 10 can be used as a range extender motor, and the other can be used as a drive motor. This allows the range extender motor and the drive motor to share a stator yoke. The shared stator yoke configuration enables the motor 10 of this application to achieve an integrated design of the range extender motor and the drive motor, that is, the arrangement of the range extender motor and the drive motor is more compact, thereby optimizing the space layout and facilitating the miniaturization and lightweight design of the motor 10.

[0041] In particular, the stator assembly 2 and the second rotor 3 are sequentially fitted onto the first rotor 1, so that the first rotor 1, the stator assembly 2 and the second rotor 3 are distributed in the radial direction of the motor 10, thereby reducing the space occupied in the axial direction of the motor 10 and thus reducing the axial dimension of the motor 10.

[0042] According to the embodiments of the present application, the stator assembly 2 and the second rotor 3 of the motor 10 are sequentially sleeved on the first rotor 1, so that the first rotor 1, the stator assembly 2 and the second rotor 3 are distributed in the radial direction of the motor 10, thereby reducing the space occupied in the axial direction of the motor 10. In particular, by providing the first winding 22 and the second winding 23 on the stator 21, the first rotor 1 and the second rotor 3 can share the stator yoke of the stator 21, thereby making the arrangement of the drive motor 10 composed of the stator 21, the first winding 22 and the first rotor 1 and the range extender motor 10 composed of the stator 21, the second winding 23 and the second rotor 3 more compact, thereby optimizing the space arrangement and facilitating the miniaturization and lightweight design of the motor 10.

[0043] In some embodiments, the stator assembly 2 further includes a magnetic shield (not shown) located between the first winding 22 and the second winding 23.

[0044] It is understandable that since the first winding 22 and the second winding 23 are respectively disposed on the inner wall and the outer peripheral wall of the stator 21, that is, the first winding 22 and the second winding 23 are disposed on the same stator 21, the magnetic circuit generated by the first winding 22 and the magnetic circuit generated by the second winding 23 may interfere with each other. Therefore, in this application, a magnetic isolation component is provided between the first winding 22 and the second winding 23 to separate the magnetic circuit generated by the first winding 22 and the magnetic circuit generated by the second winding 23, thereby reducing the risk of mutual interference between the magnetic circuit generated by the first winding 22 and the magnetic circuit generated by the second winding 23, so that the first rotor 1 and the second rotor 3 can operate independently. Therefore, when the motor 10 is applied to the range extender drive system 100, the interference between functions can be reduced, thereby reducing the difficulty of its control.

[0045] In some implementations, the magnetic shielding component can be a magnetic shielding sheet, which can be made of a wave-absorbing material. This material has both magnetic absorption properties and electrical absorption properties. Alternatively, the magnetic shielding component can be a metal thin film, nanocrystalline material, ferrite material, or other material that can isolate the magnetic circuit. No limitation is made here.

[0046] In some embodiments, such as Figure 1 As shown, the motor 10 also includes a motor input shaft 41 and a motor output shaft 42, one of which is poweredly connected to the first rotor 1 and the other is poweredly connected to the second rotor 3.

[0047] For example, the motor input shaft 41 is powered to the first rotor 1, that is, the motor input shaft 41 is connected to the inner rotor motor, and the motor output shaft 42 is powered to the second rotor 3, that is, the motor output shaft 42 is connected to the outer rotor motor.

[0048] Or such as Figure 1As shown, the motor input shaft 41 is powered to the second rotor 3, that is, the motor input shaft 41 is connected to the outer rotor motor, and the motor output shaft 42 is powered to the first rotor 1, that is, the motor output shaft 42 is connected to the inner rotor motor.

[0049] In this way, the first rotor 1 and the second rotor 3 can be connected to the motor input shaft 41 and the motor output shaft 42 respectively. At the same time, since the first rotor 1 and the second rotor 3 can share the stator yoke of the stator 21, it is convenient to realize the integrated design of the external rotor motor and the internal rotor motor between the motor input shaft 41 and the motor output shaft 42, thereby optimizing the spatial arrangement and facilitating the miniaturization and lightweight design of the motor 10.

[0050] In some embodiments, such as Figure 1 As shown, the motor 10 also includes a housing 5, within which an installation space 51 is formed. The first rotor 1, the stator assembly 2, and the second rotor 3 are all located within the housing 5. This facilitates protection of the first rotor 1, the stator assembly 2, and the second rotor 3 through the housing 5.

[0051] In some embodiments, such as Figure 1 As shown, the motor 10 also includes a rotor support 6, which is connected between the motor input shaft 41 and the second rotor 3. The rotor support 6 is sleeved on the motor output shaft 42 and spaced apart from the motor output shaft 42.

[0052] This makes it easier to reduce the difficulty of connecting the motor input shaft 41 and the second rotor 3. The rotor support 6 is sleeved on the motor output shaft 42 and spaced apart from the motor output shaft 42, which can avoid interference between the rotor support 6 and the motor output shaft 42. It also allows the motor output shaft 42 to utilize the space inside the rotor support 6, thereby improving space utilization and realizing the miniaturization design of the motor 10.

[0053] In some embodiments, such as Figure 1 As shown, the outer casing 5 has a first opening 54 communicating with the installation space 51. The input shaft passes through the first opening 54 to be connected to the rotor support 6. The inner wall of the first opening 54 is provided with a support bearing 7, which is sleeved on the motor input shaft 41.

[0054] This allows the motor input shaft 41 to extend from the first opening 54, so that the motor input shaft 41 can be connected to other transmission structures. The motor input shaft 41 can also be connected to the housing 5 through the bracket bearing 7. In this way, the connection and fixation between the motor input shaft 41 and the housing 5 can be achieved while ensuring that the motor input shaft 41 can rotate normally, thereby enhancing the motion stability of the motor input shaft 41.

[0055] In some embodiments, such as Figure 1As shown, the motor 10 also includes: a first fixed bearing 71, the motor input shaft 41 is sleeved on the motor output shaft 42, and the first fixed bearing 71 is installed on the inner wall of the motor input shaft 41 and sleeved on the motor output shaft 42.

[0056] This arrangement allows the motor input shaft 41 and motor output shaft 42 to be coaxially aligned, with the motor input shaft 41 sleeved on the motor output shaft 42. This makes the arrangement of the motor input shaft 41 and motor output shaft 42 more compact, which is beneficial for miniaturizing the motor 10. At the same time, the first fixed bearing 71 is installed on the inner wall of the motor input shaft 41 and sleeved on the motor output shaft 42, allowing the motor input shaft 41 and motor output shaft 42 to rotate independently without interfering with each other's rotation. This facilitates the independent operation of the external rotor motor and the internal rotor motor.

[0057] In some embodiments, such as Figure 1 As shown, the outer casing 5 is provided with a second opening 55 that communicates with the installation space 51. The motor output shaft 42 passes through the second opening 55. The inner wall of the second opening 55 is provided with a second fixed bearing 72, which is sleeved on the motor output shaft 42.

[0058] This allows the motor output shaft 42 to extend out from the second opening 55, so that the motor output shaft 42 can be connected to other transmission structures. The motor output shaft 42 can also be connected to the housing 5 through the second fixed bearing 72. In this way, the connection and fixation between the motor output shaft 42 and the housing 5 can be achieved while ensuring that the motor output shaft 42 can rotate normally, thereby enhancing the motion stability of the motor output shaft 42.

[0059] In some embodiments, such as Figure 1 As shown, the outer shell 5 includes a left half shell 52 and a right half shell 53. The left half shell 52 and the right half shell 53 are connected to define the installation space 51. A first opening 54 is provided in the left half shell 52, and a second opening 55 is provided in the right half shell 53. The rotor support 6 is provided inside the left half shell 52, and the stator assembly 2 is fixedly connected to the right half shell 53 through the stator support 61. In this way, it is convenient to make full use of the space inside the left half shell 52 and the right half shell 53 to arrange the rotor support 6 and the mover support, thereby improving the space utilization rate and avoiding interference between the rotor support 6 and the mover support.

[0060] like Figure 2 As shown, this application also proposes a range-extending drive system 100.

[0061] like Figure 2As shown, the range-extended drive system 100 according to an embodiment of this application includes: an engine 20 and a motor 10 of any of the above embodiments. The output shaft of the engine 20 is connected to a second rotor 3. The second winding 23 is electrically connected to a battery through a motor 10 controller. The first winding 22 is electrically connected to a battery through a drive controller. The first rotor 1 is adapted to be powered to the wheels.

[0062] It is understandable that, such as Figure 2 As shown, the output shaft of the engine 20 can be connected to the motor input shaft 41 via the crankshaft 30. The motor input shaft 41 is connected to the second rotor 3 via the rotor bracket 6. The first rotor 1 is connected to the motor output shaft 42. The motor output shaft 42 is connected to the rotating shaft 60. The rotating shaft 60 is suitable for connecting to the wheel. A reduction gearbox 40 and a differential 50 are also connected between the motor output shaft 42 and the rotating shaft 60.

[0063] Thus, when the range-extended drive system 100 is applied to a vehicle, the range-extended drive system 100 has at least the following operating modes:

[0064] (1) Range-extending generator mode: At this time, the engine 20 is working and transmits the input torque to the second rotor 3 through the crankshaft 30, the motor input shaft 41 and the rotor support 6. At this time, the outer rotor motor is in generator mode. The second rotor 3 rotates and the second winding 23 outputs three-phase current. The output current charges the battery through the generator 10 controller.

[0065] (2) Drive mode. At this time, the first rotor 1 is working. The battery supplies three-phase current to the first winding 22 through the controller of the drive motor 10, driving the first rotor 1 to rotate. At this time, the inner rotor motor is in drive mode. The torque generated is transmitted to the gearbox 40 and differential 50 through the motor output shaft 42, and finally output to the rotating shaft 60 to drive the wheels to rotate.

[0066] (3) Simultaneous operation mode of range-extended power generation and drive mode: In this mode, the first two operating conditions work simultaneously and operate independently of each other.

[0067] It is understandable that, in designing the range-extended drive system 100 in this application, using the motor 10 from any of the above embodiments instead of the range-extended generator 10 and the drive motor 10 can effectively optimize the space occupied by the range-extended drive system 100, increase the volumetric power density, and reduce the raw material costs of components such as the electric drive core, housing, and shaft. Furthermore, integrating the range-extended generator 10 and the drive motor 10 into a single housing reduces many connections and transmission devices, thus improving the overall system output efficiency to a certain extent. Additionally, through controller integration design, the controller can be optimized, further simplifying the structure of the range-extended drive system 100.

[0068] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0069] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0070] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0071] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0072] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0073] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric motor (10), characterized in that, include: First rotor (1); Stator assembly (2), which is sleeved on the first rotor (1); The second rotor (3) is sleeved on the stator assembly (2); The stator assembly (2) includes a stator (21), a first winding (22) and a second winding (23). The first winding (22) is disposed on the inner wall of the stator (21) and is disposed opposite to the first rotor (1). The second winding (23) is disposed on the outer peripheral wall of the stator (21) and is disposed opposite to the second rotor (3).

2. The motor (10) according to claim 1, characterized in that, The stator assembly (2) further includes a magnetic shielding element located between the first winding (22) and the second winding (23).

3. The motor (10) according to claim 1, characterized in that, Also includes: The motor input shaft (41) and the motor output shaft (42) are connected, one of which is powered to the first rotor (1) and the other is powered to the second rotor (3).

4. The motor (10) according to claim 3, characterized in that, The motor input shaft (41) is powered to the second rotor (3), and the motor output shaft (42) is powered to the first rotor (1).

5. The motor (10) according to claim 4, characterized in that, Also includes: The housing (5) has an installation space (51) formed inside it, and the first rotor (1), the stator assembly (2) and the second rotor (3) are all located inside the housing (5).

6. The motor (10) according to claim 5, characterized in that, Also includes: Rotor support (6) is connected between the motor input shaft (41) and the second rotor (3), wherein the rotor support (6) is sleeved on the motor output shaft (42) and spaced apart from the motor output shaft (42).

7. The motor (10) according to claim 5, characterized in that, The outer casing (5) has a first opening (54) communicating with the installation space (51). The motor input shaft (41) passes through the first opening (54) to be connected to the rotor support (6). The inner wall of the first opening (54) is provided with a support bearing (7), which is sleeved on the motor input shaft (41).

8. The motor (10) according to claim 7, characterized in that, Also includes: The first fixed bearing (71) is installed on the inner wall of the motor input shaft (41) and sleeved on the motor output shaft (42).

9. The motor (10) according to claim 7, characterized in that, The outer casing (5) is provided with a second opening (55) communicating with the installation space (51), the motor output shaft (42) passes through the second opening (55), the inner wall of the second opening (55) is provided with a second fixed bearing (72), and the second fixed bearing (72) is sleeved on the motor output shaft (42).

10. A range-extending drive system (100), characterized in that, include: The engine (20) and the motor (10) according to any one of claims 1-9, wherein the output shaft of the engine (20) is connected to the second rotor (3), the second winding (23) is electrically connected to the battery via the motor (10) controller, the first winding (22) is electrically connected to the battery via the drive controller, and the first rotor (1) is adapted to be powered by the wheels.

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