Conjugate motors, drive systems and vehicles

Abstract

This utility model relates to the field of new energy vehicles, specifically to a conjugate motor, a drive system, and a vehicle. The first aspect of this utility model provides a conjugate motor comprising an outer motor and an inner motor. The outer motor includes an outer rotor and an outer stator, and the inner motor includes an inner rotor and an inner stator. The outer rotor, outer stator, inner stator, and inner rotor are arranged sequentially from the outside to the inside, and the outer stator and inner stator share a yoke. The outer motor is a permanent magnet motor, and the inner motor is an induction motor. The conjugate motor, drive system, and vehicle provided by this utility model aim to solve or improve the problem that hybrid architectures occupy too much vehicle space, which is detrimental to meeting users' needs for interior space.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicles, specifically to a conjugate motor, a drive system, and a vehicle. Background Technology

[0002] In the field of new energy vehicles, the P1P3 hybrid architecture has certain technological advantages. The P1 motor is usually installed at the crankshaft end of the engine. It can quickly respond and output power when the vehicle starts, idles, and drives at low speeds, assisting the engine to achieve more efficient operation. For example, when the vehicle is cold-started, the P1 motor can quickly drive the engine to the appropriate operating speed, avoiding the engine from running in the low-efficiency range for too long, thereby reducing fuel consumption and emissions.

[0003] The P3 motor is typically located at the output shaft of the vehicle's transmission, directly driving the wheels. When the vehicle needs rapid acceleration or high-speed driving, the P3 motor can provide power support, working in conjunction with the engine to achieve power output and meet the user's needs for vehicle power.

[0004] However, this hybrid architecture in related technologies occupies a significant amount of space in the vehicle, which is not conducive to meeting users' needs for interior space. Utility Model Content

[0005] This utility model provides a conjugate motor, a drive system, and a vehicle to solve or improve the problem that hybrid architecture occupies too much vehicle space, which is not conducive to meeting users' needs for interior space.

[0006] The first aspect of this utility model provides a conjugate motor, including an outer motor and an inner motor, wherein the outer motor includes an outer rotor and an outer stator, and the inner motor includes an inner rotor and an inner stator;

[0007] The outer rotor, the outer stator, the inner stator, and the inner rotor are arranged sequentially from the outside to the inside, and the outer stator and the inner stator share a yoke.

[0008] The external motor is a permanent magnet motor, and the internal motor is an induction motor.

[0009] Beneficial effects:

[0010] The conjugate motor provided by this utility model includes an outer motor and an inner motor, which are radially nested together. Specifically, the outer rotor and outer stator of the outer motor, and the inner stator and inner rotor of the inner motor are sequentially nested together radially from the outside to the inside, and the yokes of the inner and outer motors are shared. This arrangement makes the overall structure of the two motors compact with a small radial dimension, solving or improving the problem in related technologies where hybrid architectures occupy a large amount of vehicle space, hindering space saving in the vehicle interior. Furthermore, it should be noted that the inner and outer motors sharing a yoke in this solution differ from motors sharing a single stator. In motors sharing a yoke, the magnetic fields of the two motors are decoupled, allowing them to operate independently. Simultaneously, since the outer motor in this application is a permanent magnet motor and the inner motor is an induction motor, they do not generate magnetic circuit interference. If both the inner and outer motors were permanent magnet motors, magnetic circuit interference would occur, leading to unstable operation of both motors. In addition, the permanent magnet rotor in this application is located on the outer side, which can be used as a generator connected to the engine. Since the outermost rotor has the largest diameter and the largest magnetic field area, it generates the most electricity, making it suitable for use as a generator.

[0011] According to the conjugate motor provided by this utility model, the outer rotor is provided with an engine connection part for transmission connection with the output shaft of the engine;

[0012] The inner rotor is provided with a gearbox connection part for transmission connection with the input shaft of the gearbox.

[0013] Beneficial effects:

[0014] In this design, the outer rotor is connected to the engine, which drives the outer rotor to rotate, thus enabling the external motor to generate electricity. Because the outer rotor in this design is a permanent magnet rotor, and the permanent magnet rotor is located on the outermost side, the outermost rotor has the largest diameter and the largest magnetic field area, resulting in the largest power generation, making it suitable for use as a generator.

[0015] According to the conjugate motor provided by this utility model, the inner rotor is a squirrel-cage rotor.

[0016] Beneficial effects:

[0017] The squirrel-cage rotor is an induction motor rotor, which does not produce magnetic circuit interference with the permanent magnet rotor. The magnetic fields of the two are decoupled and can operate independently without mutual interference. For example, the inner and outer rotors can operate simultaneously or independently without mutual interference.

[0018] According to the conjugate motor provided by this utility model, the outer rotor includes a Halbach magnet array, and the magnetically focused side of the Halbach magnet array faces the outer stator.

[0019] Beneficial effects:

[0020] In this design, the magnets of the outer rotor are distributed using a Halbach magnet array, with the magnetizing side of the Halbach magnet array facing the outer stator. The Halbach array, through the alternating magnetization directions of the magnets, concentrates the magnetic field lines on the outer stator side, effectively increasing the air gap magnetic flux density, typically reaching 1.5-2 times that of traditional radial magnetization. The magnetic ring of the Halbach rotor is composed of multiple magnets spliced ​​together, achieving a reduction in the number of magnets required for the same magnetic field strength through the magnetizing effect.

[0021] According to the conjugate motor provided by this utility model, the common yoke of the inner stator and the outer stator is a ring structure;

[0022] The outer stator includes a plurality of outer stator teeth, which are arranged circumferentially along the outer stator and connected to the outer peripheral side of the yoke.

[0023] The inner stator includes a plurality of inner stator teeth, which are arranged circumferentially along the inner stator and connected to the inner circumferential side of the yoke.

[0024] The outer stator teeth and / or the inner stator teeth are made of grain-oriented silicon steel.

[0025] Beneficial effects:

[0026] In this design, the outer stator teeth and / or inner stator teeth are made of grain-oriented silicon steel. Grain-oriented silicon steel has a high permeability, typically reaching 25 mH / m (1.8 times that of non-oriented silicon steel), allowing for good matching with the circumferential magnetic circuit of the stator teeth. The outer stator teeth receive the magnetic field from the Halbach array of the outer rotor, while the inner stator teeth couple with the magnetic field of the inner rotor. This bidirectional magnetic circuit is closed through the annular yoke, effectively increasing the air gap magnetic flux density. For example, the air gap magnetic flux density can be increased to 1.8T (compared to 1.5T for traditional non-oriented silicon steel), thereby increasing the motor torque density from 15 Nm / kg to 21 Nm / kg for the same volume. Furthermore, the high saturation magnetic induction of grain-oriented silicon steel allows the motor to maintain linear magnetic characteristics under high loads. Simultaneously, the uniform circumferential distribution of the annular yoke and the inner and outer stator teeth, combined with the high permeability of grain-oriented silicon steel, reduces the magnetic flux density distribution deviation in the yoke, avoiding hotspot problems caused by local magnetic saturation. Moreover, by utilizing the high magnetic permeability of oriented silicon steel, the thickness of the yoke can be significantly reduced (from 8mm in the traditional design to 6mm). Combined with the closed magnetic circuit of the ring structure, the magnetic flux density of the yoke is controlled below 1.5T to avoid saturation.

[0027] The conjugate motor provided by this utility model also includes a cooling system, the cooling system including a cooling channel disposed in the yoke, the cooling channel being used to introduce coolant.

[0028] Beneficial effects:

[0029] The yoke, serving as the common carrier for the inner and outer stator magnetic circuits, bears the main responsibility for heat conduction between the stator teeth and windings. Cooling channels are embedded in the yoke, increasing the contact area between the coolant (water or oil) and the yoke, thus enabling effective and rapid heat dissipation and maintaining high motor efficiency.

[0030] A second aspect of this utility model provides a drive system, including an engine, a gearbox, and a conjugate motor as described in any one of the above.

[0031] The engine is connected to the outer rotor via a transmission.

[0032] The gearbox is connected to the inner rotor drive.

[0033] Beneficial effects:

[0034] The drive system provided in this solution has an engine and an outer rotor connected by a transmission. That is, the engine drives the outer rotor to rotate, putting the outer motor in generator mode. As a generator, the outer motor has a larger magnetic field area and can achieve higher power generation efficiency. The inner rotor is connected to the gearbox by a transmission, meaning the inner motor is used as a drive motor to output power. Because the drive system provided by this invention uses the aforementioned conjugate motor as both a generator and a drive motor, the overall motor architecture is compact, which is beneficial for meeting the space requirements of the vehicle interior.

[0035] According to the drive system provided by this utility model, the engine and the outer rotor are connected by a first gear transmission system.

[0036] The first gear transmission system includes:

[0037] The first gear ring is connected to the output shaft of the engine;

[0038] The first gear is connected to the input shaft of the outer rotor. The first gear is disposed inside the first gear ring and meshes with the first gear ring.

[0039] Alternatively, the first gear transmission system includes:

[0040] The first gear is connected to the input shaft of the outer rotor;

[0041] The second gear is connected to the output shaft of the engine and meshes with the first gear;

[0042] A fixed gear ring, wherein the second gear is disposed within the fixed gear ring and meshes with the fixed gear ring.

[0043] A third aspect of this utility model provides a vehicle, including a power battery, a control system, and the aforementioned drive system, wherein the external motor and the internal motor are electrically connected to the power battery.

[0044] According to the vehicle provided by this utility model, the control mode of the control system includes at least:

[0045] The first control module controls the engine to drive the external motor to a power generation state in order to charge the power battery;

[0046] And / or a second control mode, controlling the power battery to supply electrical energy to the internal motor, and the internal motor outputs power through the gearbox;

[0047] And / or a third control mode, controlling the engine to drive the external motor in a power generation state to charge the power battery, while controlling the power battery to supply electrical energy to the internal motor so that the internal motor outputs power through the gearbox. Attached Figure Description

[0048] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0049] Figure 1 This is a partial internal schematic diagram of the conjugate motor according to an embodiment of the present invention;

[0050] Figure 2 This is a schematic diagram of a magnet array according to an embodiment of the present invention;

[0051] Figure 3 This is a schematic diagram of the external stator teeth according to an embodiment of the present invention;

[0052] Figure 4 This is a schematic diagram of the transmission structure of a drive system according to an embodiment of the present utility model;

[0053] Figure 5 This is a schematic diagram of another drive system transmission structure according to an embodiment of the present utility model.

[0054] Explanation of reference numerals in the attached figures:

[0055] 11. External motor; 111. External rotor; 1111. Halbach magnet array; 112. External stator; 1121. External stator teeth; 12. Internal motor; 121. Internal stator; 122. Internal rotor; 13. Yoke; 14. Engine; 15. Gearbox; 16. First gear ring; 17. First gear; 18. Second gear; 19. Fixed gear ring. Detailed Implementation

[0056] 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 embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0057] like Figure 1 As shown, this utility model embodiment provides a conjugate motor, including an outer motor 11 and an inner motor 12. The outer motor 11 includes an outer rotor 111 and an outer stator 112, and the inner motor 12 includes an inner rotor 122 and an inner stator 121.

[0058] The outer rotor 111, outer stator 112, and inner stator 121 are each in a ring structure, and the outer rotor 111, outer stator 112, inner stator 121, and inner rotor 122 are arranged sequentially from the outside to the inside. The outer stator 112 and inner stator 121 share a yoke 13. Thus, the inner motor 12 and the outer motor 11 are a whole, and the outer rotor 111, outer stator 112, inner stator 121, and inner rotor 122 are arranged radially from the outside to the inside.

[0059] It should be noted that in the motor structure, the yoke 13 is an important component of the magnetic circuit, whose main function is to support the magnetic poles and provide a closed path for the magnetic flux. It is usually made of a material with good magnetic permeability (such as silicon steel sheet), which can guide the magnetic lines of force to form an efficient magnetic circuit inside the motor.

[0060] In addition, in this embodiment, the outer motor 11 is a permanent magnet motor and the inner motor 12 is an induction motor. That is, the outer rotor 111 has a built-in permanent magnet (such as neodymium iron boron) and does not require excitation current; while the inner rotor 122 of the inner motor 12 generates current and magnetic field through electromagnetic induction.

[0061] In summary, the conjugate motor provided in this embodiment includes an outer motor 11 and an inner motor 12. The inner motor 12 and the outer motor 11 are radially nested together, that is, the outer rotor 111 and outer stator 112 of the outer motor 11, and the inner stator 121 and inner rotor 122 of the inner motor 12 are sequentially nested together radially from the outside to the inside, and the inner motor 12 and the outer motor 11 share a yoke 13. This arrangement makes the overall structure of the two motors compact and the radial dimension small, which can solve or improve the problem in related technologies where hybrid architecture occupies a lot of vehicle space and is not conducive to saving interior space.

[0062] In addition, it should be noted that the inner and outer motors sharing the yoke 13 in this scheme are different from motors sharing a stator. In motors sharing the yoke 13, the magnetic fields of the two motors are decoupled from each other and can operate independently.

[0063] Meanwhile, since the external motor 11 in this embodiment is a permanent magnet motor and the internal motor 12 is an induction motor, the two will not generate magnetic circuit interference. If both the external and internal motors were permanent magnet motors, magnetic circuit interference would occur, leading to unstable operation of both motors.

[0064] Furthermore, in this embodiment, the permanent magnet rotor is located on the outer side, which can be used as a generator connected to the engine 14. Since the outermost rotor has the largest diameter and the largest magnetic field area, it generates the most electricity and is suitable for use as a generator.

[0065] In a further embodiment, the outer rotor 111 is provided with an engine connection portion for driving connection with the output shaft of the engine 14. For example, the engine connection portion may be a ring or flange type component, with one end fixedly connected to the outer rotor 111 and the other end drivingly connected to the output shaft of the engine 14 through a coupling, spline or bolt.

[0066] The inner rotor 122 is provided with a gearbox connection part for driving connection with the input shaft of the gearbox 15. For example, the gearbox connection part can be a coupling, spline or other components to achieve connection with the input shaft of the gearbox 15.

[0067] In this design, the outer rotor 111 is connected to the engine 14, which drives the outer rotor 111 to rotate, thus realizing the power generation function of the outer motor 11. Since the outer rotor 111 is a permanent magnet rotor, and the permanent magnet rotor is located on the outermost side, the outermost rotor has the largest diameter and the largest magnetic field area, resulting in the largest power generation, making it suitable for use as a generator.

[0068] In some embodiments, the inner rotor 122 is a squirrel-cage rotor. The squirrel-cage rotor is an induction motor rotor, which does not produce magnetic circuit interference with the permanent magnet rotor. The magnetic fields of the two are decoupled from each other and can operate independently without mutual interference. For example, the inner rotor 122 and the outer rotor 111 can operate simultaneously or independently without mutual interference.

[0069] Of course, in other embodiments, the inner rotor 122 can also be an induction rotor of other structures, such as a wound rotor, which will not be described in detail here.

[0070] In some embodiments, such as Figure 2 As shown, the outer rotor 111 includes a Halbach magnet array 1111, with the magnetizing side of the Halbach magnet array 1111 facing the outer stator 112.

[0071] In this embodiment, the magnets of the outer rotor 111 are distributed using a Halbach magnet array 1111, with the magnetizing side of the Halbach magnet array 1111 facing the outer stator 112. The Halbach array, through the alternating magnetization directions of the magnets, concentrates the magnetic field lines on the outer stator 112 side, effectively increasing the air gap magnetic flux density, typically reaching 1.5-2 times that of conventional radial magnetization. The magnetic ring of the Halbach rotor is composed of multiple magnets spliced ​​together, achieving a reduction in the amount of magnets used for the same magnetic field strength through the magnetizing effect.

[0072] In other embodiments, the magnets of the outer rotor 111 may be arranged in other forms. For example, the magnetization direction of the magnets may be along the radial direction of the rotor, that is, from the center of the rotor to the circumference or from the circumference to the center; or the magnetization directions of the magnets may be parallel to each other, usually arranged along the circumference of the rotor; or the magnetization direction of the magnets may be along the tangential direction of the rotor, and the magnetization directions of adjacent magnets may be opposite; or a combination of the above arrangements may be used, which will not be described in detail here.

[0073] In a further embodiment, the yoke 13 shared by the inner stator 121 and the outer stator 112 has an annular structure; the outer stator 112 includes a plurality of outer stator teeth 1121, which are arranged circumferentially along the outer stator 112 and connected to the outer periphery of the yoke 13. The structure of each outer stator tooth 1121 can be as follows: Figure 3 As shown; the inner stator 121 includes a plurality of inner stator teeth (not shown in the figure), the plurality of inner stator teeth are arranged circumferentially along the inner stator 121, and the plurality of inner stator teeth are connected to the inner circumferential side of the yoke 13; the material of the outer stator teeth 1121 and / or the inner stator teeth is oriented silicon steel.

[0074] In this embodiment, the outer stator teeth 1121 and / or the inner stator teeth are made of grain-oriented silicon steel. Grain-oriented silicon steel has a high permeability, typically reaching 25 mH / m (1.8 times that of non-oriented silicon steel), which allows for better matching with the circumferential magnetic circuit of the stator teeth. The outer stator teeth 1121 receive the magnetic field from the focusing side of the Halbach array of the outer rotor, while the inner stator teeth couple the magnetic field of the inner rotor 122. The bidirectional magnetic circuit is closed through the annular yoke 13, which can effectively increase the air gap magnetic flux density. For example, the air gap magnetic flux density can be increased to 1.8T (compared to 1.5T for traditional non-oriented silicon steel), thereby increasing the motor torque density from 15 Nm / kg to 21 Nm / kg for the same volume.

[0075] Furthermore, the high saturation magnetic induction intensity of grain-oriented silicon steel allows the motor to maintain linear magnetic characteristics under high loads. Simultaneously, the circumferentially uniform distribution of the annular yoke 13 and the inner and outer stator teeth 1121, combined with the high magnetic permeability of the grain-oriented silicon steel, reduces the magnetic flux density distribution deviation of the yoke 13, avoiding hotspot problems caused by localized magnetic saturation.

[0076] Moreover, by utilizing the high permeability of oriented silicon steel, the thickness of the yoke 13 can be significantly reduced (from 8mm in the traditional design to 6mm). Combined with the closed magnetic circuit of the ring structure, the magnetic flux density of the yoke 13 is controlled below 1.5T to avoid saturation.

[0077] In a further embodiment, the conjugate motor also includes a cooling system, which includes a cooling channel (not shown) disposed within the yoke 13 for introducing coolant.

[0078] The yoke 13 serves as the common carrier of the magnetic circuits of the inner and outer stators 112, and undertakes the main heat conduction between the stator teeth and the windings. The cooling channel is embedded in the yoke 13, so that the contact area between the coolant (water or oil) and the yoke 13 is large, thereby effectively and quickly dissipating heat from the yoke 13 and keeping the motor at a high working efficiency.

[0079] This utility model embodiment also provides a drive system, including an engine 14, a gearbox 15, and a conjugate motor as described in any of the above embodiments; wherein the engine 14 is driven to the outer rotor 111, and the gearbox 15 is driven to the inner rotor 122.

[0080] In the drive system provided in this embodiment, the engine 14 is driven by the outer rotor 111, meaning the engine 14 drives the outer rotor 111 to rotate, putting the outer motor 11 into power generation mode. The outer motor 11, acting as a generator, has a larger magnetic field area and thus higher power generation efficiency. The inner rotor 122 is driven by the gearbox 15, meaning the inner motor 12 is used as a drive motor to output power. Because the drive system provided in this embodiment uses the aforementioned conjugate motor as both a generator and a drive motor, the overall motor architecture is compact, which is beneficial for meeting the space requirements of the vehicle interior.

[0081] In the drive system provided in this embodiment, the engine 14 and the outer rotor 111 are connected by a first gear transmission system. In one embodiment, such as... Figure 4 As shown, the first gear transmission system may include a first gear ring 16 and a first gear 17; wherein, the first gear ring 16 is connected to the output shaft of the engine 14, the first gear 17 is connected to the input shaft of the outer rotor 111, and the first gear 17 is disposed inside the first gear ring 16 and meshes with the first gear ring 16.

[0082] With this configuration, when the engine 14 needs to drive the outer rotor 111 to rotate, its transmission route can be as follows: engine 14 → first gear ring 16 → first gear 17 → outer rotor 111. The first gear 17 is located inside the first gear ring 16, which has a compact structure, saves space, and provides smooth transmission with low noise.

[0083] In another embodiment, such as Figure 5 As shown, the aforementioned first gear transmission system may also include a first gear 17, a second gear 18, and a fixed gear ring 19. The first gear 17 is connected to the input shaft of the outer rotor 111, and the second gear 18 is connected to the output shaft of the engine 14 and meshes with the first gear 17. The second gear 18 is disposed within the fixed gear ring 19 and meshes with it.

[0084] With this configuration, when the engine 14 needs to drive the outer rotor 111 to rotate, its transmission route can be as follows: engine 14 → second gear 18 → first gear 17 → outer rotor 111. Since the second gear 18 is located inside the fixed gear ring 19 and meshes with the fixed gear ring 19, the second gear 18 can be guaranteed to have good stability.

[0085] Another embodiment of this utility model provides a vehicle, including a power battery, a control system, and the drive system described in the above embodiment. An external motor 11 and an internal motor 12 are electrically connected to the power battery. The engine 14 can drive the external motor 11 to generate electricity, and the electricity generated by the external motor 11 is input to the power battery for energy storage. The power battery can also output electrical energy to the internal motor 12, driving the internal motor 12 to rotate, thereby propelling the vehicle.

[0086] In a further embodiment, the control mode of the control system includes at least one of a first control module, a second control module, and a third control module.

[0087] The first control module controls the engine 14 to drive the external motor 11 into a power generation state to charge the power battery. In this mode, only the external motor 11 can operate, and it is in a power generation state. The external rotor 111 rotates, and the external stator 112 cuts the magnetic field lines generated by the permanent magnet to generate a back electromotive force. This back electromotive force is fed to the controller through the conventional system and then charged to the power battery by DC-DC conversion. The main magnetic circuit passes through the yoke 13 shared by the stator and forms a loop through the external rotor 111.

[0088] The second control mode is used to control the power battery to supply electrical energy to the inner motor 12, and the inner motor 12 outputs power through the gearbox 15. In this mode, only the inner motor 12 can work between the inner motor 12 and the outer motor 11. At this time, it is in driving state. Three-phase alternating current is passed through the inner stator 121 to generate a rotating magnetic field, which cuts the copper bars of the inner rotor 122 to induce current. The armature in the air gap works together to generate torque. The main magnetic circuit will pass through the stator common yoke 13 and form a loop through the inner rotor.

[0089] The third control mode is used to control the engine 14 to drive the external motor 11 in a power generation state to charge the power battery, and at the same time control the power battery to supply electrical energy to the internal motor 12 so that the internal motor 12 can output power through the gearbox 15. When the inner and outer rotors 111 work together, it is both a power generation state and a driving state, and the inner and outer motors share the stator yoke 13 as a magnetic circuit channel.

[0090] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A conjugate motor, characterized in that, It includes an external motor (11) and an internal motor (12), wherein the external motor (11) includes an external rotor (111) and an external stator (112), and the internal motor (12) includes an internal rotor (122) and an internal stator (121); The outer rotor (111), the outer stator (112), the inner stator (121) and the inner rotor (122) are arranged sequentially from the outside to the inside, and the outer stator (112) and the inner stator (121) share a yoke (13); The external motor (11) is a permanent magnet motor, and the internal motor (12) is an induction motor.

2. The conjugate motor according to claim 1, characterized in that, The outer rotor (111) is provided with an engine connection part for transmission connection with the output shaft of the engine (14); The inner rotor (122) is provided with a gearbox connection part for transmission connection with the input shaft of the gearbox (15).

3. The conjugate motor according to claim 1, characterized in that, The inner rotor (122) is a squirrel cage rotor.

4. The conjugate motor according to claim 1, characterized in that, The outer rotor (111) includes a Halbach magnet array (1111), the magnetically focused side of which faces the outer stator (112).

5. The conjugate motor according to claim 1, characterized in that, The yoke (13) shared by the inner stator (121) and the outer stator (112) is a ring structure; The outer stator (112) includes a plurality of outer stator teeth (1121), which are arranged circumferentially along the outer stator (112) and connected to the outer peripheral side of the yoke (13); The inner stator (121) includes a plurality of inner stator teeth, which are arranged circumferentially along the inner stator (121) and connected to the inner circumferential side of the yoke (13); The outer stator teeth (1121) and / or the inner stator teeth are made of oriented silicon steel.

6. The conjugate motor according to claim 1, characterized in that, It also includes a cooling system, which includes a cooling channel disposed within the yoke (13) for introducing coolant.

7. A drive system, characterized in that, Includes an engine (14), a gearbox (15), and a conjugate motor as described in any one of claims 1-6; The engine (14) is connected to the outer rotor (111) in a transmission connection. The gearbox (15) is connected to the inner rotor (122) in a transmission connection.

8. The drive system according to claim 7, characterized in that, The engine (14) and the outer rotor (111) are connected by a first gear transmission system; The first gear transmission system includes: The first gear ring (16) is connected to the output shaft of the engine (14); The first gear (17) is connected to the input shaft of the outer rotor (111). The first gear (17) is disposed inside the first gear ring (16) and meshes with the first gear ring (16). Alternatively, the first gear transmission system includes: The first gear (17) is connected to the input shaft of the outer rotor (111); The second gear (18) is connected to the output shaft of the engine (14) and meshes with the first gear (17); A fixed gear ring (19) is provided, and the second gear (18) is disposed inside the fixed gear ring (19) and meshes with the fixed gear ring (19).

9. A vehicle, characterized in that, It includes a power battery, a control system, and a drive system as described in claim 7 or 8, wherein the external motor (11) and the internal motor (12) are electrically connected to the power battery.

10. The vehicle according to claim 9, characterized in that, The control modes of the control system include at least: The first control module controls the engine (14) to drive the external motor (11) to a power generation state in order to charge the power battery; And / or the second control mode, control the power battery to supply electrical energy to the internal motor (12), and the internal motor (12) outputs power through the gearbox (15); And / or the third control mode, control the engine (14) to drive the external motor (11) to generate electricity to charge the power battery, and control the power battery to supply electrical energy to the internal motor (12) so that the internal motor (12) outputs power through the gearbox (15).

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