Motor, power system and extended-range vehicle

Abstract

The invention provides a motor, a power system and an extended-range vehicle, and belongs to the technical field of new energy. The motor comprises a motor shell, an inner rotor, an inner stator, an outer stator and an outer rotor; the inner rotor, the inner stator, the outer rotor and the outer stator are all located in the motor shell, the inner rotor is sleeved with the inner stator, the inner stator is sleeved with the outer stator, and the outer stator is sleeved with the outer rotor; the outer rotor is connected with an engine of a vehicle, and the inner rotor is used for being in transmission connection with wheels of the vehicle. The motor integrates the motor and the generator, the motor with high integration degree is arranged in a vehicle, the arrangement space of the vehicle is saved, other devices in the vehicle are easy to arrange, the motor is applied to a rear-drive extended-range vehicle, the extended-range vehicle can become a four-wheel-drive vehicle, and the service life of the rear-drive extended-range vehicle is prolonged. The four-driving-force configuration has the advantages of being compact in structure and low in cost.

Description

Technical Field

[0001] This application relates to the field of new energy technologies, and particularly to an electric motor, a power system, and a range-extended vehicle. Background Art

[0002] Range-extended vehicles are deeply favored by the market because they combine the driving and handling characteristics of pure electric vehicles and the range advantages of fuel vehicles, and have become one of the important branches of new energy vehicles.

[0003] Current range-extended sedans need to arrange an electric motor for driving the wheels, a generator for generating electricity, and an engine (i.e., internal combustion engine) for driving the generator to generate electricity. These devices also occupy a relatively large space in the sedan, making it difficult to arrange other structural components in the range-extended sedan. Summary of the Invention

[0004] This application provides an electric motor, a power system, and a range-extended vehicle. The electric motor integrates a generator and an electric motor, with a high degree of integration, which can save the layout space in the vehicle, thus facilitating the layout of other components in the vehicle.

[0005] In a first aspect, this application provides an electric motor, which includes a motor housing, an inner rotor, an inner stator, an outer stator, and an outer rotor;

[0006] The inner rotor, the inner stator, the outer rotor, and the outer stator are all located in the motor housing, and the inner stator is sleeved outside the inner rotor, the outer stator is sleeved outside the inner stator, and the outer rotor is sleeved outside the outer stator;

[0007] The outer rotor is used to connect to the engine of the vehicle where it is located, and the inner rotor is used to be in transmission connection with the wheels of the vehicle where it is located.

[0008] In the solution shown in this application, the electric motor includes an inner electric motor formed by the inner rotor and the inner stator, and an outer electric motor formed by the outer rotor and the outer stator. Among them, the outer rotor is used to be in transmission connection with the engine. Then, the outer electric motor generates electricity under the drive of the engine. Thus, the outer electric motor serves as a generator. The inner rotor is used to be in transmission connection with the wheels. Then, the inner electric motor can drive the vehicle to travel. Thus, the inner electric motor serves as an electric motor. It can be seen that this electric motor integrates the generator and the electric motor together, with a high degree of integration. The electric motor with a high degree of integration arranged in the vehicle is beneficial to saving the layout space of the vehicle and facilitating the layout of other components in the vehicle. This electric motor with a high degree of integration is particularly suitable for small vehicles.

[0009] Moreover, since the motor integrates a generator and a motor, and the generator needs to be driven by an engine, the generator and the engine are in close proximity. As the engine is generally arranged at the front of the vehicle, such as in the front engine compartment, the motor is arranged at the front of the vehicle. Then, another motor can be arranged at the rear of the vehicle as a rear-wheel drive motor, making the vehicle a four-wheel drive vehicle. This four-wheel drive power configuration has the advantages of compact structure and low cost.

[0010] In a possible implementation, both the inner stator and the outer stator are fixed to the motor housing by shrink fitting or bolts. The stator winding of the inner stator faces the inner rotor, and the stator winding of the outer stator faces the outer rotor.

[0011] In the solution shown in the present application, the convex ring of the motor housing can shrink-fit and overwrap the inner stator, and the outer stator can also shrink-fit and overwrap the convex ring of the motor housing. Thus, the inner stator is fixed on the inner ring of the convex ring, and the outer stator is fixed on the outer ring of the convex ring. The inner stator and the outer stator are assembled on the motor housing by this shrink-fit method, which can ensure a sufficient interference value and high reliability.

[0012] In the solution shown in the present application, the outer stator forming the generator and the inner stator forming the motor are fixed to the motor housing by bolts. This fixing method is convenient for disassembly and is conducive to modular assembly. Then, in the power configuration of a range-extended vehicle, when a front-wheel drive needs to be configured, only the inner rotor and the inner stator need to be assembled inside the outer stator. When a front-wheel drive does not need to be configured, there is no need to assemble the inner rotor and the inner stator, or the assembled inner rotor and inner stator can be disassembled. This modular assembly method is conducive to flexibly choosing whether to assemble according to the power configuration requirements.

[0013] In a possible implementation, the stator core of the inner stator has a plurality of first lugs protruding outward from the ring, and the plurality of first lugs are arranged along the circumferential direction. The stator core of the outer stator has a plurality of second lugs protruding inward from the ring, and the plurality of second lugs are arranged along the circumferential direction;

[0014] The motor housing has a convex ring. The inner stator is located inside the ring of the convex ring, and the first lugs are fixed to the convex ring by bolts. The outer stator is located outside the ring of the convex ring, and the second lugs are fixed to the convex ring by bolts.

[0015] In the solution shown in the present application, the first lug of the inner stator has a screw hole, and the convex ring of the motor housing has a screw hole, so that the inner stator is fixedly connected to the motor housing by bolts. The second lug of the outer stator has a screw hole, and the convex ring has a screw hole, and the outer stator is fixedly connected to the motor housing by bolts. It can be seen that the fixing method between the inner stator and the motor housing, and between the outer stator and the motor housing is simple, easy to disassemble, and conducive to flexible adjustment of the power configuration of the vehicle.

[0016] In a possible implementation, the magnetic steel of the outer rotor is attached to the surface of the rotor body facing the outer stator.

[0017] In the solution shown in the present application, the surface-mounted permanent magnet has a high utilization rate of the magnetic steel, good heat dissipation and low manufacturing cost compared to the embedded permanent magnet.

[0018] In a possible implementation, the outer rotor is connected to the engine of the vehicle through a gear train, or the outer rotor is directly connected to the crankshaft of the engine of the vehicle.

[0019] In a possible implementation, the motor further includes a motor controller, and the motor controller is electrically connected to the stator winding of the inner stator and the stator winding of the outer stator respectively.

[0020] In the scheme shown in this application, the motor controller analyzes the driving and power generation needs of the entire vehicle. When power generation is required, the outer rotor is controlled to start the engine. After the engine is started, the outer rotor is driven to rotate, and the outer stator outputs electrical energy to the battery pack. When driving is required, the inner rotor is controlled to rotate to drive the wheels.

[0021] In a possible implementation, the motor housing is made of silicon steel.

[0022] In the solution shown in the present application, the material of the motor housing is silicon steel material, which can shield the electromagnetic radiation generated by the high-voltage wiring harness in the motor and prevent the conductive thin plate of the car body from generating vibration noise due to electromagnetic force.

[0023] In a possible implementation manner, the inner wall of the motor housing has a damping structure.

[0024] In the solution shown in the present application, the inner wall of the motor housing has a damping structure, which further attenuates the vibration of the high-voltage wire harness in the motor and also reduces the vibration noise caused by the high-voltage wire harness vibration being transmitted to the vehicle body through the fixing bracket.

[0025] In a second aspect, the present application provides a power system, which includes an engine and a motor including an inner motor and an outer motor as described in the first aspect, wherein the outer rotor of the motor is drivingly connected to the engine.

[0026] In a third aspect, a range-extended vehicle is provided. The range-extended vehicle includes the power system described in the second aspect, and the inner rotor of the power system is drivingly connected to the wheels of the range-extended vehicle.

[0027] In a possible implementation, the range-extended vehicle further includes a rear-wheel drive motor, the rear-wheel drive motor is drivingly connected to the rear wheels of the range-extended vehicle, and the inner rotor of the motor is drivingly connected to the front wheels of the range-extended vehicle.

[0028] In the solution shown in the present application, the arrangement of disposing the dual motor including a generator and a motor described in the first aspect in the front of the vehicle and disposing the rear-wheel drive motor in the rear of the vehicle makes the vehicle a four-wheel drive vehicle. This four-wheel drive power configuration has the advantages of compact structure and low cost. Description of the Drawings

[0029] Figure 1 is an axial cross-sectional view of a motor provided by an exemplary embodiment of the present application;

[0030] Figure 2 is a radial cross-sectional view of a motor provided by an exemplary embodiment of the present application;

[0031] Figure 3 is a radial cross-sectional view of a motor provided by an exemplary embodiment of the present application.

[0032] Description of the Reference Numerals

[0033] 1. Motor housing; 11. Convex ring.

[0034] 2. Inner rotor; 3. Inner stator; 31. First lug; 4. Outer stator; 41. Second lug; 5. Outer rotor.

[0035] 10. Motor; 20. Engine; 30. Front wheel; 40. Transmission; 50. Motor controller; 60. Battery pack. Detailed Embodiments

[0036] To make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the drawings.

[0037] This embodiment relates to a motor, which can be applied to a range-extended vehicle. A range-extended vehicle is a vehicle that, on the basis of a pure electric vehicle, adds an engine (also called an internal combustion engine) to charge the power battery or directly drive the motor to increase the driving range. Range-extended cars and range-extended electric vehicles are all relatively common range-extended vehicles.

[0038] Most of the current range-extended vehicles have the problems of low integration level and large space occupation in the vehicle layout. For example, for a range-extended sedan with a front-wheel drive mode, the front of the vehicle needs to be arranged with an engine, a generator, and a motor. However, the sizes of these components are relatively large, resulting in a large layout space occupied in the front part of the vehicle, which is not conducive to the layout of other components.

[0039] Therefore, most of the current range-extended sedans adopt a rear-wheel drive mode. The motor is arranged at the rear of the vehicle, and the engine and the generator are arranged at the front of the vehicle to save the layout space of the vehicle.

[0040] This embodiment provides a motor, which is a dual-motor that integrates a generator and a motor with a high integration level. Such a motor with a high integration level, when applied to a range-extended vehicle, especially to a range-extended sedan, can save the layout space.

[0041] In addition, since the motor integrates a generator and a motor, and the generator needs to be driven by the engine, the generator and the engine are adjacent in position. Generally, the engine is arranged at the front of the vehicle, such as in the front engine compartment. Therefore, when the motor is arranged at the front of the vehicle, another motor can be arranged at the rear of the vehicle as a rear-wheel drive motor, making the vehicle a four-wheel drive vehicle. This four-wheel drive power configuration has the advantages of compact structure and low cost.

[0042] In addition, the motor of the motor is assembled on the generator in a detachable manner, that is, the generator and the motor of the motor are detachable. Then, the motor can be flexibly configured between a pure generator and a hybrid motor (the hybrid motor includes a generator and a motor). For example, during the assembly of the motor, if the motor is applied to a rear-wheel drive range-extended vehicle, since there is already a motor to drive the vehicle, the motor does not need to be assembled on the generator, and then the motor is a pure generator. Of course, in this case, the motor can also be assembled on the generator to make the motor a hybrid motor and applied to a range-extended vehicle, and the range-extended vehicle is a four-wheel drive vehicle. Another example is that if the motor is applied to a front-wheel drive range-extended vehicle, the motor needs to be assembled on the generator to make the motor a hybrid motor including a motor and a generator.

[0043] The features of the motor will be introduced below. It should be noted that unless otherwise specified in the text, the vehicle mentioned refers to a range-extended vehicle.

[0044] As Figure 1 and Figure 2 shown is the structural schematic diagram of the power system. Among them, Figure 1 is the axial sectional schematic diagram of the power system, Figure 2 is the radial sectional schematic diagram of the power system.

[0045] For a single motor, since a motor is an electromagnetic device that realizes the conversion or transmission of electrical energy based on the law of electromagnetic induction, the structure of a single motor mainly includes a stator and a rotor. The stator is stationary relative to the motor housing, and the rotor rotates relative to the motor housing. Among them, the stator includes a stator core and a stator winding. The stator winding is wound around the stator core, and the stator winding is used for wiring.

[0046] The motor shown in this embodiment is a dual motor. Therefore, referring to Figure 1 as shown, the motor 10 includes a motor housing 1, two rotors and two stators. The two rotors and two stators are all installed in the same motor housing 1. Among them, the rotors are rotatably installed in the motor housing, and the stators are fixedly installed in the motor housing.

[0047] Referring to Figure 2 as shown, the rotor and the stator are in a cylindrical structure. One rotor is sleeved inside the other rotor. For easy distinction, referring to Figure 1 as shown, the rotor sleeved outside is denoted as the outer rotor 5, and the rotor inside is denoted as the inner rotor 2. Similarly, the two stators are also one stator sleeved outside the other stator. For easy distinction, the stator sleeved outside is denoted as the outer stator 4, and the stator inside is denoted as the inner stator 3.

[0048] Continuing to refer to Figure 1 and Figure 2 as shown, the inner stator 3 and the outer stator 4, as the stator assembly, are located between the inner rotor 2 and the outer rotor 5. Referring to Figure 2 as shown, the stator winding of the inner stator 3 faces the inner rotor 2, and the inner rotor 2 and the inner stator 3 form a motor (denoted as the inner motor). Referring to Figure 2 as shown, the stator winding of the outer stator 4 faces the outer rotor 5, and the outer stator 4 and the outer rotor 5 form another motor (denoted as the outer motor).

[0049] Continuing to refer to Figure 1 as shown, the outer rotor 5 is drivingly connected to the engine 20. Then, the outer motor formed by the outer rotor 5 and the outer stator 4 serves as a generator for generating electricity. The inner rotor 2 is drivingly connected to the wheels of the vehicle where it is located. Then, the inner motor formed by the inner rotor 2 and the inner stator 3 serves as a motor (i.e., a drive motor) for driving the wheels to travel.

[0050] Referring to Figure 1 as shown, the outer rotor 5 and the outer stator 4 are closer to the wall of the motor housing 1 relative to the inner rotor 2 and the inner stator 3. Then, the outer rotor 5 and the outer stator 4 have a larger heat dissipation space and good heat dissipation performance.

[0051] In one example, the outer rotor 5 arranged in the outermost layer is more suitable for connection with the engine 20 for power generation. This is because, firstly, the outer rotor 5 is sleeved in the outermost layer, which makes the size of the outer rotor 5 larger and the required structural strength is also relatively high, resulting in the outer rotor 5 not having a very high rotation speed. The generator used for power generation does not need a large rotation speed, only thousands of rotation speeds are sufficient, while the electric motor used for driving requires a rotation speed of tens of thousands of revolutions. Therefore, from the perspective of rotation speed, the outer rotor 5 with a low rotation speed is more suitable for connection with the engine. Therefore, the outer motor formed by the outer rotor 5 and the outer stator 4 can be used as a generator, which is transmission-connected to the engine 20 and generates electricity under the drive of the engine 20.

[0052] Secondly, because the outer motor formed by the outer rotor 5 and the outer stator 4 is in the outer ring of the motor, its volume is relatively large, and it can be appropriately made larger. The larger the volume of the motor, the better the heat dissipation, which can increase the working power. Therefore, as a generator, it is beneficial to increase the power generation. The inner motor formed by the inner rotor 2 and the inner stator 3 is in the inner ring of the motor, and its volume is relatively small, and the volume is not easy to be too large. The small-volume inner motor has a small heat dissipation area, a weak heat dissipation effect, and it is difficult to increase the working power. Therefore, if the inner motor formed by the inner rotor 2 and the inner stator 3 is used as a generator for power generation, the increase in power generation will be limited. Therefore, from the perspective of increasing power generation, the outer motor formed by the outer rotor 5 and the outer stator 4 is also more suitable as a generator, which is connected to the engine 20 for power generation.

[0053] In one example, the outer motor formed by the outer rotor 5 and the outer stator 4, as a generator, can have its size determined according to the power generation demand, for example, the pole slot size, radial size and axial size of the outer motor can be determined according to the power generation demand. Similarly, for the inner motor formed by the inner rotor 2 and the inner stator 3, as a motor, its size can be determined according to the power demand, for example, the axial size and radial size of the inner motor can be determined according to the power demand.

[0054] In one example, the outer rotor 5 is connected to the engine 20, and the outer rotor 5 may be directly connected to the crankshaft of the engine 20. In another example, the outer rotor 5 may also be connected to the crankshaft of the engine 20 through a gear train for increasing speed.

[0055] In one example, the inner rotor 2 is connected to the wheel transmission. Since the engine is generally arranged in the front engine compartment, then, refer to Figure 1 As shown, the inner rotor 2 can be connected to the front wheel 30 by transmission. For example, the inner rotor 2 is connected to the front wheel 30 by transmission through the gearbox 40. Figure 1 As shown, the rotating shaft of the inner rotor 2 is connected to the gearbox 40 , and the gearbox 40 is connected to the rotating shaft of the front wheel 30 .

[0056] In one example, the inner motor formed by the inner rotor 2 and the inner stator 3, and the outer motor formed by the outer rotor 5 and the outer stator 4 can both be permanent magnet synchronous motors, which have the advantages of simple structure, small volume, high efficiency, high power factor, etc.

[0057] Among them, according to the different positions of the permanent magnets placed on the rotor, permanent magnet synchronous motors are usually divided into surface-mounted rotor structures and embedded rotor structures.

[0058] In one example, considering that the rotational speed of the outer rotor 5 is relatively low, generally not exceeding 5000 revolutions per minute, therefore, the permanent magnets of the outer rotor 5 can be surface-mounted. For example, the magnetic steel of the outer rotor 5 can be attached to the surface of the rotor body facing the outer stator 4. In this way, the outer motor formed by the outer rotor 5 and the outer stator 4 is specifically a surface-mounted permanent magnet synchronous motor. Compared with the embedded permanent magnets, this kind of surface-mounted permanent magnets has high utilization rate of magnetic steel, good heat dissipation and low manufacturing cost.

[0059] In one example, due to the relatively high rotational speed of the inner rotor 2, the permanent magnets of the inner rotor 2 can be embedded, that is, the magnetic steel of the inner rotor 2 is embedded in the rotor body.

[0060] In one example, the inner stator 3 and the outer stator 4 can be fixed to the motor housing 1 by bolts, or the inner stator 3 and the outer stator 4 can also be fixed to the motor housing 1 by shrink fit.

[0061] For example, after the stator core of the inner stator 3 is completed with winding nesting and insulation treatment, it can be fixedly connected to the motor housing 1 by bolts or shrink fit. Similarly, after the stator core of the outer stator 4 is completed with winding nesting and insulation treatment, it can also be fixedly connected to the motor housing 1 by bolts or shrink fit.

[0062] Among them, shrink fit is a fixing method that uses the principle of thermal expansion and contraction to achieve the purpose of interference fit. Because shrink fit is to heat and expand the containing part and then cool it, and the containing part shrinks to wrap the contained part, which can ensure sufficient interference value and high reliability.

[0063] As an example, the process of assembling the inner stator 3 and the outer stator 4 on the motor housing 1 by shrink fit can be as follows Figure 3 As shown, it is a schematic diagram of assembling the inner stator 3 and the outer stator 4 on the motor housing by shrink fit. Refer to Figure 3 As shown, the convex ring 11 of the motor housing 1, as the containing part, and the stator core of the inner stator 3 as the contained part. Then, during fixation, the convex ring 11 is heated to make it expand, and the expanded convex ring 11 encloses the stator core of the inner stator 3. After that, the convex ring 11 is cooled, and the cooled convex ring 11 shrinks, thus tightly wrapping the stator core of the inner stator 3.

[0064] Similarly, in the process of fixing the stationary outer stator 4, the outer stator 4 can be used as the containing part, and the convex ring 11 can be used as the contained part. During the fixing process, the outer stator 4 is heated to expand, and in the expanded state, the outer stator 4 encloses the convex ring 11. Then, the outer stator 4 is cooled, and the cooled outer stator 4 shrinks, thus tightly wrapping the convex ring 11.

[0065] As another example, an example is given where both the inner stator 3 and the outer stator 4 are fixedly connected to the motor housing 1 through bolts. Refer to Figure 2 As shown, the stator core of the inner stator 3 has a plurality of first lugs 31 protruding towards the outside of the ring. The plurality of first lugs 31 are arranged along the circumferential direction, such as being evenly arranged along the circumferential direction. Among them, Figure 2 two examples are given. Continuing to refer to Figure 2 As shown, each first lug 31 has a threaded hole.

[0066] Similarly, referring to Figure 2 As shown, the stator core of the outer stator 4 also has a plurality of second lugs 41 protruding towards the inside of the ring. The plurality of second lugs 41 are arranged along the circumferential direction, such as being evenly arranged along the circumferential direction. Figure 2 Two illustrations are given. Continuing to refer to Figure 2 As shown, each second lug 41 has a threaded hole.

[0067] Referring to Figure 2 As shown, the motor housing 1 has a convex ring 11, and the convex ring 11 also has a plurality of threaded holes. The inner stator 3 is located inside the ring of the convex ring 11, and the threaded holes of the first lugs 31 are in one-to-one position correspondence with the threaded holes of the convex ring 11, and the two are fixed by bolts. The outer stator 4 is located outside the ring of the convex ring 11, and the threaded holes of the second lugs 41 are in one-to-one position correspondence with the threaded holes of the convex ring 11, and the two are fixed by bolts.

[0068] This assembly method of fixing the inner stator 3 and the outer stator 4 to the motor housing 1 through bolts makes the outer motor formed by the outer rotor 5 and the outer stator 4 detachable from the inner motor formed by the inner rotor 2 and the inner stator 3, which is conducive to realizing modular assembly. For example, in the power configuration, if it is necessary to assemble the inner motor, only the inner rotor 2 and the inner stator 3 need to be assembled inside the outer stator 4. If it is not necessary to assemble the inner motor, there is no need to assemble the inner rotor 2 and the inner stator 3. Therefore, the motor shown in this embodiment is conducive to flexibly selecting whether to assemble the inner rotor 2 and the inner stator 3 according to the power configuration requirements.

[0069] In one example, referring to Figure 1 As shown, the motor further includes a motor controller 50. The inner motor formed by the inner rotor 2 and the inner stator 3 shares the motor controller 50 with the outer motor formed by the outer rotor 5 and the outer stator 4. For example, referring toFigure 1 As shown, the motor controller 50 is electrically connected to the stator windings of both the inner stator 3 and the outer stator 4. The motor controller 50 is also electrically connected to the battery pack 60, and the motor controller 50 analyzes the driving and power generation requirements of the entire vehicle.

[0070] For example, referring to Figure 1 As shown, when the engine 20 starts, the outer motor formed by the outer stator 4 and the outer rotor 5 acts as a starting motor to drive the engine 20 to start. Subsequently, the engine 20 operates to drive the outer motor to generate electricity, and the electric energy flows into the battery pack 60 through the motor controller 50. The battery pack 60 supplies power to the inner stator 3, prompting the inner rotor 2 to rotate. During the rotation of the inner rotor 2, it drives the front wheels 30 to travel.

[0071] In one example, the material of the motor housing 1 can be silicon steel material, which can shield the electromagnetic radiation generated by the high-voltage wiring harness inside the motor 10, avoiding the vibration noise generated by the thin conductive sheet of the vehicle body due to electromagnetic force.

[0072] In one example, in order to further reduce noise, correspondingly, the inner wall of the motor housing 1 has a damping structure, which further attenuates the vibration of the high-voltage wiring harness inside the motor and also reduces the vibration noise caused by the vibration of the high-voltage wiring harness transmitted to the vehicle body through the fixing bracket.

[0073] In the embodiments of the present application, the motor includes an inner motor formed by an inner rotor and an inner stator, and an outer motor formed by an outer rotor and an outer stator. Among them, the outer rotor is used for transmission connection with the engine. Then, the outer motor generates electricity under the drive of the engine, so the outer motor serves as a generator. The inner rotor is used for transmission connection with the wheels. Then, the inner motor can drive the vehicle to travel, so the inner motor serves as a motor. It can be seen that this motor integrates the generator and the motor, with a high degree of integration. The motor with a high degree of integration is arranged in the vehicle, which is beneficial to saving the layout space of the vehicle and facilitating the layout of other components in the vehicle. This motor with a high degree of integration is particularly suitable for small vehicles.

[0074] Moreover, this motor uses the outer motor located on the outside as a generator and the inner motor located on the inside as a motor, which is beneficial to improving the power generation efficiency of the generator.

[0075] Since this motor integrates the generator and the motor, and the generator needs to be driven by the engine, the generator and the engine are adjacent in position. Generally, the engine is arranged in the front of the vehicle, such as in the front engine compartment. Therefore, this motor is arranged in the front of the vehicle. Then, another motor can be arranged at the rear of the vehicle as a rear-wheel drive motor, making the vehicle a four-wheel drive vehicle. This four-wheel drive power configuration has the advantages of a compact structure and low cost.

[0076] In addition, in the solution where the inner stator and the outer stator are assembled on the motor housing by bolts, the inner motor and the outer motor are detachable. Then, in application, if the inner motor needs to be assembled, it only needs to assemble the inner rotor and the inner stator inside the outer stator. If the inner motor does not need to be assembled, there is no need to assemble the inner rotor and the inner stator. Therefore, the motor shown in this embodiment is conducive to flexibly selecting whether to assemble the inner rotor and the inner stator according to the power configuration requirements.

[0077] The embodiment of the present application also provides a power system. Refer to Figure 1 As shown, the power system includes an engine 20 and the motor 10 including an inner motor and an outer motor described above. The outer rotor 5 of the motor 10 is drivingly connected to the engine 20, and the inner rotor 2 of the motor 10 is drivingly connected to the wheels of the vehicle where it is located.

[0078] In the embodiment of the present application, for the motor of this power system, as described above, the inner motor formed by the inner rotor and the inner stator, and the outer motor formed by the outer rotor and the outer stator. Among them, the outer rotor is used to be drivingly connected to the engine. Then, the outer motor generates electricity under the drive of the engine. Thus, the outer motor serves as a generator. The inner rotor is used to be drivingly connected to the wheels. Then, the inner motor can drive the vehicle to travel. Thus, the inner motor serves as a motor. It can be seen that this motor integrates the generator and the motor together, with a high degree of integration. The motor with a high degree of integration is arranged in the vehicle, which is conducive to saving the layout space of the vehicle and facilitating the layout of other components in the vehicle. Such a motor with a high degree of integration is particularly suitable for small vehicles.

[0079] Moreover, since this motor integrates the generator and the motor, because the generator needs to be driven by the engine and the generator and the engine are adjacent in position, and the engine is generally arranged in the front of the vehicle, such as in the front engine compartment. Therefore, this motor is arranged in the front of the vehicle. Then, another motor can be arranged at the rear of the vehicle as a rear drive motor, making the vehicle a four-wheel drive vehicle. This four-wheel drive power configuration has the advantages of a compact structure and low cost.

[0080] In addition, in the solution where the inner stator and the outer stator are assembled on the motor housing by bolts, the inner motor and the outer motor are detachable. Then, in application, if the inner motor needs to be assembled, it only needs to assemble the inner rotor and the inner stator inside the outer stator. If the inner motor does not need to be assembled, there is no need to assemble the inner rotor and the inner stator. Therefore, the motor shown in this embodiment is conducive to flexibly selecting whether to assemble the inner rotor and the inner stator according to the power configuration requirements.

[0081] The embodiment of the present application also provides a range-extended vehicle, including the power system described above. The wheels of the range-extended vehicle are drivingly connected to the inner rotor of the power system. For example, the half shaft of the front wheels of the range-extended vehicle is drivingly connected to the inner rotor.

[0082] In one example, the range extender vehicle can be a four-wheel drive model. Then, the range extender vehicle further includes a rear drive motor, which is drivingly connected to the half shaft of the rear wheel, and the inner rotor of the power system is drivingly connected to the half shaft of the front wheel.

[0083] In the embodiment of the present application, a motor integrating an engine and a motor is arranged at the front wheel of the range extender vehicle, and a rear drive motor is arranged at the rear wheel to achieve a four-wheel drive power configuration. This four-wheel drive power configuration has the advantages of compact structure and low cost.

[0084] Moreover, the outer stator forming the generator and the inner stator forming the motor are fixed to the motor housing by bolts. This fixing method is convenient for disassembly and is conducive to realizing modular assembly. Then, when the range extender vehicle needs to be configured with front-wheel drive in the power configuration, only the inner rotor and the inner stator need to be assembled inside the outer stator. When front-wheel drive is not required, there is no need to assemble the inner rotor and the inner stator, or the assembled inner rotor and inner stator can be disassembled. This modular assembly method is conducive to flexibly selecting whether to assemble according to the power configuration requirements.

[0085] The terms used in the embodiments of the present application are only for explaining the embodiments of the present application and are not intended to limit the present application. Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the ordinary meanings understood by those of ordinary skill in the art to which the present application belongs. The "first", "second" and similar terms used in the specification and claims of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "one" do not indicate a quantity limitation, but indicate that there is at least one. The terms such as "including" or "comprising" mean that the elements or objects appearing before "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. The terms such as "upper", "lower", "left" and "right" are only used to indicate the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may also change accordingly. "Multiple" means two or more, unless otherwise clearly defined.

[0086] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the principle of the present application shall be included in the protection scope of the present application.

Claims

1. A motor, characterized in that: The motor comprises a motor housing (1), an inner rotor (2), an inner stator (3), an outer stator (4) and an outer rotor (5); The inner rotor (2), the inner stator (3), the outer rotor (5) and the outer stator (4) are all located in the motor housing (1), and the inner stator (3) is sleeved outside the inner rotor (2), the outer stator (4) is sleeved outside the inner stator (3), and the outer rotor (5) is sleeved outside the outer stator (4); The outer rotor (5) is used for transmission connection with an engine (20) of the vehicle, and the inner rotor (2) is used for transmission connection with the wheels of the vehicle.

2. The motor according to claim 1, characterized in that The inner stator (3) and the outer stator (4) are both fixed to the motor housing (1) by shrink fitting or bolts, and the stator winding of the inner stator (3) faces the inner rotor (2), while the stator winding of the outer stator (4) faces the outer rotor (5).

3. The motor according to claim 2, characterized in that The stator core of the inner stator (3) has a plurality of first lugs (31) protruding outward from the ring, and the plurality of first lugs (31) are arranged along the circumferential direction; the stator core of the outer stator (4) has a plurality of second lugs (41) protruding inward from the ring, and the plurality of second lugs (41) are arranged along the circumferential direction; The motor housing (1) has a convex ring (11), the inner stator (3) is located inside the convex ring (11), and the first lug (31) is fixed to the convex ring (11) by bolts, and the outer stator (4) is located outside the convex ring (11), and the second lug (41) is fixed to the convex ring (11) by bolts.

4. The motor according to any one of claims 1 to 3, characterized in that: The magnetic steel of the outer rotor (5) is attached to the surface of the rotor body facing the outer stator (4).

5. The motor according to any one of claims 1 to 4, characterized in that: The outer rotor (5) is connected to the engine (20) of the vehicle via a gear train, or the outer rotor (5) is directly connected to the crankshaft of the engine (20) of the vehicle.

6. The motor according to any one of claims 1 to 5, characterized in that: The motor further comprises a motor controller (50), wherein the motor controller (50) is electrically connected to the stator winding of the inner stator (3) and the stator winding of the outer stator (4), respectively.

7. The motor according to any one of claims 1 to 6, characterized in that: The motor housing (1) is made of silicon steel.

8. The motor according to any one of claims 1 to 7, characterized in that: The inner wall of the motor housing (1) has a damping structure.

9. A power system, characterized in that: The power system comprises an engine (20) and a motor (10) as claimed in any one of claims 1 to 8, wherein an outer rotor (5) of the motor (10) is drivingly connected to the engine (20).

10. A vehicle, characterized in that: The vehicle comprises the power system according to claim 9, wherein the inner rotor (2) of the power system is drivingly connected to the wheels of the vehicle.

11. The vehicle according to claim 10, characterized in that The vehicle further comprises a rear-drive motor, which is drivingly connected to the rear wheels of the vehicle, and the inner rotor (2) of the power system is drivingly connected to the front wheels of the vehicle.

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