CN111342586A - Motor, power assembly and car - Google Patents

Abstract

The present application provides an electric motor, a powertrain, and an automobile, and the electric machine can be used in an electric vehicle or an electric vehicle. The motor includes a stator 110 on which stator windings are wound; a cooling device 120, which is provided with at least one spray hole group, each spray hole group includes a plurality of spray holes, so The plurality of spray holes sprays cooling liquid to the end portion 130 of the stator winding, the plurality of spray holes are distributed along the outer circumference of the cross-section of the end portion 130 of the stator winding, and at least one of the plurality of spray holes The included angle between the axes of the two nozzle holes is greater than or equal to 45°. The embodiment of the present application can increase the coverage area of the outer peripheral cooling liquid of the cross section of the end portion 130 of the stator winding, so that the cooling efficiency of the end portion 130 of the stator winding can be improved.

Description

Electric Motors, Powertrains and Vehicles

technical field

The present application relates to the field of electric motor technology, and more particularly, to an electric motor, a powertrain, and an automobile.

Background technique

With the miniaturization of the motor and the improvement of the power density of the motor, the motor, especially the end of the stator winding in the motor, will generate a lot of heat during operation. If it is not cooled in time, it will have a serious impact on the reliability of the motor and the performance of the whole vehicle.

The prior art uses sealing rings to seal the ends of the stator windings with the cooling liquid, uses a pump to pump the cooling liquid to a higher position, injects the cooling liquid from the liquid inlet into the cavity where the ends are located, and uses Gravity flows out of the liquid outlet to achieve cooling of the ends of the stator windings. However, in this cooling method, the temperature of the cooling liquid on the lower side is higher than that on the upper side, which may easily lead to local overheating of the end portion, uneven cooling, and poor cooling effect.

SUMMARY OF THE INVENTION

The present application provides an electric motor, a powertrain and an automobile, which is beneficial to improve the cooling efficiency of the end portion 130 of the stator winding.

In a first aspect, a motor is provided, which includes: a stator 110, on which stator windings are wound; a cooling device 120, on which at least one spray hole group is provided, each spray hole The group includes a plurality of spray holes that spray coolant to the end 130 of the stator winding, and the plurality of spray holes are distributed along the outer circumference of the cross-section of the end 130 of the stator winding, so The included angle between the axes of at least two of the plurality of injection holes is greater than or equal to 45°.

A plurality of nozzle holes are distributed on the outer circumference of the cross section of the end portion 130 of the stator winding, and the included angle between at least two nozzle holes in the plurality of nozzle holes is greater than or equal to 45°, which can make the end portion 130 of the stator winding The coverage area of the outer peripheral coolant in the cross section is increased, so that the cooling efficiency of the end portion 130 of the stator winding can be improved.

In combination with the first aspect, in some implementations of the first aspect, the axes of the plurality of injection holes are perpendicular to the surface of the end portion 130 of the stator winding; or, the plurality of injection holes are along the stator winding The radial distribution of the cross-section of the end 130 .

The axes of the plurality of spray holes are perpendicular to the surface of the end portion 130 of the stator winding, so that the cooling liquid can be sprayed vertically to the surface of the end portion 130 of the stator winding, so that the surface heat transfer coefficient of the end portion 130 of the stator winding can be improved. .

In conjunction with the first aspect, in some implementations of the first aspect, the cross section is in a plane formed by the central axis of the stator and a radial line of the stator.

In combination with the first aspect, in some implementations of the first aspect, the cooling device 120 is a spray ring, and the inner surface of the cross section of the spray ring is semi-arc.

In combination with the first aspect, in some implementations of the first aspect, the radian of the inner surface of the cross-section of the spray ring is consistent with the radian of the outer circumference of the cross-section of the end portion 130 of the stator winding.

The inner surface of the cross section of the spray ring is set to be semi-arc, and the radian of the inner surface of the cross section of the spray ring is consistent with the radian of the outer circumference of the cross section of the end portion 130 of the stator winding, which can save the motor casing The radial size of the motor housing should be increased to avoid the need to expand the radial size of the motor housing when adding a fuel injection ring with no radian or small radian.

With reference to the first aspect, in some implementations of the first aspect, the spray ring is a semi-arc type with inconsistent cross-sectional thickness; or, the spray ring is a thin semi-arc type with a uniform cross-sectional thickness.

Optionally, the spray ring may be a semi-arc type with inconsistent cross-sectional thickness, or may be a thin semi-arc type with uniform thickness.

In conjunction with the first aspect, in some implementations of the first aspect, the spray holes protrude from the inner surface of the spray ring.

The spray hole protrudes from the inner surface of the spray ring, which can control the spray direction of the cooling liquid, reduce the distance from the mouth of the spray hole to the end 130 of the stator winding, and prevent the cooling liquid from being too far away during the spraying process. Deviating from the radial direction of the cross-section of the ends 130 of the stator windings, the heat transfer coefficient can be increased.

With reference to the first aspect, in some implementations of the first aspect, the cooling device 120 is a plastic part.

In combination with the first aspect, in some implementations of the first aspect, the motor further includes a rotating shaft 140 or a rotor 150 , and the rotating shaft or the rotor 150 is provided with spray holes, through which the rotating shaft 140 or the rotor 150 rotates. Centrifugal action sprays coolant from the shaft 140 or the nozzle holes of the rotor 150 to the ends 130 of the stator windings.

The cooling liquid is sprayed from the nozzle holes of the rotating shaft 140 or the rotor 150 to the end portion 130 of the stator winding through the centrifugal action of the rotating shaft 140 or the rotor 150, so as to reduce the temperature on the outer surface of the end portion 130 of the stator winding. At the same time, it cools the inner surface, thereby further improving the cooling efficiency.

In a second aspect, a powertrain is provided, including the motor according to any implementation manner of the first aspect, and a reducer connected to the rotating shaft 140 of the motor, wherein the reducer is provided with heat dissipation The cooling channel and the cooling channel in the motor form a cooling circuit, and the cooling channel is used to provide the cooling device 120 with the cooling liquid.

In a third aspect, an automobile is provided, including the motor according to any one of the implementation manners of the first aspect, and the electric motor provides a driving force for the automobile.

Description of drawings

Figure 1 is an example diagram of the basic structure inside a traditional motor;

FIG. 2 is an example diagram of a structure inside a motor provided by an embodiment of the present application;

FIG. 3 is an example diagram of assembly of the spray ring and the end of the stator winding provided by the embodiment of the present application;

FIG. 4 is an exemplary cross-sectional view of the end assembly of the spray ring and the stator winding provided by the embodiment of the present application;

FIG. 5 is an example diagram of setting a spray hole on a rotating shaft provided by an embodiment of the present application;

6 is a side view of cooling the ends of the entire stator winding provided by an embodiment of the present application;

7 is another cross-sectional illustration of the end assembly of the spray ring and the stator winding provided by the embodiment of the present application;

FIG. 8 is a structural example diagram of a cooling channel in a motor provided by an embodiment of the present application;

FIG. 9 is a structural example diagram of a powertrain provided by an embodiment of the present application.

Detailed ways

For ease of understanding, the application scenarios of the embodiments of the present application are briefly introduced first.

The motor is an electromagnetic device that realizes the conversion or transmission of electrical energy according to the law of electromagnetic induction. It can be applied to electric vehicles, specifically, electric vehicles, such as pure electric vehicles, extended-range electric vehicles, hybrid electric vehicles, fuel cell vehicles, new energy vehicles, and the like. It can also be used in battery management, power conversion, motor drive and other equipment. Figure 1 is a diagram showing an example of the basic structure inside a conventional motor. As shown in FIG. 1 , the conventional motor 100 mainly includes: a stator 110 , a rotating shaft 140 , a rotor 150 , a housing 160 , a front end cover 170 , a rear end cover 180 and a motor bearing 190 . The stator 110 is wound with a stator winding, and when the stator winding is wound, its two ends will extend outward from the two ends of the stator iron core to form the end portion 130 of the stator winding. The relationship between the various components of the motor is as follows: the inner walls of the casing 160, the front end cover 170 and the rear end cover 180 form a cavity, and the cavity is sequentially provided with a stator 110, a rotor 150 and a rotating shaft 140 from the outer ring to the inner ring. That is to say, the rotor 150 is sheathed on the rotating shaft 140 , and the setter 110 is sheathed on the rotor 150 . The stator 110 is fixed in the housing 160 , and the rotor 150 drives the rotating shaft 140 to rotate. Both ends of the rotating shaft 140 are rotatably connected to the two opposite side end faces (the front end cover 170 and the rear end cover 180 ) of the housing 160 through the motor bearings 190 respectively, and one end of the shaft 140 can also extend from one side end face to the input of the reducer. The shaft gear is connected. Usually, when the motor is running at high speed, the stator windings, especially the ends thereof, will generate a lot of heat. If the heat dissipation is not carried out in time, it will seriously affect the working reliability of the motor and the performance of the whole vehicle. Therefore, it is necessary to dissipate heat from the motor. At present, the commonly used heat dissipation methods include water cooling and oil cooling. When the water cooling method is adopted, there will be the following problems: low motor power density, large link thermal resistance, high interface thermal resistance ratio, the end 130 of the stator winding needs to be filled with glue, and no mass production of high-speed oil seals, etc. Therefore, oil cooling more and more widely used.

In terms of oil cooling, an oil injection cooling technology for the end 130 of the stator winding has emerged in recent years. The specific implementation method is as follows: an oil injection ring is used, and the oil injection ring can be arranged on the periphery of the end 130 of the stator winding. The oil is then introduced into the oil injection ring and sprayed from the nozzle holes in the oil injection ring to the surface of the end 130 of the stator winding, thereby cooling the end of the winding. However, this method only specifies that the nozzle holes need to be aligned with the rotation axis, that is to say, each nozzle hole sprays cooling oil to the end 130 of the stator winding along the radial direction of the stator, and the range covered by each nozzle hole is at the same time. It is also limited, so that the outer surface of the end portion 130 of the stator winding cannot form a uniform temperature, and the cooling efficiency is low.

Therefore, in order to avoid the above problems, in the embodiment of the present application, a plurality of nozzle holes are arranged on the outer circumference of the cross section of the end portion 130 of the stator winding in the motor, so that the outer circumference of the cross section of the end portion 130 of the stator winding is covered by the cooling liquid. increase, so that the cooling efficiency of the end portion 130 of the stator winding can be improved.

FIG. 2 is an example diagram of an internal structure of a motor provided by an embodiment of the present application. As shown in FIG. 2 , the motor 200 at least includes a stator 110 and a cooling device 120 .

Wherein, stator windings are wound around the stator 110 . When the stator winding is wound, its two ends will extend outward from the two ends of the stator iron core to form the end portion 130 of the stator winding. The cooling device 120 is provided with at least one spray hole group, each spray hole group includes a plurality of spray holes, the plurality of spray holes spray cooling liquid to the end 130 of the stator winding, the plurality of spray holes Distributed along the outer circumference of the cross section of the end portion 130 of the stator winding, the included angle between the axes of at least two of the plurality of injection holes is greater than or equal to 45°. It should be understood that the number of the plurality of injection holes may be two, or may be three, four, five or more, which is subject to practical application and is not specifically limited herein.

Exemplarily, when the number of the multiple injection holes is two, the included angle between the axes of the two injection holes should be greater than or equal to 45°; when the number of the multiple injection holes is three When the number of nozzle holes is four, the included angle between the axes of at least two nozzle holes in the three nozzle holes should be greater than or equal to 45°; when the number of the nozzle holes is four, among the four nozzle holes The angle between the axes of at least two nozzle holes should be greater than or equal to 45°.

Optionally, the included angle between the axes of at least two of the plurality of spray holes may be equal to 45°, or may be greater than 45°, for example, the included angle may be 45°, 50°, 60°, 90°, 120°, etc., which are not specifically limited in this application.

In the embodiment of the present application, a plurality of spray holes are distributed along the outer circumference of the cross section of the end portion 130 of the stator winding, so that the coverage area of the cooling liquid sprayed to the outer circumference of the cross section of the end portion 130 of the stator winding can be increased. is large, so that the cooling efficiency of the end portion 130 of the stator winding can be improved.

Optionally, the axes of the plurality of spray holes may be perpendicular to the surface of the end portion 130 of the stator winding, so that the cooling liquid can be sprayed vertically to the surface of the end portion 130 of the stator winding, thereby lifting the end portion 130 of the stator winding the surface heat transfer coefficient.

Optionally, the plurality of injection holes may also be distributed along the radial direction of the cross section of the end portion 130 of the stator winding. It should be understood that in actual operation, certain deviations are allowed in the radial distribution along the cross-section.

It should be understood that FIG. 2 is only an example. In practical applications, the cross-section of the end portion 130 of the stator winding may be as shown in FIG. 2 , or may be approximately square or other shapes, which are not specifically limited herein. It should be understood that, in the embodiment of the present application, the cross section may be in a plane formed by the central axis of the stator and the radial line of the stator.

It should be understood that the cooling device 120 may be a spray ring.

Optionally, the cooling device 120 may be a plastic part.

Optionally, the cooling liquid may be cooling oil, or other cooling medium that does not affect the electromagnetic characteristics of the motor.

Optionally, the motor 200 may further include a rotating shaft 140, the rotating shaft may be provided with spray holes, and the cooling liquid is sprayed from the spray holes of the rotating shaft 140 to the stator winding through the centrifugal action of the rotating shaft 140 when the rotating shaft 140 rotates. end 130. Alternatively, the motor 200 may further include a rotor 150, and the rotor 150 may be provided with spray holes, and the cooling liquid is sprayed from the spray holes of the rotor 150 to the ends of the stator windings through the centrifugal action of the rotor 150 when it rotates Section 130. In this way, the outer surface of the end portion 130 of the stator winding can be cooled while the inner surface is cooled, thereby further improving the cooling efficiency.

It should be understood that the rotating shaft 140 and the rotor 150 may not be provided with spray holes. In this case, the cooling liquid sprayed on the upper half of the end portion 130 of the stator winding will drip onto the rotating shaft 140 or on the rotor 150, and then the cooling liquid is sprayed to the end 130 of the stator winding through the centrifugal action of the rotating shaft 140 or the rotor 150, so as to reduce the temperature of the inner surface while cooling the outer surface of the end 130 of the stator winding. , so as to further improve the cooling efficiency. It should be understood that the motor 200 may further include a rotor 150 , a housing 160 , a front end cover 170 , a rear end cover 180 and a motor bearing 190 , which are subject to the components required in practical applications, and are not specifically limited herein.

It should be understood that, in the embodiment of the present application, the spray ring may be located between the housing 160 and the end portion 130 of the stator winding.

As an embodiment, FIG. 3 is a diagram illustrating an assembly example of the spray ring and the end of the stator winding provided by the embodiment of the present application. As shown in FIG. 3 , the inner surface of the cross-section of the spray ring may be designed to be semi-arc, and the arc may be consistent with the arc of the outer circumference of the cross-section of the end portion 130 of the stator winding. Therefore, the radial dimension of the motor housing can be saved, and the radial dimension of the motor housing needs to be enlarged when adding a spray ring with no radian or small radian.

It should be understood that the cross section of the spray ring may be a semi-arc shape with different thicknesses. Exemplarily, as shown in FIG. 4 , the cross section of the spray ring is a semi-arc shape with inconsistent thickness, and each spray hole group includes two spray holes, which are along the ends of the stator windings. The outer circumference of the cross section of 130 is distributed, and the angle between the axes of the two nozzle holes is equal to 90°. It should be understood that when the motor is working normally, the spray ring can spray the cooling liquid to the ends 130 of the stator windings along the radial direction of the cross-section of the ends 130 of the stator windings, so as to achieve cooling of the ends.

Optionally, while using the spray ring to spray the cooling liquid on the outer surface of the end portion 130 of the stator winding, the rotating shaft 140 may be used to spray the cooling liquid on the inner surface of the end portion 130 of the stator winding, which can further achieve uniform heat dissipation of the end portion. , to improve the cooling effect. Specifically, at least one spray hole may be provided on the rotating shaft, and the spray hole is located in the radial direction of the end portion 130 of the stator winding, as shown in FIG. 5 . It should be understood that, in actual work, the cooling liquid can be sprayed onto the ends 130 of the stator windings through a plurality of nozzle holes, so as to improve the coverage of the cooling liquid on the ends 130 of the stator windings, and to avoid ineffective heat dissipation of each part of the ends. balance issue. Exemplarily, FIG. 6 is a side view of the end cooling of the entire stator winding provided by the embodiment of the present application. As shown in FIG. 6 , the spray ring includes 6 spray hole groups, and the 6 spray hole groups are evenly distributed at equal distances on the spray ring, which can achieve uniform cooling of the entire end. It should be understood that, in the embodiment of the present application, the number of the spray hole groups can be determined according to actual needs, in order to make the heat dissipation of each part of the end part uniform. Optionally, the plurality of spray hole groups may be equidistantly distributed on the spray ring, or may be non-equidistantly distributed. For example, since the cooling liquid sprayed from the upper half of the end portion will flow to the lower half, the number of nozzle hole groups in the lower half may be less than that in the upper half.

As another embodiment, the cross section of the spray ring may also be a thin semi-arc shape with a uniform thickness. Exemplarily, as shown in FIG. 7 , the cross section of the spray ring is a thin semi-arc shape with uniform thickness. Optionally, the spray holes can protrude from the inner surface of the spray ring, so as to control the spraying direction of the cooling liquid, reduce the distance from the mouth of the spray holes to the end 130 of the stator winding, and prevent the cooling liquid from being sprayed during the spraying process. Because the distance is too far away from the radial direction of the cross section of the end portion 130 of the stator winding, the heat transfer coefficient can be increased.

FIG. 8 is a diagram illustrating an example of cooling liquid circulation in a motor provided by an embodiment of the present application. It should be understood that, in order to cool the ends 130 of the stator windings, cooling channels 201 can be provided in the housing 160 for the cooling liquid to circulate and both ends extend to the outside of the ends 130 of the stator windings. In order to facilitate the circulation of the cooling liquid in the cooling channel 201 , the cooling channel 201 communicates with the first opening 202 and the second opening 203 respectively opened at the top and bottom ends of the casing 160 , that is, the top and bottom ends of the casing 160 are respectively opened The first opening 202 and the second opening 203 are communicated with the cooling channel 201, so that the cooling liquid can enter the cooling channel 201 from the first opening 202 to absorb the heat in the housing 160, Finally, it is discharged out from the second opening 203 . It should be understood that the cooling liquid may also enter the cooling channel 201 from the second opening 203 and finally be discharged outward from the first opening 201 .

Optionally, in the embodiment of the present application, the cooling channel 201 has flowing cooling liquid, and the spray ring is arranged inside a part of the cooling channel corresponding to the end 130 of the stator winding, so it can The cooling channels corresponding to the holes are provided with a plurality of channels, so that the cooling liquid in the cooling channels can be sprayed to the ends 130 of the stator windings through the spray ring under the action of the pump, so as to cool the stator windings and dissipate heat. It should be understood that the cooling liquid in the cooling channel 201 can also be introduced into the spray ring in other ways, or other channels can also be used to introduce the cooling liquid into the spray ring, which is not specifically limited in this application.

Embodiments of the present application also provide a powertrain. Optionally, the powertrain provided in the embodiments of the present application can be applied to electric vehicles, specifically, electric vehicles, such as pure electric vehicles, extended-range electric vehicles, hybrid electric vehicles, and fuel cell vehicles , new energy vehicles, etc. Optionally, it can also be applied to devices such as battery management, power conversion, and motor drive, which are not specifically limited in this application.

It should be understood that the power assembly may include a motor 200 and a reducer connected to the rotating shaft 140 of the motor 200 , wherein a heat dissipation channel is provided in the reducer, and the heat dissipation channel is connected with the cooling in the motor. The channels form a cooling circuit for supplying the cooling device 120 with the cooling liquid.

Optionally, the powertrain may further include a micro control unit (MCU).

Exemplarily, FIG. 9 is a structural example diagram of a powertrain provided by an embodiment of the present application. As shown in FIG. 9 , the illustrated powertrain includes a motor 200 , a speed reducer 300 and an MCU 400 .

It should be understood that during the actual cooling process of the powertrain, the motor 200 and the reducer 300 may adopt an integrated oil cooling method, and the cooling liquid is specifically cooling oil, that is, the motor 200 and the reducer 300 in the powertrain use Oil cooling system. The MCU 400 can be cooled by water cooling.

It should be understood that the reducer 300 is connected to the rotating shaft 140 of the motor 200 , the reducer 300 is provided with a heat dissipation channel 301 , and the heat dissipation channel 301 and the cooling channel 201 in the motor form a cooling circuit, that is, the motor 200 and the reducer 300 are integrated The optimized cooling system is used to dissipate heat, which not only realizes the cooling of the motor 200 but also realizes the cooling of the reducer 300 .

It should be understood that in the embodiment of the present application, the power assembly further includes an oil pump 310, a heat exchanger 320 and a filter 330, and the oil pump 310, the heat exchanger 320 and the filter 330 are located in the reducer 300, and the oil pump 310 realizes the circulating heat dissipation of the cooling circuit, and the cooling liquid in the cooling circuit can be cooled through the heat exchanger 320, so as to achieve good heat dissipation for the motor 200 and the reducer 300, correspondingly, the filter plays a role in cooling the cooling circuit. for filtering purposes.

It should be understood that the water cooling water outlet 401 of the MCU can be connected to the heat exchanger 320 through the water channel 402 , and the water outlet of the heat exchanger 320 is connected to the water outlet 302 of the reducer 300 . The cooling oil forms a cooling circuit in the motor 200 and the reducer 300 through the oil pump 310 , and exchanges heat with the water flowing out of the MCU 400 through the oil-water heat exchanger 320 .

Therefore, the powertrain provided in this embodiment, by including the motor 200 and the reducer 300, avoids the kinetic energy consumption when the rotor rotates at high speed, achieves the purpose of balanced heat dissipation at the upper and lower ends of the stator winding in the motor, and simultaneously realizes the The purpose of the integrated cooling of the reducer 200 is to make the heat dissipation of the powertrain better.

Embodiments of the present application further provide an automobile. It should be understood that the automobile includes an electric motor 200, and the electric motor 200 can provide driving force for the automobile. It should be understood that the vehicle may be an electric vehicle, for example, a pure electric vehicle, an extended-range electric vehicle, a hybrid electric vehicle, a fuel cell vehicle, a new energy vehicle, etc., which are not specifically limited in this application.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (11)

1. a motor, is characterized in that, comprises: a stator (110), a stator winding is wound around the stator (110); A cooling device (120), the cooling device (120) is provided with at least one spray hole group, each spray hole group includes a plurality of spray holes, and the plurality of spray holes are directed to the end (130) of the stator winding The cooling liquid is sprayed, the plurality of spray holes are distributed along the outer circumference of the cross section of the end portion (130) of the stator winding, and the included angle between the axes of at least two spray holes in the plurality of spray holes is greater than or equal to 45°. 2. The motor according to claim 1, wherein the axes of the plurality of injection holes are perpendicular to the surface of the end portion (130) of the stator winding; or, The plurality of orifices are distributed along the radial direction of the cross-section of the ends (130) of the stator windings. 3. The motor of claim 2, wherein the cross section is in a plane formed by the central axis of the stator and a radial line of the stator. 4 . The motor according to claim 1 , wherein the cooling device ( 120 ) is a spray ring, and the inner surface of the cross section of the spray ring is semi-arc. 5 . 5. The motor according to claim 4, wherein the radian of the inner surface of the cross section of the spray ring is consistent with the radian of the outer circumference of the cross section of the end portion (130) of the stator winding. 6 . The motor according to claim 5 , wherein the spray ring is a semi-arc type with inconsistent cross-sectional thickness; or, The spray ring is a thin semi-arc type with a uniform thickness in cross section. 7 . The motor of claim 6 , wherein the spray holes protrude from the inner surface of the spray ring. 8 . 8. The motor according to any one of claims 1-7, wherein the cooling device (120) is a plastic part. 9. The motor according to claim 1, characterized in that, the motor further comprises a rotating shaft (140) or a rotor (150), and the rotating shaft (140) or the rotor (150) is provided with spray holes, The centrifugal action when the rotating shaft (140) or the rotor (150) rotates sprays the cooling liquid from the nozzle holes of the rotating shaft (140) or the rotor (150) to the ends (130) of the stator windings. 10. A powertrain, characterized in that it comprises the motor according to any one of claims 1-9 and a reducer connected to a rotating shaft (140) of the motor, wherein the reducer is internally provided with There is a heat dissipation channel, and the heat dissipation channel and the cooling channel in the motor form a cooling circuit, and the cooling channel is used for providing the cooling liquid to the cooling device (120). 11. An automobile, characterized by comprising the motor according to any one of claims 1-9, which provides driving force for the automobile.

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