CN219236734U - Multi-motor driving system and automobile - Google Patents
Multi-motor driving system and automobile Download PDFInfo
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- CN219236734U CN219236734U CN202223246309.8U CN202223246309U CN219236734U CN 219236734 U CN219236734 U CN 219236734U CN 202223246309 U CN202223246309 U CN 202223246309U CN 219236734 U CN219236734 U CN 219236734U
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The utility model provides a multi-motor driving system and an automobile, comprising: at least one driving unit, a transmission shaft and a controller; each wheel is driven by a drive unit; each driving unit includes: a plurality of motors connected in sequence; wherein, two adjacent motors of each driving unit are connected through a transmission shaft; the output end of the last motor is connected with the wheels; the controller is respectively connected with a plurality of motors. According to the technical scheme, each driving unit comprises a plurality of motors, and each motor is small in power, small in size, light in weight and convenient to arrange; adjacent motors are connected through a transmission shaft, so that mechanical transmission is simple, and transmission efficiency is high; each wheel is driven by a driving unit, the power performance of the whole vehicle is sufficient, a mechanical differential device between the left wheel and the right wheel is omitted, and each wheel can select a smaller driving motor, so that the arrangement is convenient.
Description
Technical Field
The utility model relates to the technical field of automobile driving, in particular to a multi-motor driving system and an automobile.
Background
The existing electric automobile is driven by a motor to drive left and right wheels, the motor is arranged in the middle of a front axle or a rear axle, and the power of the motor is reduced and increased through a speed reducer and then is respectively transmitted to the left and right wheels through a differential mechanism in the speed reducer.
The motor is driven, and the motor efficiency is lower under the working condition of large climbing gradient; meanwhile, in order to meet the power performance requirement of the whole vehicle, one motor is driven, the motor is large in size, and the arrangement is inconvenient.
Disclosure of Invention
The utility model provides a multi-motor driving system and an automobile, which are used for solving the problems of large motor size and inconvenience in arrangement in the prior art.
In order to solve the technical problems, the utility model is realized by the following technical scheme:
according to a first aspect of the present utility model, there is provided a multi-motor drive system comprising: at least one driving unit, a transmission shaft and a controller;
each wheel is driven by one of the drive units;
each of the driving units includes: a plurality of motors connected in sequence;
wherein two adjacent motors of each driving unit are connected through the transmission shaft; the output end of the last motor is connected with the wheels;
the controller is respectively connected with a plurality of motors.
Preferably, a plurality of the motors are different in a region where the driving efficiency is high.
Preferably, the controller is configured to control one of the motors in each of the drive units to operate individually, and is further configured to control at least two of the motors in each of the drive units to operate simultaneously.
Preferably, in the preset speed region, one of the motors of each of the driving units has a higher driving efficiency with respect to the other motors.
Preferably, each drive unit comprises at least two motors: a first motor and a second motor;
in a first preset speed area, the driving efficiency of the first motor relative to the driving efficiency of the second motor are higher;
in a second preset speed region, the driving efficiency of the second motor relative to the driving efficiency of the first motor is higher;
the speed of the first preset speed region is lower than the speed of the second preset speed region.
Preferably, in the first preset torque area, the driving efficiency of the first motor and the second motor driven together is greater than the driving efficiency of the first motor and the second motor driven independently.
Preferably, in a second preset torque area, the driving efficiency of the first motor and the second motor which are driven independently is larger than the average driving efficiency of the first motor and the second motor which are driven together under corresponding conditions;
the corresponding condition is that the torque is halved under the corresponding rotating speed;
the torque of the first preset torque area is larger than the torque of the second preset torque area.
Preferably, the transmission shaft is a universal transmission shaft.
Preferably, the wheel comprises: front wheels and/or rear wheels.
According to a second aspect of the present utility model, there is provided an automobile comprising: a multi-motor drive system as claimed in any one of the preceding claims.
According to the multi-motor driving system and the automobile, each driving unit comprises the plurality of motors, and compared with the case that only one motor is adopted, under the condition that the total power is the same, the single power of each motor in the driving unit is smaller, the size is smaller, and the arrangement is convenient; and because the single power of each motor is smaller, the weight is relatively lighter, the unsprung mass of the vehicle can be reduced, and the stability and smoothness of the vehicle operation can be improved.
According to the multi-motor driving system and the automobile, each driving unit comprises a plurality of motors, wherein adjacent motors are connected through the transmission shaft, the output end of the last motor is connected with the wheels, the mechanical transmission structure is simple, and the transmission efficiency is high; in addition, each wheel is driven by one driving unit, the power performance of the whole vehicle is sufficient, a mechanical differential device between the left wheel and the right wheel is omitted, and each wheel can select a smaller driving motor, so that the arrangement is convenient;
in an alternative scheme of the utility model, the areas with higher driving efficiency of the motors are different, and different motor driving can be selected according to different vehicle speeds and torques.
In an alternative scheme of the utility model, the controller is configured to control one motor to work independently, and is also configured to control at least two motors to work simultaneously, so that one motor can be selected to work independently according to the whole vehicle requirement, or a plurality of motors can work simultaneously, the system can always keep relatively high working efficiency, and the economy of the whole vehicle is improved.
In an alternative of the present utility model, in a first preset speed region, the driving efficiency of the first motor is relatively high, and in a second preset speed region, the driving efficiency of the second motor is relatively high, and the speed of the first preset speed region is lower than the speed of the second preset speed region; and in the first preset speed area, the first motor is controlled to work, and in the second preset speed area, the second motor is controlled to work, so that complementation on efficiency of different speed areas can be realized.
In an alternative scheme of the utility model, the torque characteristics of the first motor and the second motor are also different, and in a first preset torque area, the driving efficiency of the first motor and the second motor which are jointly driven is larger than the driving efficiency of the first motor and the second motor which are independently driven; in a second preset torque area, the driving efficiency of the first motor and the second motor which are independently driven is larger than the average driving efficiency of the first motor and the second motor which are jointly driven under the corresponding conditions, and the torque of the first preset torque area is larger than the torque of the second preset torque area; when the working condition of large torque demand (first preset torque area), two motors are controlled to be driven simultaneously, when the working condition of low speed and small torque (first preset speed area and second preset torque area) is controlled to be driven independently, when the working condition of high speed and small torque (second preset speed area and second preset torque area) is controlled to be driven independently, the driving system can always keep higher working efficiency, the energy is saved, and the economy of the whole vehicle is further improved.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of a multi-motor drive system according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a multi-motor drive system according to an embodiment of the present utility model;
reference numerals illustrate:
a 1-a drive unit, which is arranged on the frame,
11-a first motor, which is connected to the first motor,
12-a second motor;
2-a wheel of a vehicle, wherein,
3-transmission shaft.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present specification, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower surface", "upper surface", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model.
In the description of the present specification, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
In the description of the present utility model, the meaning of "plurality" means a plurality, for example, two, three, four, etc., unless explicitly specified otherwise.
In the description of the present utility model, unless explicitly stated and limited otherwise, the term "coupled" and the like should be construed broadly, and may be, for example, fixedly coupled, detachably coupled, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The technical scheme of the utility model is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
In one embodiment, a multi-motor drive system is provided, comprising: at least one driving unit 1, a transmission shaft 3, and a controller (not shown), please refer to fig. 1.
Each wheel 2 is driven by a drive unit. Each driving unit includes: referring to fig. 2, two driving units are taken as an example in fig. 2, and the two driving units respectively drive two wheels.
Wherein, two adjacent motors in each driving unit are connected through a transmission shaft 3, and the mechanical transmission structure is simple and the transmission efficiency is high; the output of the last motor is connected to the wheel 2. The controller is respectively connected with a plurality of motors, and the connection between the controller and the motors can be wired connection or wireless connection.
In one embodiment, the last motor (i.e., the motor associated with the wheel) in each drive unit may be disposed in the wheel assembly and the remaining motors may be disposed on the body or frame.
In an embodiment, the areas with higher driving efficiency of the motors are different, and different motor driving can be selected according to different working conditions.
In an embodiment, the controller is configured to control one of the motors in the same driving unit to work independently, and is further configured to control at least two motors in the same driving unit to work simultaneously, and may be selected according to different working conditions, for example: different modes (operating alone, simultaneously) or different motor drives may be selected according to different vehicle speeds and torques.
In one embodiment, in the preset speed region, one of the motors of each driving unit has a higher driving efficiency relative to the other motors.
In one embodiment, each drive unit comprises at least two motors: please refer to fig. 1 and 2 for the first motor 11 and the second motor 12. In a first preset speed area, the driving efficiency of the first motor relative to the second motor is higher; in a second preset speed area, the driving efficiency of the second motor relative to the first motor is higher; the speed of the first preset speed zone is lower than the speed of the second preset speed zone. In the first preset speed region, the first motor with relatively high driving efficiency can be controlled to work independently, and in the second preset speed region, the second motor with relatively high driving efficiency can be controlled to work independently.
In an embodiment, in the first preset torque area, the driving efficiency of the first motor and the second motor driven together is greater than the driving efficiency of the first motor and the second motor driven independently. When the first motor and the second motor are driven together, it is assumed that the first motor and the second motor are required to provide half of the driving torque. If the total driving torque required by the whole vehicle is T, the required driving torque T is all provided by the first motor or the second motor when the single motor is driven; when the two motors are driven together, the first motor and the second motor respectively provide torque of T/2. In the first preset torque area, the efficiency of the first motor or the second motor which is independently driven is smaller than the average efficiency of the first motor and the second motor when the torque is halved under the corresponding rotating speed. Namely:
η1 < (η3+η4)/2 and η2 < (η3+η4)/2;
the parameters are defined as follows:
n-wheel speed;
t-total driving torque required by the vehicle;
η1—efficiency of the motor 1 at the rotational speed n, torque T;
η2—the efficiency of the motor 2 at the rotational speed n, torque T;
η3—the efficiency of the motor 1 at the rotational speed n, torque T/2;
η4-efficiency of the motor 2 at the rotational speed n, torque T/2.
In an embodiment, in the second preset torque area, the driving efficiency of the first motor and the second motor driven independently is greater than the average driving efficiency of the first motor and the second motor driven together under the corresponding conditions; the corresponding condition is that the torque is halved under the corresponding rotating speed; namely: η1 > (η3+η4)/2 or η2 > (η3+η4)/2 (each parameter is as defined above). The torque of the first preset torque zone is greater than the torque of the second preset torque zone.
In an embodiment, the dividing of the first preset torque area and the second preset torque area may be: the dividing of the first and second preset torque areas may be related to the efficiency of the motor, while the dividing line of the first and second preset torque areas is a curve related to the speed, the upper part of the curve is defined as the first preset torque area, and the lower part of the curve is defined as the second preset torque area. The second preset torque area is defined as a second preset torque area outside the first preset torque area relative to the first preset torque area.
When the torque required by the system is located in a first preset torque area, the driving efficiency of the first motor and the second motor which are driven together is higher, and the first motor and the second motor can be controlled to work simultaneously at the moment, so that the energy is saved compared with the independent driving of a certain motor. When the torque required by the system is in the second preset torque area, the driving efficiency of the first motor or the second motor which is independently driven is higher, and the first motor or the second motor can be controlled to independently work at the moment, so that the energy is saved compared with the simultaneous work of the two motors. By reasonably selecting a single motor for driving or two motors for driving together, the driving system can always keep relatively high working efficiency, and the economy of the whole vehicle is improved.
Under the working condition of the second preset torque area, specifically, whether the first motor works independently or the second motor works independently can be judged according to the speed, when the speed is in the first preset speed area, the first motor can be controlled to work independently, and when the speed is in the second preset speed area, the second motor can be controlled to work independently.
In the above embodiment, the first motor and the second motor are used to provide half of the driving torque when they are driven together. In different embodiments, the torque distribution ratio of the first motor and the second motor may not be equal, and other distribution ratios may be adopted according to specific parameters of the motors and the whole vehicle. When not averaged, the average drive efficiency, torque, described in the above embodiments are not halved, but are according to the corresponding split ratio.
In the above embodiment, taking two motors as an example, when each driving unit includes two motors, the whole area is divided into two speed areas according to the speeds: a first preset speed area and a second preset speed area.
In different embodiments, each driving unit may also include three motors, and three motor combinations are adopted, where the whole area is divided into three speed areas according to the speeds; when the torque is matched, three motors are adopted for common driving under the working condition of large torque, and different motors are respectively adopted for independent driving under the working condition of small torque according to three speed areas.
In different embodiments, each driving unit may also be combined with more than three motors, and the distribution principle under different working conditions is similar to that described above, and will not be repeated here.
In one embodiment, the drive shaft is a universal drive shaft.
In one embodiment, the multi-motor drive system may be used for front wheel drive, rear wheel drive, or four wheel drive.
In one embodiment, there is also provided an automobile including: the multi-motor drive system of any of the above embodiments.
It should be appreciated that the present utility model is primarily directed to a structurally improved power supply system in which the various components may be implemented by circuitry or electronics, wherein the software components that may be involved in use are not improvements of the present utility model.
Further, the controller may control the plurality of motors (a single machine works independently, and the plurality of motors work simultaneously) through circuits or electronic devices, such as: the relay can be opened or closed to realize the connection with each motor.
In the description of the present specification, the descriptions of the terms "one embodiment," "an embodiment," "a particular implementation," "an example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (10)
1. A multi-motor drive system, comprising: at least one driving unit, a transmission shaft and a controller;
each wheel is driven by one of the drive units;
each of the driving units includes: a plurality of motors connected in sequence;
wherein two adjacent motors of each driving unit are connected through the transmission shaft; the output end of the last motor is connected with the wheels;
the controller is respectively connected with a plurality of motors.
2. A multi-motor drive system as claimed in claim 1, wherein a plurality of said motors are different in a region where the drive efficiency is high.
3. The multi-motor drive system of claim 2, wherein the controller is configured to control operation of one of the motors in each of the drive units individually, and is further configured to control operation of at least two of the motors in each of the drive units simultaneously.
4. A multi-motor drive system according to claim 3, wherein, in a preset speed region, one motor of the plurality of motors of each of the drive units has a higher drive efficiency relative to the other motors.
5. The multi-motor drive system of claim 4, wherein each drive unit comprises at least two motors: a first motor and a second motor;
in a first preset speed area, the driving efficiency of the first motor relative to the driving efficiency of the second motor are higher;
in a second preset speed region, the driving efficiency of the second motor relative to the driving efficiency of the first motor is higher;
the speed of the first preset speed region is lower than the speed of the second preset speed region.
6. The multi-motor drive system of claim 5, wherein in a first predetermined torque region, the first motor and the second motor are driven together with a greater drive efficiency than the first motor and the second motor are driven individually.
7. The multi-motor drive system of claim 6, wherein in a second predetermined torque region, the drive efficiency of the first motor and the second motor individually driven is greater than the average drive efficiency of the first motor and the second motor jointly driven under the corresponding conditions;
the corresponding condition is that the torque is halved under the corresponding rotating speed;
the torque of the first preset torque area is larger than the torque of the second preset torque area.
8. A multi-motor drive system according to any one of claims 1 to 7, wherein the drive shaft is a universal drive shaft.
9. A multi-motor drive system according to any one of claims 1 to 7, wherein the wheel comprises: front wheels and/or rear wheels.
10. An automobile, comprising: a multi-motor drive system as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223246309.8U CN219236734U (en) | 2022-12-05 | 2022-12-05 | Multi-motor driving system and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223246309.8U CN219236734U (en) | 2022-12-05 | 2022-12-05 | Multi-motor driving system and automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219236734U true CN219236734U (en) | 2023-06-23 |
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ID=86809753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223246309.8U Active CN219236734U (en) | 2022-12-05 | 2022-12-05 | Multi-motor driving system and automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219236734U (en) |
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2022
- 2022-12-05 CN CN202223246309.8U patent/CN219236734U/en active Active
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