CN104325883A - Power assembly of full electric vehicle electric drive system - Google Patents
Power assembly of full electric vehicle electric drive system Download PDFInfo
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Abstract
The invention provides a power assembly of a full electric vehicle electric drive system. The invention has a core that the power assembly is provided with an integral integration power assembly design consisting of one set of planetary gear train mechanism and two sets of drive motors; the motors and the transmission shaft of the power assembly adopt a coaxial design; two sets of motors are respectively connected with a planetary gear sun gear and a gear ring; two motors are in coordination control to realize stepless speed regulation; for an electric vehicle which requires high performance, an original single big motor is changed into two small motors for input, and the optimal matching of the revolving speed, the torque and the high efficiency area of the motors can be realized so as to realize the low cost and the high reliability of motor miniaturization, realize the high efficiency of the electric drive system and improve an endurance mileage to the maximum limit. Meanwhile, a speed change mechanism formed by a planetary mechanism has the advantages of compact structure and the like and is favorable for arrangement.
Description
Technical field
The present invention relates to pure electric vehicle drive system dynamic assembly.
Background technology
Along with the consumption of Global Oil resource is increasingly exhausted, electronlmobil will obtain great development, and electronlmobil is not limited to miniature electric automobile, and electronlmobil is also to large-scale passenger and freight car or pursue the future developments such as high dynamic property sport car.So require that drive motor power is increasing, this just causes single power of motor larger, more difficult to electric machine design, as high speed high pulling torque bearing life, too high power can require thick cable, and high-power power electronic cost is high, poor reliability, arrangement difficulty etc. has larger impact.
In addition, usually adopt constant-speed ratio retarder scheme for driven motor car, car load tractive performance index is higher, and the contradiction that the large grade climbing performance of battery-driven car low speed requires constant-speed ratio the requirement of motor high pulling torque and high-speed high-power height rotating speed is more outstanding.According to fixed speed ratio, during low speed climbing, wish for wheel provides larger torque, usually adopt and improve motor torque, or increase speed ratio; But during high speed, what car load was pursued is horsepower characteristic, the rotating speed of motor requires higher due to the speed of a motor vehicle and speed ratio, this requires that motor has the work area of non-constant width and larger overload capacity, require that motor should meet low-speed big, height rotating speed high-power characteristic requirements during high speed, increases design difficulty and the manufacturing cost of motor, also have impact on the design of motor high efficiency range, reduce car load course continuation mileage.
The invention provides a set of pure electric vehicle power drive system dynamic assembly, its core is overlapped the integrated dynamic assembly that drive motor forms and is designed having a set of planetary wheel mechanism and two, its motor and transmission shaft adopt coaxial design, two cover motors are connected with gear ring with satellite gear sun wheel respectively, two motor coordinations control, realize stepless time adjustment, for the performance-oriented battery-driven car of demand, originally single heavy motor is become two little motor inputs, the rotating speed of motor, torque, efficient district optimization matching can be realized again.Thus realize low cost and the high reliability of motor miniaturization, realize power drive system high efficiency, improve course continuation mileage to greatest extent.The speed-changing mechanism of planetary mechanism formation simultaneously, compact conformation, is beneficial to the advantages such as layout.
Summary of the invention
The invention provides a set of pure electric vehicle power drive system dynamic assembly, its core is overlapped the integrated dynamic assembly that drive motor forms and is designed having a set of planetary wheel mechanism and two, its motor and transmission shaft adopt coaxial design, two cover motors are connected with gear ring with satellite gear sun wheel respectively, two motor coordinations control, realize stepless time adjustment, for the performance-oriented battery-driven car of demand, originally single heavy motor is become two little motor inputs, the rotating speed of motor, torque, efficient district optimization matching can be realized again.
For achieving the above object, the present invention adopts following technical scheme:
A kind of pure electric vehicle power drive system dynamic assembly, comprise two drive motor and planetary wheel mechanism, it is characterized in that, first drive motor is connected with planet circular system sun wheel, second drive motor is connected with planet circular system gear ring, planet circular system pinion carrier is connected with diff outer ring, and diff two ends connect left and right wheels by transmission shaft; The axle of planet circular system sun wheel is provided with planet circular system sun wheel lock-up clutch, planet circular system pinion carrier is provided with planet circular system pinion carrier lock-up clutch.
First drive motor is connected with external electric machine controller respectively by cable with the second drive motor.
Planet circular system sun wheel shaft is a hollow shaft, and Left Drive half axial interface is arranged in the hollow shaft of planet circular system sun wheel shaft, and by bearings, Left Drive half axial interface is connected to diff through hollow shaft, and outside connects transmission shaft to left wheel; Right jackshaft interface internal is connected to diff, and outside is connected to wheel by transmission shaft.
Drive motor and transmission shaft coaxial design.
Present invention also offers the control method of above-mentioned dynamic assembly, comprising:
1) in low speed cruise regime, be separated by control lines star wheel series pinion carrier lock-up clutch, planet circular system sun wheel lock-up clutch closes, satellite gear sun wheel locking, first drive motor is in stopped status, second drive motor list machine operation, by the acceleration and deceleration of Motor torque control realization car load;
2) in low speed climbing pattern, be separated by control lines star wheel series pinion carrier lock-up clutch, planet circular system sun wheel lock-up clutch is separated, first drive motor and the second drive motor in running order state simultaneously, by controlling the torque and rotational speed of the first drive motor and the second drive motor, thus realize torque superposition and Transmission Ratio Control, realize the acceleration and deceleration of car load;
3) at high speed cruise regime, be separated by control lines star wheel series pinion carrier lock-up clutch, planet circular system sun wheel lock-up clutch is separated, first drive motor and the second drive motor in running order state simultaneously, by controlling the torque and rotational speed of the first drive motor and the second drive motor, the rotating speed control synchronization of motor, can realize speed ratio is 1, thus realize torque superposition, realize the high-performance cruise of car load;
4) at parking car-parking model, control lines star wheel series sun wheel lock-up clutch locking, pinion carrier locking, thus realize power drive system dynamic assembly output shaft by locking, realize parking parking function.
Beneficial effect of the present invention is:
The invention provides a set of power drive system dynamic assembly, its core overlaps the integrated dynamic assembly device that drive motor forms having a set of planetary wheel mechanism and two, for the performance-oriented battery-driven car of demand, originally single heavy motor is become two little motor inputs, the rotating speed of motor, torque, efficient district optimization matching can be realized again.Thus realize motor miniaturization, realize low cost and high reliability.
In addition, because native system core adopts planet circular system as transmission system, traditional electrical motor-car constant-speed ratio retarder is compared, it can realize low speed large speed ratio, the converter speed ratio function of high speed low speed ratio, torque overload demand when can reduce motor low speed, rotating speed overload demand when reducing high speed, be conducive to motor body design, be conducive to the control of motor cost, reduce the operation area of motor, maximize and optimize machine operation efficient region, improve power drive system efficiency, increase car load course continuation mileage.
For two grades of speed ratio speed reducers of transmission or many grades of speed ratios slow down, utilize double-motor to carry out rotational speed and torque control to planet circular system, it can realize the consecutive variations of speed ratio, realizes electrodeless variable-speed function, has higher shifting comfort.
Planetary mechanism speed-changing mechanism simultaneously, compact conformation, is beneficial to the advantages such as layout, and motor and transmission shaft adopt coaxial design, and motor diameter does not limit by similar gearing speed-reducer input and output wheelbase, and electric machine design length-diameter ratio can optimized design.
Accompanying drawing explanation
Fig. 1 is the system construction drawing of dynamic assembly of the present invention.
Wherein: left jack shaft interface 1, power drive system dynamic assembly 2, first drive motor 3, first drive motor high input voltage cable 4, second drive motor high input voltage cable 5, second drive motor 6, planet circular system gear ring 7, right jack shaft interface 8, diff 9, planet circular system sun wheel 10, planet circular system sun wheel lock-up clutch 11, planet circular system pinion carrier 12, planet circular system pinion carrier lock-up clutch 13.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in more detail, but embodiments of the present invention are not limited thereto.
As shown in Figure 1, pure electric vehicle power drive system dynamic assembly by two motors and sun and planet gear integrated, be specially: the first drive motor 3 rotor connected row star wheel series sun wheel 10, its stator winding is connected with external controller by drive motor 1 high-tension cable 4, the axle of planet circular system sun wheel 10 is a hollow shaft, Left Drive half axial interface 1 is arranged in the hollow shaft of planet circular system sun wheel 10, and pass through bearings, Left Drive half axial interface 1 is connected to diff 9 through hollow shaft, and outside connects transmission shaft to wheel.Second drive motor 6 rotor is connected with planet circular system gear ring 7, and its stator winding is connected with external electric machine controller by drive motor 2 high-tension cable 5.Planetary gear train pinion carrier 12 is connected with diff 9 outer ring, and right jackshaft interface 8 inside is connected to diff 9, and outside is connected to wheel by transmission shaft.Planet circular system sun wheel 10 hollow shaft connects planetary gear train sun wheel and is locked to power-transfer clutch 11, planet circular system pinion carrier 9 is arranged satellite gear pinion carrier lock-up clutch 13.
This drive system dynamic assembly is by two cover motor and planet circular system integrated designs, it is inner that its electric machine rotor is encapsulated in integrated dynamic assembly, it is oil-cooled motor, bottom dynamic assembly, lube system oil pan tray should be set, arrange oil pump to be used for supplying oil coolant oilgear system, cooling motor rotor, dynamic assembly surface motor stator cage outer setting Coolant gallery.Pressure cooling can be carried out by external cooling water expansion tank.
According to car load actual demand, can pass through change two lock-ups clutch, control the mode of operation of motor, car load can realize following operating mode and run.
Operating mode 1 low speed cruise regime:
For urban traffic situation, the speed of a motor vehicle is generally lower, and also less to the demand of power, single motor can meet car load power demand.
Be separated by control lines star wheel series pinion carrier lock-up clutch; planet circular system sun wheel lock-up clutch closes; satellite gear sun wheel locking; first drive motor is in stopped status; only need the second drive motor list machine operation; now be equivalent to constant-speed ratio retarder list motor power assembly, can by the acceleration and deceleration of Motor torque control realization car load.
Operating mode 2 low speed climbing demand model
For under ramp road conditions or full-throttle starting accelerating mode, all larger to the demand of power and torque, and need two motors Driving Torque simultaneously, carry out torque superposition, car load power demand can be met, and low speed requires comparatively large speed ratio, be separated by control lines star wheel series pinion carrier lock-up clutch, planet circular system sun wheel lock-up clutch is separated, first drive motor and the second drive motor in running order state simultaneously, by controlling the torque and rotational speed of the first drive motor and the second drive motor, thus realize torque superposition and Transmission Ratio Control, realize the acceleration and deceleration of car load.
Operating mode 3 high-performance cruise demand model
For high-performance cruise road conditions, comparatively large to power demand, and need two motors Driving Torque simultaneously, carry out torque superposition, car load power demand can be met, and during high speed, less speed ratio can make motor speed lower.
Be separated by control lines star wheel series pinion carrier lock-up clutch, planet circular system sun wheel lock-up clutch is separated, first drive motor and the second drive motor in running order state simultaneously, by controlling the torque and rotational speed of the first drive motor and the second drive motor, the rotating speed control synchronization of motor, can realize speed ratio is 1, thus realizes torque superposition, realizes the high-performance cruise of car load.
Operating mode 4 parking parking function
By control lines star wheel series sun wheel lock-up clutch locking, pinion carrier locking, thus realize power drive system dynamic assembly output shaft by locking, finally realize parking parking function.
Above embodiment display and describe groundwork of the present invention and principal character and advantage of the present invention.The technical personnel of the industry should be understood; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; instead of limit the scope of the invention by any way; without departing from the scope of the invention; the present invention also has various changes and modifications, and these changes and improvements all fall in claimed scope.
Claims (5)
1. a pure electric vehicle power drive system dynamic assembly, comprise two drive motor and planetary wheel mechanism, it is characterized in that, first drive motor is connected with planet circular system sun wheel, second drive motor is connected with planet circular system gear ring, planet circular system pinion carrier is connected with diff outer ring, and diff two ends connect left and right wheels by transmission shaft; The axle of planet circular system sun wheel is provided with planet circular system sun wheel lock-up clutch, planet circular system pinion carrier is provided with planet circular system pinion carrier lock-up clutch.
2. a kind of pure electric vehicle power drive system dynamic assembly as claimed in claim 1, it is characterized in that, the first drive motor is connected with external electric machine controller respectively by cable with the second drive motor.
3. a kind of pure electric vehicle power drive system dynamic assembly as claimed in claim 1, it is characterized in that, planet circular system sun wheel shaft is a hollow shaft, Left Drive half axial interface is arranged in the hollow shaft of planet circular system sun wheel shaft, and pass through bearings, Left Drive half axial interface is connected to diff through hollow shaft, and outside connects transmission shaft to left wheel; Right jackshaft interface internal is connected to diff, and outside is connected to wheel by transmission shaft.
4. a kind of pure electric vehicle power drive system dynamic assembly as claimed in claim 3, is characterized in that, drive motor and transmission shaft coaxial design.
5. the control method of dynamic assembly according to claim 1, is characterized in that,
1) in low speed cruise regime, be separated by control lines star wheel series pinion carrier lock-up clutch, planet circular system sun wheel lock-up clutch closes, satellite gear sun wheel locking, first drive motor is in stopped status, second drive motor list machine operation, by the acceleration and deceleration of Motor torque control realization car load;
2) in low speed climbing pattern, be separated by control lines star wheel series pinion carrier lock-up clutch, planet circular system sun wheel lock-up clutch is separated, first drive motor and the second drive motor in running order state simultaneously, by controlling the torque and rotational speed of the first drive motor and the second drive motor, thus realize torque superposition and Transmission Ratio Control, realize the acceleration and deceleration of car load;
3) at high speed cruise regime, be separated by control lines star wheel series pinion carrier lock-up clutch, planet circular system sun wheel lock-up clutch is separated, first drive motor and the second drive motor in running order state simultaneously, by controlling the torque and rotational speed of the first drive motor and the second drive motor, the rotating speed control synchronization of motor, can realize speed ratio is 1, thus realize torque superposition, realize the high-performance cruise of car load;
4) at parking car-parking model, control lines star wheel series sun wheel lock-up clutch locking, pinion carrier locking, thus realize power drive system dynamic assembly output shaft by locking, realize parking parking function.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104691319A (en) * | 2015-02-26 | 2015-06-10 | 北京新能源汽车股份有限公司 | Double-motor single-planetary-row power transmission system |
| CN105150819A (en) * | 2015-09-10 | 2015-12-16 | 福建万润新能源科技有限公司 | Dual-motor power device for electric vehicle |
| CN106427533A (en) * | 2016-11-16 | 2017-02-22 | 陕西理工学院 | Electric vehicle driving axle and driving and speed-regulating method thereof |
| CN106515407A (en) * | 2016-11-16 | 2017-03-22 | 陕西理工学院 | Electric vehicle drive axle driven by two motors for speed regulation |
| CN108340760A (en) * | 2017-01-19 | 2018-07-31 | 台州双擎动力科技有限公司 | A kind of pure electric vehicle power assembly system |
| CN110509777A (en) * | 2018-05-21 | 2019-11-29 | 上海汽车集团股份有限公司 | A kind of automobile, drive system and its control method |
| CN111555577A (en) * | 2020-05-25 | 2020-08-18 | 潍柴动力股份有限公司 | Double-stator motor, motor control system and control method |
| CN111791717A (en) * | 2019-04-08 | 2020-10-20 | 郑州宇通客车股份有限公司 | Multimode electric drive system and vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104691319A (en) * | 2015-02-26 | 2015-06-10 | 北京新能源汽车股份有限公司 | Double-motor single-planetary-row power transmission system |
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| CN106427533A (en) * | 2016-11-16 | 2017-02-22 | 陕西理工学院 | Electric vehicle driving axle and driving and speed-regulating method thereof |
| CN106515407A (en) * | 2016-11-16 | 2017-03-22 | 陕西理工学院 | Electric vehicle drive axle driven by two motors for speed regulation |
| CN108340760A (en) * | 2017-01-19 | 2018-07-31 | 台州双擎动力科技有限公司 | A kind of pure electric vehicle power assembly system |
| CN110509777A (en) * | 2018-05-21 | 2019-11-29 | 上海汽车集团股份有限公司 | A kind of automobile, drive system and its control method |
| CN111791717A (en) * | 2019-04-08 | 2020-10-20 | 郑州宇通客车股份有限公司 | Multimode electric drive system and vehicle |
| CN111791717B (en) * | 2019-04-08 | 2022-05-17 | 宇通客车股份有限公司 | Multimode electric drive system and vehicle |
| CN111555577A (en) * | 2020-05-25 | 2020-08-18 | 潍柴动力股份有限公司 | Double-stator motor, motor control system and control method |
| CN111555577B (en) * | 2020-05-25 | 2021-11-19 | 潍柴动力股份有限公司 | Double-stator motor, motor control system and control method |
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