CN104401215A - Double-motor double-planet-row dynamic coupling driving structure - Google Patents
Double-motor double-planet-row dynamic coupling driving structure Download PDFInfo
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- CN104401215A CN104401215A CN201410584883.5A CN201410584883A CN104401215A CN 104401215 A CN104401215 A CN 104401215A CN 201410584883 A CN201410584883 A CN 201410584883A CN 104401215 A CN104401215 A CN 104401215A
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Abstract
The invention provides a double-motor double-planet-row dynamic coupling driving structure. A double-planet-row system consisting of a planet gear mechanism I 7 and a planet gear mechanism II 10 serves as a dynamic coupling device of a motor I 22 and a motor II 14; a brake I 6 is used for locking and unlocking a gear ring I 3; a brake II 11 is used for locking and unlocking a planet carrier II 17; a brake III 12 is used for locking and unlocking a sun wheel II 16. The double-motor double-planet-row dynamic coupling driving structure can be used for realizing multiple working modes including a double-motor separate drive mode, a double-motor rotation speed coupling drive mode and a double-motor torque coupling drive mode and can meet the different running requirements of vehicles.
Description
Technical field
The invention belongs to dynamic assembly component technology field, be specifically related to a kind of double-motor power couple drive assembly.
Background technology
The drive system of the heavy type electric automobile in current China's motor vehicles for civilian use field mainly adopts a heavy motor to add the form of change-speed box, regulated by the driving torque of speed ratio to motor controlling change speed gear box, to meet the climbing of automobile, the requirement of acceleration and maximum speed.But the bearing requirements of this drive form to heavy motor is stricter.Heavy-duty vehicle as under electric coach is operated in speed operation more, thus causes motor to be often operated in the lower work area of efficiency.There will be power interruption in traditional speed-changing mechanism shift process, thus produce the problems such as the traveling comfort that unnecessary impact and impact take.The present invention aims to provide a kind of compact conformation, and power density is large, drive configuration easy and simple to handle.This structure can export large torque actuated vehicle when low vehicle speeds by the torque coupling of two motors, under the prerequisite meeting power performance, keep motor to work efficiently, during high speed, system can meet the need of work of high vehicle speeds by the rotating speed coupling of two motors.
Application number be 201010100671.7 Chinese patent disclose a kind of motor rotating speed couple drive assembly of applicable electric coach, be made up of one group of simple planetary mechanism, two drive motor, mechanical brakes.During low speed, a motor is connected with the sun wheel of planetary mechanism, mechanical brake locking gear ring, and power is inputted by sun wheel, is exported to realize deceleration no-load voltage ratio, export large torque by pinion carrier; During high speed, mechanical brake unlocks gear ring, and a motor power inputs to sun wheel, and No. two motor powers input to the gear ring of the sun and planet gear be attached thereto, and is realized the rotating speed coupling of two motor input powers by sun and planet gear; Program structure is simple and reduce torque capacity and the power of single motor.But exist following not enough: during high speed, the torque of a motor output is limited by the torque capacity of No. two motors.No. two motors do not work when car speed is lower and cause motor driving power can not make full use of when low speed.During low speed, a motor will carry out switching working mode when the speed of a motor vehicle is not high, and the Vehicular shift that result under lower vehicle speed condition is frequent, affects traveling comfort.Therefore vehicle is when low speed driving, and vehicle shift is frequent, and when running at high speed, a motor degree of utilization is lower.Another shortcoming there is torque sudden change in shift process, also affects traveling comfort.
Application number be 201210024534.9 Chinese patent disclose a kind of double-motor coupling transmission system, be made up of one group of sun and planet gear, one group of fixed axis gear mechanism, two drive motor, mechanical brake, two power-transfer clutchs.By exporting and rotating speed coupling output the torque coupling that can realize double-motor that jointly controls of two power-transfer clutchs and a mechanical brake, and the switching before two kinds of output modes.The program achieves power failure-free gearshift when vehicle travels; Realize large torque when low speed by double-motor torque coupling to export, realize high rotating speed by motor rotating speed coupling during high speed and export; No matter in torque coupling or under rotating speed coupling, two motors all participate in work, and degree of utilization is higher.But there is the deficiency of complicated in mechanical structure; Need when switching between torque coupling mode of operation and rotating speed coupling work mode to manipulate two power-transfer clutchs and a mechanical brake, its linkage control device and manipulation complexity simultaneously.
Application number is that the Chinese patent of CN201310117747.0 discloses a kind of double-motor coupling transmission system, and by two groups of planet rows, two motors and a mechanical brake composition, be coupled by the torque and rotational speed of the control realization system to mechanical brake.Realize large torque when low speed by double-motor torque coupling to export, realize high rotating speed by motor rotating speed coupling during high speed and export; The utilization ratio of motor is high.But there is complicated in mechanical structure, power density is little, the deficiency that structure is compact not.
Summary of the invention
The present invention aims to provide a kind of high power density, double-motor multi-model coupling drive configuration easy and simple to handle, and when realizing automobile low speed driving, two motors can realize torque coupling or single motor by two-stage planetary reduction gear, export high pulling torque; During galloping, two motors can be coupled by rotating speed, export high rotating speed; Thus make motor often be operated in efficacious workaround under conventional operating mode; The power density overcoming existing transmission system is little, complex structure, manipulates loaded down with trivial details problem.
The object of the present invention is achieved like this:
Motor (22) outputting power is through a retarder (21), gear (20), be input to a gear ring (3) of a sun and planet gear (7), No. two motor (14) outputting powers are through No. two retarders (13), No. three drgs (12), power is input in No. two sun wheels (16) of No. two sun and planet gears (10), the power of a motor (22) and No. two motors (14) is through a sun and planet gear (7) and No. two sun and planet gear (10) couplings, and export a retarder (2) to by a pinion carrier (4), finally output power to drive axle (1).A drg (6), No. two drgs (11) and No. three drgs (12) are in order to realize the switching between the various mode of operation of double electric machine double row planetary gear power coupling drive configuration.
Accompanying drawing explanation
Accompanying drawing is this double electric machine double row planetary gear power coupling drive configuration composition constructional drawing.
Detailed description of the invention
Now further illustrate by reference to the accompanying drawings.
The present invention is by drive axle (1), main reduction gear (2), a sun and planet gear (7), coupler (8), No. two sun and planet gears (10), No. three drgs (12), No. two retarders (13), No. two motors (14), gear (20), a retarder (21), motor (22) composition, wherein a sun and planet gear (7) is by a gear ring (3), a pinion carrier (4), a satellite gear (5), a drg (6), sun wheel (18) composition, No. two sun and planet gears (10) are by No. two gear rings (9), No. two pinion carriers (17), No. two satellite gears (15), No. two drgs (11), No. two sun wheel (16) compositions, is characterized in that: motor (22) outputting power is through a retarder (21), gear (20), be input to a gear ring (3) of a sun and planet gear (7), No. two motor (14) outputting powers are through No. two retarders (13), No. three drgs (12), power is input in No. two sun wheels (16) of No. two sun and planet gears (10), the power of a motor (22) and No. two motors (14) is through a sun and planet gear (7) and No. two sun and planet gear (10) couplings, and export a retarder (2) to by a pinion carrier (4), finally output power to drive axle (1).A drg (6), No. two drgs (11) and No. three drgs (12) are in order to realize the switching between the various mode of operation of double electric machine double row planetary gear power coupling drive configuration.
The multiple-working mode of double-motor can be obtained by controlling a drg (6), No. two drgs (11) and No. three drgs (12), its assembled state is as shown in table 1, wherein " 1 " represents that drg is in braking mode, " 0 " represents that drg is in releasing orientation, " M " represents that machine operation is at motoring condition, " G " represents that machine operation is at generating state, and " C " represents that motor cuts out.
Table 1 mode of operation
A motor drive operational pattern: motor (22) outputting power is through a retarder (21), gear (20), be input to a gear ring (3), power is on gear ring (3) punishment Cheng Liangge road, power is directly input to a pinion carrier (4) by one No. one, tunnel satellite gear (5), another road is through coupler (8), No. two gear rings (9), No. two satellite gears (15), No. two pinion carriers (17), a sun wheel (18), a satellite gear (5), power is input to a pinion carrier (4), finally by main reduction gear (2), output power to drive axle (1),
A motor regenerative brake mode of operation: vehicle inertia torque is through drive axle (1), main reduction gear (2), a pinion carrier (4), power is divided into two parts by a pinion carrier (4), part power is through a satellite gear (5), power is input to a gear ring (3), another part power is through a satellite gear (5), a sun wheel (18), No. two pinion carriers (17), No. two satellite gears (15), power is input to a gear ring (3), two parts power is input to a retarder (21) through gear (20) by a gear ring (3), drag the rotation of a motor (22), a motor regenerative brake,
No. two motor drive operational patterns: No. two motor (14) outputting powers, through No. two retarders (13), No. two drgs (12), No. two sun wheels (16), No. two satellite gears (15), No. two pinion carriers (17), sun wheel (18), satellite gear (5), pinion carrier (4), main reduction gear (2), export drive axle (1) to;
No. two motor regenerative brake mode of operations: vehicle inertia torque drags the rotation of No. two motors (14), No. two motor (14) regenerative brakes through drive axle (1), main reduction gear (2), pinion carrier (4), satellite gear (5), sun wheel (18), No. two pinion carriers (17), No. two satellite gears (15), No. two sun wheels (16), No. two drgs (12), No. two retarders (13);
Double-motor torque coupling drives mode of operation: motor (22) outputting power is through a retarder (21), gear (20), be input to a gear ring (3), the power of No. two motors (14) is through No. two retarders (13), No. two drgs (12), No. two sun wheels (16), No. two satellite gears (15), No. two pinion carriers (17), coupler (8) is input to a pinion carrier (4), a pinion carrier (4) exports the power of a motor (22) and No. two motors (14) to drive axle (1) through main reduction gear (2),
Double-motor torque coupling regenerative brake mode of operation: vehicle inertia torque is through drive axle (1), main reduction gear (2), a pinion carrier (4), a satellite gear (5), be input to a gear ring (3), power is divided into two-way at gear ring (3) place by power, one tunnel is through gear (20), a retarder (21), drag the rotation of a motor (22), motor (22) regenerative brake, another road is through coupler (8), No. two gear rings (9), No. two satellite gears (15), No. two sun wheels (16), No. three drgs (12), No. two retarders (13) drag the rotation of No. two motors (14), No. two motor (14) regenerative brakes.
Motor rotating speed couple drive mode of operation: motor (22) outputting power is through a retarder (21), gear (20), be input to a gear ring (3) then power be divided into Liang Ge road, one tunnel is input to No. two sun and planet gears (10) through coupler (8), the power of No. two motors (14) is through No. two retarders (13), No. two drgs (12) are input to No. two sun and planet gears (10), the power of a motor (22) and No. two motors (14) is coupled through No. two pinion carriers (17) through rotating speed and outputs to a sun and planet gear (7) by No. two sun and planet gears (10), the power of the power on a gear ring (3) and No. two sun and planet gears (10) is input to a pinion carrier (4) through rotating speed coupling by a sun and planet gear (7) again, a pinion carrier (4) exports the power of a motor (22) and No. two motors (14) to drive axle (1) through main reduction gear (2),
Motor rotating speed coupling regenerative brake mode of operation: vehicle inertia torque is through drive axle (1), main reduction gear (2), be input to a pinion carrier (4), inertia torque goes out to be divided into two-way a pinion carrier (4), one No. one, tunnel satellite gear (5), a sun wheel (18), No. two pinion carriers (17), No. two satellite gears (15), No. two sun wheels (16), No. two drgs (12), No. two retarders (13) drag the rotation of No. two motors (14), No. two motor (14) regenerative brakes, another Lu Jingyi satellite gear (5), be input to a gear ring (3), gear (20), a retarder (21), drag the rotation of a motor (22), motor (22) regenerative brake.
A retarder (21) can be the retarder of stable drive ratio, also can be change-speed box, it can have multiple speed change level, the power that will export from a motor (22) exports to gear (20), multiple speed change levels of this change-speed box at least can possess speedup speed change level or deceleration speed change level, and this retarder also can be cancelled as required.
No. two retarders (13) can be the retarders of stable drive ratio, also can be change-speed box, it can have multiple speed change level, the power that will export from No. two motors (14) exports to sun wheel (16), multiple speed change levels of this change-speed box at least can possess speedup speed change level or deceleration speed change level
Double-motor power source is not defined as motor, and also can be the combination of driving engine or other propulsions source, the characteristic of two propulsions source can be the same or different.A latter linked device of pinion carrier (4) is not defined as main reduction gear (2) and drive axle (1).The driving that drive axle may be used for conventional truck is connected afterwards a pinion carrier (4); Connect drive wheel afterwards a pinion carrier (4), realize the bilateral independent drive of vehicle with two these driving assemblies of cover, to meet the power demand of the High-Powered Vehicle of bilateral independent drive.
No. three drgs (12) can be power-transfer clutchs, and this drg also can be cancelled as required.A drg (6) also can be cancelled as required.
As can be seen from above principle of work, this double-motor multi-model coupling drive configuration can realize that two motors drive separately, the driving of double-motor torque coupling, motor rotating speed couple drive, two motor independent brake energy regenerating, double-motor torque coupling Brake energy recovery, motor rotating speed coupling Brake energy recovery multiple-working mode, the dynamic property demand that vehicle travels can be met, and two motor degree of utilizations are high, it is convenient that double-motor torque coupling drives with motor rotating speed couple drive switching controls.
Claims (5)
1. a double electric machine double row planetary gear power coupling drive configuration, by drive axle (1), main reduction gear (2), a sun and planet gear (7), coupler (8), No. two sun and planet gears (10), No. three drgs (12), No. two retarders (13), No. two motors (14), gear (20), a retarder (21), motor (22) composition, wherein a sun and planet gear (7) is by a gear ring (3), a pinion carrier (4), a satellite gear (5), a drg (6), sun wheel (18) composition, No. two sun and planet gears (10) are by No. two gear rings (9), No. two pinion carriers (17), No. two satellite gears (15), No. two drgs (11), No. two sun wheel (16) compositions, is characterized in that: motor (22) outputting power is through a retarder (21), gear (20), be input to a gear ring (3) of a sun and planet gear (7), No. two motor (14) outputting powers are through No. two retarders (13), No. three drgs (12), power is input in No. two sun wheels (16) of No. two sun and planet gears (10), the power of a motor (22) and No. two motors (14) is through a sun and planet gear (7) and No. two sun and planet gear (10) couplings, and export a retarder (2) to by a pinion carrier (4), finally output power to drive axle (1).A drg (6), No. two drgs (11) and No. three drgs (12) are in order to realize the switching between the various mode of operation of double electric machine double row planetary gear power coupling drive configuration.
2. a kind of double electric machine double row planetary gear power coupling drive configuration described by claim 1, it is characterized in that: an electrical machine working mode is divided into a motor drive operational pattern and a motor regenerative brake mode of operation, under a motor (22) works independently pattern, No. three drgs (12) are operated in braking mode, a drg (6) and No. two drgs (11) are operated in releasing orientation;
Wherein under a motor drive operational pattern, a motor (22) is operated in motoring condition, No. two motors (14) quit work, motor (22) outputting power is through a retarder (21), gear (20), be input to a gear ring (3), power is on gear ring (3) punishment Cheng Liangge road, power is directly input to a pinion carrier (4) by one No. one, tunnel satellite gear (5), another road is through coupler (8), No. two gear rings (9), No. two satellite gears (15), No. two pinion carriers (17), a sun wheel (18), a satellite gear (5), power is input to a pinion carrier (4), finally by main reduction gear (2), output power to drive axle (1),
Under a motor regenerative brake mode of operation, a motor (22) is operated in regenerative brake state, No. two motors (14) quit work, vehicle inertia torque is through drive axle (1), main reduction gear (2), a pinion carrier (4), power is divided into two parts by a pinion carrier (4), part power is through a satellite gear (5), power is input to a gear ring (3), another part power is through a satellite gear (5), a sun wheel (18), No. two pinion carriers (17), No. two satellite gears (15), power is input to a gear ring (3), two parts power is input to a retarder (21) through gear (20) by a gear ring (3), drag the rotation of a motor (22), a motor regenerative brake.
3. a kind of double electric machine double row planetary gear power coupling drive configuration described by claim 1, it is characterized in that: No. two electrical machine working modes are divided into No. two motors to drive separately mode of operation and No. two independent regenerative brake mode of operations of motor, under No. two electrical machine working modes, drg (5) locking gear ring (3), No. two drgs (11) and No. three drgs (12) are unclamped;
Wherein under No. two motor drive operational patterns, a motor (22) quits work, No. two motors (14) are operated in motoring condition, a motor (15) quits work, No. two motor (14) outputting powers, through No. two retarders (13), No. two drgs (12), No. two sun wheels (16), No. two satellite gears (15), No. two pinion carriers (17), sun wheel (18), satellite gear (5), pinion carrier (4), main reduction gear (2), export drive axle (1) to;
Under No. two motor regenerative brake mode of operations, No. two motors (14) are operated in regenerative brake state, a motor (22) quits work, and vehicle inertia torque drags the rotation of No. two motors (14) through drive axle (1), main reduction gear (2), pinion carrier (4), satellite gear (5), sun wheel (18), No. two pinion carriers (17), No. two satellite gears (15), No. two sun wheels (16), No. two drgs (12), No. two retarders (13).No. two motor (14) regenerative brakes.
4. a kind of double electric machine double row planetary gear power coupling drive configuration described by claim 1, it is characterized in that: double-motor torque coupling mode of operation is divided into torque coupling to drive mode of operation and torque coupling regenerative brake mode of operation, under torque coupling mode of operation, No. two drg (11) lockings, a drg (6) and No. three drgs (12) are unclamped;
Wherein under double-motor torque coupling drives mode of operation, motor (22) outputting power is through a retarder (21), gear (20), be input to a gear ring (3), the power of No. two motors (14) is through No. two retarders (13), No. two drgs (12), No. two sun wheels (16), No. two satellite gears (15), No. two gear rings (9), coupler (8) is input to a gear ring (3), gear ring (3) by the power of a motor (22) and No. two motors (14) through a satellite gear (5), a pinion carrier (4), main reduction gear (2) exports drive axle (1) to,
Under double-motor torque coupling regenerative brake mode of operation, a motor (22) and No. two motors (14) are operated in regenerative brake state, vehicle inertia torque is through drive axle (1), main reduction gear (2), a pinion carrier (4), a satellite gear (5), be input to a gear ring (3), power is divided into two-way at gear ring (3) place by power, one tunnel is through gear (20), a retarder (21), drag the rotation of a motor (22), motor (22) regenerative brake, another road is through coupler (8), No. two gear rings (9), No. two satellite gears (15), No. two sun wheels (16), No. three drgs (12), No. two retarders (13) drag the rotation of No. two motors (14), No. two motor (14) regenerative brakes.
5. a kind of double electric machine double row planetary gear power coupling drive configuration described by claim 1, it is characterized in that: motor rotating speed coupling work mode is divided into rotating speed couple drive mode of operation and rotating speed coupling regenerative brake mode of operation, under fast coupling work mode, drg (6), No. two drgs (11) and No. three drgs (12) are unclamped;
Wherein under motor rotating speed couple drive mode of operation, a motor (22) and No. two motors (14) are operated in motoring condition, motor (22) outputting power is through a retarder (21), gear (20), be input to a gear ring (3) then power be divided into Liang Ge road, one tunnel is input to No. two sun and planet gears (10) through coupler (8), the power of No. two motors (14) is through No. two retarders (13), No. two drgs (12) are input to No. two sun and planet gears (10), the power of a motor (22) and No. two motors (14) is coupled through No. two pinion carriers (17) through rotating speed and outputs to a sun and planet gear (7) by No. two sun and planet gears (10), the power of the power on a gear ring (3) and No. two sun and planet gears (10) is input to a pinion carrier (4) through rotating speed coupling by a sun and planet gear (7) again, a pinion carrier (4) exports the power of a motor (22) and No. two motors (14) to drive axle (1) through main reduction gear (2),
Under motor rotating speed coupling regenerative brake mode of operation, a motor (22) and No. two motors (14) are operated in regenerative brake state, vehicle inertia torque is through drive axle (1), main reduction gear (2), be input to a pinion carrier (4), inertia torque goes out to be divided into two-way a pinion carrier (4), one No. one, tunnel satellite gear (5), a sun wheel (18), No. two pinion carriers (17), No. two satellite gears (15), No. two sun wheels (16), No. two drgs (12), No. two retarders (13) drag the rotation of No. two motors (14), No. two motor (14) regenerative brakes, another Lu Jingyi satellite gear (5), be input to a gear ring (3), gear (20), a retarder (21), drag the rotation of a motor (22), motor (22) regenerative brake.
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| CN201410584883.5A CN104401215A (en) | 2014-12-13 | 2014-12-13 | Double-motor double-planet-row dynamic coupling driving structure |
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| CN201410584883.5A CN104401215A (en) | 2014-12-13 | 2014-12-13 | Double-motor double-planet-row dynamic coupling driving structure |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105196863A (en) * | 2015-10-29 | 2015-12-30 | 厦门市福工动力技术有限公司 | Electric vehicle drive device |
| CN106347112A (en) * | 2016-09-19 | 2017-01-25 | 福州大学 | Double planetary gear row type electric drive assembly and drive method thereof |
| CN106627077A (en) * | 2016-12-02 | 2017-05-10 | 福建万润新能源科技有限公司 | Dual-input power coupler and automobile |
| CN106627117A (en) * | 2016-10-28 | 2017-05-10 | 科力远混合动力技术有限公司 | Transmission device for longitudinal-engine rear-drive hybrid vehicle |
| CN106697040A (en) * | 2017-01-20 | 2017-05-24 | 长安大学 | Dual-motor coupling electric power-assisted steering device and control method thereof |
| CN106956580A (en) * | 2017-04-10 | 2017-07-18 | 深圳市万维博新能源技术有限公司 | The pure electric module power set of multinuclear |
| CN107244234A (en) * | 2017-06-27 | 2017-10-13 | 福州大学 | Double electric machine double row planetary gear electric driver and its method of work |
| CN109203969A (en) * | 2017-07-03 | 2019-01-15 | 郑州宇通客车股份有限公司 | A kind of single planetary row transmission component and hybrid power system and vehicle |
| WO2020103451A1 (en) * | 2018-11-21 | 2020-05-28 | 南京越博电驱动系统有限公司 | Dual-motor power driving device and torque distribution control method therefor |
| CN113619382A (en) * | 2021-09-14 | 2021-11-09 | 燕山大学 | Multi-mode power coupling driving system of double-motor pure electric vehicle |
| CN114655347A (en) * | 2022-04-19 | 2022-06-24 | 山东理工大学 | Driving system for electric power-assisted bicycle based on double planetary gear mechanisms and double motors |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105196863A (en) * | 2015-10-29 | 2015-12-30 | 厦门市福工动力技术有限公司 | Electric vehicle drive device |
| CN106347112A (en) * | 2016-09-19 | 2017-01-25 | 福州大学 | Double planetary gear row type electric drive assembly and drive method thereof |
| CN106627117B (en) * | 2016-10-28 | 2019-01-29 | 科力远混合动力技术有限公司 | A kind of transmission device for longitudinal rear-guard hybrid vehicle |
| CN106627117A (en) * | 2016-10-28 | 2017-05-10 | 科力远混合动力技术有限公司 | Transmission device for longitudinal-engine rear-drive hybrid vehicle |
| CN106627077A (en) * | 2016-12-02 | 2017-05-10 | 福建万润新能源科技有限公司 | Dual-input power coupler and automobile |
| CN106627077B (en) * | 2016-12-02 | 2023-10-03 | 福建万润新能源科技有限公司 | Dual-input power coupler and automobile |
| CN106697040A (en) * | 2017-01-20 | 2017-05-24 | 长安大学 | Dual-motor coupling electric power-assisted steering device and control method thereof |
| CN106956580A (en) * | 2017-04-10 | 2017-07-18 | 深圳市万维博新能源技术有限公司 | The pure electric module power set of multinuclear |
| CN107244234A (en) * | 2017-06-27 | 2017-10-13 | 福州大学 | Double electric machine double row planetary gear electric driver and its method of work |
| CN107244234B (en) * | 2017-06-27 | 2023-07-28 | 福州大学 | Dual-motor dual-planet electricity-discharging driving device and working method thereof |
| CN109203969A (en) * | 2017-07-03 | 2019-01-15 | 郑州宇通客车股份有限公司 | A kind of single planetary row transmission component and hybrid power system and vehicle |
| WO2020103451A1 (en) * | 2018-11-21 | 2020-05-28 | 南京越博电驱动系统有限公司 | Dual-motor power driving device and torque distribution control method therefor |
| CN113619382A (en) * | 2021-09-14 | 2021-11-09 | 燕山大学 | Multi-mode power coupling driving system of double-motor pure electric vehicle |
| CN114655347A (en) * | 2022-04-19 | 2022-06-24 | 山东理工大学 | Driving system for electric power-assisted bicycle based on double planetary gear mechanisms and double motors |
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