The invention provides a driving system for an electric power-assisted bicycle based on a planetary gear mechanism and front and rear motors, which is characterized in that a planetary gear train and an adjustable-speed motor form an electronic variable-speed ECVT system, and the mechanical structure of the system removes the traditional variable-speed structures such as a crankset tooth piece, a derailleur, a flywheel and the like. And the vehicle control unit determines the working modes of the front driving motor and the adjustable-speed motor according to a built-in control strategy. Under the climbing or accelerating working condition, the front motor is switched into a driving mode; and under the sliding or braking deceleration working condition, the front motor is switched into a regenerative braking mode, braking energy recovery is achieved, and regenerative braking force is provided. A control instruction is transmitted to the motor controller through the CAN bus, stepless speed change within a certain range is achieved by controlling the speed regulating motor, the treading frequency and torque can be kept within a proper interval, and therefore the riding comfort is improved. The one-way clutch can block power transmission from the rear wheel to the planetary gear support, the problem that the pedal strikes the foot when the moped slides is prevented, and accidental injuries are avoided.
本发明提出了一种基于行星齿轮机构及前后双电机的电动助力自行车用驱动系统,其特征为通过行星轮系、调速电机组成电子变速ECVT系统,此系统的机械结构去除了牙盘齿片、拨链器、飞轮等传统变速结构。整车控制器依据内置控制策略,确定前驱动电机及调速电机的工作模式。爬坡或加速工况下,前电机切换为驱动模式;滑行或制动减速工况下,前电机切换为再生制动模式,实现制动能量回收并提供再生制动力。控制指令经CAN总线传输至电机控制器,通过控制调速电机实现一定范围内的无级变速,且可以保持踩踏频率和力矩在适宜的区间,从而提升骑乘舒适性。单向离合器会阻断后轮到行星齿轮支架的动力传递,防止助力车滑行时出现脚踏“打脚”问题,避免意外伤害。
Driving system for electric power-assisted bicycle based on planetary gear mechanism and front and rear motors
一种基于行星齿轮机构及前后双电机的电动助力自行车用驱动系统
05.07.2022
Patent
Elektronische Ressource
Chinesisch
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / B62J Fahrrad- oder Motorradsättel oder -sitze , CYCLE SADDLES OR SEATS |
Europäisches Patentamt | 2022
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