Driving system for electric power-assisted bicycle based on planetary gear mechanism and front and rear motors

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 certa