说明：  电动车双闭环程序，采用双闭环方式控制电机，以得到最好的转速性能，并且可以 限制电机的最大电流。 是电动自行车驱动开发者的重要参考资料。
(EV dual closed-loop program, dual closed loop motor control, in order to get the best speed performance, and can Limiting the maximum current of the motor. Is an important reference for the electric bicycle driven developers.)