Speed ratio overview
The speed ratio refers to the gear ratio of the final drive in the axle of the vehicle. It is equal to the angular velocity of the transmission shaft compared to the rotational angular velocity of the axle of the upper axle and the ratio of their rotational speeds.
When a mechanical reducer is used, we refer to the ratio of the rated speed nN (r/min) of the motor to the speed nL of the output shaft of the reducer as the speed ratio I (also known as the gear ratio), i = nN / nL.
When the motor adopts other shifting means, such as frequency conversion speed regulation, slip speed regulation, etc., the ratio of the maximum speed of the motor to the minimum speed is called the speed ratio, indicating the size of the speed regulation range.