New energy vehicle reducer
Author:
Release Time:
2025-10-15
With the rapid development of the automotive industry, Environmental pollution caused by carbon emissions is also becoming increasingly severe. Reducing the emission of harmful gaseous pollutants from automobiles has become a global consensus, and the development of new-energy vehicles is the primary trend for the future. Meanwhile, the advancement of electric vehicle reducers directly drives technological progress in electric vehicles. Electric vehicle reducers play a crucial supporting role in key aspects that influence the development of electric vehicles—namely, driving range and vehicle performance.
The performance of the powertrain system in electric vehicles directly determines their operational performance and is a core component of electric vehicles. The gearbox is used to reduce the rotational speed and increase the torque, thereby meeting the requirements of the working conditions. Gearboxes feature a compact structure, high efficiency, accurate and reliable motion transmission, and convenient operation and maintenance. They can be mass-produced, making them widely applicable. There are many types of gearboxes; according to the number of transmission stages, they can be classified into single-stage and multi-stage gearboxes.
Why a reducer is needed ？
The operating range of the drive motor is an important indicator for evaluating the performance of automotive motors. Currently, motor designers are jointly striving for high rotational speed, large torque, and a wide constant-power speed-regulation range.
Similarly to gasoline-powered vehicles, matching a reducer can multiply the torque output of the drive motor. Moreover, multi-speed transmissions allow the motor to operate within a higher speed range, enabling the system to cover a wider speed range and deliver greater torque.
If electric vehicles didn't have a gearbox, the torque delivered to the wheels would be too low, making it particularly difficult to meet performance requirements—especially when climbing hills or in other situations that demand high torque. On the other hand, during everyday driving, most of the time is spent on flat roads. If we were to choose a motor with high torque for such scenarios, we’d fail to achieve our cost-performance goal. A gearbox’s primary functions are to reduce speed and increase torque, making it a cost-effective solution.
How to choose a reducer?
As an important parameter of the powertrain, the transmission ratio is selected according to the following two principles:
( 1) The motor’s speed ratio and rotational speed must match the vehicle’s speed requirements. The motor’s rotational speed should be matched to the upper limit of the transmission ratio.
( 2) Vehicle speed is determined by power balance.
The transmission ratio that satisfies the system design requirements is the smaller value between the transmission ratio calculated based on vehicle speed and the transmission ratio calculated based on motor power.
Of course, the above is just a brief description of the main approach. Specifically, you should first determine the required power of the drive motor based on the vehicle’s overall requirements—such as hill-climbing capability, cruising speed, hill-climbing speed, and acceleration time—and then, using the pre-selected efficiency map and power output characteristics of the drive motor, along with the vehicle’s overall economic cruising speed requirement, comprehensively consider and select an appropriate transmission ratio.
Contact Us
Add：Automobile Industrial Park, Industrial Cluster Area, Changyuan County, Henan Province
