June 16, 2023

Output Torque of Geared Motors: Understanding and Application

The torque of the micro geared motor is a very important parameter, which determines the size of the load that can be driven. The more the gear stages of the micro geared motor, the greater the final output torque, the lower the speed, and the lower the efficiency.

Each gear reducer will have a limit torque, if this value is reached, the gear will be damaged. Generally, it is necessary to calculate the gear modulus and thickness material according to the force of the gear, which can effectively optimize the noise and service life. The reducer can be used with Micro DC motors, brushed motors, brushless motors, and coreless motors are used as drive motors. The structure of the gear reducer is a multi-gear meshing transmission. The principle of driving the large gear through the small gear is supervised. External meshing and helical gears are mostly used. The reduction ratio of the gear reducer for the micro reduction motor is usually about 1:9-500. The larger the reduction ratio The torque will also be greater. The performance characteristics of different types of geared motors will also be different.

Output Torque of Geared Motors

Common worm gear reducers and planetary gear motors, the biggest feature of worm gear micro gear motors are self-locking, staggered axes, stable work, low noise, and the disadvantage is low efficiency. The planetary geared motor not only has high efficiency, but also has the advantages of small size, light weight and large reduction ratio. Compared with other types of geared motors, it can reduce the weight by 30%. It is very suitable for applications with large reduction ratio and compact structure.

The rated load torque of the micro gear motor can be calculated by the rated torque of the micro motor * reduction ratio * transmission efficiency of the reducer. The transmission efficiency of the reducer is the increase efficiency of the torque after the combination of the micro motor and the reducer. The size is affected by the bearing, Influenced by gear friction and lubrication conditions, the efficiency of a single-stage reducer is generally about 90%, and that of a two-stage reducer is about 80%. The more transmission stages, the lower the transmission efficiency. The efficiency of the planetary gear motor is relatively high, and the single-stage transmission efficiency can reach more than 90%. When the reduction ratio is 4-18, the transmission efficiency is about 80%, when the reduction ratio is 25-35, the transmission efficiency is about 70%, and when the reduction ratio is above 50, the transmission efficiency is about 66%.

Application of output torque

Mechanical equipment starting: The output torque of the geared motor directly affects the starting performance of the mechanical equipment. Generally speaking, mechanical equipment needs a large torque to drive its operation when starting, so choosing a geared motor with a large output torque can better meet the starting requirements.

Speed control: The output torque of the geared motor can also be used to control the speed of mechanical equipment. By adjusting the output torque of the geared motor, the speed of the mechanical equipment can be controlled, so as to achieve precise control and adjustment.

Load carrying capacity: The output torque of the geared motor also directly determines its load carrying capacity. When selecting a geared motor, it is necessary to consider the load size and operating state of the mechanical equipment, and select the appropriate output torque to ensure the normal operation of the mechanical equipment.

In order to improve the output torque performance of the geared motor, the following optimization measures can be adopted:

Select an appropriate reduction ratio: When selecting a geared motor, it is necessary to select an appropriate reduction ratio according to actual needs. Generally speaking, the larger the reduction ratio, the larger the output torque, but it will also cause the motor speed to decrease. Therefore, it is necessary to balance between the motor speed and output torque, and choose the most suitable reduction ratio.

Increase the power of the motor: When a larger output torque is required, a motor with a higher power can be selected to increase the output torque.

High-precision reducer: Using a high-precision reducer can increase the reduction ratio and transmission efficiency, thereby increasing the output torque.