How do brushless DC geared motors achieve speed reduction?
Nov 13, 2025
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A brushless DC geared motor, also known as a brushless geared motor, is a brushless DC motor with a matching gear reducer. The gear reducer provides lower speeds and higher torque. Different gear ratios within the gear reducer can provide different speeds and torques. This significantly increases the usage rate of brushless DC motors in the automation industry.
A brushless DC geared motor is an integrated unit of a speed reducer and a brushless motor. This integrated unit is also commonly referred to as a brushless geared motor. It is usually assembled and supplied as a complete set by specialized speed reducer manufacturers. Brushless geared motors are widely used in the steel industry, machinery industry, smart homes, office equipment, robotics, drones, and other industries. The advantages of using brushless geared motors include simplified design and space saving.
So how exactly do brushless DC geared motors reduce speed?
A DC brushless geared motor consists of a DC brushless motor and a gearbox (also called a reducer). While DC brushless motors have high input speeds, their torque is very low, making them unsuitable for driving heavy machinery. Therefore, a gearbox is necessary. The reducer lowers the speed and increases the torque, achieving the desired load transmission. The gearbox is composed of multiple gear stages; the higher the number of stages, the lower the speed, the greater the torque, and the higher the load. This combination eliminates the need for a large motor, saving installation space and significantly reducing costs.
Chihai Motor's DC brushless geared motors feature: small size, compact structure, low noise, low energy consumption, low vibration, high transmission efficiency, high reliability, and high load-bearing capacity. Adopting a serialized and modular design, these motors offer wide adaptability. Numerous combinations, installation positions, and structural options are available, allowing users to choose any speed and structural form to meet their specific needs.
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