DC gear motors are widely used in robot vacuums, smart home devices, medical equipment and automation systems. Among all motor parameters, torque is the key factor that determines whether the motor can drive the load smoothly and reliably.
Torque is the rotational force generated by a motor. The higher the torque, the stronger the ability to move or push a mechanical load. Insufficient torque can lead to startup failure, stalling or overheating.
A DC motor has high speed but low torque. By adding a gearbox, the speed is reduced while torque is multiplied. This is why gear motors are commonly used in:
Drive wheels of robot cleaners and AGVs
Smart locks, electric curtains and home automation
Medical equipment and laboratory devices
Service robots and precision actuators
 |
|
| Factor | Description |
|---|---|
| Current | Higher current → stronger electromagnetic force |
| Voltage | Increases available power and efficiency |
| Magnetic field strength | Affects the force applied to the rotor |
| Pole number | More poles → lower speed → higher torque |
| Gear ratio | Reduces speed but increases torque output |
Torque (N·m) = 9550 × Power (kW) ÷ Speed (rpm)
Example:
Speed = 216 rpm, Power = 0.77 W
Torque ≈ 36 N·mm
At the same power level:
High speed → low torque → suitable for fans
Low speed → high torque → suitable for driving mechanisms
Torque is a crucial parameter when selecting DC gear motors. Choosing the right torque ensures reliability, longer lifespan and better user experience.
If you are looking for custom gear motors or need technical support, feel free to contact us for professional solutions.
