Why Choose Brushless Planetary Gear Motors for Pipeline Robots?

Apr 21, 2026

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Compact Structure, Small Size, and Light Weight

Brushless planetary gear motors possess planetary motion and power splitting transmission characteristics. They feature internal gear pairs, fully utilizing the high load-bearing capacity of the internal meshing teeth and the entire space of the internal gear ring. This results in a compact structure, small overall dimensions, and light weight. Typically, when transmitting the same power and transmission ratio, the volume and weight of a planetary gear motor are approximately 1/2 to 1/6 of that of a conventional gear drive.

Large Transmission Ratio, Enables Motion Synthesis and Decomposition

There are many types of brushless planetary gear motors, such as planetary drives for involute motors, cycloidal pinwheel motors, harmonic motors, and live-gear motors. They generally feature large transmission ratios. When used for motion transmission, their maximum transmission ratio can reach tens or hundreds of thousands. As power transmission, their maximum transmission ratio can reach tens or hundreds. Using a differential planetary gear motor allows for the synthesis of two motions and the decomposition of one action. In certain situations, appropriately selecting the type of planetary drive in the motor can achieve complex motions with various speed variations.

High efficiency and low power loss

Brushless planetary geared motors employ several planetary gears evenly distributed between the inner and outer central gears. This balances the inertial forces acting on the central gears and planetary carrier bearings. This symmetrical structure improves the efficiency of the transmission system. With appropriate selection of the transmission type and a well-designed structure, the efficiency of the motor's planetary drive can reach 0.97~0.99.

Balanced transmission and strong resistance to shock and vibration

By evenly distributing several planetary gears between two central gears and using a load-sharing device to maintain uniform load distribution and power distribution among the planetary gears, not only are the inertial forces of the planetary gears and the rotating arm balanced, but the smoothness of the motor's planetary drive and its resistance to shock and vibration are also significantly improved.

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