A planetary gear motor is a compact power transmission device that combines an electric motor with a planetary gearbox to deliver high torque at reduced speeds. Its name comes from the gear arrangement, where multiple planet gears rotate around a central sun gear while engaging with an outer ring gear. This structure allows efficient load distribution and stable performance.

One of the key features of a planetary gear motor is its high torque density. Compared to traditional gear systems, it can transmit greater torque within a smaller size, making it ideal for applications with limited installation space. The evenly distributed load across multiple gears also improves durability and reduces wear.

Another major advantage is smooth and precise operation. Planetary gear motors offer low backlash and consistent output, which is essential for applications requiring accurate positioning and controlled motion. They also provide high efficiency and can support a wide range of gear ratios, allowing flexible speed and torque customization.

Due to these advantages, planetary gear motors are widely used in robotics, automation equipment, medical devices, smart home systems, and industrial machinery where compact size, reliability, and precision are critical.