Planetary gearboxes achieve speed reduction or acceleration through different configurations of planetary gears, sun gears, and external ring gears, offering high efficiency and suitability for various applications. For example:
Fixed ring gear, sun gear driving, planetary carrier driven: gear ratio between 2.5 and 5.
Fixed ring gear, planetary carrier driving, sun gear driven: gear ratio between 0.2 and 0.4.
Fixed sun gear, ring gear driving, planetary carrier driven: gear ratio between 1.25 and 1.67.
Fixed sun gear, planetary carrier driving, ring gear driven: gear ratio typically between 0.6 and 0.8.
Fixed planetary carrier, sun gear driving, ring gear driven: gear ratio typically between 1.5 and 4.
Fixed planetary carrier, ring gear driving, sun gear driven: gear ratio between 0.25 and 0.67.
Planetary carrier and ring gear combination, or sun gear and planetary carrier combination: gear ratio 1, all components rotate in the same direction.
Of the three elements, one element is active, while the other two elements remain in a free state; the rotational speed output of the other two elements is uncertain.
