Possible Planetary Gear Set Ratio

1. Sun gear fixed
- Internally geared wheel driving
- Planet carrier driven
- Relatively low gear ratio in low-speed ratio





2. Internally-geared wheel fixed
- Sun gear driving
- Planet carrier driven
- Relatively high gear ratio in low-speed ratio





3. Locking of two elements together so that the planetary gear set rotates as a complete unit, resulting in direct power transmission (1=1).





4. Planet carrier fixed
- Sun gear driving
- Internally-geared wheel driven
- Direction of rotation reversed and gear ratio in low-speed ratio