A Paper on Planetary Gear Train

For power transmission, planetary gear trains are used extensively and are the most important part. Thus, Planetary gearboxes are mostly used to match inertia, lower engine speed, increase torque, and have a stable mechanical interface for pulleys, cams, drums and other mechanical components at the same time.This paper presents the benefits of planetary gear systems over others, to be taken into account when deciding the gear box reduction ratios, minimum and maximum reductions per planetary gear pair level. The case study to evaluate the two-stage gear box reduction ratio is also discussed. The comparison between the planetary gear system and the helical gear system is based on volume, weight and torque density.