This sort of gearboxes encompass significant central equipment referred to as as Sunshine, lesser gears rotating all-around it termed as planets & this entire arrangement rotates inside of a cylinder/ring named as ring equipment OR annular gear. Electric power can be supplied to any from the gear & distinctive level https://damienhigcw.bleepblogs.com/34605227/automobile-gearbox-things-to-know-before-you-buy