is transmitted through the webs 116 and into the electric motors 104 where it is transformed into mechanical rotating power which needs to go through a speed reduction and torque amplification process before it can effectively be used for mining purposes as illustrated in fig4 5 and 6 this rotational power exits the motor 104 via a shaft 130 that connects to a sun or central gear 134 of a primary planetary gear set this sun gear 134 then transmits the power to planet gears 140 these planet gears 140 mesh with an internal annulus gear 148 that provides the output of the primary gear set power is then transmitted from the annulus gear 148 to a sun gear 152 see fig5 of a secondary compound planetary set via another shaft 160 it is important to note that the secondary sun gear 152 is the output for the primary planetary set as well as the input for the secondary planetary set the rotational power is transmitted from this sun gear 152 to a set of large non orbiting planet gears 164 these planet gears 164 are not meshing with an annulus at their full diameter as would be the case in a normal planetary set instead there is a spur gear 168 attached to each side of every planetary gear 164 these spur gears 168 share the same axis of rotation as the large planet gears 164 these spur gears 168 protrude through openings 172 in a main gear case housing 176 permitting them to transfer power outside of the main housing 176 two such spur gear and planetary gear combinations are shown in each of fig5 and 6 on the outside of the housing 176 the spur gears 168 mesh with large ring gears 180 these ring gears.