Infinitely variable multi-epicyclic friction transmission system for an electric motor including a main shaft; a motor drum comprising two cylindrically shaped half-drums; a rotor accommodated in a cavity defined by the half-drums, the rotor comprising a rotor carrier driver; a plurality of twin planetary cone assemblies attached to the at least one planetary carrier and disposed circumferentially around the two half-drums, each twin planetary cone assembly comprising: a torque tube and planetary cone-hemisphere structure, each planetary cone-hemisphere structure comprising a planetary cone integral with hemisphere at its apex, wherein the planetary cone-hemisphere structure is configured to roll inside the torque tube via the hemisphere, and wherein the slant height of the planetary cones is parallel to the main shaft; a series of spherical planets and at least one reaction ring disposed around the plurality of planetary cones and configured to slide along the planetary cones to vary a gear ratio.