TWO SPEED GEAR REDUCER ELECTRIC DRIVE MODULE
DRIVE
January 29, 2026
An electric drive module (EDM) for an electrified vehicle is provided. The EDM includes a housing; an electric motor; a single planetary gear set having first and second sun gears, a single planetary carrier rotationally supporting first and second planetary gears in engagement with the respective sun gears, and an absence of a ring gear; and first and second torque transfer devices (TTDs). An output of the motor is connected to the first sun gear and the carrier is connected to a final drive gearset. The EDM is selectively switchable among (i) a first gear where the first TTD is disengaged and the second TTD is engaged grounding the second sun gear to the housing, and (ii) a second gear where the second TTD is disengaged and the first TTD is engaged to couple for common rotation the carrier and the second sun gear.
Discussion in the ATmosphere