Patent ID: 7549939
Filing Date: 2009-06-23
Classification: B60K,F16H,H02K,Y02T

Abstract:
1. A continuously variable transmission, comprising: a drive shaft; a power takeoff shaft; and a power branching device disposed between said drive shaft and said power takeoff shaft, said power branching device having a continuously variable power branch with a variator, and a mechanical power branch parallel thereto, said variator being an electromagnetic transmission having a housing component, an input shaft, an output shaft, a rotatably mounted drive rotor connected to said input shaft, a rotatably mounted power takeoff rotor connected to said output shaft, and a stator connected fixed in terms of rotation and mounted axially displaceably to said housing component, said drive rotor and said power takeoff rotor having permanent magnets each distributed circumferentially axially adjacent to one another in a cylindrical configuration and have alternating polarity, said stator having at least one short-circuit winding disposed radially adjacent to said permanent magnets and connectable to an assigned electronic control system, an effective transmission ratio being adjustable by axial displacement of said stator relative to said drive rotor and said power takeoff rotor.