The invention discloses an
electric drive and
hybrid power transmission device based on a composite planetary
gear train. The
hybrid power
system comprises the composite planetary
gear train with twogear rings, a simple planetary
gear train transmission mechanism, a generator, a driving motor, a plurality of clutches, direction-selectable clutches, a controller, a motor
inverter, an external
battery pack and external power such as an engine. A small gear ring of the composite gear
train is connected with the motor through a fixed speed ratio, and a large gear ring is connected with the outputshaft through a fixed speed ratio. The composite
planet carrier is connected with a gear ring of the simple gear
train. An external power input shaft can be connected with a simple
planet carrier, acomposite gear
train sun gear and a motor connecting gear through a
clutch. The device can provide a
hybrid power working mode with three
electric drive speed ratio gears, one series connection, threecontinuous speed changes and nine fixed speed ratios. The
electric drive and
hybrid power transmission device is suitable for electric drive and
hybrid power coupling transmission of electric and
hybrid power vehicles, including ships and amphibious vehicles, aircrafts, and
engineering machinery.