Patent ID: 6333577
Filing Date: 2001-12-25
Classification: H02K

Abstract:
An automotive AC dynamo-electric machine capable of bidirectionally transmitting motive power to and from an engine via a power transmission device, and also capable of starting said engine by implementing a motor operation mode and of supplying electric power to a vehicle by implementing a generator operation mode, comprising:a rotor secured to a rotor shaft provided in a bracket;a planetary gear assembly including a sun gear secured to an end of said rotor shaft, a planetary gear meshed with the sun gear, a cylindrical member having an internal gear portion which meshes with said planetary gear and is formed on an inner wall surface thereof, a carrier which rotatably supports said planetary gear via a planetary gear shaft penetrating in an axial direction at a central portion of said planetary gear and which is connected to said power transmission device, and a carrier support shaft extending from said carrier in the axial direction;a one-way clutch which is secured to said rotor shaft and connected to said carrier support shaft and said planetary gear shaft, and enables torque from said carrier support shaft and said planetary gear shaft to be transmitted to said rotor shaft; andan electromagnetic clutch having an electromagnetic clutch main body secured to said bracket, and an electromagnetic clutch follower which is provided opposing said electromagnetic clutch main body and can be connected to and disconnected from said electromagnetic clutch main body,wherein, in the motor operation mode, said electromagnetic clutch follower connects to said electromagnetic clutch main body and also engages said cylindrical member to brake said cylindrical member, and said internal gear portion provides a fixed element, so that torque of said rotor is transmitted to said power transmission device via said rotor shaft, said sun gear, said planetary gear, and said carrier; andin the generator operation mode, said electromagnetic clutch follower disconnects from said electromagnetic clutch main body, and torque from said power transmission device is transmitted to said rotor via said carrier, said planetary gear shaft, said carrier support shaft, said one-way clutch, and said rotor shaft so as to rotate said rotor.