Patent ID: 8721495
Filing Date: 2014-05-13
Classification: B62J,B62M,Y10T

Abstract:
1. A motorized rear derailleur comprising: a base member; a movable member movably mounted to the base member between a plurality of gear positions; a pulley arrangement supported by the movable member, the pulley arrangement including a pulley having a dynamo that generates electrical energy in response to rotation of the pulley; a motor unit including an electric motor and a motor controller operatively coupled to the electric motor to operate the electric motor, the motor unit being operatively coupled between the base member and the movable member to selectively move the movable member relative to the base member between the gear positions, the motor unit being electrically coupled to the dynamo to selectively receive electrical energy generated by the dynamo, and the motor controller including a motor control circuit and a sleep mode control circuit, the sleep mode control circuit placing the motor control circuit in a sleep mode in response to an absence of velocity signal being present for a predetermined amount of time and activating the motor control circuit from the sleep mode in response to a velocity signal being detected; and a power limit circuit electrically coupled between the dynamo and the motor unit.