Title :
An electric assist bicycle drive with automatic continuously variable transmission
Author :
Watterson, Peter A.
Author_Institution :
CSIRO Materials Science and Engineering, Australia
Abstract :
An automatic hybrid bicycle drive, combining human power and electric assistance via an electronic continuously variable transmission (ldquoe-CVTrdquo), is investigated. A trial design is given for a drive combining two planetary gears and two motor/generators in the rear hub. The motors are nested coaxially and the fixed chain ratio is selected so that the motor volumes are in proportion to their rated torques. As well as requiring no gear-changing, the system should achieve high regenerative braking capability, high efficiency and low maintenance.
Keywords :
electric generators; electric motors; hybrid electric vehicles; regenerative braking; variable speed gear; automatic continuously variable transmission; automatic hybrid bicycle drive; electric assist bicycle drive; electronic continuously variable transmission; planetary gears; regenerative braking; Automobiles; Bicycles; Cities and towns; Gears; Humans; Materials science and technology; Mechanical power transmission; Petroleum; Torque; Wheels;
Conference_Titel :
Electrical Machines and Systems, 2008. ICEMS 2008. International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-3826-6
Electronic_ISBN :
978-7-5062-9221-4
