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An Inner-spherical Continuously Variable Transmission for Electric Bicycles  

Park, Moon-Woo (Department of Mechanical Design Engineering, Graduate School, Pusan National University)
Lee, Hyoung-Woo (School of Mechanical Engineering, Pusan National University)
Park, No-Gill (School of Mechanical Engineering, Pusan National University)
Publication Information
International Journal of Precision Engineering and Manufacturing / v.9, no.1, 2008 , pp. 7-11 More about this Journal
Abstract
A new continuously variable transmission (CVT) for electric bicycles was developed using a traction drive mechanism with inner and outer spherical rotors. This electric bicycle CVT permits three propulsion modes: human-power only, motor-power only, or a combination of motor power and human power. In addition, the electric bicycle CVT has high power efficiency, large torque capacity, improved drivability, and good packageability. A prototype was manufactured based on a conceptual design, a performance analysis, and a detailed design. This prototype has a rated power of 250 W and input motor speed of 20 rad/s for an overall speed ratio in the range 0.3-1.2. A bench test was conducted to measure the power transmission performance of the prototype.
Keywords
Traction drive; Continuously variable transmission (CVT); Inner-spherical continuously variable transmission (ISCVT); Electric bicycle;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By Web Of Science : 0  (Related Records In Web of Science)
Times Cited By SCOPUS : 1
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