Title :
Electric vehicle on one wheel
Author_Institution :
Univ. of Appl. Sci., Bielefeld, Germany
Abstract :
This paper presents an innovative unicycle which is powered by a fourquadrant DC-servo drive consisting of a permanent exited DC-motor and a 4q-chopper converter. The control of gravitation, speed and torque is done by an observer-based cascade structure which stabilizes the unicycle automatically and places the driver´s position in such a way that the centre of gravity is always above the axle of the wheel. As electric drive systems are able to correct the tilt angle nearly one hundred times a second these electric one-wheelers can stand absolutely alone just like ghostly balanced.
Keywords :
DC motor drives; angular velocity control; bicycles; choppers (circuits); electric vehicles; machine control; observers; power convertors; servomotors; torque control; 4q-chopper converter; centre of gravity; electric drive system; electric vehicle; fourquadrant DC-servo drive; gravitation control; innovative unicycle; observer-based cascade structure; permanent exited DC-motor; speed control; torque control; wheel; Automatic control; Axles; Electric variables control; Electric vehicles; Gravity; Mechanical sensors; Mechanical variables control; Rubber; Torque control; Wheels;
Conference_Titel :
Vehicle Power and Propulsion, 2005 IEEE Conference
Print_ISBN :
0-7803-9280-9
DOI :
10.1109/VPPC.2005.1554607
