Title :
A high speed induction machine with two-speed transmission as drive for electric vehicles
Author :
Eberleh, B. ; Hartkopf, Th.
Author_Institution :
Inst. of Electr. Power Syst., Darmstadt Univ. of Technol.
Abstract :
The electric machine combined with the transmission is a fundamental part of an electric vehicle. The paper presents a new high speed induction machine coupled with a two-speed automatic shifting transmission in order to reduce size, weight and costs and to improve the efficiency. Its rotation speed is up to 23000 rpm offering a high power density. Machine parameter and simulation results are given to show the potential benefits of a two speed gearbox. The new design is compared with traditional drive trains with fixed reduction ratio. A liquid cooling system using a small gap for the flow was designed in order to increase the continuous output power. The drive unit was built and examined on the test bench. It has been shown that high speed drives offer the possibility of further improvements of the electric traction system of road electric vehicles
Keywords :
cooling; electric vehicles; gears; induction motor drives; power transmission (mechanical); road vehicles; costs reduction; drive trains; electric traction system; electric vehicles; fixed reduction ratio; high speed induction machine; liquid cooling system; road electric vehicles; size reduction; small gap; speed drives; test bench; two speed gearbox; two-speed automatic shifting transmission; weight reduction; Circuit simulation; Electric vehicles; Electronics cooling; Induction machines; Induction motors; Mathematical model; Shafts; Torque; Vehicle driving; Wheels;
Conference_Titel :
Power Electronics, Electrical Drives, Automation and Motion, 2006. SPEEDAM 2006. International Symposium on
Conference_Location :
Taormina
Print_ISBN :
1-4244-0193-3
DOI :
10.1109/SPEEDAM.2006.1649779
