The Case for Induction Motors with Die-cast Copper Rotors for High Efficiency Traction Motors 2009-01-0956
This paper considers the application of die-cast copper rotor induction motors in the drive system of parallel gas/electric hybrid vehicles and compares performance in a realistic driving scenario to that of a permanent magnet motor where efficiency is substantially reduced by PM drag loss. It is concluded from this analysis that the induction machine has a substantial advantage because it can be de-excited when it is not producing torque, eliminating no-load rotational magnetic and electrical loss.
Application of die-cast copper rotor traction motors in the hybrid drive system of the latest generation of large U.S. Army severe-duty trucks is then considered. Results of two different electric motor designs are presented, one with a cast aluminum rotor cage and one with a die-cast copper rotor cage. The copper die-cast rotor motor is shown to be 23% lighter and 30% smaller than the aluminum rotor machine.
Citation: Kirtley, J., Schiferl, R., Peters, D., and Brush, E., "The Case for Induction Motors with Die-cast Copper Rotors for High Efficiency Traction Motors," SAE Technical Paper 2009-01-0956, 2009, https://doi.org/10.4271/2009-01-0956. Download Citation
Author(s):
James L. Kirtley, Richard F. Schiferl, Dale T. Peters, Edwin F. Brush
Affiliated:
Copper Development Association Inc
Pages: 10
Event:
SAE World Congress & Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Electric motors
Propellers and rotors
Copper
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