Performance Comparison of Two Structures of Electric Vehicle Permanent Magnet Machines

In this paper, permanent magnet synchronous machine was selected to be studied for electric vehicle traction application. Two structures of the machine are studied by the finite element method and tested in an electric vehicle simulator. The first one is an inner rotor permanent magnet machine and the second is an outer rotor permanent magnet machine. Performances of the designed machines such as flux, average torque and electromotive force are analyzed. The comparison between them is discussed and the more appropriate structure is then chosen. The results show that outer rotor permanent magnet synchronous machine has provided better performances for electric vehicle application.