A study of the characteristics of traction motor performance for EV by electrical steel

This paper presents the characteristic of newly developed electrical steel and motor performance analysis for electric vehicles(EV). Four types of electrical steel, which are optimized for high flux density (PNHF), high frequency low core loss (PNF), high punchability (PNS) and high strength (PNT), are developed and optimized for high frequency operation to reduce the core losses in traction motors to increase fuel efficiency. To identify the motor performance with the newly developed materials, finite element analysis was used to calculate core loss for efficiency map. Also structure analysis was performed to calculate stress on bridge rotor core.