Estimation and comparison of the windage loss of a 60 kW Switched Reluctance Motor for hybrid electric vehicles

Abstract

A Switched Reluctance Motor (SRM) has been designed with outer dimensions, maximum torque, operating area, and maximum efficiency identical to the rare-earth PM motor used in the Toyota Prius. However, an SRM has salient poles in the rotor; thus, additional windage loss is generated. In this paper, estimation of the windage loss of the SRM is carried out. Then, a comparison to the machine test result is carried out. The influence of the windage loss is identified.