In-wheel motor with integrated magnetic gear for extended speed applications

Abstract

This paper concerns a light electric vehicle (EV) application, based on magnetic transmission. This magnetic transmission is capable to offer extended speed range and it contains an in-wheel motor, which integrates a magnetic gear. In our case, the magnetic gear is multiplying the in-wheel motor speed with a factor of 3.4, offering the possibility to have very high speed for our light EV, without the necessity to supply the electric motor at high frequencies; it means that an efficiency improvement is expected for such magnetic gear integrated topology. This study is carried out by means of numerical analysis and the performances of the in-wheel motor with integrated magnetic gear are evaluated with the finite element method.