Design of an interior permanent magnet synchronous in-wheel for electric vehicles

This paper deals with a design approach to an interior permanent magnet synchronous motor (TPMSM) used in in-wheel motor drive systems of electric vehicles. Interior Permanent Magnet (TPM) type motor which has high efficiency and high durability is selected. To apply for the electric vehicles, a form, a tire and a wheel of vehicles are considered when calculating the motor performance. So, the constant power region of IPMSM and gear ratio are investigated in order to meet the specifications of the in-wheel motor system. After calculating a motor performance, space harmonic analysis and finite element analysis in consideration of magnetic saturation is used for designing in-wheel motor, and designed motor is verified by experiments.