Shabanpour, Mostafa; Farrokh, Fariba; Faradonbeh, Vahid Zamani; Vahedi, Abolfazl; Asef, Pedram; (2025) Design and Hybrid Analytical Model for Interior Permanent Magnet Generator in an Electric Vehicle Auxiliary Power Unit Application. IET Electrical Systems in Transportation , 2025 (1) 10.1049/els2/6472337.

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Abstract

This study discusses a brushless permanent magnet (PM) generator. A high-efficiency interior PM (IPM) generator has been designed. It is suggested to use a three-phase, 12-/10-pole generator for the auxiliary power unit application. In this regard, to compute the components of the flux density distribution in the air gap of an IPM generator, a hybrid analytical model is employed. The unique aspects of this work include the development of a 2-dimensional (2-D) analytical method to determine the air gap magnetic flux density in the IPM generator, as well as the first-ever replacement of the stator slot with surface currents without the need for a repetitive loop. The rotor body bore receives 1-dimensional (1-D) analytical IPMs first transferred using the magnetic equivalent circuit (MEC) model. After that, the 2-D analysis is modified to take the stator slot’s impacts into account by adding virtual surface currents (VSCs). Using boundary conditions and the Laplace/Poisson equations, the radial and tangential flux components of the flux density distribution in the air gap IPM generator were computed. The suggested method and the acquired findings have been validated by the finite element method (FEM), analytical model, and experimental results, indicating that the IPM generator is a promising option for electric vehicle (EV) auxiliary power unit applications.

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