Analytical design, electromagnetic field analysis and parametric sensitivity analysis of an external rotor permanent mag
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ORIGINAL PAPER
Analytical design, electromagnetic field analysis and parametric sensitivity analysis of an external rotor permanent magnet-assisted synchronous reluctance motor Hassan Moradi CheshmehBeigi1
· Layegh Behroozi1
Received: 19 July 2019 / Accepted: 21 April 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract This paper deals with analytical design, electromagnetic field analysis and parametric sensitivity analysis of an external rotor permanent magnet-assisted synchronous reluctance motor (PMASynRM). In this work, parametric sensitivity analysis of rotor geometry is performed to obtaining the minimum torque ripple and maximum electromagnetic torque with employing numerical analysis based on two-dimensional finite element method (FEM). In order to determine the optimum operation effect of geometry parameters like the q axis insulation ratio and the flux barrier arm angle for the proposed machine with three barriers is investigated and sensitivity of structure for rotor geometrical variation is presented. The studied machine in this work is a three phase, six pole, external rotor PMASynRM, which is designed by analytical approach and analyzed to obtain the maximum torque and minimum torque ripple based on a parametric sensitivity analysis approach. The obtained results from the FEM-based sensitive analysis and electromagnetic field analysis confirm the analytical design procedure for the proposed PMASynRM. Keywords PMASynRM · Sensitivity analysis · Analytical design · External rotor
1 Introduction In recent years, due to the increasing development of electric vehicles (EV) in automotive industries, electric machines with low cost and high performance need to be felt more. Therefore, it is very important and crucial to select suitable traction motors with high efficiency and high-power density capability [1, 2]. In applications that requires high performance, cost effective solution with a high-power density and flux weakening capability, permanent magnet-assisted synchronous reluctance machines are competitive electric machines topologies. This type of electric machines are a combination of two machine characteristic as: 1- high torque/power density, high efficiency and constant-power speed range synchronous machine with permanent magnet; 2- fault tolerant capability, low cost and appropriate highspeed performance synchronous reluctance machine [2].
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Hassan Moradi CheshmehBeigi [email protected] Electrical Engineering Department, Razi University, Kermanshah, Iran
Recently, the PMASynRMs are attended as a strong potential for electrifying power trains because of their merits. Today’s significant studies have been dedicated to the main design challenges of PMASynRMs, namely the maximization of electromagnetic torque and torque ripple reduction [3]. To design a high-performance PMASynRM, designing the rotor geometry with maximum L d and minimum L q to achieving maximum performance is required, it means that in the design procedure, rotor with maximum anisotropic characteri
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