This article presents a finite-element-based, multiobjective design optimization study of the fractional-slot, concentrated wound, permanent magnet synchronous machine (FSCW PMSM). Design objectives included maximization of efficiency, minimization of cost and low ripple without sacrificing torque density and wide constant power speed range. A large-scale optimization study revealed that while a V-type rotor provides high torque density, a spoke-type rotor has the benefit of low torque ripple. Quest for a design that can combine the goodness of both V- and spoke type rotors for an FSCW stator has led to a novel interior permanent magnet rotor topology referred here as Y-type. The goals of achieving maximum efficiency, minimum cost and wide CPSR were also accomplished in the proposed Y-type FSCW IPMSM. For experimental verification purpose, three fully optimized rotors - V-, spoke- and Y-type were constructed for a 12-slot/10-pole FSCW stator. Extensive experimental tests were conducted on three machines for a detailed comparison study. It will be shown that the proposed Y-type FSCW IPMSM outperforms both V and spoke-type configurations. A scaled-up version of the Y-type FSCW IPMSM shown to have satisfied many of the Freeedomcar 2020 targets, which is promising for application in electric vehicles.

中文翻译：

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高性能分数槽集中绕组内部永磁电机的新型转子拓扑

本文介绍了分数槽集中缠绕永磁同步电机（FSCW PMSM）的基于有限元的多目标设计优化研究。设计目标包括在不牺牲转矩密度和较宽的恒定功率速度范围的前提下，实现效率的最大化，成本的最小化和低纹波。一项大规模的优化研究表明，虽然V型转子可提供高转矩密度，但辐条型转子却具有低转矩波动的优势。寻求将FSCW定子的V型和辐条型转子的优点结合起来的设计，导致了一种新颖的内部永磁转子拓扑结构，这里称为Y型。提出的Y型FSCW IPMSM还实现了实现最高效率，最低成本和宽CPSR的目标。为了进行实验验证，为12槽/ 10极FSCW定子构造了三个完全优化的转子-V型，辐条型和Y型。在三台机器上进行了广泛的实验测试，以进行详细的比较研究。将显示，提出的Y型FSCW IPMSM优于V型和轮辐型配置。Y型FSCW IPMSM的放大版本已显示出满足了Freeedomcar 2020的许多目标，这有望在电动汽车中应用。