高功率密度牵引应用电机中稀土PM元素去除研究

A. Al-Qarni, A. El-Refaie
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引用次数: 2

摘要

利用重稀土元素的高性能内部永磁(IPM)机器被认为是许多应用特别是牵引应用的主力。镝(Dy)是用于高级永磁(PM)的重稀土元素之一,它的加入对于消除/最小化永久退磁的风险至关重要。另一方面,Dy是受价格波动和可持续性影响的关键因素之一。因此,本文旨在提出一种基于日产Leaf 2012电动机的牵引应用的IPM机器设计,使用混合磁铁类型,消除Dy的使用(可以被认为是混合磁铁),以降低PM的总体成本,同时保持相当的电磁性能。最重要的是,本文的目标是为使用PM材料解决可持续性问题的运输部门提供拓扑结构。本文将使用二维有限元分析(2D-FEA)对所提出的设计进行电磁性能评估。还将介绍关键性能指标的比较,包括扭矩与电流角、效率图、退磁风险,以及与基线设计的综合比较。此外,还包括转子力学分析和成本分析。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
On Eliminating Heavy Rare-Earth PM Elements for High Power Density Traction Application Motors
A high performance Interior Permanent Magnet (IPM) machine utilizing heavy rare-earth elements is considered the workhorse for many applications especially traction applications. Dysprosium (Dy) is one of the heavy rare-earth elements used in higher Permanent Magnet (PM) grades and its inclusion is critical to eliminate/minimize the risk of permanent demagnetization. On the other hand, Dy is one of the key elements that are subject to price volatility as well as sustainability concerns. Therefore, this paper aims to propose an IPM machine design for traction applications based on Nissan Leaf 2012 electric motor using a blend of magnet types that eliminate the use of Dy (can be thought of as hybrid magnets) to reduce the overall PM cost while maintaining comparable electromagnetic performance. Most importantly, this paper's objective is to provide a topology for the transportation sector using PM materials that addresses sustainability concerns. This paper will present the electromagnetic performance evaluation of the proposed design using Two-Dimensional Finite Element Analysis (2D-FEA). Comparison of key performance metrics including torque vs. current angle, efficiency map, risk of demagnetization, and comprehensive comparison to the baseline design will also be presented. In addition, rotor mechanical analysis as well as cost analysis are included.
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