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首页> 外文期刊>Electrification Magazine, IEEE >Getting Rare-Earth Magnets Out of EV Traction Machines: A review of the many approaches being pursued to minimize or eliminate rare-earth magnets from future EV drivetrains
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Getting Rare-Earth Magnets Out of EV Traction Machines: A review of the many approaches being pursued to minimize or eliminate rare-earth magnets from future EV drivetrains

机译：将稀土磁体从电动汽车牵引机中脱颖而出：回顾为减少或消除未来电动汽车传动系统中的稀土磁体而采取的许多方法

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摘要

There are now more than 1.5 million plug-in hybrid electric vehicles (HEVs) and battery electric vehicles (BEVs) that have been commercially produced in the world during the past 11 years, and it is likely that the number produced during 2016 exceeded 700,000, a new record. A large percentage of those electrified vehicles use ac permanent magnet (PM) synchronous machines for the traction machines used in their drivetrains. Even more specifically, nearly all of these PM synchronous machines fall into the class of interior PM (IPM) synchronous machines. The origin of this name becomes apparent by inspecting the cross section of a typical IPM machine in Figure 1 that has been simplified to highlight the key features. This figure shows that the magnets are buried in cavities inside the rotor, and the cavities are carefully shaped, often in V configurations, to concentrate more of the PM magnetic flux into the machine's air gap.
机译：在过去的11年中，全球已经有超过150万辆插电式混合动力电动汽车（HEV）和电池电动汽车（BEV）投入商业生产，2016年的产量可能超过70万辆，新记录。这些电动车辆中有很大一部分将交流永磁同步电机用于其传动系统中的牵引机。更具体地说，几乎所有这些PM同步机都属于内部PM（IPM）同步机。通过检查图1中典型IPM机器的横截面可以清楚地看到该名称，该机器已简化以突出关键功能。该图表明，磁铁被埋在转子内部的空腔中，并且空腔通常是V形的，经过精心设计，以将更多的PM磁通量集中到电机的气隙中。

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