Design of an Ultra-High Speed Bearingless Motor for Significant Rated Power
Design of an Ultra-High Speed Bearingless Motor for Significant Rated Power
复制标题
高额定功率超高速无轴承电机的设计
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
E. Severson
中科院分区：
文献类型：
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作者：
Ashad Farhan;M. Johnson;K. Hanson;E. Severson
电动机技术的目标是以尽可能紧凑的外形尺寸、尽可能高效可靠地提供最大功率。磁性材料和半导体器件的最新进展使一类新的电动机成为可能，这些电动机利用超高转速（100，000 + RPM）来增加功率密度。该技术受到与电机轴承相关的缺点的限制，主要是寿命不足和限制电机的速度-功率能力的转子动力学。本文研究的磁悬浮，超高速电机的设计围绕一个无轴承永磁电机拓扑结构，以解决这些挑战。该设计的目标是氢燃料电池压缩机的速度功率能力为160，000 RPM和5.5 kW。该额定值是使用传统轴承的最高速度-功率设计之一，并将扩大无轴承电机的速度-功率额定值的限制。详细的多物理场建模框架的开发和耦合到多目标优化算法，以探索设计空间。提出了一种优化设计，并研究了原型制造。实验验证的建模框架提供了低速和平稳的测试结果。
The goal of electric motor technology is to deliver maximum power in as compact of a form factor as efficiently and reliably as possible. Recent advancements in magnetic materials and semiconductor devices are enabling a new class of electric motors which utilize ultra high rotational speeds (100,000+ RPM) to increase power density. The technology is limited by shortcomings related to motor bearings, primarily insufficient lifetime and rotor dynamics that limit the speed-power capability of the electric machine. This paper investigates the design of a magnetically levitated, ultra-high speed motor based around a bearingless permanent magnet motor topology to solve these challenges. The design targets a speed-power capability of 160,000 RPM and 5.5 kW for a hydrogen fuel cell compressor. This rating is amongst the highest speed-power designs that utilize conventional bearings and would expand the limits of speed-power rating of a bearingless motor. A detailed multi-physics modeling framework is developed and coupled to a multi-objective optimization algorithm to explore the design space. An optimal design is proposed and investigated for prototype fabrication. Experimental validation of the modeling framework is provided with low speed and stationary test results.