2025年"核理安邦“联合博士生学术论坛

高速永磁同步电机反电动势优化设计研究

Not scheduled

1h

Location: 清华大学核能与新能源技术研究院

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Speaker

恩池 刘 (工程物理系)

Abstract

As a crucial component in uranium enrichment cascades, compressors play a key role in the efficient transportation and compression of gases throughout the separation process. The magnetic suspension centrifugal compressor, independently developed by the Institute of Technical Physics at the Department of Engineering Physics, Tsinghua University, has been successfully applied in several domestic uranium enrichment cascade plants. Permanent magnet synchronous motors (PMSM) are favored for high-speed applications due to their high efficiency, low losses, and significant energy-saving effects. The matching of back-EMF with rated voltage is critical to motor performance. This paper analyzes key factors influencing back-EMF, such as magnet design, winding turns, and air gap length. Through a combination of electromagnetic design and simulations, a PMSM's performance was verified, and an optimization plan to reduce back-EMF was proposed. This research offers analysis and optimization of the back-EMF of high-speed PMSMs from a design perspective, providing a reference for the application of high-speed PMSMs in compressors.

摘要

压缩机作为铀浓缩级联中的重要设备，在整个分离过程中承担着气体高效传输和压缩的关键任务，清华大学工程物理系技术物理所自主研发的磁悬浮离心式压缩机已成功应用于国内多处铀浓缩级联工厂。永磁同步电机因其高效率、低损耗和显著的节能效果，是具有更高能效的压缩机用高速电机，其中反电动势与额定电压的匹配关系是电机整体性能的关键，基于此开展了高速永磁同步电机优化设计。首先，文章对电机的关键因素进行了详细分析，发现反电动势的大小与永磁体设计、定子绕组匝数和气隙长度等因素密切相关。其次，文章采用了电磁设计计算和电磁场模拟相结合的方法对一款永磁同步电机进行了性能校核。最后，针对该案例提出了一种优化方案，在软件拟合层面降低了电机的反电动势。该研究在设计层面对高速永磁同步电机反电动势进行了分析与优化，为高速永磁同步电机在压缩机领域的应用提供了参考。