Torque Improvement and Analysis of a Bearingless Switched Reluctance Motor Under Efficient Levitation Excitation

IF 1.6 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Ze-Yuan Liu, Xing-Cheng Wu, Wen-Feng Zhang
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引用次数: 0

Abstract

In a bearingless switched reluctance motor (BSRM), there is a conflict between the output regions of effective radial force and positive torque. So a compromise between radial force and torque is usually applied in a classical control scheme of the BSRM, resulting in under-utilization of its optimal performance of both levitation and motion. For a 12/8-pole BSRM, this paper implements a levitation control in the efficient excitation region to maximize the radial load capacity, performs a torque excitation from the unaligned position to the aligned position and adjusts in real time the instantaneous total torque so as to improve its torque output. In a 12/8-pole BSRM, the efficient levitation excitation region of each phase consists of two equal-width sectors, and a rotor angular position cycle is formed with the six equal-width sectors. Based on the optimal objective within each sector and combined with the derived mathematical models of the radial force and torque, the corresponding current constraint is designed to calculate the five currents in the two-excited phases. Further, the control scheme for a 12/8-pole BSRM under efficient levitation excitation is developed to simultaneously regulate four instantaneous values of two radial forces and two phase torques. Finally, the good performance of the proposed method for the 12/8-pole BSRM under efficient suspension excitation is proved by simulation analysis.

Abstract Image

无轴承开关磁阻电机在高效磁悬浮激励下的扭矩改进与分析
在无轴承开关磁阻电机(BSRM)中,有效径向力和正转矩的输出区域之间存在冲突。因此,在无轴承开关磁阻电机的经典控制方案中,通常会在径向力和转矩之间进行折中,导致其悬浮和运动的最佳性能未得到充分利用。对于 12/8 极 BSRM,本文在有效激振区域实施了悬浮控制,以最大限度地提高径向负载能力,从未对准位置到对准位置执行扭矩激振,并实时调整瞬时总扭矩,从而提高扭矩输出。在 12/8 极 BSRM 中,每相的高效励磁区域由两个等宽扇区组成,转子角位置周期由六个等宽扇区组成。根据每个扇区内的最优目标,并结合推导出的径向力和转矩数学模型,设计出相应的电流约束,以计算双励磁相中的五个电流。此外,还为 12/8 极 BSRM 制定了高效悬浮励磁下的控制方案,以同时调节两个径向力和两个相位转矩的四个瞬时值。最后,通过仿真分析证明了所提出的方法在高效悬浮励磁条件下对 12/8 极 BSRM 的良好性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Electrical Engineering & Technology
Journal of Electrical Engineering & Technology ENGINEERING, ELECTRICAL & ELECTRONIC-
CiteScore
4.00
自引率
15.80%
发文量
321
审稿时长
3.8 months
期刊介绍: ournal of Electrical Engineering and Technology (JEET), which is the official publication of the Korean Institute of Electrical Engineers (KIEE) being published bimonthly, released the first issue in March 2006.The journal is open to submission from scholars and experts in the wide areas of electrical engineering technologies. The scope of the journal includes all issues in the field of Electrical Engineering and Technology. Included are techniques for electrical power engineering, electrical machinery and energy conversion systems, electrophysics and applications, information and controls.
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