{"title":"Torque Improvement and Analysis of a Bearingless Switched Reluctance Motor Under Efficient Levitation Excitation","authors":"Ze-Yuan Liu, Xing-Cheng Wu, Wen-Feng Zhang","doi":"10.1007/s42835-024-01970-0","DOIUrl":null,"url":null,"abstract":"<p>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.</p>","PeriodicalId":15577,"journal":{"name":"Journal of Electrical Engineering & Technology","volume":"35 1","pages":""},"PeriodicalIF":1.6000,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Electrical Engineering & Technology","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s42835-024-01970-0","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
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.
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.