电机与控制应用2026，Vol.53Issue(6)：602-611,10.DOI:10.12177/emca.2026.180
刮板机用混合永磁低速电机设计与抗退磁分析
Design and Demagnetization Analysis of a Hybrid Permanent Magnet Low-Speed Motor for Scraper Conveyors
摘要
Abstract
[Objective]Aiming at the issues of high permanent magnet cost,excessive air-gap magnetic field harmonics,and poor high-temperature demagnetization resistance in rare-earth permanent magnet motors for scraper conveyors,this paper proposes a hybrid-pole low-speed permanent magnet synchronous motor(PMSM)excited by both ferrite and NdFeB.The design leverages the advantages of ferrite magnets,such as low cost and strong high-temperature demagnetization resistance,to address these problems.[Methods]The electromagnetic design of the PMSM was first conducted to determine its fundamental parameters.To enhance permanent magnet material utilization,five distinct rotor structures were designed and comparatively analyzed under identical magnet usage conditions,from which the configuration with optimal torque output capability was selected.Subsequently,three hybrid-pole magnetic circuit designs were developed for comparative evaluation.Finally,finite element analysis software was employed to perform comprehensive assessments of the finalized design,including electromagnetic performance analysis,temperature field verification,and high-temperature demagnetization resistance evaluation,thereby validating the effectiveness of the hybrid-pole solution.[Results]Compared with traditional rare-earth permanent magnet motors,the hybrid-pole rotor structure reduced the permanent magnet cost by 15.5%while maintaining the rated torque,decreased the torque ripple by 16.7%,and significantly enhanced the high-temperature demagnetization resistance.[Conclusion]The hybrid-pole rotor structure demonstrates remarkable effectiveness in reducing permanent magnet costs,optimizing motor performance,and improving high-temperature stability,providing reliable technical support for energy-saving,emission reduction,and reduced maintenance requirements in scraper conveyors.关键词
混合磁极/永磁同步电机/铁氧体/高温抗退磁能力Key words
hybrid-pole/permanent magnet synchronous motor/ferrite/high-temperature demagnetization resistance分类
信息技术与安全科学引用本文复制引用
刘家奇,艾叶,王凯冬,于思洋..刮板机用混合永磁低速电机设计与抗退磁分析[J].电机与控制应用,2026,53(6):602-611,10.基金项目
辽宁省自然科学基金联合基金(2023-MSLH-245)Liaoning Provincial Natural Science Foundation Joint Fund(2023-MSLH-245) （2023-MSLH-245）
