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永磁直线同步电动机的IGA优化设计 王福忠1,李丙全3,刘静1,袁世鹰1 (1.河南理工大学电气工程与自动化学院,河南,焦作,454000;2.中国矿业大学(北京;3.河南工程技术学校机电工程系,河南,焦作,454000) 摘要:永磁直线同步电动机在远距离,大推力应用场合中需要的中枢绕组和永磁体多,系统造价较高.针对该问题,文章以经济指标为目标,采用自适应参数调整和适应值定标相结合的改进遗传算法,通过选取优化变量,确定约束条件及目标函数,实现了永磁直线同步电动机的优化设计.对优化前后的电动机各性能指标进行分析比较后得出,该优化方法能够改善电动机的综合性能指标,提高电动机的推力,减小电动机的体积,从而降低了电动机的制造成本. 关键词:永磁直线同步电动机; 优化设计; 经济指标; 改进遗传算法; IGA; permanent magnet linear synchronous......
Development of high-performance dry-pressed anisotropic permanent ferrite for La-Ca-Sr-Co systemDai-Man Zhu1,2,Zhao-Wen Geng1,Rong-Ming Liu1,2,Xiao-Wen Zhou1,2,Li-Ying Jia1,Guo-Hui Hu1,Qian... μm.Superior dry-pressed magnet ferrite was prepared with typical properties of magnetic induction intensity of Br=421 mT,induction coercivity of Hcb=296 kA·m-1,intrinsic coercivity of Hcj=369 kA·m-1......
of dynamic quality deterioration caused by the proportional plus integral (PI) integral saturation of speed regulator in permanent magnet synchronous motor servo system, a novel anti-windup(AW) design...: permanent magnet synchronous motor (PMSM); anti-windup; PI speed controller; nonlinear friction; disturbance observer; non-overshoot 永磁同步电机(PMSM)以其体积小,功率密度大,低速输出转矩大,效率高,维护简单而被广泛应用于数控,轨道车辆等中[1].PI控制由于其控制算法简......
HD Processes in the Production of SmCo5 Permanent Magnets刘涛,李卫,刘兴民,李建奎,郭朝晖摘 要:The application of ‘extreme’ hydrogen-decrepitation (HD) process using high... showed that the HD processes could improve the magnetic properties and squareness factor of the SmCo5 sintered magnet.关键词:......
J. Cent. South Univ. (2016) 23: 2763-2770 DOI: 10.1007/s11771-016-3338-z Microstructure and properties of low-temperature aged Dy-doped Nd-Fe-B magnet WANG Xiao-li(王晓丽)1, 2, HU Qing-xian(胡庆贤)1, DING... aged and the two-stage aged sintered Dy-doped Nd-Fe-B magnets. Because of the uneven stress distribution in the sintered Dy-doped Nd-Fe-B magnet and the high activation of Dy element, Dy atoms could......
Magnetovisual method for monitoring thermal demagnetization of permanent magnets used in magnetostrictive actuatorsJ.Kaleta,P.WiewiórskiInstitute of Materials Science and Applied Mechanics, Wroclaw... for monitoring of a thermal demagnetization process of permanent magnets. The original method and measurement devices were capable for examination of magnetic, mechanical and thermal defects......
Magnetovisual method for monitoring thermal demagnetization of permanent magnets used in magnetostrictive actuatorsJ.Kaleta,P.WiewiórskiInstitute of Materials Science and Applied Mechanics, Wroclaw... for monitoring of a thermal demagnetization process of permanent magnets. The original method and measurement devices were capable for examination of magnetic, mechanical and thermal defects......
Direct torque control of speed sensorless permanent magnet synchronous motor based on MARS ZHAO Xiangheng1, YANG Wu2, WANG Minhuai1 (1. School of Mechanical and Vehicle Engineering, Hunan University... (permanent magnet synchronous motor) was analyzed, which was used in hybrid electric vehicle. The system model of sensorless control for PMSM of the maximum ratio of torque to current was established based......
and maximum energy product of 360.4kJ/m3. Key words: spark plasma sintering; NdFeB permanent magnet; Nd-rich phase; heat treatment permanent magnetic material prepared by spark plasma sintering WANG Gong-ping, YUE Ming, ZHANG Jiu-xing, LIU Wei-qiang (Key Laboratory......
Fig. 1 Single permanent magnet magnetic density model 则永磁体中总磁矩为: ...N-S向磁密变化规律,如图2(b)所示.理论计算与计算机仿真结果的趋势一致,且误差值小于10%. 表1 本文单个扇形永磁体相关参数 Table 1 Related parameters of a single sector permanent magnet 图2 单块永磁体N-S向磁密度 Fig. 2 Single-block permanent......
