一种磁阻式永磁丝杠结构及其仿真分析
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摘要
提出一种新型的磁阻式永磁丝杠结构,丝杠和螺母的磁极均由半斜环状永磁和软磁凸齿组成,永磁和软磁凸齿相间布置。丝杠和螺母上的永磁凸齿均为径向充磁且充磁方向相反。对所提出的磁阻丝杠的静特性进行了有限元仿真分析,证明了该结构能够实现平稳传动。为了研究节宽与节距的关系,提出了极距比的概念,并对极距比与磁阻丝杠的静特性、螺母推力密度及比推力的关系进行了仿真研究,结果表明,当极距比位于(0,0.5]区间内时,磁阻丝杠能够进行稳定传动;极距比在(0,0.3]区间内变化时,螺母推力和推力密度的变化量不到7%;比推力则在极距比为0.3时达到最大,磁能利用率最高。在进行磁阻丝杠设计时,建议极距比取0.3。
A new structure of Reluctance linear-rotary magnetic gear( RLRMG) is proposed. The poles on screw and nut are composed of semi-oblique ring type permanent magnetic and soft magnetic,and call the poles as convex tooth. The permanent magnetic and soft magnetic convex tooth are arranged alternately. The permanent convex teeth on the screw and nut are both radially magnetized and the magnetized direction is opposite.The static characteristics of RLRMG are simulated with FEM. It is proved that the RLRMG can realize smooth transmission. The concept of Pole pitch ratio( PPR) is proposed in order to describe the relationship of pole width and pitch. The relationship between PPR and static characteristics of RLRMG,thrust density and specific thrust are investigated with simulation. Result shows that when PPR is in the interval( 0,0. 5],RLRMG can realize smooth transmission. When PPR is in the range of( 0,0. 3],the change of thrust force and thrust density of nut are all less than 7%. When PPR is 0. 3,the specific thrust has the maximum value,that is has the maximum pole utilization ratio. When design a RLRMG,PPR should be 0. 3.
A new structure of Reluctance linear-rotary magnetic gear( RLRMG) is proposed. The poles on screw and nut are composed of semi-oblique ring type permanent magnetic and soft magnetic,and call the poles as convex tooth. The permanent magnetic and soft magnetic convex tooth are arranged alternately. The permanent convex teeth on the screw and nut are both radially magnetized and the magnetized direction is opposite.The static characteristics of RLRMG are simulated with FEM. It is proved that the RLRMG can realize smooth transmission. The concept of Pole pitch ratio( PPR) is proposed in order to describe the relationship of pole width and pitch. The relationship between PPR and static characteristics of RLRMG,thrust density and specific thrust are investigated with simulation. Result shows that when PPR is in the interval( 0,0. 5],RLRMG can realize smooth transmission. When PPR is in the range of( 0,0. 3],the change of thrust force and thrust density of nut are all less than 7%. When PPR is 0. 3,the specific thrust has the maximum value,that is has the maximum pole utilization ratio. When design a RLRMG,PPR should be 0. 3.
引文
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[14]郑果.永磁丝杠传动特性及磁极结构研究[D].焦作:河南理工大学,2016:16-18.
[2]杨超君,顾红伟.永磁传动技术的发展现状和展望[J].机械传动,2008,32(2):1-4.
[3]FURLANI E P.A two-dimensional analysis for the coupling of magnetic gears[J].IEEE Transactions on Magnetics Mag,1997,33(3):2317-2321.
[4]KIKUCHI S,TSURUMOTO K.Design and characteristics of a new magnetic worm gear using permanent magnet[J].IEEE Transactions on Magnetics,1993,29(6):2923-2925.
[5]FRANK N W,TOLIYAT H A.Analysis of the concentric planetary magnetic gear with strengthened stator and interior permanent magnet inner rotor[J].IEEE Transactions on Industry Applications,2011,47(4):1652-1660.
[6]HOLEHOUSE R C,ATALLAH K,WANG J.Design and realization of a linear magnetic gear[J].IEEE Transactions on Magnetics,2011,47(10):4171-4174.
[7]SHAH L,CRUDEN A,WILLIAMS B W.A variable speed magnetic gear box using contra-rotating input shafts[J].IEEE Transactions on Magnetics,2011,47(2):431-438.
[8]吉敬华.一种输出推力脉动减小的嵌入式磁力丝杠:201510559344.0[P].2015-12-23.
[9]张海,郑果,张小东,等.永磁丝杠推力及其影响因素研究[J].河南理工大学学报(自然科学版),2016,35(6):835-840.
[10]王琦.磁力丝杠副[J].制造技术与机床,1996(10):37-38.
[11]陈循介.磁力丝杠[J].世界制造技术与装备市场,1996(3):63.
[12]PAKDELIAN S,FRANK N W,TOLIYAT H A.Principles of the trans-rotary magnetic gear[J].IEEE Transactions on Magnetics,2013,49(2):883-889.
[13]高放.永磁-感应子式磁力丝杠的电磁特性研究[D].哈尔滨:哈尔滨工业大学,2015:14-17.
[14]郑果.永磁丝杠传动特性及磁极结构研究[D].焦作:河南理工大学,2016:16-18.