基于有限元法的动磁式直线压缩机动态特性.PDFVIP

2008, 35 ( 6 ) 研究与设计 EM CA 基于有限元法的动磁式直线压缩机动态特性 刘晓辉 , 　李志海 , 　郑水英 (浙江大学 化工机械研究所 ,浙江 杭州 　3 10027 ) 　　摘 　要 : 针对动磁式直线压缩机模型样机建立了基于有限元的磁固耦合动态特性分析模型 。该模型考 虑了磁路的非线性特性 、漏磁通及永磁体位置等因素的影响 , 因此比传统的等效磁路模型更完整 。给出了部 分分析结果 ,表明了电机推力 、位移和电流之间的相互关系 ,还给出了几个在不同电压 、不同时刻下的矢量磁 通密度图 ,直观地显示了磁场的分布特点及磁路的饱和特性 ,为直线压缩机的优化设计奠定了基础 。 关键词 : 直线压缩机 ;动磁式 ;有限元 ;磁场 中图分类号 : TM 30 1. 4; TH45　文献标识码 : A 　文章编号 :(2008) 06000 104 D ynam ic Character istic s of M ov ingM agnet L inear Com pressor Ba sed on F in ite E lem en t M ethod L IU X iaohu i, 　L I Z h iha i, 　ZHEN G S hu iy ing ( In stitu te of Chem ical M ach inery, Zhej iang U n iversity, H angzhou 3 10027 , Ch ina) 　　Ab stract: A m agnetism and so lid coup ling dynam ic analysis model wa s e stab lished by fin ite elem en t m ethod for a model of movingm agnet linear comp re ssor. In th ismodel, the influence of the non linearity of m agnetic circu it, leak m agnetic flux and the po sition of the m agnet wa s con sidered. So it is more in tegrity than the model of equ ivalen t m ag netic circu it. Som e analysis re su ltswere p rovided in th is article, indicating the relation sh ip among the electrom agnetic force, disp lacem en t of p erm anen t m agnet and cu rrent. B e sides, som e m agnetic flux den sity draw ings of different volt age and different tim e were given too, there indicating the distributing characteristic s of the electrom agnetism field and saturation characteristics of m agnetic rou te. Th is an slysis lays the foundation for op tim ization design of linear comp re s sor. Key word s: linear com pressor; m ov ingm agnet; f in ite elem en t; m agn etic f ield