双向交链横向磁通圆筒型直线永磁同步电机的基础研究

Basic Research on Bidirectional Crosslinking Transverse Flux Tubular Linear Permanent Magnet Synchronous Motors

提出双向交链横向磁通圆筒型直线永磁同步电机的方案,克服了传统横向磁通永磁电机初级空间利用率不高的缺陷。初级铁心单元加工方便,能够充分利用次级永磁体,提高电机的空载感应电动势。介绍电机的结构并阐述其工作原理,利用磁路法建立了电机的三维等效磁网络模型,获得了空载主磁通和空载反电动势表达式,推导出了电机的推力表达式,通过三维有限元方法计算了电机磁场,研制了一台实验样机,进行了空载感应电动势和静态推力的测试实验。理论分析与实验结果基本吻合,验证了理论分析的有效性。

A bidirectional crosslinking transverse flux tubular linear permanent magnet synchronous motor was presented, which had larger space utilization ratio than traditional transverse flux machine. The primary core unit can make full use of secondary permanent magnets, and effectively increase no-load back-EMF, with the features of easy manufacture. The structure and driving principleof this motor were introduced. The three-dimensional magnetic circuit model was established and the analytical expression of no-load back-EMF and the thrust were derived. In additional, the magnetic field and thrust were analysised by 3-D finite element method. A prototype was designed and manufactured. The back-EMF and static thrust experiments were carried out. The theoretical analyses fit the experiment results well. That verified the validity of the theoretical analysis.