摘要
提出了一种新型绕组结构两相双凸极永磁电机(TDSPM)。该新型电机的结构与现存的三相双凸极永磁电机(DSPM)相同,与后者不同的是,其绕组结构临近线匝跨越三个定子极,并且只形成两相。分析了该新型电机的工作原理,以一台1.8kW的TDSPM电机为例,建立了其动态物理模型。基于有限元法,调查了该新型电机的特点,包括气隙磁通密度分布以及两相绕组磁链。进一步结合实验验证,结果显示。与现存的DSPM电机相比,TDSPM的非工作定子凸极上有更少的漏磁。并且其相磁链具有非对称和双极性的特性,以及更大的变化率,从而,可以获得更高的反电动势,这使得该新型电机具有更高的功率密度以及绕组和空间利用率。进一步基于建立的动态物理模型,动态分析被执行,验证了提出的两相TDSPM电机不存在零扭矩区域,在任何位置可以起动。然而,由于双凸极的结构特征,仍然存在输出扭矩波动的缺陷。
A novel two-phase doubly-salient permanent magnet motor with new windings configuration（TDSPM） is proposed in this paper. The structure of TDSPM is the same to that of well-known three-phase doubly salient permanent magnet machine（DSPM）. But it is different from the latter in that two adjacent turns in a phase winding span three stator salient poles and only two phases winding is formed. The physics model of the TDSPM with 1.8kW output power is derived analytically. On basis of the finite element analysis, the feature of proposed machine is investigated, including air-gap flux distribution and flux linkage of per phase winding. Results show that there is less leakage flux around the idle stator poles for TDSPM than DSPM. Further, the bipolar and asymmetrical flux linkage for the proposed TDSPM is revealed, which has a steeper slope than that for the DSPM. Hence, it exhibits the higher flux rate, better torque density, materials and space utilization compared with the DSPM. Finally, the dynamic analysis is carried out with the derived physical model. It is shown that there is no zero torque zones, so starting is not a problem for the proposed TDSPM. There still exists the torque ripple due to the configuration with the doubly salient pole.
出处
《电工技术学报》
EI
CSCD
北大核心
2013年第9期310-320,共11页
Transactions of China Electrotechnical Society
关键词
双凸极永磁电机
两相电机
新绕组结构
永磁电机
开关磁阻电机
Doubly-salient permanent magnet motor（DSPM）, two-phase electric machine, newwindings configuration, permanent magnet electric machine, switched reluctance motor（SRM）
