摘要
针对单对极结构磁阻式旋转变压器因其磁路缺少补偿,导致偏心等因素对其精度影响较大的问题,提出一种新结构的轴向磁场一对极磁阻式旋转变压器,其磁路具有补偿优势,从而解决偏心带来的误差问题.原理样机定子采用激磁绕组与信号绕组所在平面正交设计,转子无绕组且采用斜环状导磁结构设计.采用磁路解析方法分析表明:改变定转子磁路耦合面积可以改变旋变磁路磁阻;适当选择斜环导磁带形状函数可优化输出电势函数波形,达到使之呈现正弦变化的目的.针对激磁磁路呈现轴向磁场的特殊性,采用三维暂态磁场有限元方法对其信号绕组输出电势特性进行了分析,得到与解析分析一致的结论,证明了原理样机变磁阻原理与结构设计思想的正确性.
The mechanical eccentricity makes much more influence on precision of one pair pole reluctance resolver. One pair pole axial flux reluctance resolver with new magnetic structure is put forward, which has compensating character inside its two side air gap. The prototype has both exciting windings and signal windings in its stator, which are vertical to each other. There is no winding in its rotor and one inclined ring is set in it. By using analytical method, the conclusion is got that the resistance of the reluctance resolver is varied by changing its electro-magnetic coupling area. At the same time, by selecting appropriate shape of the inclined ring of rotor, the output sine and cosine signal of the EMF is optimized. To analyze the axial flux through the stator and the rotor, 3D transient FEM is used. The character of the EMF in signal windings is got at the same time. The FEM result agrees well with the analytical result, this will offer us the basic parameters for the further analysis in the future.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2011年第11期70-74,共5页
Journal of Harbin Institute of Technology
基金
国家自然科学基金资助项目(50977015)
