磁势自平衡回馈补偿式直流传感纹波抑制研究  

Ripple restraint of DC sensor based on the magnetic potential self-balance and fed-back compensation

作　　者：任士焱[1] 马爱清[1] 任琳[2] 吴波[1] 

机构地区：[1]华中科技大学电气与电子工程学院,湖北武汉430074 [2]中国地质大学图书馆,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2005年第4期70-72,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50277018).

摘　　要：基于磁势自平衡回馈补偿式直流传感机理,导出了磁势自平衡回路的电流波形曲线.根据铁芯近似矩形磁化曲线的特性,通过对电流波形的分析,拟合了描述电流波形的函数表达式,电流波形函数为不连续函数且有周期性.利用傅里叶级数对其进行了频谱分析,计算了次数小于19次的各次谐波电流均方根值的频谱数据.从频谱分析结果可知,在各次谐波中,基波占主导地位.主要考虑基波分量,分析并计算了滤波电感的数值.系统加入33mH的电感后,纹波系数由1.0 2 5减小到0 .15 0 .Based on magnetic potential self-balance and fed-back compensation the curve of the magnetic potential self-balance current was gained. According to the rectangle characteristic of cores′ magnetic curve, the wave equation of current was educed by analyzing the current wave. The wave equation is discontinuous and periodic. Using Fourier series,the frequency spectrum analysis was analyzed, and spectrum data of harmony wave less than 19 were calculated. The fundamental wave is dominant in all harmony waves in conclusion. The value of the filter inductance was calculated based on the results of the frequency spectrum analysis. With a 33mH filter inductance, the ripple coefficient reduced from 1.025 to 0.150.

关 键 词：直流传感器 磁势自平衡 回馈补偿式 频谱分析 纹波抑制 

分 类 号：TM933[电气工程—电力电子与电力传动]