磁势自平衡回馈补偿式直流传感器频响特性研究  

Research on Frequency Response of DC Sensor Based on Magnetic Potential Self-balance and Feed-back Compensation

作　　者：任士焱[1] 钟丹[1] 

机构地区：[1]华中科技大学电气与电子工程学院,武汉430074

出　　处：《仪器仪表学报》2005年第z1期142-143,共2页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(50277018)资助项目

摘　　要：给出一种由磁势自平衡回路和差值电流补偿回路组成的新型直流传感器的数学模型,运用MATLAB软件研究了其幅频响应和相频响应特性。仿真结果说明在截止频率ω=1000以内,幅频特性曲线平坦,该传感器工作稳定。仿真也表明,补偿绕组阻抗增益越大,截止频率越高。因此减小补偿绕组的直流电阻,即增大其阻抗增益,可以扩展系统的频带宽度。It presented a mathematical model for DC sensor which consists of magnetic potential self-balance andfeed-back compensation loops.The software MATLAB has been applied to analyze the amplitude and phase fre-quency reponse characteristics.The simulation results show that the DC sensor has good stability as the cut-offfrequency is less than 1000.And the cut-off frequency is higher while the compensation winding impedance gain islarger.The bandwidth can be expanded by decreasing the compensation winding DC resistance or increasing theimpedance gain.

关 键 词：磁势自平衡 直流传感器 建模 频率响应 

分 类 号：TH7-55[机械工程—仪器科学与技术]