RL串联电路中振荡的研究  

Studies on Oscillation in RL Series Circuit

作　　者：霍伟刚[1] 王玉新[1] 赵瑜航 张纳倩 李悦欣 张艺严 HUO Weigang;WANG Yuxin;ZHAO Yuhang;ZHANG Naqian;Li Yuexin;ZHANG Yiyan(College of Physics and Electronic Technology,Liaoning Normal University,Liaoning Dalian 116029)

机构地区：[1]辽宁师范大学物理与电子技术学院,辽宁大连116029

出　　处：《大学物理实验》2019年第2期11-14,共4页Physical Experiment of College

基　　金：辽宁省自然基金(20170540571);辽宁师范大学创新训练项目(201621010722);辽宁省教育厅教学改革研究项目(LNJG2016438)

摘　　要：在RL电路暂态特性研究实验中,发现电感(电阻)电压也会呈现振荡现象。目前对RL电路中电感(电阻)电压呈现的振荡现象研究较少。本文实验研究了RL电路的振荡现象,发现振荡出现的两个条件:(1)只有在电阻阻值为兆欧量级时,振荡现象才会出现,且随着电阻或电感值的增加电压振荡增强;(2)示波器输入阻抗为1MΩ时电压振荡出现,阻抗为50Ω时振荡消失。最后给出了相应的物理解释。In experiment of study on transient characteristics of RL series circuit,it was found that inductance(resistance) voltage has oscillation.Presently,there is less research on oscillation in RL series circuit.In this paper,this oscillation was experimentally studied.It was found that(1) oscillation does not appear until the resistance is increased to Mega-ohm magnitude,and oscillation increases with the increase of the resistance.(2) another condition for oscillation is that the input impedance of oscilloscope must be 1MΩ,not 50Ω.The corresponding physical explanations are also given.

关 键 词：RL电路 暂态特性 振荡 示波器输入阻抗 

分 类 号：G642.0[文化科学—高等教育学]