大学物理 ›› 2016, Vol. 35 ›› Issue (6): 29-32.

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电感频率特性及在RLC 串联谐振电路中的应用

陈国杰,陈 奎,周有平,李 斌   

  1. 佛山科学技术学院理学院,广东佛山 528000
  • 收稿日期:2015-08-31 修回日期:2015-11-12 出版日期:2016-06-20 发布日期:2016-06-20
  • 作者简介:陈国杰(1965—),男,湖南祁东人,佛山科学技术学院理学院教授,博士,主要从事物理电子教学与研究工
  • 基金资助:
    大学物理实验 广东省教学团队资助

Inductor frequency characteristic and its application in RLC series resonant circuit

CHEN Guojie,CHEN Kui,ZHOU Youping,LI Bin   

  1. School of Science,Foshan University,Foshan,Guangdong 528000,China
  • Received:2015-08-31 Revised:2015-11-12 Online:2016-06-20 Published:2016-06-20

摘要: 分析了电感频率特性对RLC 串联谐振的影响,介绍了一种快速估测谐振频率的方法;导出了R 和LC 谐振曲线半高宽的数学式,讨论了其适用条件.自制了高Q 电感,实验与理论相符.结果表明,电感的QL 越大、rL 越小,则谐振曲线半高宽越小,测量越准;在负载R>0.64 rL 条件下,LC 谐振曲线比R 谐振曲线窄.

关键词: RLC 电路, 谐振, 电感, 频率特性, 品质因数

Abstract: The influence of inductor frequency characteristic on a RLC series resonant circuit is analyzed,and a method of roughly measuring the resonant frequency is introduced. The equations of the resonant curve half-peak bandwidths for the load resistor and LC component are derived,and the applying conditions of the equations are also discussed. Then,an inductor with high quantity factor is fabricated,and the experimental results are in agreement with the theoretical analysis. The results show that the higher the inductor’s Q is and the smaller the rL is,the narrower the resonant curve half-peak bandwidth is and the more accuracy the measurement is. In addition,the resonant curve of the load resistance is narrower than that of LC component when R is greater than 0.64 rL .

Key words: RLC circuit, resonance, frequency characteristic, quantity factor