线圈固有品质因数与LC回路空载品质因数的关系  

The Relation between the Unloaded Q Factor of LC Resonant Circuit and the Intrinsic Q Factor of Inductor Coil

作　　者：陈晓华[1] 李子竞[1] 

机构地区：[1]西安交通大学电子与信息工程学院,陕西西安710049

出　　处：《电力学报》2007年第2期187-189,192,共4页Journal of Electric Power

摘　　要：根据品质因数的定义,得出了线圈内阻不能忽略时,LC回路的空载品质因数QP与线圈固有品质因数Q0的关系:QP=Q20-1(1+1/Q0),当Q0 1时,有QP=Q0。同时指出,用传统的串并联阻抗等效的方法计算出的QP的值是不准确的。从而为在低Q值下的计算提供了1个更为准确的结果,进一步明晰了品质因数的概念。Based on the definition of Q factor, wnen the loss of inductor should be considered, the tie between the unloaded quality factor QP of LC resonant circuit and the intrinsic quality factor Q0 of inductor coil is： QP = √（Q0^2 - 1） （ 1 ＋1/Q0 ）, QP = Q0, while Q0〉〉1. Meanwhile, it has been indicated that QP calculated is inaccurate by using traditional equivalent impedance theorem. So it provides a more accurate outcome on low Q factor calculation, further clarify ing the concept of Q factor.

关 键 词：线圈 品质因数 LC谐振回路 阻抗等效 

分 类 号：TN911.1[电子电信—通信与信息系统] TM131.4[电子电信—信息与通信工程]