Measurement of mutual inductance from the frequency dependence of impedance of AC coupled circuits using a digital dual-phase lock-in amplifier

被引：13

作者：

Schauber, Michael J. ^{[1
]}

Newman, Seth A. ^{[1
]}

Goodman, Lindsey R. ^{[1
]}

Suzuki, Itsuko S. ^{[1
]}

Suzuki, Masatsugu ^{[1
]}

机构：

[1] SUNY Binghamton, Dept Phys, Binghamton, NY 13902 USA

来源：

AMERICAN JOURNAL OF PHYSICS | 2008年 / 76卷 / 02期

关键词：

D O I：

10.1119/1.2820391

中图分类号：

G40 [教育学];

学科分类号：

040101 ; 120403 ;

摘要：

We present a simple method for determining the mutual inductance between two coils in a coupled AC circuit using a digital dual-phase lock-in amplifier. The frequency dependence of the real and imaginary parts is measured as the coupling is changed. The mutual inductance decreases as the distance d between the centers of coils is increased. We show that the coupling is proportional to d(-n) with n approximate to 3. This coupling is similar to that of two magnetic dipoles.

引用

页码：129 / 132

页数：4