用数字双相锁相放大器从AC耦合电路阻抗的频率特性测量互感
Measurement of mutual inductance from frequency dependence of impedance of AC coupled circuit using digital dual-phase lock-in amplifier
摘要：
提出了一种利用数字双相锁相放大器确定耦合交流电路中两线圈间互感$M$的简单方法。当耦合常数改变时，测量实部和虚部的频率依赖性。互感$M$随着线圈中心之间的距离$d$的增加而减小。我们发现，耦合常数与$d^{-n}$成正比，指数为$n$（$\approx$ 3）。这种耦合类似于通过偶极-偶极相互作用耦合的两个磁矩的耦合。
英文摘要：
We present a simple method to determine the mutual inductance $M$ between two coils in a coupled AC circuit by using a digital dual-phase lock-in amplifier. The frequency dependence of the real and imaginary parts is measured as the coupling constant is changed. The mutual inductance $M$ decreases as the distance $d$ between the centers of coils is increased. We show that the coupling constant is proportional to $d^{-n}$ with an exponent $n$ ($\approx$ 3). This coupling is similar to that of two magnetic moments coupled through a dipole-dipole interaction.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
