电感在电路中的作用

The role of inductor in the circuit

基本作用：滤波、振荡、延迟、陷波等；

Basic functions: filtering, oscillation, delay, trap and so on.

形象说法：“通直流，阻交流”；

Image statement: "through direct current, resistance to communication";

细化解说：在电子线路中，电感线圈对交流有限流作用，它与电阻器或电容器能组成高通或低通滤波器、移相电路及谐振电路等；变压器可以进行交流耦合、变压、变流和阻抗变换等。

Detailed explanation: in the electronic circuit, the inductance coil acts on the AC limited flow. It can form high pass or low pass filter, phase shift circuit and resonant circuit with resistor or capacitor. Transformer can be AC coupled, variable voltage, variable current and impedance transformation.

由感抗XL=2πfL知,电感L越大，频率f越高，感抗就越大。该电感器两端电压的大小与电感L成正比，还与电流变化速度△i/△t成正比。

By the inductive XL=2 PI fL, inductance L the greater frequency of F is higher, the greater the inductance. The voltage across the inductor and inductance is proportional to the size of L, but also with the current change rate is proportional to the delta i/ delta t.

电感线圈也是一个储能元件，它以磁的形式储存电能，储存的电能大小可用下式表示：WL=1/2Li2。可见，线圈电感量越大，流过越大，储存的电能也就越多。

The inductance coil is also a energy storage element, which stores electrical energy in the form of magnetic. The size of the stored energy can be expressed in the lower form: WL=1/2Li2. It can be seen that the greater the inductance of the coil, the larger the flow, the more electric energy is stored.