Inductors are energy storage components that convert electrical energy into magnetic energy storage.It is similar to a transformer, but the inductor has only one winding.The structure of inductors is generally composed of skeleton, winding, shielding cover, packaging material, iron core and magnetic core!
Inductor commonly known as the inductor, is essentially a coil, there are hollow coil also have a solid coil, solid coil has iron core or other materials made of the core, the unit of the inductance is "H", referred to as "heng".In addition, the smaller units are mH, uH, and their conversion method is 1H=1000mH=1000000uH.
What is the use of an inductor?
1, the role of inductors in alternating current
In alternating current, the alternating current flows into the inductor, and the inductor prevents it from changing.I'm not going to make it big all at once but I'm going to make it bigger and bigger.When alternating current is lost, the inductor does not let it lose all of a sudden, but slowly let it slowly become smaller until completely lost!
This process can be seen clearly by the change in brightness of the incandescent lamp.In the ac circuit, inductors, incandescent lamps, switches and so on are in series in the circuit. When the switch is closed, the incandescent lamp will not instantly become bright, but from dark to bright. When the switch is disconnected, the incandescent lamp will not suddenly go out, but from light to dark.The whole process is good to see that the job of the inductor is to refuse to stay.The conversion of electrical energy into magnetic energy, and then magnetic energy into electrical energy, the former is the incandescent lamp from dark to bright, the latter from light to dark.
2. Inductive filtering
In dc, when a current flows through the inductor, moment can produce induced magnetic field in the coil, the magnetic field and induced current, current of induction and the flow of current in the opposite direction, will hinder the external current flows, once through the current stabilized, induced magnetic field won't change, in order to let the dc current flow smoothly.From this process, we can see that the inductance is actually blocking the change of the current, and when through the alternating current, because the current of the alternating current changes at any time, the inductance always keeps resisting this change, blocking the flow of the ac current.
Inductance of communication effect is called impedance, and the frequency of the alternating current (ac) and inductance, the higher the frequency of communication, the greater the inductance, inductance, the use of this feature, it is often used in the power supply filter, we pictured above is a PI type filter circuit of capacitance and inductance, because after a capacitor filter dc signal there will be some small fluctuations, and inductance can hinder the current changes, so that it can restrain the small fluctuations, thus more pure dc output.
3. Other functions of inductors
In addition to the above blocking and filtering functions, inductors also have the functions of suppressing electromagnetic interference, filtering signals, stabilizing current and filtering noise.
Resistance traffic straight
For dc, inductance is equivalent to short circuit;For alternating current, the inductance is to its hindering effect, the higher the frequency of alternating current, the greater the hindering effect of inductance to it.
Above is the introduction of inductance, we are a Chinese inductance manufacturer, products: axial inductor, fixed inductor, SMD inductor and other products, welcome to consult ~
Post time: Apr-18-2020