BI Technologies HM72B Series Inductors

BI Technologies HM72B Series Inductors are high power, high performance molded surface mount inductors. BI Technologies HM72B Series Inductors have an operating temperature range of -40oC to +130oC, and a maximum temperature rise of +50oC. HM72B Series Inductors from BI Technologies also has an operating frequency of up to 3 MHz.

Inductor

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 the inductor is generally composed of a skeleton, a winding, a shield, a packaging material, a core, and a magnetic core!

What is the role of the inductor?

1. The role of inductors in alternating current

In an alternating current, an alternating current flows into the inductor, at which point the inductor blocks its change. It won't make it big at once and it will slowly increase. When the AC power is lost, the inductor will not let it disappear at once, but slowly let it slowly become smaller until it is completely lost!

This process can be seen clearly by the brightness of the incandescent lamp. In the AC circuit, the inductor, incandescent lamp, switch, etc. are connected in series in the circuit. When the switch is closed, the incandescent lamp does not light up instantly, but from dark to bright. When the switch is turned off, the incandescent lamp does not suddenly go out. It turns from bright to dark. The whole process is very good to see that the working function of the inductor is to refuse to stay. The conversion of electrical energy into magnetic energy, and then magnetic energy to convert electrical energy, the two processes, the former is the incandescent lamp from dark to bright, the latter from bright to dark.

2, inductive filtering

In a DC circuit, when a current flows through the inductor, an induced magnetic field is generated in the coil instantaneously, and the magnetic field induces a current, and the induced current and the current flowing in the opposite direction prevent the external current from flowing. The current flowing through is stabilized, and the induced magnetic field does not change any more, so that the direct current can flow smoothly. From this process, we can see that the inductance actually hinders the change of current. When the alternating current is passed, since the current of the alternating current changes at the moment, the inductance always resists with this change, hindering the passage of the alternating current.

The blocking effect of the inductor on the alternating current is called the inductive reactance. It is related to the frequency and inductance of the alternating current. The higher the alternating frequency, the larger the inductance and the greater the inductive reactance. With this characteristic, we often use it in the power supply filtering. The above figure is a π-type filter circuit composed of a capacitor and an inductor. Since the DC signal after capacitor filtering has some small fluctuations, the inductor can block the current change, so that it can suppress these small fluctuations. Output more pure DC power.

3, the other role of the inductor

In addition to the above blocking and filtering effects, the inductor also has the function of suppressing electromagnetic interference, filtering signals, stabilizing current, and filtering noise.

Tag: Inductor

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