The function of inductance

Inductance is a physical quantity that considers the electromagnetic induction ability caused by inductance coils. Give an inductor coil into the current, the inductor coil periphery into the electromagnetic field, the inductor coil will have magnetic flux through. The larger the power supply into the inductor coil, the stronger the electromagnetic field and the greater the magnetic flux passing through the inductor coil. The experimental results show that the magnetic flux passing through the inductor coil is proportional to the incoming current, and their ratio is called self-inductance, also known as inductance. Next, let's get to know each other together with Dongguan Inner Winding Machine Company.

Inductor in the circuit mainly plays the functions of filtering, concussion, delay, trapping and so on, and then has the functions of brushing and selecting data signals, filtering noise, stabilizing current and restraining the influence of electromagnetic waves. The most common function of inductor in the circuit is to form a LC filter circuit together with capacitance. The capacitor has the performance of "blocking DC and AC", while the inductor has the function of "DC and AC resistance". If the DC voltage accompanied by a lot of electromagnetic interference goes through the LC filter circuit, then the AC electromagnetic interference will be consumed by inductance; when the purer DC current passes through the inductor, the AC electromagnetic interference in it will also become magnetic inductance and heat, and the higher working frequency will be most easily impeded by inductance, which can restrain the higher frequency electromagnetic interference.

With the rapid and rapid development of the communications industry, the industry market is becoming more and more lightweight, so the existence of chip inductors brings growth space for miniaturized inductors. However, at this stage, the shape of the inductor has been reduced to the physical limit, so it is necessary to go through integration to reduce its size and save cost. Integration will also be the most critical development trend in the future. According to the construction method, the main inductors are laminated inductors and wound inductors, and many layers of spiral laminated inductors are made in ferrite, that is, many layers of circuits are sealed in ferrite, and many layers of circuits form inductor coils. The laminated inductor is small, common materials can achieve a minimum specification of 0201, and the price is low, so it is suitable for scenarios with small size and low demand. Why the demand is not high, the fundamental reason is that the accuracy of the laminated inductor is ordinary, the Q value is low, the current is not large, and there is no problem in common clutter filtering and RF pairing. The laminated inductor looks similar to the patch capacitor and resistor, with pads on both sides and a gray or white rectangle in the middle, with no inductor coil visible.

The above is the role of inductors arranged by the winding company in Dongguan. I hope it will be helpful to you.