Wire-wound inductance Wide range of inductance (mH~H), high inductance precision, low loss, low cost; Compared with the winding inductor, the laminated inductor is small in size, the magnetic circuit is closed, and will not interfere with the surrounding components. The laminated integrated structure, high reliability, good heat resistance, good weldability, and regular shape are suitable for automatic surface installation and production. The shortcomings are high cost and small inductance.

The role of winding inductance. Basic functions: filtering, oscillation, delay, notch, etc. Image statement: "pass DC, block AC"

In the electronic circuit, the inductor acts on the AC finite current, and it can form high-pass or low-pass filters, phase-shifting circuits and resonant circuits with resistors or capacitors. The transformer can carry out AC coupling, voltage change, current change and impedance change.

The role of the chip winding inductor seems to be somewhat opposite, we said that the capacitor is a direct resistance, and the inductor is just the opposite, its role is a direct resistance, originally! The direction of the magnetic field generated when the direct current passes through the inductor is consistent and does not change. The alternating current is positive and negative changes, so the magnetic field will also change, because from positive (negative) to negative (positive) is a very short time, assuming that the first positive potential and rising, then the magnetic field around the inductor continues to increase, to the top is the maximum, then the potential begins to decline, because there is a magnetic field around, the inductor will convert the surrounding magnetic field into electrical energy, The power can be maintained for a period of time, and vice versa, thus preventing the passage of alternating current.