1. Where the inductor is used

   Pay attention to humidity and dryness, high and low ambient temperature, high-frequency or low-frequency environment, and whether the inductor should show inductive or impedance characteristics.

2. Frequency characteristics of inductance

    At low frequencies, inductors generally exhibit inductance characteristics, which only accumulate energy and filter high frequencies. But at high frequencies, its impedance characteristics are very obvious. There are phenomena such as energy consumption and heat generation and reduced inductive effects. The high frequency characteristics of different inductors are different.

    The following is an explanation of the inductance of ferrite materials: Ferrite materials are iron-magnesium alloys or iron-nickel alloys. This material has a high magnetic permeability. It can be the case of high frequency and high resistance between the coil windings of the inductor. The capacitance generated by the bottom is the smallest. Ferrite materials are usually used in high-frequency situations, because they are mainly inductance characteristics at low frequencies, making the line loss very small. In the case of high frequency, they mainly show reactance characteristic ratio and change with frequency. In practical applications, ferrite materials are used as high frequency attenuators for radio frequency circuits. In fact, ferrite is better equivalent to the parallel connection of resistance and inductance. The resistance is short-circuited by the inductance at low frequencies, and the impedance of the inductance becomes quite high at high frequencies, so that all current flows through the resistance. Ferrite is a consuming device on which high-frequency energy is converted into heat, which is determined by its resistance characteristics.

    3. The maximum current that the inductor is designed to withstand, and the corresponding heat generation.

    4. When using a magnetic ring, compare the magnetic ring part above to find the corresponding l value and the use range of the corresponding material.

    5. Pay attention to the wire (enameled wire, yarn covered or bare wire), commonly used enameled wire. To find the most suitable thread warp.