FAQ

What is inductance and what is its function?

A: inductor is a component that can convert electrical energy into magnetic energy and store it. The structure of the inductor is similar to that of a transformer, but has only one winding. The inductor will try to prevent the current from flowing through it when the circuit is connected when there is no current passing through it; when the circuit is disconnected when there is a current flowing through it, it will try to keep the current constant when the circuit is disconnected.

In the circuit, the inductor mainly plays the role of filtering, oscillation, delay and notch, as well as filtering signal, filtering noise, stabilizing current and suppressing electromagnetic wave interference. The most common function of inductance in the circuit is to form LC filter circuit together with capacitance, which has the function of "connecting DC and blocking AC".

Q: what is the unit of inductance and how to convert it?

Answer: 1. The symbol of inductance in the circuit: l;

2. Inductance unit: Heng (H), millihenge (MH), micro Heng (μ h);

3. The conversion relationship is: 1H = 10 ^ 3mh = 10 ^ 6 μ H = 10 ^ 9nh;

Q: how to express the tolerance of inductance?

Answer: inductance tolerance is usually expressed in letters, with 20% error value expressed by M; 10% error value expressed by K; 5% error value expressed by J; and 1% error value expressed by F. For example, 100 m is 10 μ h, and the error is 20%. In the calculation of inductance error, the maximum allowable deviation of inductance in the circuit refers to the allowable error between the nominal inductance on the inductor and the actual inductance.

Q: what are the magnetic cores of SMD inductors?

A: common chip type inductor cores are: MnZn ferrite, Ni Zn ferrite, magnetic powder core, etc.

Q: what are the main classifications of inductors?

Answer: according to the working frequency classification: divided into high frequency inductance, intermediate frequency inductance, low frequency inductance

Classified by structure: fixed inductor and adjustable inductor

According to their functions: filter inductor, current blocking inductor, oscillation inductor, isolation inductor, etc

According to package form: chip inductor, plug-in inductor