Lan Transformers Process

In the production of Lan transformers, the magnetic materials and transformer windings of the network transformers need to be designed first:

There are three main types of magnetic materials and transformer designs. One is a power frequency transformer composed of silicon steel sheets, a ferrosilicon aluminum iron powder core magnetic ring, and the other is a magnetic ring composed of manganese, zinc, nickel, and zinc materials. The three types are used in different occasions. Among them, silicon steel sheets are mainly used for power frequency transformers, because the U value is near 1.5K, which is moderate, and the Bsat value is large, reaching 1.5T, so the anti-magnetic saturation strength. Sendust core materials have a low U value, generally around 100, and the B value is smaller than that of silicon steel sheets, but much larger than that of high-conductivity materials (manganese-cored nickel-zinc). It is mainly used in occasions with large DC components. For example, it is used in BUCK continuous current circuit. The manganese core nickel-zinc magnetic permeability is very high, up to 10K, so the coupling is very good, mainly used for small signal coupling transmission. Such as drive signal and voltage and current sampling. This material can meet the inductance requirements and suitable excitation current by winding a few turns.

The first thing to consider in the manufacturing process of the network transformer is the basic parameters of the network transformer. Among them, there are many details that need to be dealt with. The four frequency indexes of the network transformer are the most important indicators to measure the relevant performance of the network transformer. Today, we Let's talk about the common mode rejection of the network transformer first:

The definition of "common mode" interference refers to the potential difference between the power line and the earth, or the neutral line and the earth.

For a three-phase circuit, common mode interference exists between any phase and the earth. Common mode interference is sometimes called longitudinal mode interference, asymmetric interference or ground interference, which is the potential difference between the current-carrying conductor and the ground. The difference between it and differential mode is that differential mode interference exists between the power phase line and the neutral line.

Common mode interference often refers to the common signal interference loaded on each input signal interface section at the same time.

Common mode interference is transmitted between the signal line and the ground, which is asymmetrical interference.

Common mode interference is like two people pushing you forward or backward at the same time, while the relative differential mode interference is pulling you one after the other.