What is the skin effect? ​​The skin effect of the current - Solutions - Huaqiang

Harness probe HRS150-H can be customized for other specifications

MOSFET imported original FET

Murata muRata winding inductance original authentic assured purchase

When an alternating current passes through the conductor, the current will concentrate on the surface of the conductor, a phenomenon known as the skin effect. In order to effectively utilize the conductor material and dissipate it, the large current busbar is often formed into a trough or a diamond shape. In addition, in the high-voltage transmission and distribution line, the steel stranded wire is used instead of the aluminum stranded wire, which saves the aluminum conductor and saves the aluminum conductor. Increased mechanical strength of the wire.

The skin effect is one of the most basic distortion processes in the signal line, and it may be the most overlooked. With the exaggerated propaganda of the general signal line, the skin effect does not change all the sorghum signals, and will not cause any loss of related kinetic energy, just the opposite. The skin effect does cause inconsistencies in the transmission of sorghum signals due to the different components of the conductor. Similarly, on old harness conductors, the skin effect encourages the interaction of signal currents on multiple harnesses, creating a harsh mark on the sound.

Current skin effect

The electrons always flow along the path of least resistance in the conductor. The structural elements on the surface of the conductor and the near surface layer are substantially parallel to the surface of the conductor, and the electron displacement resistance between the electrons is small. In the inner structure of the conductor, the structure elements are arranged in up, down, left and right, front and back spaces. The electrons are oriented in the direction of the five-direction resistance. (On the surface, there are only three directions of resistance.) It is seen that the resistance of electrons running near the surface of the conductor is higher than that. It is much smaller inside, which leads to the skin effect of the current.

Second, when the electron moves within the wire, the magnetic field is accompanied by a magnetic field in the vertical direction of its motion. (Right-hand ruled) other electrons gradually move toward the periphery under the action of the magnetic field, and then move toward the surface layer of the wire to form The skin effect of the current.

Third, of course, the effect of temperature: inside the conductor, the heat generated by the resistor is not easy to dissipate, the temperature is high, the rate of price and electron operation is high, and the line is not very flat, which leads to a relatively narrow electronic path, and the resistance is high. On the surface of the conductor, the heat dissipation is fast, the temperature is low, the rate of price and electron operation is low, and the line is flat, which leads to a relatively large electronic path, and thus the surface resistance of the conductor is small, and the external electrons operate faster, which is also the current skin collection. one of the reasons. Tip discharge When a part of the conductor is made very thin and pointed, the surface area of ​​the tip portion is relatively large, the electron density at which the transposition moves to it is relatively large, and the tip portion is even crowded, and some electrons are crowded from the tip. Overflowing causes a tip discharge phenomenon.