XP Inductors And Transformer

LCD itself will not light, you want to display data and images, you must use a white backlight. White light backlight is generally composed of a number of white LED, LED number determined by the size of the screen, the drive is mainly used inductor boost DC / DC to achieve, LED series together, the same drive current to ensure that each LED brightness , The same color.

1. With a long piece of copper or aluminum foil in the high frequency transformer outside the primary winding, wrapped around a circle, but the end can not touch (short circuit), with welding or tight way to lead to ground. Its inside and outside have an insulating layer, in its outside around the secondary winding.

The magical effect of the soft magnetic material is not to be said, it can rely on the smallest external magnetic force to achieve maximum magnetic field strength. In some cases is essential to a necessary material. In the differential mode interference, soft magnetic material is such an important material. This paper will introduce the working principle of filter inductor and its requirement for soft magnetic material in differential mode interference.

Common mode inductance is around the same core in the same number of turns, wire diameter equal to the opposite to the two sets of coils. A differential mode inductor is a coil wound around an iron core.

Most of the home power amplifier power supply using a toroidal transformers . Ring transformer has a small magnetic leakage, high conversion efficiency, wide frequency response characteristics, can improve the amplifier sound quality. If the toroidal transformer burned, and can not buy the original model to replace, then only take the method of manual winding system to copy. The following manual winding method.

For inductance selection considerations in DC / DC switching converters, size, equivalent resistance, and current capacity typically determine differential mode choke coil selection, and can also include design factors such as cost, lead time, and technical support; and It is generally believed that under the same conditions, in order to reduce the internal lossesof the inductor device, the use of smaller ESR (equivalent series impedance) value of the inductor is the best. But the actual situation needs more consideration, this paper attempts to give a better compromise.

Electrons in the conductor are always along the resistance of the smallest flow. In the conductor surface and the near surface structure element and the conductor surface is basically parallel to the electronic transposition in which the flow resistance is small. And in the internal structure of the conductor elements were up and down, left and right, front and rear space arrangement, the direction of the flow of electrons to be subject to five directions of resistance, (and only three directions in the surface resistance) visible in the conductor near the surface of the resistance than Much smaller in the interior, thus leading to the skin effect of the current.

With the development of the industry, switching power supply power is rising, the operating frequency of 20kHz or more, the output power of more than 30kW toroidal transformers such as the use of traditional ferrite materials, processing more difficult, batch consistency and temperature stability will be a problem, and the transformer volume Large, can not meet the high-frequency power and miniaturization of the development needs. Fe-based nanocrystalline soft magnetic material prepared by rapid solidification technology is characterized by high saturation magnetic induction, high permeability, low loss, good temperature stability, short processing cycle, environmental protection, batch consistency and temperature stability. And a series of advantages in high-power high-frequency power transformer on the application of great value. After years of development, nanocrystalline soft magnetic materials have been in the inverter welding power, current transformers, switching power supply, electromagnetic compatibility devices have been widely used.

Filter capacitors, common mode inductor chokes , magnetic beads in the EMC design circuit is a common figure, but also eliminate the three major electromagnetic interference tool. For the role of these three in the circuit, I believe there are many engineers do not know.

Three-phase transformer consists of three core columns, each core column around the same phase of the two coils, one high-voltage coil, the other is low-voltage coil. Lei Lang Shanghai transformer manufacturers now to break down the three-phase transformer works: