SMT Planar Inductor 30-3000kva Transformer Core Sheet

Product Specification

SMT Planar Inductor EI Lamination Core Lowest DCR

Power SMT Planar Inductor with high efficiency lowest DCR lowest inductance Core

The general part of the commonly used transformer core is made of silicon steel sheet. Silicon steel is 32313133353236313431303231363533e58685e5aeb931333332636364 a steel containing silicon (silicon is also called silicon), and its silicon content is in. 0.8% ~ 4.8%. The core of the transformer made of silicon steel is because silicon steel itself is a magnetic substance with strong magnetic permeability. It can generate a large magnetic induction intensity in the energized coil. This can reduce the size of the transformer. The transformer is in AC state [The power loss is not only in the resistance of the coil. It also occurs in the iron core under the alternating current magnetization. The power loss in the iron core is usually called ‘iron loss’. Iron loss is caused by two reasons, one is ‘hysteresis loss’ and the other is ‘eddy current loss’.
Hysteresis loss is the iron loss caused by the presence of hysteresis in the iron core during magnetization. The size of this loss is proportional to the area surrounded by the hysteresis loop of the material, which is proportional to the narrowness of the hysteresis loop of silicon steel. The hysteresis loss of the iron core used as a transformer is small, which can greatly reduce the degree of heat generation.
When the transformer is working, the magnetic flux generated by the alternating current in the coil is of course alternating. The changing magnetic flux generates an induced current in the iron core. The induced current generated in the iron core circulates in the plane perpendicular to the direction of the Dzizi, so the eddy current loss is also caused by the eddy current. In order to reduce the eddy current loss, the iron core of the transformer is stacked with silicon steel sheets insulated from each other. The thirsty current flows in the narrow and long loop through a smaller cross-section to increase the electric limit of the eddy current path; meanwhile. Silicon increases the resistivity of the material. It also plays a role in reducing eddy currents
For the iron core of the transformer, a cold-rolled silicon steel sheet with a thickness of 0.35 mm is generally used. According to the size of the required iron core, it is cut into long pieces, and then overlapped into the shape of "Japanese" or "mouth". In principle, if the vortex is reduced, the thinner the silicon steel sheet is, the narrower the spliced ​​strip is. The better the effect. This reduces the eddy current loss, lowers the temperature rise, and also saves the material of the silicon steel sheet. However, when actually manufacturing the silicon steel sheet iron core, it is not only based on the above-mentioned favorable factors. Because the iron core is made that way, it needs to be greatly increased. Man-hours also reduce the effective cross-section of the r core. Therefore, when using silicon steel sheet to make the transformer core, we should weigh the pros and cons from the specific situation and choose the best size.