The powder core distributes the air gap core, which is mainly used for the application of carrying power inductance, especially the SMPS output filter, also known as one of the DC inductance combining the magnetic powder core with the differential inductance, the anti-excitation transformer and the step-down inductor. The magnetic powder core has important factors such as high resistivity, low lag and eddy current loss. In addition, the inductance stability is acceptable under AC and DC conditions. Different cores are available, but it may vary in size, so his kernel is different at a height level. Due to the possible appearance of the mold, the cavity is combined with the core height level. These types of magnetic powder cores are not forced with organic adhesives, so it does not show a thermal aging effect and is treated with a powder core. Of all six materials, each has its own advantages. The first material of MPP is used for the lowest core loss, which means the magnetic mollypermalloy powder core, which may be suitable for the anti-excitation transformer, the buck boost transformer. The specified air gap of the MPP core rod is to hide the miscellaneous magnetic field and eliminate the gap loss error consisting of the gap ferrite body core. The design dominated by DC bias has a small core size, and because it uses high throughput capacity, it carries high throughput materials. This is also suitable for the energy storage filter inductor carried in the SMPS. This type of powder core is a fixed size, which can reduce costs when the inductor carries a large amount of DC and the remaining flux density is very small. XFLUX is suitable for small and medium range of inductance and choke. In advantageous applications, the saturation level is high, while the inductance is heavy in the UPS and power factor correction boost. Another material is kool mu, which is reasonably priced and has lower loss and mainly good thermal properties when related to the power core. When the high flux density and low core loss in the power factor correction circuit are the same as the one-way drive applications such as pulse transformers and anti-excitation Transformers, kool mu is very useful. The next material of the 75 series core, while maintaining a lower core loss than Xflux and containing iron, aluminum and silicon, performs better than the koollmu core. It offers a low-cost alternative with a substantial increase in high throughput and core loss. Finally, the amovler core is a unique powder that is compounded with the allocated gap material, which is the concept of a PFC and an output choke. The amorphous band has been converted into powder, a non-flux core with similar properties, with soft saturation. For computers, servers, and industrial power units that may involve a PFC or output choke, this amovler core is the main choice.