Premium nanocrystalline transformer core manufacturer and supplier in China? Transmart Industrial Limited is an one stop solution provider for magnetic cores and chokes, supplying various magnetic cores in Nanocrystalline , Amorphous and Silicon steels, supplying soft magnetic materials, soft magnetic cores, toroidal transformer, nanocrystalline cores, toroidal core, electrical and electronic components as well as other materials for transformers and associated industries. Read even more information at https://www.transmart.net/nanocrystalline-cores. Transmart electrical steel suppliers & manufacturers offer a variety of solutions based on soft magnetic materials. The soft magnetic materials series has become a hot product of Transmart Industrial. In this category you will find different kinds of soft magnetic materials that we produce, including traditional Electrical steel ( Silicon steel) raging from 0.05mm to 0.50mm thickness, latest high performance materials of Nanocrystalline foil and Amorphous ribbon.
Since silicon steel has the above advantages, why not use the whole silicon steel as the iron core and process it into a sheet? This is because the sheet iron core can reduce another iron loss – “eddy current loss”. When the transformer works, there is alternating current in the coil, and the magnetic flux generated by it is of course alternating. This changing magnetic flux produces an induced current in the iron core. The induced current generated in the iron core flows in a ring in a plane perpendicular to the magnetic flux direction, so it is called eddy current. Eddy current losses also heat the core. In order to reduce the eddy current loss, the iron core of the transformer is stacked with silicon steel sheets insulated from each other, so that the eddy current passes through a small section in the narrow and long circuit, so as to increase the resistance on the eddy current path; At the same time, the silicon in silicon steel increases the resistivity of the material and reduces the eddy current.
This is because the sheet iron core can reduce another iron loss – “eddy current loss”. When the transformer works, there is alternating current in the coil, and the magnetic flux generated by it is of course alternating. This changing magnetic flux produces an induced current in the iron core. The induced current generated in the iron core flows in a ring in a plane perpendicular to the magnetic flux direction, so it is called eddy current. Eddy current losses also heat the core. In order to reduce the eddy current loss, the iron core of the transformer is stacked with silicon steel sheets insulated from each other, so that the eddy current passes through a small section in the narrow and long circuit, so as to increase the resistance on the eddy current path; At the same time, the silicon in silicon steel increases the resistivity of the material and reduces the eddy current. rolled silicon steel sheet is selected. It is cut into long pieces according to the size of the required iron core, and then overlapped into “day” shape or “mouth” shape. In principle, in order to reduce eddy current, the thinner the silicon steel sheet, the narrower the spliced strip, and the better the effect. This not only reduces the eddy current loss and temperature rise, but also saves the material of silicon steel sheet. But in fact, when making silicon steel sheet iron core. Not only from the above favorable factors, because making the iron core in that way will greatly increase the working hours and reduce the effective section of the iron core. Therefore, when making transformer iron core with silicon steel sheet, we should start from the specific situation, weigh the advantages and disadvantages and choose the best size.
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However, at the same BM, the loss of Fe based amorphous alloy is smaller than that of 0.23mm thick 3% silicon steel. It is generally believed that the reason for low loss is the thin thickness and high resistivity of iron-based amorphous alloy strip. This is only one aspect. The main reason is that the iron-based amorphous alloy is amorphous, the atomic arrangement is random, there is no magnetocrystalline anisotropy caused by atomic directional arrangement, and there is no grain boundary causing local deformation and composition offset. Therefore, the energy barrier hindering domain wall motion and magnetic moment rotation is very small, with unprecedented soft magnetism, so it has high permeability, low coercivity and low loss.
Application field of nano magnetic core: Noise is the main circuit interference source in many power electronic devices. Various filter elements must be used to reduce noise. As the main component of differential mode inductance, magnetic particle core plays a key role in the filter. In order to obtain better filtering effect, the magnetic particle core material is required to have the following performance characteristics: high saturated magnetic induction, wide constant magnetic conductivity, good frequency characteristics, good AC / DC superposition characteristics and low loss characteristics. According to the above requirements, soft magnetic materials for inductance such as iron powder core, notched amorphous alloy core and iron nickel aluminum powder core (MPP powder core) have been developed successively. These materials have played their respective advantages and roles under different application conditions.
